def center(self):
bbox = boundingBox(self.vertices)
dx = bbox[3] - bbox[0]
dy = bbox[4] - bbox[1]
dz = bbox[5] - bbox[2]
self.translateX(-bbox[3] + dx * 0.5)
self.translateY(-bbox[4] + dy * 0.5)
self.translateZ(-bbox[5] + dy * 0.5)
def tessPolygon(mesh,
positions,
z,
color=None,
flipped=False,
texture_boundingBox=None):
offset = len(mesh.vertices)
n = [0., 0., 1.]
# Get rid of begining/ending duplicate
if positions[0][0] == positions[-1][0] and positions[0][1] == positions[
-1][1]:
positions.pop()
rotY = []
if flipped:
n = [0., 0., -1.]
rotY = quat_from_axis(np.radians(180), (0, 1, 0))
if texture_boundingBox == None:
texture_boundingBox = boundingBox(positions)
points = []
for point in positions:
v = np.array([point[0], point[1], z])
if flipped:
v = quat_mult(rotY, (v[0], v[1], v[2]))
points.append([point[0], point[1]])
mesh.addTexCoord([
remap(point[0], texture_boundingBox[0], texture_boundingBox[2],
0.0, 1.0),
remap(point[1], texture_boundingBox[1], texture_boundingBox[3],
0.0, 1.0)
])
mesh.addVertex(v)
mesh.addNormal(n)
if color:
mesh.addColor(color)
segments = []
for i in range(len(positions)):
segments.append([i, (i + 1) % len(positions)])
cndt = triangulate(dict(vertices=points, segments=segments), 'p')
for face in cndt['triangles']:
mesh.addTriangle(offset + (face[0] % len(points)),
offset + (face[1] % len(points)),
offset + (face[2] % len(points)))
# offset += len(positions)
return mesh