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A09b_2D_vector_sandbox.html
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<h2></h2>
<div class="highlight"><pre><span></span><span class="c1"># Filename: A09b_2D_vector_sandbox.py</span>
<span class="c1"># Written by: James D. Miller</span>
<span class="kn">import</span> <span class="nn">sys</span><span class="o">,</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">pygame</span>
<span class="c1"># PyGame Constants</span>
<span class="kn">from</span> <span class="nn">pygame.locals</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">pygame.color</span> <span class="kn">import</span> <span class="n">THECOLORS</span>
<span class="c1"># PyGame gui</span>
<span class="kn">from</span> <span class="nn">pgu</span> <span class="kn">import</span> <span class="n">gui</span>
<span class="c1"># Import the vector class from a local module (in this same directory)</span>
<span class="kn">from</span> <span class="nn">vec2d_jdm</span> <span class="kn">import</span> <span class="n">Vec2D</span>
<span class="c1">#=====================================================================</span>
<span class="c1"># Classes</span>
<span class="c1">#=====================================================================</span>
<span class="k">class</span> <span class="nc">Vectors_Add</span><span class="p">():</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">vectors_2d_m</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">theColor</span><span class="o">=</span><span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"green"</span><span class="p">]):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">color</span> <span class="o">=</span> <span class="n">theColor</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selectable</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">radius_m</span> <span class="o">=</span> <span class="mf">0.10</span>
<span class="bp">self</span><span class="o">.</span><span class="n">radius_px</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="nb">round</span><span class="p">(</span><span class="n">env</span><span class="o">.</span><span class="n">px_from_m</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">radius_m</span><span class="p">)))</span>
<span class="k">if</span> <span class="n">vectors_2d_m</span> <span class="o">==</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">vectors_2d_m</span> <span class="o">=</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">vectors_2d_m</span> <span class="o">=</span> <span class="n">vectors_2d_m</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_2d_m</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_history_tuples_px</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">needing_reset</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="s2">"reset"</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_2d_m</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)</span>
<span class="k">for</span> <span class="n">eachvector_2d_m</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">vectors_2d_m</span><span class="p">:</span>
<span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s2">"add"</span><span class="p">:</span>
<span class="c1"># Change the base vector to the running total.</span>
<span class="n">eachvector_2d_m</span><span class="o">.</span><span class="n">base_2d_m</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_2d_m</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_2d_m</span> <span class="o">+=</span> <span class="n">eachvector_2d_m</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">eachvector_2d_m</span><span class="o">.</span><span class="n">base_2d_m</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)</span>
<span class="c1"># Put the current total vector into a FIFO.</span>
<span class="k">if</span> <span class="p">(</span><span class="n">v_sb</span><span class="o">.</span><span class="n">tail_time_s</span> <span class="o">></span> <span class="n">v_sb</span><span class="o">.</span><span class="n">tail_timelimit_s</span><span class="p">)</span> <span class="ow">and</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">enable_tails</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_2d_m</span><span class="p">)</span>
<span class="c1"># Displace the oldest part of the FIFO; pop it off.</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span><span class="p">)</span> <span class="o">></span> <span class="mi">700</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">tail_time_s</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">def</span> <span class="nf">draw_circle_vector</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">vec_A_2d_m</span><span class="p">,</span> <span class="n">vec_B_2d_m</span><span class="p">,</span> <span class="n">color</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">small_circle</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
<span class="k">if</span> <span class="n">color</span><span class="o">==</span><span class="kc">None</span><span class="p">:</span>
<span class="n">color</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span>
<span class="c1"># Draw line segment</span>
<span class="n">line_points</span> <span class="o">=</span> <span class="p">[</span><span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span><span class="n">vec_A_2d_m</span><span class="p">),</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span><span class="n">vec_B_2d_m</span><span class="p">)]</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">aaline</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="n">color</span><span class="p">,</span> <span class="n">line_points</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">line_points</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="kc">True</span><span class="p">)</span>
<span class="c1"># Draw circle.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">radius_px</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="nb">round</span><span class="p">(</span><span class="n">env</span><span class="o">.</span><span class="n">px_from_m</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">radius_m</span><span class="p">)))</span>
<span class="k">if</span> <span class="n">small_circle</span><span class="p">:</span>
<span class="n">radius_px</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="nb">round</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">radius_px</span><span class="o">/</span><span class="mf">2.0</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">radius_px</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">radius_px</span>
<span class="k">if</span> <span class="n">radius_px</span> <span class="o"><</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">radius_px</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">circle</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="n">color</span><span class="p">,</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span><span class="n">vec_B_2d_m</span><span class="p">),</span> <span class="n">radius_px</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">draw</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">display_total</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="s2">"add"</span><span class="p">)</span>
<span class="c1"># Draw the total vector.</span>
<span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_2d_m</span><span class="p">,</span> <span class="n">theColor</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">)</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">needing_reset</span> <span class="o">=</span> <span class="kc">True</span>
<span class="c1"># Draw the total vector's history.</span>
<span class="k">if</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">enable_tails</span><span class="p">:</span>
<span class="k">if</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">lines_not_points</span><span class="p">:</span>
<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span><span class="p">)</span> <span class="o">>=</span> <span class="mi">2</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_history_tuples_px</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">point_2d_m</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_history_tuples_px</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">point_2d_m</span><span class="p">))</span>
<span class="c1">#pygame.draw.lines(game_window.surface, self.color, False, self.total_history_tuples_px, 1)</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">aalines</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">,</span> <span class="kc">False</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_history_tuples_px</span><span class="p">,</span> <span class="kc">True</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">for</span> <span class="n">point_2d_m</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">total_history_2d_m</span><span class="p">:</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">circle</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">,</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">point_2d_m</span><span class="p">),</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">needing_reset</span><span class="p">:</span>
<span class="c1"># Reset these so all are drawn from the origin.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="s2">"reset"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">needing_reset</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">class</span> <span class="nc">Visual_Vec2D</span><span class="p">(</span> <span class="n">Vec2D</span><span class="p">):</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x_m_or_Vec2D</span><span class="p">,</span> <span class="n">y_m</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">theColor</span><span class="o">=</span><span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"yellow"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=</span><span class="mi">0</span><span class="p">):</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span> <span class="n">x_m_or_Vec2D</span><span class="p">,</span> <span class="n">Vec2D</span><span class="p">):</span>
<span class="n">x_m</span> <span class="o">=</span> <span class="n">x_m_or_Vec2D</span><span class="o">.</span><span class="n">x</span>
<span class="n">y_m</span> <span class="o">=</span> <span class="n">x_m_or_Vec2D</span><span class="o">.</span><span class="n">y</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">x_m</span> <span class="o">=</span> <span class="n">x_m_or_Vec2D</span>
<span class="n">y_m</span> <span class="o">=</span> <span class="n">y_m</span>
<span class="n">Vec2D</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x_m</span><span class="p">,</span> <span class="n">y_m</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rotation_rate_dps</span> <span class="o">=</span> <span class="n">rotation_rate_dps</span>
<span class="bp">self</span><span class="o">.</span><span class="n">radius_m</span> <span class="o">=</span> <span class="mf">0.10</span>
<span class="bp">self</span><span class="o">.</span><span class="n">color</span> <span class="o">=</span> <span class="n">theColor</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selectable</span> <span class="o">=</span> <span class="kc">True</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected</span> <span class="o">=</span> <span class="kc">False</span>
<span class="c1"># Projection target</span>
<span class="bp">self</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Base vector (to displace the drawing of the vector from the origin)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">base_2d_m</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="mf">0.0</span><span class="p">,</span><span class="mf">0.0</span><span class="p">)</span>
<span class="c1"># Arrowhead definition.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sf_x</span> <span class="o">=</span> <span class="mf">0.3</span>
<span class="bp">self</span><span class="o">.</span><span class="n">sf_y</span> <span class="o">=</span> <span class="mf">0.1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">arrowhead_vertices_2d_m</span> <span class="o">=</span><span class="p">[</span><span class="n">Vec2D</span><span class="p">(</span> <span class="o">-</span><span class="mf">1.00</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">sf_x</span><span class="p">,</span> <span class="o">-</span><span class="mf">0.50</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">sf_y</span><span class="p">),</span>
<span class="n">Vec2D</span><span class="p">(</span> <span class="o">-</span><span class="mf">1.00</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">sf_x</span><span class="p">,</span> <span class="mf">0.50</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">sf_y</span><span class="p">),</span>
<span class="n">Vec2D</span><span class="p">(</span> <span class="mf">0.00</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">sf_x</span><span class="p">,</span> <span class="mf">0.00</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">sf_y</span><span class="p">)]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rt_vertices_2d_px</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Rotate this vector a wee bit during each time step.</span>
<span class="k">if</span> <span class="p">(</span><span class="ow">not</span> <span class="n">env</span><span class="o">.</span><span class="n">freeze</span><span class="p">)</span> <span class="ow">and</span> <span class="p">(</span><span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">selected</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rotated</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">rotation_rate_dps</span> <span class="o">*</span> <span class="n">env</span><span class="o">.</span><span class="n">dt_s</span><span class="p">,</span> <span class="n">sameVector</span><span class="o">=</span><span class="kc">True</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">angle_deg</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">get_angle</span><span class="p">()</span>
<span class="c1"># Rotate and translate the arrow head and convert for screen display.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rotate_and_translate_vertices</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">arrowhead_vertices_2d_m</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">angle_deg</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">rotate_and_translate_vertices</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">vertices_2d_m</span><span class="p">,</span> <span class="n">angle_deg</span><span class="p">):</span>
<span class="c1"># Put modified vectors in a new list.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rt_vertices_2d_px</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">vertex_2d_m</span> <span class="ow">in</span> <span class="n">vertices_2d_m</span><span class="p">:</span>
<span class="c1"># Rotated and translated (add to the shaft).</span>
<span class="n">rt_vertex_2d_m</span> <span class="o">=</span> <span class="n">vertex_2d_m</span><span class="o">.</span><span class="n">rotated</span><span class="p">(</span> <span class="n">angle_deg</span><span class="p">)</span> <span class="o">+</span> <span class="bp">self</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">base_2d_m</span>
<span class="c1"># Convert for screen display.</span>
<span class="n">rt_vertex_2d_px</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">rt_vertex_2d_m</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">rt_vertices_2d_px</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">rt_vertex_2d_px</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">draw_selection_circle</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Draw circle.</span>
<span class="n">radius_px</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="nb">round</span><span class="p">(</span><span class="n">env</span><span class="o">.</span><span class="n">px_from_m</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">radius_m</span><span class="p">)))</span>
<span class="k">if</span> <span class="n">radius_px</span> <span class="o"><</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">radius_px</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">circle</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">,</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span><span class="bp">self</span><span class="p">),</span> <span class="n">radius_px</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">draw_vector</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Draw main body of the arrow: line from base point to end point.</span>
<span class="n">line_points</span> <span class="o">=</span> <span class="p">[</span><span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">base_2d_m</span><span class="p">),</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span><span class="bp">self</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">base_2d_m</span><span class="p">)]</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">aaline</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">,</span> <span class="n">line_points</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">line_points</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="kc">True</span><span class="p">)</span>
<span class="c1">#pygame.draw.line(game_window.surface, self.color, line_points[0], line_points[1], 2)</span>
<span class="c1"># Draw the arrowhead</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">length_squared</span><span class="p">()</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">base_2d_m</span><span class="o">.</span><span class="n">equal</span><span class="p">(</span><span class="n">Vec2D</span><span class="p">(</span><span class="mf">0.0</span><span class="p">,</span><span class="mf">0.0</span><span class="p">)):</span>
<span class="n">arrow_head_line_thickness</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">arrow_head_line_thickness</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">polygon</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">rt_vertices_2d_px</span><span class="p">,</span> <span class="n">arrow_head_line_thickness</span><span class="p">)</span>
<span class="c1"># Draw a selection circle if there is a non-zero base vector.</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">base_2d_m</span><span class="o">.</span><span class="n">not_equal</span><span class="p">(</span> <span class="n">Vec2D</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">draw_selection_circle</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">draw</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="c1"># Main vector</span>
<span class="bp">self</span><span class="o">.</span><span class="n">draw_vector</span><span class="p">()</span>
<span class="k">if</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">selected</span> <span class="ow">and</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">enable_components</span><span class="p">):</span>
<span class="c1"># Its two components</span>
<span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">x</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">)</span><span class="o">.</span><span class="n">draw_vector</span><span class="p">()</span>
<span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mi">0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">y</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">)</span><span class="o">.</span><span class="n">draw_vector</span><span class="p">()</span>
<span class="c1"># The normal</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">length_squared</span><span class="p">()</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
<span class="n">normal_2d_m</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">normal</span><span class="p">()</span> <span class="c1"># This returns a Vec2D object.</span>
<span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="n">normal_2d_m</span><span class="p">,</span> <span class="n">theColor</span><span class="o">=</span><span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"red"</span><span class="p">])</span><span class="o">.</span><span class="n">draw_vector</span><span class="p">()</span>
<span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="n">normal_2d_m</span><span class="o">.</span><span class="n">rotate90</span><span class="p">(),</span> <span class="n">theColor</span><span class="o">=</span><span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"red"</span><span class="p">])</span><span class="o">.</span><span class="n">draw_vector</span><span class="p">()</span>
<span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">projection_onto</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">projection_target_2d_m</span><span class="p">),</span> <span class="n">theColor</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">color</span><span class="p">)</span><span class="o">.</span><span class="n">draw_vector</span><span class="p">()</span>
<span class="k">class</span> <span class="nc">VectorSandbox</span><span class="p">:</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">walls_dic</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">vectors</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">walls</span> <span class="o">=</span> <span class="n">walls_dic</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">display_total</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">enable_components</span> <span class="o">=</span> <span class="kc">True</span>
<span class="bp">self</span><span class="o">.</span><span class="n">enable_tails</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">lines_not_points</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tail_time_s</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">tail_timelimit_s</span> <span class="o">=</span> <span class="mi">1</span><span class="o">/</span><span class="mf">30.0</span>
<span class="k">def</span> <span class="nf">draw</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1">#{"L_m":0.0, "R_m":10.0, "B_m":0.0, "T_m":10.0}</span>
<span class="c1"># Define endpoints for each axis.</span>
<span class="n">x_pos_2d_px</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">Vec2D</span><span class="p">(</span> <span class="bp">self</span><span class="o">.</span><span class="n">walls</span><span class="p">[</span><span class="s1">'R_m'</span><span class="p">],</span> <span class="mf">0.0</span> <span class="p">))</span>
<span class="n">x_neg_2d_px</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">Vec2D</span><span class="p">(</span> <span class="o">-</span><span class="bp">self</span><span class="o">.</span><span class="n">walls</span><span class="p">[</span><span class="s1">'R_m'</span><span class="p">],</span> <span class="mf">0.0</span> <span class="p">))</span>
<span class="n">y_pos_2d_px</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">walls</span><span class="p">[</span><span class="s1">'T_m'</span><span class="p">]))</span>
<span class="n">y_neg_2d_px</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertWorldToScreen</span><span class="p">(</span> <span class="n">Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="o">-</span><span class="bp">self</span><span class="o">.</span><span class="n">walls</span><span class="p">[</span><span class="s1">'T_m'</span><span class="p">]))</span>
<span class="c1"># Draw the two axes.</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">line</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"orangered1"</span><span class="p">],</span> <span class="n">x_pos_2d_px</span><span class="p">,</span> <span class="n">x_neg_2d_px</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">line</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"orangered1"</span><span class="p">],</span> <span class="n">y_pos_2d_px</span><span class="p">,</span> <span class="n">y_neg_2d_px</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">checkForVectorAtCursorPosition</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x_px_or_tuple</span><span class="p">,</span> <span class="n">y_px</span> <span class="o">=</span> <span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">y_px</span> <span class="o">==</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">x_px</span> <span class="o">=</span> <span class="n">x_px_or_tuple</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">y_px</span> <span class="o">=</span> <span class="n">x_px_or_tuple</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">x_px</span> <span class="o">=</span> <span class="n">x_px_or_tuple</span>
<span class="n">y_px</span> <span class="o">=</span> <span class="n">y_px</span>
<span class="n">test_position_2d_m</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertScreenToWorld</span><span class="p">(</span><span class="n">Vec2D</span><span class="p">(</span><span class="n">x_px</span><span class="p">,</span> <span class="n">y_px</span><span class="p">))</span>
<span class="k">for</span> <span class="n">vector</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">vectors</span><span class="p">:</span>
<span class="k">if</span> <span class="n">vector</span><span class="o">.</span><span class="n">selectable</span><span class="p">:</span>
<span class="n">vector_difference_2d_m</span> <span class="o">=</span> <span class="n">test_position_2d_m</span> <span class="o">-</span> <span class="n">vector</span>
<span class="c1"># Use squared lengths for speed (avoid square root)</span>
<span class="n">mag_of_difference_m2</span> <span class="o">=</span> <span class="n">vector_difference_2d_m</span><span class="o">.</span><span class="n">length_squared</span><span class="p">()</span>
<span class="k">if</span> <span class="n">mag_of_difference_m2</span> <span class="o"><</span> <span class="n">vector</span><span class="o">.</span><span class="n">radius_m</span><span class="o">**</span><span class="mi">2</span><span class="p">:</span>
<span class="n">vector</span><span class="o">.</span><span class="n">selected</span> <span class="o">=</span> <span class="kc">True</span>
<span class="k">return</span> <span class="n">vector</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">updateSelectedVector</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span> <span class="o">==</span> <span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">env</span><span class="o">.</span><span class="n">buttonIsStillDown</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">checkForVectorAtCursorPosition</span><span class="p">(</span><span class="n">env</span><span class="o">.</span><span class="n">cursor_location_px</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">env</span><span class="o">.</span><span class="n">buttonIsStillDown</span><span class="p">:</span>
<span class="c1"># Deselect the vector and bomb out of here.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span><span class="o">.</span><span class="n">selected</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">return</span> <span class="kc">None</span>
<span class="k">else</span><span class="p">:</span>
<span class="c1"># Drag the vector to follow the cursor.</span>
<span class="n">cursor_pos_2d_m</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertScreenToWorld</span><span class="p">(</span><span class="n">Vec2D</span><span class="p">(</span><span class="n">env</span><span class="o">.</span><span class="n">cursor_location_px</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span><span class="o">.</span><span class="n">x</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span><span class="o">.</span><span class="n">y</span> <span class="o">=</span> <span class="n">cursor_pos_2d_m</span><span class="o">.</span><span class="n">x</span><span class="p">,</span> <span class="n">cursor_pos_2d_m</span><span class="o">.</span><span class="n">y</span>
<span class="k">class</span> <span class="nc">Environment</span><span class="p">:</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">screenSize_px</span><span class="p">,</span> <span class="n">length_x_m</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="n">screenSize_px</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">viewOffset_px</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="o">-</span><span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span><span class="o">.</span><span class="n">x</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span><span class="o">-</span><span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span><span class="o">.</span><span class="n">y</span><span class="o">/</span><span class="mi">2</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">viewCenter_px</span> <span class="o">=</span> <span class="n">Vec2D</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span> <span class="o">=</span> <span class="mi">1</span>
<span class="bp">self</span><span class="o">.</span><span class="n">viewZoom_rate</span> <span class="o">=</span> <span class="mf">0.01</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_b</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_n</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_m</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_h</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="bp">self</span><span class="o">.</span><span class="n">px_to_m</span> <span class="o">=</span> <span class="n">length_x_m</span><span class="o">/</span><span class="nb">float</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span><span class="o">.</span><span class="n">x</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">m_to_px</span> <span class="o">=</span> <span class="p">(</span><span class="nb">float</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span><span class="o">.</span><span class="n">x</span><span class="p">)</span><span class="o">/</span><span class="n">length_x_m</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">inhibit_screen_clears</span> <span class="o">=</span> <span class="kc">False</span>
<span class="c1"># Keyboard/mouse state</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor_location_px</span> <span class="o">=</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)</span> <span class="c1"># x_px, y_px</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mouse_button</span> <span class="o">=</span> <span class="mi">1</span> <span class="c1"># 1, 2, or 3</span>
<span class="bp">self</span><span class="o">.</span><span class="n">buttonIsStillDown</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">selected_vector</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">dt_s</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">freeze</span> <span class="o">=</span> <span class="kc">False</span>
<span class="c1"># Convert from meters to pixels </span>
<span class="k">def</span> <span class="nf">px_from_m</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dx_m</span><span class="p">):</span>
<span class="k">return</span> <span class="n">dx_m</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">m_to_px</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span>
<span class="c1"># Convert from pixels to meters</span>
<span class="c1"># Note: still floating values here)</span>
<span class="k">def</span> <span class="nf">m_from_px</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">dx_px</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">float</span><span class="p">(</span><span class="n">dx_px</span><span class="p">)</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">px_to_m</span> <span class="o">/</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span>
<span class="k">def</span> <span class="nf">control_zoom_and_view</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_h</span> <span class="o">==</span> <span class="s2">"D"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span> <span class="o">+=</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom_rate</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">key_n</span> <span class="o">==</span> <span class="s2">"D"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span> <span class="o">-=</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom_rate</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span>
<span class="k">def</span> <span class="nf">ConvertScreenToWorld</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">point_2d_px</span><span class="p">):</span>
<span class="c1">#self.viewOffset_px = self.viewCenter_px</span>
<span class="n">x_m</span> <span class="o">=</span> <span class="p">(</span> <span class="n">point_2d_px</span><span class="o">.</span><span class="n">x</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewOffset_px</span><span class="o">.</span><span class="n">x</span><span class="p">)</span> <span class="o">/</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">m_to_px</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span><span class="p">)</span>
<span class="n">y_m</span> <span class="o">=</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span><span class="o">.</span><span class="n">y</span> <span class="o">-</span> <span class="n">point_2d_px</span><span class="o">.</span><span class="n">y</span> <span class="o">+</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewOffset_px</span><span class="o">.</span><span class="n">y</span><span class="p">)</span> <span class="o">/</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">m_to_px</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Vec2D</span><span class="p">(</span> <span class="n">x_m</span><span class="p">,</span> <span class="n">y_m</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">ConvertWorldToScreen</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">point_2d_m</span><span class="p">):</span>
<span class="w"> </span><span class="sd">"""</span>
<span class="sd"> Convert from world to screen coordinates (pixels).</span>
<span class="sd"> In the class instance, we store a zoom factor, an offset indicating where</span>
<span class="sd"> the view extents start at, and the screen size (in pixels).</span>
<span class="sd"> """</span>
<span class="c1"># self.viewOffset = self.viewCenter - self.screenSize_px/2</span>
<span class="c1">#self.viewOffset = self.viewCenter_px</span>
<span class="n">x_px</span> <span class="o">=</span> <span class="p">(</span><span class="n">point_2d_m</span><span class="o">.</span><span class="n">x</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">m_to_px</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span><span class="p">)</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewOffset_px</span><span class="o">.</span><span class="n">x</span>
<span class="n">y_px</span> <span class="o">=</span> <span class="p">(</span><span class="n">point_2d_m</span><span class="o">.</span><span class="n">y</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">m_to_px</span> <span class="o">*</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewZoom</span><span class="p">)</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">viewOffset_px</span><span class="o">.</span><span class="n">y</span>
<span class="n">y_px</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">screenSize_px</span><span class="o">.</span><span class="n">y</span> <span class="o">-</span> <span class="n">y_px</span>
<span class="c1"># Return a tuple of integers.</span>
<span class="k">return</span> <span class="n">Vec2D</span><span class="p">(</span><span class="n">x_px</span><span class="p">,</span> <span class="n">y_px</span><span class="p">,</span> <span class="s2">"int"</span><span class="p">)</span><span class="o">.</span><span class="n">tuple</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">get_user_input</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Get all the events since the last call to get().</span>
<span class="k">for</span> <span class="n">event</span> <span class="ow">in</span> <span class="n">pygame</span><span class="o">.</span><span class="n">event</span><span class="o">.</span><span class="n">get</span><span class="p">():</span>
<span class="k">if</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">type</span> <span class="o">==</span> <span class="n">pygame</span><span class="o">.</span><span class="n">QUIT</span><span class="p">):</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">type</span> <span class="o">==</span> <span class="n">pygame</span><span class="o">.</span><span class="n">KEYDOWN</span><span class="p">):</span>
<span class="k">if</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span> <span class="o">==</span> <span class="n">K_ESCAPE</span><span class="p">):</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_KP1</span><span class="p">):</span>
<span class="k">return</span> <span class="s2">"1p"</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_KP2</span><span class="p">):</span>
<span class="k">return</span> <span class="s2">"2p"</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_KP3</span><span class="p">):</span>
<span class="k">return</span> <span class="s2">"3p"</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_1</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">1</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_2</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">2</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_3</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">3</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_4</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">4</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_5</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">5</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_6</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">6</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_7</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">7</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_8</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">8</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_9</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">9</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_0</span><span class="p">):</span>
<span class="k">return</span> <span class="mi">0</span>
<span class="c1"># Sandbox control toggles.</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_c</span><span class="p">):</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">enable_components</span> <span class="o">=</span> <span class="ow">not</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">enable_components</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_t</span><span class="p">):</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">enable_tails</span> <span class="o">=</span> <span class="ow">not</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">enable_tails</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_f</span><span class="p">):</span>
<span class="n">env</span><span class="o">.</span><span class="n">freeze</span> <span class="o">=</span> <span class="ow">not</span> <span class="n">env</span><span class="o">.</span><span class="n">freeze</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_a</span><span class="p">):</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">display_total</span> <span class="o">=</span> <span class="ow">not</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">display_total</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_l</span><span class="p">):</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">lines_not_points</span> <span class="o">=</span> <span class="ow">not</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">lines_not_points</span>
<span class="c1"># Zoom keys.</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_b</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_b</span> <span class="o">=</span> <span class="s1">'D'</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_n</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_n</span> <span class="o">=</span> <span class="s1">'D'</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_m</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_m</span> <span class="o">=</span> <span class="s1">'D'</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_h</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_h</span> <span class="o">=</span> <span class="s1">'D'</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="s2">"nothing set up for this key"</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">type</span> <span class="o">==</span> <span class="n">pygame</span><span class="o">.</span><span class="n">KEYUP</span><span class="p">):</span>
<span class="c1"># Zoom keys</span>
<span class="k">if</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_b</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_b</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_n</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_n</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_m</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_m</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="k">elif</span> <span class="p">(</span><span class="n">event</span><span class="o">.</span><span class="n">key</span><span class="o">==</span><span class="n">K_h</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">key_h</span> <span class="o">=</span> <span class="s1">'U'</span>
<span class="k">elif</span> <span class="n">event</span><span class="o">.</span><span class="n">type</span> <span class="o">==</span> <span class="n">pygame</span><span class="o">.</span><span class="n">MOUSEBUTTONDOWN</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">buttonIsStillDown</span> <span class="o">=</span> <span class="kc">True</span>
<span class="p">(</span><span class="n">button1</span><span class="p">,</span> <span class="n">button2</span><span class="p">,</span> <span class="n">button3</span><span class="p">)</span> <span class="o">=</span> <span class="n">pygame</span><span class="o">.</span><span class="n">mouse</span><span class="o">.</span><span class="n">get_pressed</span><span class="p">()</span>
<span class="k">if</span> <span class="n">button1</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mouse_button</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">elif</span> <span class="n">button2</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mouse_button</span> <span class="o">=</span> <span class="mi">2</span>
<span class="k">elif</span> <span class="n">button3</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mouse_button</span> <span class="o">=</span> <span class="mi">3</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mouse_button</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">elif</span> <span class="n">event</span><span class="o">.</span><span class="n">type</span> <span class="o">==</span> <span class="n">pygame</span><span class="o">.</span><span class="n">MOUSEBUTTONUP</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">buttonIsStillDown</span> <span class="o">=</span> <span class="kc">False</span>
<span class="bp">self</span><span class="o">.</span><span class="n">mouse_button</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">buttonIsStillDown</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">cursor_location_px</span> <span class="o">=</span> <span class="p">(</span><span class="n">mouseX</span><span class="p">,</span> <span class="n">mouseY</span><span class="p">)</span> <span class="o">=</span> <span class="n">pygame</span><span class="o">.</span><span class="n">mouse</span><span class="o">.</span><span class="n">get_pos</span><span class="p">()</span>
<span class="k">class</span> <span class="nc">GameWindow</span><span class="p">:</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">screen_tuple_px</span><span class="p">,</span> <span class="n">title</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">width_px</span> <span class="o">=</span> <span class="n">screen_tuple_px</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">height_px</span> <span class="o">=</span> <span class="n">screen_tuple_px</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span>
<span class="c1"># The initial World position vector of the Upper Right corner of the screen.</span>
<span class="c1"># Yes, that's right y_px = 0 for UR.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">UR_2d_m</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">ConvertScreenToWorld</span><span class="p">(</span><span class="n">Vec2D</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">width_px</span><span class="p">,</span> <span class="mi">0</span><span class="p">))</span>
<span class="c1"># Create a reference to the display surface object. This is a pygame "surface".</span>
<span class="c1"># Screen dimensions in pixels (tuple)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">surface</span> <span class="o">=</span> <span class="n">pygame</span><span class="o">.</span><span class="n">display</span><span class="o">.</span><span class="n">set_mode</span><span class="p">(</span><span class="n">screen_tuple_px</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update_caption</span><span class="p">(</span><span class="n">title</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">surface</span><span class="o">.</span><span class="n">fill</span><span class="p">(</span><span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"black"</span><span class="p">])</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">display</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">update_caption</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">title</span><span class="p">):</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">display</span><span class="o">.</span><span class="n">set_caption</span><span class="p">(</span> <span class="n">title</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">caption</span> <span class="o">=</span> <span class="n">title</span>
<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">display</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">clear</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="c1"># Useful for shifting between the various demos.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">surface</span><span class="o">.</span><span class="n">fill</span><span class="p">(</span><span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"black"</span><span class="p">])</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">display</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="c1">#===========================================================</span>
<span class="c1"># Functions</span>
<span class="c1">#===========================================================</span>
<span class="k">def</span> <span class="nf">make_some_vectors</span><span class="p">(</span><span class="n">resetmode</span><span class="p">):</span>
<span class="n">game_window</span><span class="o">.</span><span class="n">update_caption</span><span class="p">(</span><span class="s2">"Vector Sandbox V.1: Demo #"</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">resetmode</span><span class="p">))</span>
<span class="n">env</span><span class="o">.</span><span class="n">inhibit_screen_clears</span> <span class="o">=</span> <span class="kc">False</span>
<span class="n">env</span><span class="o">.</span><span class="n">always_render</span> <span class="o">=</span> <span class="kc">False</span>
<span class="k">if</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
<span class="n">v_1</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">4.0</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="mi">20</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">v_1</span><span class="p">)</span>
<span class="n">v_2</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">1.0</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"yellow"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=</span><span class="mi">180</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">v_2</span><span class="p">)</span>
<span class="n">v_1</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_2</span>
<span class="n">v_2</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_1</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span>
<span class="n">v_1</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">3.0</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="mi">20</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">v_1</span><span class="p">)</span>
<span class="n">v_2</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">2.0</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"yellow"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="mi">40</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">v_2</span><span class="p">)</span>
<span class="n">v_1</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_2</span>
<span class="n">v_2</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_1</span>
<span class="n">v_3</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">1.0</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"tan"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="mi">60</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">v_3</span><span class="p">)</span>
<span class="n">v_3</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_1</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">3</span><span class="p">:</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">11</span><span class="p">):</span>
<span class="n">temp</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="p">(</span><span class="mi">10</span><span class="o">*</span><span class="n">j</span><span class="p">))</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">temp</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="n">j</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">4</span><span class="p">:</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">11</span><span class="p">):</span>
<span class="n">temp</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">0.4</span><span class="o">*</span><span class="n">j</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="p">(</span><span class="mi">10</span><span class="o">*</span><span class="n">j</span><span class="p">))</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">temp</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="n">j</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">5</span><span class="p">:</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">11</span><span class="p">):</span>
<span class="n">temp</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mi">3</span><span class="o">-</span><span class="mf">0.2</span><span class="o">*</span><span class="n">j</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="p">(</span><span class="mi">10</span><span class="o">*</span><span class="n">j</span><span class="p">))</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">temp</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="n">j</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">6</span><span class="p">:</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">41</span><span class="p">):</span>
<span class="n">temp</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">0.4</span><span class="o">*</span><span class="n">j</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="p">(</span><span class="mi">10</span><span class="o">*</span><span class="n">j</span><span class="p">))</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">temp</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="n">j</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">resetmode</span> <span class="o">==</span> <span class="mi">7</span><span class="p">:</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">141</span><span class="p">):</span>
<span class="n">temp</span> <span class="o">=</span> <span class="n">Visual_Vec2D</span><span class="p">(</span> <span class="mf">0.0</span><span class="p">,</span> <span class="mf">0.4</span><span class="o">*</span><span class="n">j</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">rotation_rate_dps</span><span class="o">=-</span><span class="p">(</span><span class="mi">10</span><span class="o">*</span><span class="n">j</span><span class="p">))</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="o">.</span><span class="n">append</span><span class="p">(</span> <span class="n">temp</span><span class="p">)</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="n">j</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">projection_target_2d_m</span> <span class="o">=</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="n">Vectors_Add</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">print</span> <span class="s2">"Nothing set up for this key."</span>
<span class="k">def</span> <span class="nf">display_number</span><span class="p">(</span><span class="n">numeric_value</span><span class="p">,</span> <span class="n">font_object</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="s1">'FPS'</span><span class="p">):</span>
<span class="k">if</span> <span class="n">mode</span><span class="o">==</span><span class="s1">'FPS'</span><span class="p">:</span>
<span class="c1"># Small background rectangle for FPS text</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">draw</span><span class="o">.</span><span class="n">rect</span><span class="p">(</span><span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">],</span> <span class="n">pygame</span><span class="o">.</span><span class="n">Rect</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">35</span><span class="p">,</span> <span class="mi">20</span><span class="p">))</span>
<span class="c1"># The text</span>
<span class="n">fps_string</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%.0f</span><span class="s2">"</span> <span class="o">%</span> <span class="n">numeric_value</span>
<span class="n">txt_surface</span> <span class="o">=</span> <span class="n">font_object</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="n">fps_string</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"black"</span><span class="p">])</span>
<span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="o">.</span><span class="n">blit</span><span class="p">(</span><span class="n">txt_surface</span><span class="p">,</span> <span class="p">[</span><span class="mi">18</span><span class="p">,</span> <span class="mi">11</span><span class="p">])</span>
<span class="k">elif</span> <span class="n">mode</span><span class="o">==</span><span class="s1">'gameTimer'</span><span class="p">:</span>
<span class="c1"># The text</span>
<span class="n">fps_string</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%.2f</span><span class="s2">"</span> <span class="o">%</span> <span class="n">numeric_value</span>
<span class="n">txt_surface</span> <span class="o">=</span> <span class="n">font_object</span><span class="o">.</span><span class="n">render</span><span class="p">(</span><span class="n">fps_string</span><span class="p">,</span> <span class="kc">True</span><span class="p">,</span> <span class="n">THECOLORS</span><span class="p">[</span><span class="s2">"white"</span><span class="p">])</span>
<span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="o">.</span><span class="n">blit</span><span class="p">(</span><span class="n">txt_surface</span><span class="p">,</span> <span class="p">[</span><span class="mi">600</span><span class="p">,</span> <span class="mi">11</span><span class="p">])</span>
<span class="c1">#============================================================</span>
<span class="c1"># Main procedural script.</span>
<span class="c1">#============================================================</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="c1"># A few globals.</span>
<span class="k">global</span> <span class="n">env</span><span class="p">,</span> <span class="n">game_window</span><span class="p">,</span> <span class="n">v_sb</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">init</span><span class="p">()</span>
<span class="n">myclock</span> <span class="o">=</span> <span class="n">pygame</span><span class="o">.</span><span class="n">time</span><span class="o">.</span><span class="n">Clock</span><span class="p">()</span>
<span class="n">window_dimensions_px</span> <span class="o">=</span> <span class="p">(</span><span class="mi">800</span><span class="p">,</span> <span class="mi">700</span><span class="p">)</span> <span class="c1">#window_width_px, window_height_px</span>
<span class="c1"># Create the first user/client and the methods for moving between the screen and the world.</span>
<span class="n">env</span> <span class="o">=</span> <span class="n">Environment</span><span class="p">(</span><span class="n">window_dimensions_px</span><span class="p">,</span> <span class="mf">10.0</span><span class="p">)</span> <span class="c1"># 10m in along the x axis.</span>
<span class="n">game_window</span> <span class="o">=</span> <span class="n">GameWindow</span><span class="p">(</span><span class="n">window_dimensions_px</span><span class="p">,</span> <span class="s1">'Vector Sandbox V.1'</span><span class="p">)</span>
<span class="c1"># Define the Left, Right, Bottom, and Top boundaries of the game window.</span>
<span class="n">v_sb</span> <span class="o">=</span> <span class="n">VectorSandbox</span><span class="p">({</span><span class="s2">"L_m"</span><span class="p">:</span><span class="mf">0.0</span><span class="p">,</span> <span class="s2">"R_m"</span><span class="p">:</span><span class="n">game_window</span><span class="o">.</span><span class="n">UR_2d_m</span><span class="o">.</span><span class="n">x</span><span class="p">,</span> <span class="s2">"B_m"</span><span class="p">:</span><span class="mf">0.0</span><span class="p">,</span> <span class="s2">"T_m"</span><span class="p">:</span><span class="n">game_window</span><span class="o">.</span><span class="n">UR_2d_m</span><span class="o">.</span><span class="n">y</span><span class="p">})</span>
<span class="c1"># Add some vectors to the table.</span>
<span class="n">demo_mode</span> <span class="o">=</span> <span class="mi">1</span>
<span class="n">make_some_vectors</span><span class="p">(</span> <span class="n">demo_mode</span><span class="p">)</span>
<span class="c1"># Font object for rendering text onto display surface.</span>
<span class="n">fnt_FPS</span> <span class="o">=</span> <span class="n">pygame</span><span class="o">.</span><span class="n">font</span><span class="o">.</span><span class="n">SysFont</span><span class="p">(</span><span class="s2">"Arial"</span><span class="p">,</span> <span class="mi">14</span><span class="p">)</span>
<span class="n">fnt_gameTimer</span> <span class="o">=</span> <span class="n">pygame</span><span class="o">.</span><span class="n">font</span><span class="o">.</span><span class="n">SysFont</span><span class="p">(</span><span class="s2">"Arial"</span><span class="p">,</span> <span class="mi">60</span><span class="p">)</span>
<span class="c1"># Limit the framerate, but let it float below this limit.</span>
<span class="n">framerate_limit</span> <span class="o">=</span> <span class="mf">480.0</span> <span class="c1"># 480</span>
<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
<span class="n">env</span><span class="o">.</span><span class="n">dt_s</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">myclock</span><span class="o">.</span><span class="n">tick</span><span class="p">(</span> <span class="n">framerate_limit</span><span class="p">)</span> <span class="o">*</span> <span class="mf">1e-3</span><span class="p">)</span>
<span class="c1"># Listen to the user: establish the state of the keyboard and mouse and determine if a new demo is called for.</span>
<span class="n">resetmode</span> <span class="o">=</span> <span class="n">env</span><span class="o">.</span><span class="n">get_user_input</span><span class="p">()</span>
<span class="c1"># Reset the game based on local user control.</span>
<span class="k">if</span> <span class="n">resetmode</span> <span class="ow">in</span> <span class="p">[</span><span class="s2">"1p"</span><span class="p">,</span><span class="s2">"2p"</span><span class="p">,</span><span class="s2">"3p"</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">,</span><span class="mi">4</span><span class="p">,</span><span class="mi">5</span><span class="p">,</span><span class="mi">6</span><span class="p">,</span><span class="mi">7</span><span class="p">,</span><span class="mi">8</span><span class="p">,</span><span class="mi">9</span><span class="p">,</span><span class="mi">0</span><span class="p">]:</span>
<span class="n">demo_mode</span> <span class="o">=</span> <span class="n">resetmode</span>
<span class="nb">print</span> <span class="n">resetmode</span>
<span class="c1"># Delete all the objects in the sandbox. Cleaning out these list reference to these objects effectively</span>
<span class="c1"># deletes the objects.</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">=</span> <span class="kc">None</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span> <span class="o">=</span> <span class="p">[]</span>
<span class="c1"># Now just black out the screen.</span>
<span class="n">game_window</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="c1"># Reinitialize the demo.</span>
<span class="n">make_some_vectors</span><span class="p">(</span> <span class="n">demo_mode</span><span class="p">)</span>
<span class="c1"># Control vector selection and mouse related movement.</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">updateSelectedVector</span><span class="p">()</span>
<span class="c1"># Control the zoom</span>
<span class="n">env</span><span class="o">.</span><span class="n">control_zoom_and_view</span><span class="p">()</span>
<span class="c1"># Erase the blackboard.</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">env</span><span class="o">.</span><span class="n">inhibit_screen_clears</span><span class="p">:</span>
<span class="n">game_window</span><span class="o">.</span><span class="n">surface</span><span class="o">.</span><span class="n">fill</span><span class="p">((</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">))</span>
<span class="c1"># Display FPS text.</span>
<span class="n">display_number</span><span class="p">(</span><span class="mi">1</span><span class="o">/</span><span class="n">env</span><span class="o">.</span><span class="n">dt_s</span><span class="p">,</span> <span class="n">fnt_FPS</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="s1">'FPS'</span><span class="p">)</span>
<span class="c1"># Draw axis for the vector sandbox.</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="c1"># Draw vectors.</span>
<span class="k">if</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span> <span class="o">!=</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">total_vector_2d_m</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="k">for</span> <span class="n">eachvector</span> <span class="ow">in</span> <span class="n">v_sb</span><span class="o">.</span><span class="n">vectors</span><span class="p">:</span>
<span class="n">eachvector</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="n">pygame</span><span class="o">.</span><span class="n">display</span><span class="o">.</span><span class="n">flip</span><span class="p">()</span>
<span class="n">v_sb</span><span class="o">.</span><span class="n">tail_time_s</span> <span class="o">+=</span> <span class="n">env</span><span class="o">.</span><span class="n">dt_s</span>
<span class="c1">#============================================================</span>
<span class="c1"># Run the main program. </span>
<span class="c1">#============================================================</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
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