def convexPoly(
self,
vertices,
dynamic=True,
density=1.0,
restitution=0.16,
friction=0.5):
""" Add a complex polygon with vertices in absolute positions (meters or pixels, according
to INPUT_PIXELS or INPUT_METERS). This function does the reduction and convec hulling
of the poly, and calls add_poly(...)
Parameters:
vertices .. absolute vertices positions
other ..... see [physics parameters]
Return: box2d.b2Body
"""
# NOTE: Box2D has a maximum poly vertex count, defined in Common/box2d.b2Settings.h (box2d.b2_maxPolygonVertices)
# We need to make sure, that we reach that by reducing the poly with increased tolerance
# Reduce Polygon
tolerance = 10 # 5
v_new = vertices
while len(v_new) > box2d.b2_maxPolygonVertices:
tolerance += 1
v_new = tools_poly.reduce_poly(vertices, tolerance)
print "convexPoly: Polygon reduced from %i to %i vertices | tolerance: %i" % (len(vertices), len(v_new), tolerance)
vertices = v_new
# So poly should be alright now
# Continue reducing the vertecs
vertices_orig_reduced = vertices
vertices = tools_poly.poly_center_vertices(vertices)
vertices = tools_poly.convex_hull(vertices)
if len(vertices) < 3:
return
# Define the body
x, y = tools_poly.calc_center(vertices_orig_reduced)
return self.poly((x, y), vertices, dynamic,
density, restitution, friction)
def convexPoly(self,
vertices,
dynamic=True,
density=1.0,
restitution=0.16,
friction=0.5):
""" Add a complex polygon with vertices in absolute positions (meters or pixels, according
to INPUT_PIXELS or INPUT_METERS). This function does the reduction and convec hulling
of the poly, and calls add_poly(...)
Parameters:
vertices .. absolute vertices positions
other ..... see [physics parameters]
Return: box2d.b2Body
"""
# NOTE: Box2D has a maximum poly vertex count, defined in Common/box2d.b2Settings.h (box2d.b2_maxPolygonVertices)
# We need to make sure, that we reach that by reducing the poly with increased tolerance
# Reduce Polygon
tolerance = 10 # 5
v_new = vertices
while len(v_new) > box2d.b2_maxPolygonVertices:
tolerance += 1
v_new = tools_poly.reduce_poly(vertices, tolerance)
print "convexPoly: Polygon reduced from %i to %i vertices | tolerance: %i" % (
len(vertices), len(v_new), tolerance)
vertices = v_new
# So poly should be alright now
# Continue reducing the vertecs
vertices_orig_reduced = vertices
vertices = tools_poly.poly_center_vertices(vertices)
vertices = tools_poly.convex_hull(vertices)
if len(vertices) < 3:
return
# Define the body
x, y = tools_poly.calc_center(vertices_orig_reduced)
return self.poly((x, y), vertices, dynamic, density, restitution,
friction)