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Fix T63227: import vertex colors from .ply file without alpha 

Differential Revision: https://developer.blender.org/D4648
This commit is contained in:
Robert Guetzkow 2019-04-05 18:14:01 +02:00 committed by Jacques Lucke
parent 05c959bb20
commit b9ba95de27
Notes: blender-bot 2023-02-14 19:17:43 +01:00 
Referenced by issue #63227, Vertex Colors not imported for PLY files in 2.8
1 changed files with 27 additions and 10 deletions
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37
io_mesh_ply/import_ply.py
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@ -249,9 +249,15 @@ def load_ply_mesh(filepath, ply_name):
uvindices = (el.index(b's'), el.index(b't'))
if -1 in uvindices:
uvindices = None
colindices = el.index(b'red'), el.index(b'green'), el.index(b'blue'), el.index(b'alpha')
# ignore alpha if not present
if el.index(b'alpha') == -1:
colindices = el.index(b'red'), el.index(b'green'), el.index(b'blue')
else:
colindices = el.index(b'red'), el.index(b'green'), el.index(b'blue'), el.index(b'alpha')
if -1 in colindices:
colindices = None
if any(idx > -1 for idx in colindices):
print("Warning: At least one obligatory color channel is missing, ignoring vertex colors.")
else: # if not a float assume uchar
colmultiply = [1.0 if el.properties[i].numeric_type in {'f', 'd'} else (1.0 / 255.0) for i in colindices]
@ -271,15 +277,26 @@ def load_ply_mesh(filepath, ply_name):
if uvindices:
mesh_uvs.extend([(vertices[index][uvindices[0]], vertices[index][uvindices[1]]) for index in indices])
if colindices:
mesh_colors.extend([
(
vertices[index][colindices[0]] * colmultiply[0],
vertices[index][colindices[1]] * colmultiply[1],
vertices[index][colindices[2]] * colmultiply[2],
vertices[index][colindices[3]] * colmultiply[3],
)
for index in indices
])
if len(colindices) == 3:
mesh_colors.extend([
(
vertices[index][colindices[0]] * colmultiply[0],
vertices[index][colindices[1]] * colmultiply[1],
vertices[index][colindices[2]] * colmultiply[2],
1.0
)
for index in indices
])
elif len(colindices) == 4:
mesh_colors.extend([
(
vertices[index][colindices[0]] * colmultiply[0],
vertices[index][colindices[1]] * colmultiply[1],
vertices[index][colindices[2]] * colmultiply[2],
vertices[index][colindices[3]] * colmultiply[3],
)
for index in indices
])
if uvindices or colindices:
# If we have Cols or UVs then we need to check the face order.