def do_test(iters):
start = time.time()
world = b2.World((0, -10), True)
world.create_static_body(shapes=b2.Edge((-40, 0), (40, 0)))
box_half_size = (0.5, 0.5)
box_density = 5.0
box_rows = 20
x = Vec2(-7, 0.75)
delta_x = (0.5625, 1.25)
delta_y = (1.125, 0)
fixture = b2.Fixture(b2.Polygon(box=box_half_size), density=box_density)
for i in range(box_rows):
y = copy(x)
for j in range(i, box_rows):
world.create_dynamic_body(position=y, fixtures=fixture)
y += delta_y
x += delta_x
init_time = time.time() - start
range_ = range(iters)
TIMESTEP = 1.0 / 60
start = time.time()
for i in range_:
world.step(TIMESTEP, 10, 10)
world.clear_forces()
step_time = time.time() - start
return init_time, step_time
def __init__(self):
Framework.__init__(self)
world = self.world
ground = world.create_static_body(shapes=b2.Edge((-20, 0),( 20, 0)))
controller = world.create_buoyancy_controller(
offset=15, normal=(0, 1), density=2,
linear_drag=2, angular_drag=1)
# Create a few spheres to bob around
for i in range(7):
body = self.world.create_dynamic_body(
position=(-10+4.0*i, 20),
fixtures=b2.Fixture(shape=b2.Circle(radius=1.0),
density=1.0)
)
controller.add_body(body)
# Create a bridge, and add it to the controller
num_planks = 30
plank_bodies = create_bridge(self.world, ground, (1.0, 0.25), (-14.5, 5), num_planks, 0.2, 1)
for body in plank_bodies:
controller.add_body(body)
# Create a circle underneath the bridge
body = self.world.create_dynamic_body(
position=(-10.0, 0),
fixtures=b2.Fixture(shape=b2.Circle(radius=1.0),
density=1.0)
)
controller.add_body(body)
# And finally, some triangles
for i in range(5):
body = self.world.create_dynamic_body(
position=(-10+3.0*i, 20),
fixtures=b2.Fixture(
shape=b2.Polygon(
vertices=[(-0.5,0),(0,-0.5),(0.5, 0.0)]),
density=1.0)
)
controller.add_body(body)
# And (really) finally this time, just something so we can be sure
# edges work, too.
edge = world.create_dynamic_body(
fixtures=b2.Fixture(shape=b2.Edge((5, 0),(5, 3)),
density=1.0)
)
controller.add_body(edge)
def do_test(iters):
start = time.time()
world = b2.World()
columns=5
rows=16
ground = world.create_static_body(
shapes=[
b2.Edge((-40,0),(40,0)),
b2.Edge((20,0),(20,20)),
]
)
box=b2.Fixture(
shape=b2.Polygon(box=(0.5,0.5)),
density=1,
friction=0.3)
circle=b2.Fixture(
shape=b2.Circle(0.5),
density=1,
friction=0.3)
box_start=-10
box_space=2.5
circle_start=8
circle_space=2.5
for j in range(columns):
for i in range(rows):
world.create_dynamic_body(
fixtures=box,
position=(box_start+box_space*j, 0.752 + 1.54 * i)
)
world.create_dynamic_body(
fixtures=circle,
position=(circle_start+circle_space*j, 0.752 + 1.54 * i)
)
init_time = time.time() - start
range_ = range(iters)
TIMESTEP = 1.0 / 60
start = time.time()
for i in range_:
world.step(TIMESTEP, 10, 10)
world.clear_forces()
step_time = time.time() - start
return init_time, step_time
def __init__(self):
Framework.__init__(self)
world = self.world
# Turn off normal gravity
world.gravity = (0, 0)
ground = world.create_static_body(shapes=b2.Edge((-20, 0),( 20, 0)))
controller = world.create_gravity_controller(G=0.8, inv_sqr=True)
# Create a few spheres to bob around
for i in range(1,4):
body = self.world.create_dynamic_body(
position=(0.25 * i, 2.0 + 7.5 * i),
fixtures=b2.Fixture(shape=b2.Circle(radius=0.25 * i),
density=1.0),
bullet=True,
)
controller.add_body(body)
# Create a bridge, and add it to the controller
num_planks = 30
plank_bodies = create_bridge(self.world, ground, (1.0, 0.25), (-14.5, 5), num_planks, 0.2, 10)
for body in plank_bodies:
controller.add_body(body)
# Create a circle underneath the bridge
body = self.world.create_dynamic_body(
position=(-10.0, 0),
fixtures=b2.Fixture(shape=b2.Circle(radius=1.0),
density=10.0)
)
controller.add_body(body)
# And finally, some triangles
for i in range(5):
body = self.world.create_dynamic_body(
position=(-10+3.0*i, 20),
fixtures=b2.Fixture(shape=b2.Polygon(vertices=[(-0.5,0),(0,-0.5),(0.5, 0.0)]),
density=1.0)
)
controller.add_body(body)
# PYPY version
pypy_world = b2.World((gravity_X, gravity_Y), True)
pypy_ground = pypy_world.create_static_body(position=(0, -10))
pypy_ground.create_polygon_fixture(box=(50, 10))
if amountOfBlocks > 0:
pypy_middle_block = pypy_world.create_static_body(position=(xMiddleBlock, yMiddleBlock))
pypy_middle_block.create_polygon_fixture(box=(blockWidth, blockHeight))
if amountOfBlocks > 1:
pypy_middle_block = pypy_world.create_static_body(position=(-xMiddleBlock, yMiddleBlock + blockHeight))
pypy_middle_block.create_polygon_fixture(box=(blockWidth, blockHeight))
pypy_box=b2.Fixture(
shape=b2.Polygon(box=(8,8)),
density=density,
friction=friction)
pypy_body = pypy_world.create_dynamic_body(
fixtures=pypy_box,
position=(x0, y0))
iterationNumber = 80;
pypy_start = time.time()
for i in range(iterationNumber):
pypy_world.step(timeStep, velocityIterations, positionIterations)
pypy_world.clear_forces()
pypy_finish = time.time()
print "Result:", (pypy_finish - pypy_start) * 1000
blockWidth = 5
blockHeight = 10
timeStep = 1.0 / 10.0
velocityIterations = 10
positionIterations = 10
world = b2.World((gravity_X, gravity_Y), True)
ground = world.create_static_body(position=(0, -10))
ground.create_polygon_fixture(box=(50, 10))
middle_block = world.create_static_body(position=(xMiddleBlock, yMiddleBlock))
middle_block.create_polygon_fixture(box=(blockWidth, blockHeight))
box = b2.Fixture(shape=b2.Polygon(box=(8, 8)),
density=density,
friction=friction)
body = world.create_dynamic_body(fixtures=box, position=(x0, y0))
print " py", " pypy", " differ", " Theoretical"
# print dir(pypy_body)
# This is our little game loop.
for i in range(80):
world.step(timeStep, velocityIterations, positionIterations)
world.clear_forces()
y = body.position.y
