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raaargh fix winding order/rotation again in subdivision

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Chris Hodapp 2019-12-01 01:25:32 +01:00
parent 78c61ddb22
commit 6ac45773f7
1 changed files with 10 additions and 8 deletions
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18
cage.py
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@ -46,19 +46,21 @@ class Cage(object):
def subdivide_deprecated(self):
# assume self.verts has shape (4,3).
# Midpoints of every segment:
mids = (self.verts + numpy.roll(self.verts, 1, axis=0)) / 2
mids_adj = numpy.roll(mids, -1, axis=0)
mids = (self.verts + numpy.roll(self.verts, -1, axis=0)) / 2
# Centroid:
centroid = numpy.mean(self.verts, axis=0)
# Now, every single new boundary has: one vertex of 'bound', an
# adjacent midpoint, a centroid, and the other adjacent midpoint.
cages = [
Cage(numpy.array([self.verts[i,:], mids[i,:], centroid, mids_adj[i,:]])[::-1,:],
self.splits)
for i in range(4)
arrs = [
[self.verts[0,:], mids[0,:], centroid, mids[3,:]],
[mids[0,:], self.verts[1,:], mids[1,:], centroid],
[centroid, mids[1,:], self.verts[2,:], mids[2,:]],
[mids[3,:], centroid, mids[2,:], self.verts[3,:]],
]
# TODO: Figure out why I have to have the [::-1,:] above to
# fix the winding order
# The above respects winding order and should not add any rotation.
# I'm sure it has a pattern I can factor out, but I've not tried
# yet.
cages = [Cage(numpy.array(a), self.splits) for a in arrs]
return cages
def is_fork(self):
return False