/usr/share/doc/python-elements/examples/demo8_contact.py is in python-elements 0.13+svn20090823.230+dfsg-2build1.
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This file is an example for using 'Elements'
Elements is a 2D Physics API for Python using Box2D
Home: http://elements.linuxuser.at
IRC: #elements on irc.freenode.net
Code: svn co http://svn2.assembla.com/svn/elements
http://www.assembla.com/wiki/show/elements
License: Examples: Public Domain -- No legal restrictions
Elements API: GPLv3
"""
import pygame
from pygame.locals import *
from pygame.color import *
import sys
sys.path.insert(0, "..") # if Elements has yet to be installed
import elements
from elements.locals import *
def contact_add(c):
print "Any Contact"
# print c
# print c.normalForce
# print c.tangentForce
def contact_add_ball(c):
print "Contact with Ball"
def contact_add_poly(c):
print "Polygon Contact"
def main():
# PyGame Init
pygame.init()
size = (1200, 900)
screen = pygame.display.set_mode(size)
clock = pygame.time.Clock()
# Create the Physical Space Class
world = elements.Elements(size)
world.renderer.set_surface(screen)
b1 = world.add.ball((100, 100), 100)
# Add Contact Callbacks
world.callbacks.add(CALLBACK_CONTACT_ADD, contact_add)
world.callbacks.add(CALLBACK_CONTACT_ADD, contact_add_ball, [b1])
# Add A Ground
world.add.ground()
# Default Settings
running = True
draw_poly = False
points = []
# Main Loop
while running:
for event in pygame.event.get():
if event.type == QUIT or (event.type == KEYDOWN and event.key == K_ESCAPE):
# Bye Bye
running = False
elif event.type == KEYDOWN and event.key == K_SPACE:
# Pause with SPACE
world.run_physics = not world.run_physics
elif event.type == MOUSEBUTTONDOWN and event.button == 3:
# Add Square
world.add.triangle(event.pos, sidelength=50)
elif event.type == MOUSEBUTTONDOWN and event.button == 1:
# Start/Stop Wall-Drawing
#world.add_ball(event.pos)
if not draw_poly:
draw_poly = True
points = []
points.append(event.pos)
elif event.type == MOUSEBUTTONUP and event.button == 1:
if draw_poly:
# Create Polygon
draw_poly = False
points.append(event.pos)
if len(points) > 2:
print points
print len(points)
body = world.add.complexPoly(points)
world.callbacks.add(CALLBACK_CONTACT_ADD, contact_add_poly, body)
else:
world.add.rect(event.pos, width=80, height=30)
elif event.type == MOUSEMOTION and draw_poly:
points.append(event.pos)
# Clear Display
screen.fill((255,255,255))
# Update & Draw World
world.update()
world.draw()
# Show line if drawing a wall
if draw_poly and len(points) > 1:
pygame.draw.lines(screen, THECOLORS["black"], False, points)
# Flip Display
pygame.display.flip()
# Try to stay at 50 FPS
clock.tick(50)
# output framerate in caption
pygame.display.set_caption("elements: %i | fps: %i" % (world.element_count, int(clock.get_fps())))
if __name__ == "__main__":
main()
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