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<li class="navelem"><a class="el" href="dir_c70994b0d9919a11b368e677cb7f323c.html">IGraphics</a></li> </ul>
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<div class="headertitle"><div class="title">IGraphicsUtilities.h</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> ==============================================================================</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"></span> </div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> This file is part of the iPlug 2 library. Copyright (C) the iPlug 2 developers.</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"></span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> See LICENSE.txt for more info.</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"></span> </div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> ==============================================================================</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">*/</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span> </div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#pragma once</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include "<a class="code" href="_i_plug_constants_8h.html">IPlugConstants.h</a>"</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include "IGraphicsConstants.h"</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include <cmath></span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span>BEGIN_IPLUG_NAMESPACE</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span>BEGIN_IGRAPHICS_NAMESPACE</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="comment">// these are macros to shorten the instantiation of IControls</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="comment">// for a paramater ID MyParam, define constants named MyParam_X, MyParam_Y, MyParam_W, MyParam_H to specify the Control's IRect</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="comment">// then when instantiating a Control you can just call MakeIRect(MyParam) to specify the IRect</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#define MakeIRect(a) IRECT(a##_X, a##_Y, a##_X + a##_W, a##_Y + a##_H)</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#define MakeIRectHOffset(a, xoffs) IRECT(a##_X + xoffs, a##_Y, a##_X + a##_W + xoffs, a##_Y + a##_H)</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#define MakeIRectVOffset(a, yoffs) IRECT(a##_X, a##_Y + yoffs, a##_X + a##_W, a##_Y + a##_H + yoffs)</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#define MakeIRectHVOffset(a, xoffs, yoffs) IRECT(a##_X + xoffs, a##_Y + yoffs, a##_X + a##_W + xoffs, a##_Y + a##_H + yoffs)</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">static</span> <span class="keywordtype">double</span> GetTimestamp()</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span>{</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">static</span> <span class="keyword">auto</span> start = std::chrono::steady_clock::now();</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keywordflow">return</span> std::chrono::duration<double>(std::chrono::steady_clock::now() - start).count();</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span>}</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="keyword">inline</span> T DegToRad(T degrees)</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span>{</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>T<span class="keyword">></span>(iplug::PI) * (degrees / <span class="keyword">static_cast<</span>T<span class="keyword">></span>(180.0));</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span>}</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span><span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="keyword">inline</span> T RadToDeg(T radians)</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span>{</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">return</span> radians / <span class="keyword">static_cast<</span>T<span class="keyword">></span>(iplug::PI) * <span class="keyword">static_cast<</span>T<span class="keyword">></span>(180.0);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span>}</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span><span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> RadialPoints(<span class="keywordtype">float</span> angleDegrees, <span class="keywordtype">float</span> cx, <span class="keywordtype">float</span> cy, <span class="keywordtype">float</span> rMin, <span class="keywordtype">float</span> rMax, <span class="keywordtype">int</span> nPoints, <span class="keywordtype">float</span> data[][2])</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span>{</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">const</span> <span class="keywordtype">float</span> angleRadians = DegToRad(angleDegrees - 90.f);</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keyword">const</span> <span class="keywordtype">float</span> sinV = std::sin(angleRadians);</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keyword">const</span> <span class="keywordtype">float</span> cosV = std::cos(angleRadians);</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">for</span>(<span class="keyword">auto</span> i = 0; i < nPoints; i++)</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">const</span> <span class="keywordtype">float</span> r = rMin+(rMax-rMin) * (<span class="keywordtype">float</span>) i / float (nPoints-1);</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> data[i][0] = (cx + r * cosV);</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> data[i][1] = (cy + r * sinV);</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> }</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span>}</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span><span class="comment">// Return the intersection of line(p0, p1) with line(p2, p3) as a fraction of the distance along (p2, p3).</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span><span class="keyword">static</span> <span class="keywordtype">float</span> GetLineCrossing(<a class="code hl_struct" href="struct_i_vec2.html">IVec2</a> p0, <a class="code hl_struct" href="struct_i_vec2.html">IVec2</a> p1, <a class="code hl_struct" href="struct_i_vec2.html">IVec2</a> p2, <a class="code hl_struct" href="struct_i_vec2.html">IVec2</a> p3)</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span>{</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">auto</span> b = p2 - p0;</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keyword">auto</span> d = p1 - p0;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keyword">auto</span> e = p3 - p2;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordtype">float</span> m = d.x * e.y - d.y * e.x;</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordtype">float</span> epsilon = 1e-8f;</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">if</span> (std::abs(m) < epsilon)</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">return</span> NAN;</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">return</span> -(d.x * b.y - d.y * b.x) / m;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span>}</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span>END_IGRAPHICS_NAMESPACE</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span>END_IPLUG_NAMESPACE</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="ttc" id="a_i_plug_constants_8h_html"><div class="ttname"><a href="_i_plug_constants_8h.html">IPlugConstants.h</a></div><div class="ttdoc">IPlug Constant definitions, Types, magic numbers.</div></div>
<div class="ttc" id="astruct_i_vec2_html"><div class="ttname"><a href="struct_i_vec2.html">IVec2</a></div><div class="ttdoc">Encapsulate an xy point in one struct.</div><div class="ttdef"><b>Definition:</b> <a href="_i_graphics_private_8h_source.html#l00626">IGraphicsPrivate.h:627</a></div></div>
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