def genVertexNormalsPlane(segment):
"""
generate per vertex normals.
segment must consist of plane polygon faces.
"""
normals = [zeros(3, float32)] * segment.numVertices
# Calculate the vertex normals.
for face in segment.faces:
_genPlaneFaceNormals(segment, face, normals)
# Normalize the vertex normals.
for i in range(segment.numVertices):
normalize(normals[i])
return normals
def genVertexNormalsUnplane(segment):
"""
generate normals for not plane faces.
"""
normals = [zeros(3, float32)] * segment.numVertices
# Calculate the vertex normals.
for face in segment.faces:
planeFaces = face.getPlaneFaces(segment)
for face in planeFaces:
_genPlaneFaceNormals(segment, face, normals)
# Normalize the vertex normals.
for i in range(segment.numVertices):
normalize(normals[i])
return normals
def motion(self, x, y):
""" mouse motion event handler,
only rotates if button 1 pressed. """
x -= self.app.halfSize[0]
y -= self.app.halfSize[1]
if not self.leftMouseButtonPressed:
self.lastX = x
self.lastY = y
return
rotX = - float(x - self.lastX) * self.sensitivity
rotY = - float(y - self.lastY) * self.sensitivity
rotateView( self.direction, rotX, 0.0, 1.0, 0.0 )
rotAxis = array( [ -self.direction[2], 0.0, self.direction[0] ] , float32 )
normalize( rotAxis )
rotateView( self.direction, rotY, rotAxis[0], rotAxis[1], rotAxis[2] )
self.lastX = x
self.lastY = y
self.needsUpdate = True
