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Faster generation of normals with numpy.

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Daid 2012-07-28 11:04:04 +02:00
parent fd98542ce9
commit c92cc07afd
1 changed files with 8 additions and 7 deletions
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13
Cura/util/mesh.py
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@ -63,12 +63,13 @@ class mesh(object):
mat = numpy.array([mat[0],mat[2],mat[1]])
self.vertexes = (numpy.matrix(self.origonalVertexes, copy = False) * numpy.matrix(mat)).getA()
for i in xrange(0, len(self.origonalVertexes), 3):
v1 = self.vertexes[i]
v2 = self.vertexes[i+1]
v3 = self.vertexes[i+2]
self.normal[i/3] = numpy.cross((v2 - v1), (v3 - v1))
self.normal[i/3] /= (self.normal[i/3] * self.normal[i/3]).sum()
tris = self.vertexes.reshape(self.vertexCount / 3, 3, 3)
normals = numpy.cross( tris[::,1 ] - tris[::,0] , tris[::,2 ] - tris[::,0] )
lens = numpy.sqrt( normals[:,0]**2 + normals[:,1]**2 + normals[:,2]**2 )
normals[:,0] /= lens
normals[:,1] /= lens
normals[:,2] /= lens
self.normal = normals
self.getMinimumZ()