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A16c_2D_B2D_serverN.txt
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A16c_2D_B2D_serverN.txt
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# Filename: A16c_2D_B2D_serverN.py
# Written by: James D. Miller
# 5:31 PM Sat May 18, 2019
import sys, os
import pygame
import datetime
import math
import time
import commands, platform
import inspect
# PyGame Constants
from pygame.locals import *
from pygame.color import THECOLORS
# PyGame gui
from pgu import gui
# Import the vector class from a local module (in this same directory)
from vec2d_jdm import Vec2D
# Networking
from PodSixNet.Server import Server
from PodSixNet.Channel import Channel
import socket
# Box2D
from Box2D import *
# Argument parsing...
import argparse
#=====================================================================
# Classes
#=====================================================================
class ClientChannel(Channel):
def __init__(self, *args, **kwargs):
Channel.__init__(self, *args, **kwargs)
# def Network(self, data):
# #print "Client State Dictionary:", data
# #print "Network, data['ID']", data['ID']
# pass
def Network_CN(self, data):
#global env
# Store incoming data in the client objects.
speaking_client_name = 'C' + str(data['ID'])
# Check to make sure that this client is still in the client dictionary.
if speaking_client_name in env.clients:
# Mouse controls.
env.clients[speaking_client_name].cursor_location_px = data['mXY'] # mouse x,y
env.clients[speaking_client_name].buttonIsStillDown = data['mBd'] # mouse button down (true/false)
env.clients[speaking_client_name].mouse_button = data['mB'] # mouse button number (1,2,3,0)
# Jet controls.
# Make the s key behave as a toggle.
# If key is up, make it ready to accept the down ('D') event.
if (data['s'] == 'U'):
env.clients[speaking_client_name].key_s_onoff = 'ON'
env.clients[speaking_client_name].key_s = data['s']
# If getting 'D' from network client and the key is enabled.
elif (env.clients[speaking_client_name].key_s_onoff == 'ON'):
env.clients[speaking_client_name].key_s = data['s']
env.clients[speaking_client_name].key_a = data['a']
env.clients[speaking_client_name].key_d = data['d']
env.clients[speaking_client_name].key_w = data['w']
# Control for stopping all objects (f for freeze).
env.clients[speaking_client_name].key_f = data['f']
# Gun controls.
# Make the k key behave as a toggle.
# If key is up, make it ready to accept the down ('D') event.
if (data['k'] == 'U'):
env.clients[speaking_client_name].key_k_onoff = 'ON'
env.clients[speaking_client_name].key_k = data['k']
# If getting 'D' from network client and the key is enabled.
elif (env.clients[speaking_client_name].key_k_onoff == 'ON'):
env.clients[speaking_client_name].key_k = data['k']
env.clients[speaking_client_name].key_j = data['j']
env.clients[speaking_client_name].key_l = data['l']
env.clients[speaking_client_name].key_i = data['i']
env.clients[speaking_client_name].key_space = data[' ']
# Cursor controls.
env.clients[speaking_client_name].key_lshift = data['ls']
env.clients[speaking_client_name].key_t = data['t']
# Keep track of client activity...
env.clients[speaking_client_name].sendCount += 1
def Close(self):
print "A network client game pad has been closed."
class GameServer(Server):
channelClass = ClientChannel
def __init__(self, *args, **kwargs):
Server.__init__(self, *args, **kwargs)
self.client_count = 0
# This runs when each client connects.
def Connected(self, channel, addr):
#print 'new connection (channel, addr):', channel, addr
self.client_count += 1
if (self.client_count <= 10):
channel.Send({"action": "hello", "P_ID":self.client_count})
client_name = 'C' + str(self.client_count)
# Make a client and put it in the clients list.
env.clients[client_name] = Client(env.client_colors[client_name])
# Add the channel as an attribute of the client. Use this to Send to this client.
env.clients[client_name].channel = channel
else:
channel.Send({"action": "hello", "P_ID":0})
print "self.client_count =", self.client_count
class Client:
def __init__(self, cursor_color):
self.cursor_location_px = (0,0) # x_px, y_px
self.mouse_button = 1 # 1, 2, or 3
self.buttonIsStillDown = False
self.channel = 0
# Jet
self.key_a = "U"
self.key_s = "U"
self.key_s_onoff = "ON"
self.key_d = "U"
self.key_w = "U"
# Gun
self.key_j = "U"
self.key_k = "U"
self.key_k_onoff = "ON"
self.key_l = "U"
self.key_i = "U"
self.key_space = "U"
# Freeze it
self.key_f = "U"
# Zoom
self.key_b = "U"
self.key_n = "U"
self.key_m = "U"
self.key_h = "U"
self.key_lctrl = 'U'
# Cursor selection modification #b2d
self.key_lshift = "U"
self.key_t = "U"
self.selected_puck = None
self.COM_selection = None
self.selection_pointOnPuck_b2d_m = b2Vec2(0,0) #b2d
self.cursor_color = cursor_color
self.bullet_hit_count = 0
self.bullet_hit_limit = 50.0
self.previousSendCount = 0
self.sendCount = 0
self.active = False
# Define the nature of the cursor strings, one for each mouse button.
self.mouse_strings = {'string1':{'c_drag': 2.0, 'k_Npm': 60.0},
'string2':{'c_drag': 0.1, 'k_Npm': 2.0},
'string3':{'c_drag': 20.0, 'k_Npm': 1000.0}}
# self.mouse_strings = {'string1':{'c_drag': 0.0, 'k_Npm': 60.0},
# 'string2':{'c_drag': 0.0, 'k_Npm': 2.0},
# 'string3':{'c_drag': 0.0, 'k_Npm': 1000.0}}
# Special case for objects selected at nonCOM points. c_rot can control the drag (torque)
# associated with rotation. c_pnt_drag is applied to a selected object at the local body point of the
# cursor-selected object.
self.mouse_strings_nonCOM = {'string1':{'c_drag': 0.0, 'c_pnt_drag': 2.0, 'c_rot': 0.0, 'k_Npm': 60.0},
'string2':{'c_drag': 0.0, 'c_pnt_drag': 0.1, 'c_rot': 0.0, 'k_Npm': 2.0},
'string3':{'c_drag': 0.0, 'c_pnt_drag': 20.0, 'c_rot': 0.0, 'k_Npm': 1000.0}}
def calc_string_forces_on_pucks(self):
# Calculated the string forces on the selected puck and add to the aggregate
# that is stored in the puck object.
# First deal with selecting and unselecting.
# Only check for a selected puck if one isn't already selected. This keeps
# the puck from unselecting if cursor is dragged off the puck!
if (self.selected_puck == None):
if self.buttonIsStillDown:
# Depending on whether the shift key is down or not, do a COM based selection
# or use box2d to select the object at a particular point on it. #b2d
if (self.key_lshift == 'D'):
self.COM_selection = False
temp = air_table.checkForPuckAtThisPosition_b2d(self.cursor_location_px)
self.selected_puck = temp['puck']
self.selection_pointOnPuck_b2d_m = temp['b2d_xy_m']
else:
# COM selection
self.COM_selection = True
self.selected_puck = air_table.checkForPuckAtThisPosition(self.cursor_location_px)
self.selection_pointOnPuck_b2d_m = b2Vec2(0,0)
# If a puck is already selected, unselect it if the mouse button is up.
else:
if not self.buttonIsStillDown:
# Unselect the puck and bomb out of here.
#self.selected_puck.selected = False
self.selected_puck = None
self.COM_selection = None
self.selection_2d_m = Vec2D(0,0)
return None
# Now calculate the forces on a selected puck.
if (self.selected_puck != None):
# Calculate the absolute World position of the selection point. Can't just add the local vector to
# the center of mass vector. Would have to know the orientation (rotation) of the local coordinate system.
# So use box2d do that transform for us. #b2d
selection_b2d_m = self.selected_puck.b2d_body.GetWorldPoint( self.selection_pointOnPuck_b2d_m)
# body.GetWorldVector(localVector)
self.selection_2d_m = Vec2D( selection_b2d_m.x, selection_b2d_m.y)
# Use dx difference to calculate the hooks law force being applied by the tether line.
# If you release the mouse button after a drag it will fling the puck.
# This tether force will diminish as the puck gets closer to the mouse point.
stringName = "string" + str(self.mouse_button)
# Limit the acceleration caused by the cursor string if the targeted object is very small (light).
# Do this with a scaling factor based on the mass of the selected object. This avoids instability
# in the physics engines that can be caused by large changes in position/velocity in a time step.
if ((self.mouse_strings_nonCOM[stringName]['k_Npm'] / self.selected_puck.mass_kg) > 10000.0):
cursor_scaling_factor = 3.0 * self.selected_puck.mass_kg
else:
cursor_scaling_factor = 1
# Calculation and aggregation of the cursor forces.
if self.COM_selection:
# Spring force
dx_2d_m = env.ConvertScreenToWorld(Vec2D(self.cursor_location_px)) - self.selected_puck.pos_2d_m
spring_force_2d_N = dx_2d_m * self.mouse_strings[stringName]['k_Npm'] * cursor_scaling_factor
self.selected_puck.cursorString_spring_force_2d_N += spring_force_2d_N
# Calculate the drag and then add to the pucks aggregate drag force.
drag_force_2d_N = (self.selected_puck.vel_2d_mps * -1 * self.mouse_strings[stringName]['c_drag']) * cursor_scaling_factor
self.selected_puck.cursorString_puckDrag_force_2d_N += drag_force_2d_N
else:
# NonCOM selection:
# Spring
dx_2d_m = env.ConvertScreenToWorld(Vec2D(self.cursor_location_px)) - self.selection_2d_m
# Spring force
spring_force_2d_N = dx_2d_m * self.mouse_strings_nonCOM[stringName]['k_Npm'] * cursor_scaling_factor
# Append, this force and the location it is to be applied on the body, to the list on the puck. #b2d
self.selected_puck.nonCOM_N.append({'force_2d_N': spring_force_2d_N,'local_b2d_m': self.selection_pointOnPuck_b2d_m})
# Calculate a drag force based on the velocity of the selected point. Apply this drag to the selected point on the body.
v_selected_pnt_b2d_mps = self.selected_puck.b2d_body.GetLinearVelocityFromLocalPoint( self.selection_pointOnPuck_b2d_m)
#print "vel of selected point:", v_selected_pnt_b2d_mps
v_selected_pnt_2d_mps = Vec2D(v_selected_pnt_b2d_mps.x, v_selected_pnt_b2d_mps.y)
point_drag_2d_N = v_selected_pnt_2d_mps * (-1) * self.mouse_strings_nonCOM[stringName]['c_pnt_drag'] * cursor_scaling_factor
self.selected_puck.nonCOM_N.append({'force_2d_N':point_drag_2d_N, 'local_b2d_m':self.selection_pointOnPuck_b2d_m})
# Calculate a drag force based on COM velocity and then add to the pucks aggregate drag force.
drag_force_2d_N = (self.selected_puck.vel_2d_mps * -1 * self.mouse_strings_nonCOM[stringName]['c_drag'])* cursor_scaling_factor
self.selected_puck.cursorString_puckDrag_force_2d_N += drag_force_2d_N
# Calculate the drag torque...
torque_force_N = -1 * self.selected_puck.rotation_speed * self.mouse_strings_nonCOM[stringName]['c_rot'] * cursor_scaling_factor
self.selected_puck.cursorString_torque_force_Nm += torque_force_N
# Some torque to spin the objects.
if (self.key_t == 'D'):
if (self.selected_puck.b2d_body.angularVelocity < 200.0):
if (self.key_lshift == 'D'):
spin_direction = +1.0
else:
spin_direction = -1.0
self.selected_puck.cursorString_torque_force_Nm = 10.0 * self.selected_puck.mass_kg * spin_direction
def draw_cursor_string(self):
if self.COM_selection:
selection_location_2d_m = self.selected_puck.pos_2d_m
else:
selection_location_2d_m = self.selection_2d_m
line_points = [env.ConvertWorldToScreen( selection_location_2d_m), self.cursor_location_px]
if (self.selected_puck != None):
pygame.draw.line(game_window.surface, self.cursor_color, line_points[0], line_points[1], 1)
# Draw small circle at selection point.
radius_px = 2
pygame.draw.circle(game_window.surface, THECOLORS["red"], line_points[0], radius_px, 0)
def draw_fancy_server_cursor(self):
self.draw_server_cursor( self.cursor_color, 0)
self.draw_server_cursor( THECOLORS["black"], 1)
def draw_server_cursor(self, color, edge_px):
cursor_outline_vertices = []
cursor_outline_vertices.append( self.cursor_location_px )
cursor_outline_vertices.append( (self.cursor_location_px[0] + 10, self.cursor_location_px[1] + 10) )
cursor_outline_vertices.append( (self.cursor_location_px[0] + 0, self.cursor_location_px[1] + 15) )
pygame.draw.polygon(game_window.surface, color, cursor_outline_vertices, edge_px)
class runningAvg:
def __init__(self, n_target):
self.n_target = n_target
self.reset()
def update(self, new_value):
if self.n_in_avg < self.n_target:
self.total += new_value
self.n_in_avg += 1
else:
# Add the new value and subtract the oldest.
self.total += new_value - self.values[0]
# Discard the oldest value.
self.values.pop(0)
self.values.append(new_value)
self.result = self.total / float(self.n_in_avg)
return self.result
def reset(self):
self.n_in_avg = 0
self.result = 0.0
self.values = []
self.total = 0.0
class Puck:
def __init__(self, pos_2d_m, radius_m, density_kgpm2, puck_color=THECOLORS["grey"], coef_rest=0.85, CR_fixed=False,
pinned=False, rect_fixture=False, aspect_ratio=1.0):
self.radius_m = radius_m
self.radius_px = int(round(env.px_from_m(self.radius_m * env.viewZoom)))
self.density_kgpm2 = density_kgpm2 # mass per unit area
self.mass_kg = self.density_kgpm2 * math.pi * self.radius_m ** 2
self.coef_rest = coef_rest
self.CR_fixed = CR_fixed
self.pos_2d_m = pos_2d_m
self.vel_2d_mps = Vec2D(0.0,0.0)
self.rotation_speed = 0.0
self.SprDamp_force_2d_N = Vec2D(0.0,0.0)
self.jet_force_2d_N = Vec2D(0.0,0.0)
self.cursorString_spring_force_2d_N = Vec2D(0.0,0.0)
self.cursorString_puckDrag_force_2d_N = Vec2D(0.0,0.0)
self.cursorString_torque_force_Nm = 0
# Non-center of mass (COM). #b2d
# This is a list of dictionaries: each dictionary contains a force and a body location
self.nonCOM_N = []
self.impulse_2d_Ns = Vec2D(0.0,0.0)
#self.selected = False
self.color = puck_color
self.client_name = None
self.jet = None
self.gun = None
self.hit = False
self.hitflash_duration_timer_s = 0.0
# Make the hit flash persist for this number of seconds:
self.hitflash_duration_timer_limit_s = 0.05
# Bullet data...
self.bullet = False
self.birth_time_s = env.time_s
self.age_limit_s = 3.0
# Create a Box2d puck.
self.aspect_ratio = aspect_ratio
self.rect_fixture = rect_fixture
if (not pinned):
self.b2d_body = self.create_Box2d_Puck()
# If you print an object instance...
def __str__(self):
return "puck: x is %s, y is %s" % (self.pos_2d_m.x, self.pos_2d_m.y)
# Box2d
def create_Box2d_Puck(self):
# Create a dynamic body
dynamic_body = b2_world.CreateDynamicBody(position=b2Vec2(self.pos_2d_m.tuple()), angle=0,
linearVelocity=b2Vec2(self.vel_2d_mps.tuple()))
# Surface friction
coef_friction = air_table.coef_friction_puck
if self.rect_fixture:
# And add a box fixture onto it.
dynamic_body.CreatePolygonFixture(box=(self.radius_m, self.radius_m * self.aspect_ratio), density=self.density_kgpm2,
friction=coef_friction, restitution=self.coef_rest)
# Set the mass attribute based on what box2d calculates.
self.mass_kg = dynamic_body.mass
else:
# And add a circle fixture onto it.
dynamic_body.CreateCircleFixture(radius=self.radius_m , density=self.density_kgpm2,
friction=coef_friction, restitution=self.coef_rest)
# Some fluid drag inside the Box2D engine.
dynamic_body.linearDamping = 0.0 #0.6
dynamic_body.angularDamping = 0.0 #0.6
#print "box2d", dynamic_body.mass, dynamic_body.fixtures[0].restitution
return dynamic_body
# Box2d
def get_Box2d_XandV(self):
# Position
box2d_pos_2d_m = self.b2d_body.GetWorldPoint(b2Vec2(0,0))
self.pos_2d_m = Vec2D( box2d_pos_2d_m.x, box2d_pos_2d_m.y)
# Velocity
box2d_vel_2d_m = self.b2d_body.linearVelocity
self.vel_2d_mps = Vec2D( box2d_vel_2d_m.x, box2d_vel_2d_m.y)
# Rotational speed.
self.rotation_speed = self.b2d_body.angularVelocity
#print self.rotation_speed
def draw(self):
# Convert x,y to pixel screen location and then draw.
self.pos_2d_px = env.ConvertWorldToScreen( self.pos_2d_m)
#print "draw position", self.pos_px[0], self.pos_px[1]
# Update based on zoom factor
self.radius_px = int(round(env.px_from_m( self.radius_m)))
if (self.radius_px < 3):
self.radius_px = 3
# Just after a hit, fill the whole circle with RED (i.e., thickness = 0).
if self.hit:
puck_circle_thickness = 0
puck_color = THECOLORS["red"]
self.hitflash_duration_timer_s += dt_render_s
if self.hitflash_duration_timer_s > self.hitflash_duration_timer_limit_s:
self.hit = False
else:
puck_circle_thickness = 3
puck_color = self.color
if self.rect_fixture:
# Box2d
fixture_shape = self.b2d_body.fixtures[0].shape
vertices_screen_2d_px = []
for vertex_object_2d_m in fixture_shape.vertices:
vertex_world_2d_m = self.b2d_body.transform * vertex_object_2d_m # Overload operation
vertex_screen_2d_px = env.ConvertWorldToScreen( Vec2D(vertex_world_2d_m.x, vertex_world_2d_m.y)) # This returns a tuple
vertices_screen_2d_px.append( vertex_screen_2d_px) # Append to the list.
pygame.draw.polygon(game_window.surface, puck_color, vertices_screen_2d_px, puck_circle_thickness)
else:
# Draw main puck body.
pygame.draw.circle(game_window.surface, puck_color, self.pos_2d_px, self.radius_px, puck_circle_thickness)
# If it's not a bullet and not a rectangle, dray a line on the puck to indicate rotational orientation.
if ((self.bullet == False) and (self.rect_fixture==False)):
point_on_radius_b2d_m = self.b2d_body.GetWorldPoint( b2Vec2(0.0, self.radius_m))
point_on_radius_2d_m = Vec2D( point_on_radius_b2d_m.x, point_on_radius_b2d_m.y)
point_on_radius_2d_px = env.ConvertWorldToScreen( point_on_radius_2d_m)
point_at_center_b2d_m = self.b2d_body.GetWorldPoint( b2Vec2(0.0, 0.0))
point_at_center_2d_m = Vec2D( point_at_center_b2d_m.x, point_at_center_b2d_m.y)
point_at_center_2d_px = env.ConvertWorldToScreen( point_at_center_2d_m)
pygame.draw.line(game_window.surface, puck_color, point_on_radius_2d_px, point_at_center_2d_px, 2)
# Draw life (poor health) indicator circle.
if (((self.client_name != None) and env.clients[self.client_name].active) or (self.client_name == 'test')) and (not self.bullet):
spent_fraction = float(env.clients[self.client_name].bullet_hit_count) / float(env.clients[self.client_name].bullet_hit_limit)
life_radius = spent_fraction * self.radius_px
if (life_radius > 2.0):
life_radius_px = int(round(life_radius))
else:
life_radius_px = 2
pygame.draw.circle(game_window.surface, THECOLORS["red"], self.pos_2d_px, life_radius_px, 1)
class RotatingTube:
def __init__(self, puck):
# Associate the tube with the puck.
self.puck = puck
self.color = env.clients[self.puck.client_name].cursor_color
# Degrees of rotation per second.
#self.rotation_rate_dps = 360.0
# Scaling factors to manage the aspect ratio of the tube.
self.sf_x = 0.15
self.sf_y = 0.50
# Notice the counter-clockwise drawing pattern. Four vertices for a rectangle.
# Each vertex is represented by a vector.
self.tube_vertices_2d_m = [Vec2D(-0.50 * self.sf_x, 0.00 * self.sf_y),
Vec2D( 0.50 * self.sf_x, 0.00 * self.sf_y),
Vec2D( 0.50 * self.sf_x, 1.00 * self.sf_y),
Vec2D(-0.50 * self.sf_x, 1.00 * self.sf_y)]
# Define a normal (1 meter) pointing vector to keep track of the direction of the jet.
self.direction_2d_m = Vec2D(0.0, 1.0)
def rotate_vertices(self, vertices_2d_m, angle_deg):
# Put modified vectors in a new list.
rotated_vertices_2d_m = []
for vertex_2d_m in vertices_2d_m:
rotated_vertices_2d_m.append( vertex_2d_m.rotated( angle_deg))
return rotated_vertices_2d_m
def rotate_everything(self, angle_deg):
# Rotate the pointer.
self.direction_2d_m = self.direction_2d_m.rotated( angle_deg)
# Rotate the tube.
self.tube_vertices_2d_m = self.rotate_vertices( self.tube_vertices_2d_m, angle_deg)
def convert_from_world_to_screen(self, vertices_2d_m, base_point_2d_m):
vertices_2d_px = []
for vertex_2d_m in vertices_2d_m:
# Calculate absolute position of this vertex.
vertices_2d_px.append( env.ConvertWorldToScreen( vertex_2d_m + base_point_2d_m))
return vertices_2d_px
def draw_tube(self, line_thickness=3):
# Draw the tube on the game-window surface. Establish the base_point as the center of the puck.
pygame.draw.polygon(game_window.surface, self.color,
self.convert_from_world_to_screen(self.tube_vertices_2d_m, self.puck.pos_2d_m), line_thickness)
class Jet( RotatingTube):
def __init__(self, puck):
RotatingTube.__init__(self, puck)
# Degrees of rotation per second.
self.rotation_rate_dps = 360.0
self.color = THECOLORS["yellow"]
# The jet flame (triangle)
self.flame_vertices_2d_m =[Vec2D(-0.50 * self.sf_x, 1.02 * self.sf_y),
Vec2D( 0.50 * self.sf_x, 1.02 * self.sf_y),
Vec2D(-0.00 * self.sf_x, 1.80 * self.sf_y)]
# Scaler magnitude of jet force.
self.jet_force_N = 1.3 * self.puck.mass_kg * abs(air_table.gON_2d_mps2.y)
# Point everything down for starters.
self.rotate_everything( 180)
def turn_jet_forces_onoff(self, client_name):
if (env.clients[client_name].key_w == "D"):
# Force on puck is in the opposite direction of the jet tube.
self.puck.jet_force_2d_N = self.direction_2d_m * (-1) * self.jet_force_N
else:
self.puck.jet_force_2d_N = self.direction_2d_m * 0.0
def client_rotation_control(self, client_name):
if (env.clients[client_name].key_a == "D"):
self.rotate_everything( +1 * self.rotation_rate_dps * dt_render_s)
if (env.clients[client_name].key_d == "D"):
self.rotate_everything( -1 * self.rotation_rate_dps * dt_render_s)
if (env.clients[client_name].key_s == "D"):
# Rotate jet tube to be in the same direction as the motion of the puck.
puck_velocity_angle = self.puck.vel_2d_mps.get_angle()
current_jet_angle = self.direction_2d_m.get_angle()
self.rotate_everything(puck_velocity_angle - current_jet_angle)
#self.rotate_everything(180)
# Reset this so it doesn't keep flipping. Just want it to flip the
# direction once but not keep flipping.
# This first line is enough to keep the local client from flipping again because
# the local keyboard doesn't keep sending the "D" event if the key is held down.
env.clients[client_name].key_s = "U"
# This second one is also needed for the network clients because they keep
# sending the "D" until they release the key.
env.clients[client_name].key_s_onoff = "OFF"
def rotate_everything(self, angle_deg):
# Rotate the pointer.
self.direction_2d_m = self.direction_2d_m.rotated( angle_deg)
# Rotate the tube.
self.tube_vertices_2d_m = self.rotate_vertices( self.tube_vertices_2d_m, angle_deg)
# Rotate the flame.
self.flame_vertices_2d_m = self.rotate_vertices( self.flame_vertices_2d_m, angle_deg)
def draw(self):
# Draw the jet tube.
self.draw_tube()
# Draw the red flame.
if (env.clients[self.puck.client_name].key_w == "D"):
pygame.draw.polygon(game_window.surface, THECOLORS["red"],
self.convert_from_world_to_screen(self.flame_vertices_2d_m, self.puck.pos_2d_m), 0)
class Gun( RotatingTube):
def __init__(self, puck):
RotatingTube.__init__(self, puck)
# Degrees of rotation per second.
self.rotation_rate_dps = 180.0
self.color = env.clients[self.puck.client_name].cursor_color
# Run this method of the RotationTube class to set the initial angle of each new gun.
self.rotate_everything( 45)
self.bullet_speed_mps = 5.0
self.fire_time_s = env.time_s
self.firing_delay_s = 0.1
self.bullet_count = 0
self.bullet_count_limit = 10
self.gun_recharge_wait_s = 2.5
self.gun_recharge_start_time_s = env.time_s
self.gun_recharging = False
self.testing_gun = False
self.shield = False
self.shield_hit = False
self.shield_hit_duration_s = 0.0
# Make the hit remove the shield for this number of seconds:
self.shield_hit_duration_limit_s = 0.05
self.shield_hit_count = 0
self.shield_hit_count_limit = 20
self.shield_recharging = False
self.shield_recharge_wait_s = 4.0
self.shield_recharge_start_time_s = env.time_s
def client_rotation_control(self, client_name):
if (env.clients[client_name].key_j == "D"):
self.rotate_everything( +self.rotation_rate_dps * dt_render_s)
if (env.clients[client_name].key_l == "D"):
self.rotate_everything( -self.rotation_rate_dps * dt_render_s)
if (env.clients[client_name].key_k == "D"):
# Rotate jet tube to be in the same direction as the motion of the puck.
puck_velocity_angle = self.puck.vel_2d_mps.get_angle()
current_gun_angle = self.direction_2d_m.get_angle()
self.rotate_everything(puck_velocity_angle - current_gun_angle)
# Reset this so it doesn't keep flipping. Just want it to flip the
# direction once but not keep flipping.
# This first line is enough to keep the local client from flipping again because
# the local keyboard doesn't keep sending the "D" event if the key is held down.
env.clients[client_name].key_k = "U"
# This second one is also needed for the network clients because they keep
# sending the "D" until they release the key.
env.clients[client_name].key_k_onoff = "OFF"
def control_firing(self, client_name):
# Fire only if the shield is off.
if ((env.clients[client_name].key_i == "D") and (not self.shield)) or self.testing_gun:
# Fire the gun.
if ((env.time_s - self.fire_time_s) > self.firing_delay_s) and (not self.gun_recharging):
self.fire_gun()
self.bullet_count += 1
# Timestamp the firing event.
self.fire_time_s = env.time_s
# Check to see if gun bullet count indicates the need to start recharging.
if (self.bullet_count > self.bullet_count_limit):
self.gun_recharge_start_time_s = env.time_s
self.gun_recharging = True
self.bullet_count = 0
# If recharged.
if (self.gun_recharging and (env.time_s - self.gun_recharge_start_time_s) > self.gun_recharge_wait_s):
self.gun_recharging = False
def fire_gun(self):
bullet_radius_m = 0.05
# Set the initial position of the bullet so that it clears (doesn't collide with) the host puck.
initial_position_2d_m = (self.puck.pos_2d_m +
(self.direction_2d_m * (1.1 * self.puck.radius_m + 1.1 * bullet_radius_m)) )
temp_bullet = Puck(initial_position_2d_m, bullet_radius_m, 0.3)
# Relative velocity of the bullet: the bullet velocity as seen from the host puck. This is the
# speed of the bullet relative to the motion of the host puck (host velocity BEFORE the firing of
# the bullet).
bullet_relative_vel_2d_mps = self.direction_2d_m * self.bullet_speed_mps
# Absolute velocity of the bullet.
temp_bullet.vel_2d_mps = self.puck.vel_2d_mps + bullet_relative_vel_2d_mps
# Also set the velocity of the Box2d puck.
temp_bullet.b2d_body.linearVelocity = b2Vec2( temp_bullet.vel_2d_mps.tuple())
temp_bullet.bullet = True
temp_bullet.b2d_body.bullet = True
temp_bullet.color = env.clients[self.puck.client_name].cursor_color
temp_bullet.client_name = self.puck.client_name
air_table.pucks.append( temp_bullet)
# Calculate the recoil impulse from firing the gun (opposite the direction of the bullet).
self.puck.impulse_2d_Ns = bullet_relative_vel_2d_mps * temp_bullet.mass_kg * (-1)
def control_shield(self, client_name):
if (env.clients[client_name].key_space == "D") and (not self.shield_recharging):
self.shield = True
else:
self.shield = False
# Check to see if the shield hit count indicates the need to start recharging.
if (self.shield_hit_count > self.shield_hit_count_limit):
self.shield_recharge_start_time_s = env.time_s
self.shield = False
self.shield_recharging = True
self.shield_hit_count = 0
# If recharged.
if (self.shield_recharging and (env.time_s - self.shield_recharge_start_time_s) > self.shield_recharge_wait_s):
self.shield_recharging = False
def draw(self):
# Draw the gun tube.
if (self.gun_recharging):
line_thickness = 3
else:
line_thickness = 0
# Draw the jet tube.
self.draw_tube( line_thickness)
# Draw the shield.
if (self.shield):
if self.shield_hit:
# Don't draw the shield for a moment after the hit. This visualizes the shield hit.
self.shield_hit_duration_s += dt_render_s
if (self.shield_hit_duration_s > self.shield_hit_duration_limit_s):
self.shield_hit = False
else:
pygame.draw.circle(game_window.surface, self.color, self.puck.pos_2d_px, self.puck.radius_px + 6, 4)
class Spring:
def __init__(self, p1, p2, length_m=3.0, strength_Npm=0.5, spring_color=THECOLORS["yellow"], width_m=0.025, drag_c=0.0):
# Optionally this spring can have one end pinned to a vector point. Do this by passing in p2 as a vector.
if (p2.__class__.__name__ == 'Vec2D'):
# Create a point puck at the pinning location.
# The location of this point puck will never change because
# it is not in the pucks list that is processed by the
# physics engine.
p2 = Puck( p2, 1.0, 1.0, pinned=True)
p2.vel_2d_mps = Vec2D(0.0,0.0)
length_m = 0.0
self.p1 = p1
self.p2 = p2
self.p1p2_separation_2d_m = Vec2D(0,0)
self.p1p2_separation_m = 0
self.p1p2_normalized_2d = Vec2D(0,0)
self.length_m = length_m
self.strength_Npm = strength_Npm
self.damper_Ns2pm2 = 0.5 #5.0 #0.05
self.unstretched_width_m = width_m #0.05
self.drag_c = drag_c
self.spring_vertices_2d_m = []
self.spring_vertices_2d_px = []
self.spring_color = spring_color
self.draw_as_line = False
def calc_spring_forces_on_pucks(self):
self.p1p2_separation_2d_m = self.p1.pos_2d_m - self.p2.pos_2d_m
self.p1p2_separation_m = self.p1p2_separation_2d_m.length()
# The pinned case needs to be able to handle the zero length spring. The
# separation distance will be zero when the pinned spring is at rest.
# This will cause a divide by zero error if not handled here.
if ((self.p1p2_separation_m == 0.0) and (self.length_m == 0.0)):
spring_force_on_1_2d_N = Vec2D(0.0,0.0)
else:
self.p1p2_normalized_2d = self.p1p2_separation_2d_m / self.p1p2_separation_m
# Spring force: acts along the separation vector and is proportional to the separation distance.
spring_force_on_1_2d_N = self.p1p2_normalized_2d * (self.length_m - self.p1p2_separation_m) * self.strength_Npm
# Damper force: acts along the separation vector and is proportional to the relative speed.
v_relative_2d_mps = self.p1.vel_2d_mps - self.p2.vel_2d_mps
v_relative_alongNormal_2d_mps = v_relative_2d_mps.projection_onto(self.p1p2_separation_2d_m)
damper_force_on_1_N = v_relative_alongNormal_2d_mps * self.damper_Ns2pm2
# Net force by both spring and damper
SprDamp_force_2d_N = spring_force_on_1_2d_N - damper_force_on_1_N
# This force acts in opposite directions for each of the two pucks. Notice the "+=" here, this
# is an aggregate across all the springs. This aggregate MUST be reset (zeroed) after the movements are
# calculated. So by the time you've looped through all the springs, you get the NET force, one each ball,
# applied of all individual springs.
self.p1.SprDamp_force_2d_N += SprDamp_force_2d_N * (+1)
self.p2.SprDamp_force_2d_N += SprDamp_force_2d_N * (-1)
# Add in some drag forces if a non-zero drag coef is specified. These are based on the
# velocity of the pucks (not relative speed as is the case above for damper forces).
self.p1.SprDamp_force_2d_N += self.p1.vel_2d_mps * (-1) * self.drag_c
self.p2.SprDamp_force_2d_N += self.p2.vel_2d_mps * (-1) * self.drag_c
def width_to_draw_m(self):
width_m = self.unstretched_width_m * (1 + 0.30 * (self.length_m - self.p1p2_separation_m))
if width_m < (0.05 * self.unstretched_width_m):
self.draw_as_line = True
width_m = 0.0
else:
self.draw_as_line = False
return width_m
def draw(self):
# Change the width to indicate the stretch or compression in the spring. Note, it's good to
# do this outside of the main calc loop (using the rendering timer). No need to do all this each
# time step.
width_m = self.width_to_draw_m()
# Calculate the four corners of the spring rectangle.
p1p2_perpendicular_2d = self.p1p2_normalized_2d.rotate90()
self.spring_vertices_2d_m = []
self.spring_vertices_2d_m.append(self.p1.pos_2d_m + (p1p2_perpendicular_2d * width_m))
self.spring_vertices_2d_m.append(self.p1.pos_2d_m - (p1p2_perpendicular_2d * width_m))
self.spring_vertices_2d_m.append(self.p2.pos_2d_m - (p1p2_perpendicular_2d * width_m))
self.spring_vertices_2d_m.append(self.p2.pos_2d_m + (p1p2_perpendicular_2d * width_m))
# Transform from world to screen.
self.spring_vertices_2d_px = []
for vertice_2d_m in self.spring_vertices_2d_m:
self.spring_vertices_2d_px.append( env.ConvertWorldToScreen( vertice_2d_m))
# Draw the spring
if self.draw_as_line == True:
pygame.draw.aaline(game_window.surface, self.spring_color, env.ConvertWorldToScreen(self.p1.pos_2d_m),
env.ConvertWorldToScreen(self.p2.pos_2d_m))
else:
pygame.draw.polygon(game_window.surface, self.spring_color, self.spring_vertices_2d_px)
class fwQueryCallback( b2QueryCallback):
# Checks for objects at particular locations (p) like under the cursor. #b2d
def __init__(self, p):
super(fwQueryCallback, self).__init__()
self.point = p
self.fixture = None
def ReportFixture(self, fixture):
body = fixture.body
if body.type == b2_dynamicBody:
inside=fixture.TestPoint(self.point)
if inside:
self.fixture=fixture
# We found the object, so stop the query
return False
# Continue the query
return True
class AirTable:
def __init__(self, walls_dic):
self.gON_2d_mps2 = Vec2D(-0.0, -9.8)
self.gOFF_2d_mps2 = Vec2D(-0.0, -0.0)
self.g_2d_mps2 = self.gOFF_2d_mps2
self.g_ON = False
self.b2_walls = []
self.pucks = []
self.puck_dictionary = {}
self.controlled_pucks = []
self.springs = []
self.walls = walls_dic
self.collision_count = 0
self.coef_friction_puck = 0.2
self.color_transfer = False
self.stop_physics = False
self.tangled = False
# Only do this is you have to. Avoids calls to the collision checker.
self.collision_checking_enabled = False
self.FPS_display = True
def draw(self):
#{"L_m":0.0, "R_m":10.0, "B_m":0.0, "T_m":10.0}
topLeft_2d_px = env.ConvertWorldToScreen( Vec2D( self.walls['L_m'], self.walls['T_m']))
topRight_2d_px = env.ConvertWorldToScreen( Vec2D( self.walls['R_m']-0.01, self.walls['T_m']))
botLeft_2d_px = env.ConvertWorldToScreen( Vec2D( self.walls['L_m'], self.walls['B_m']+0.01))
botRight_2d_px = env.ConvertWorldToScreen( Vec2D( self.walls['R_m']-0.01, self.walls['B_m']+0.01))
pygame.draw.line(game_window.surface, THECOLORS["orangered1"], topLeft_2d_px, topRight_2d_px, 1)
pygame.draw.line(game_window.surface, THECOLORS["orangered1"], topRight_2d_px, botRight_2d_px, 1)
pygame.draw.line(game_window.surface, THECOLORS["orangered1"], botRight_2d_px, botLeft_2d_px, 1)
pygame.draw.line(game_window.surface, THECOLORS["orangered1"], botLeft_2d_px, topLeft_2d_px, 1)
def checkForPuckAtThisPosition_b2d(self, x_px_or_tuple, y_px = None):
# This is used for cursor selection at a particular point on the puck. #b2d
# Return the selected puck and also the local point on the puck.
selected_puck = None
if y_px == None:
self.x_px = x_px_or_tuple[0]
self.y_px = x_px_or_tuple[1]
else:
self.x_px = x_px_or_tuple
self.y_px = y_px
# Convert to a world point.
test_position_2d_m = env.ConvertScreenToWorld(Vec2D(self.x_px, self.y_px))
# Convert this to a box2d vector.
p = test_position_b2d_m = b2Vec2( test_position_2d_m.tuple())
# Make a small box.
aabb = b2AABB( lowerBound=p-(0.001, 0.001), upperBound=p+(0.001, 0.001))
# Query the world for overlapping shapes.
query = fwQueryCallback( p)
b2_world.QueryAABB( query, aabb)
# If the query was successful and found a body at the cursor point.
if query.fixture:
selected_b2d_body = query.fixture.body
selected_b2d_body.awake = True
# Find the local point in the body's coordinate system.
local_b2d_m = selected_b2d_body.GetLocalPoint( p)
#local_b_b2d_m = selected_b2d_body.GetLocalVector( p)
#print local_b2d_m
# Use a dictionary to identify the puck based on the b2d body.
# Bullets have not been added to the dictionary.
if not selected_b2d_body.bullet:
selected_puck = air_table.puck_dictionary[ selected_b2d_body]
# Return a dictionary with the puck and local selection point on it.
return {'puck': selected_puck, 'b2d_xy_m': local_b2d_m}
else:
return {'puck': None, 'b2d_xy_m': b2Vec2(0,0)}
def checkForPuckAtThisPosition(self, x_px_or_tuple, y_px = None):
if y_px == None:
self.x_px = x_px_or_tuple[0]
self.y_px = x_px_or_tuple[1]
else:
self.x_px = x_px_or_tuple
self.y_px = y_px
test_position_2d_m = env.ConvertScreenToWorld(Vec2D(self.x_px, self.y_px))
for puck in self.pucks:
vector_difference_m = test_position_2d_m - puck.pos_2d_m
# Use squared lengths for speed (avoid square root)
mag_of_difference_m2 = vector_difference_m.length_squared()
if mag_of_difference_m2 < puck.radius_m**2:
#puck.selected = True
return puck
return None