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A mesh from the Blender python Mesh module can sometimes have

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a materials array with entries that are 'None'. Added some code
to check for this perverse situation.
This commit is contained in:
Chris Want 2006-08-16 01:06:38 +00:00
parent 73f44f6fbb
commit 1f68dfb499
1 changed files with 32 additions and 13 deletions
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45
release/scripts/vrml97_export.py
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@ -455,8 +455,9 @@ class VRML2Export:
if (me.vertexColors):
if len(me.materials) > 0:
mat = me.materials[0]
if (mat.mode & Blender.Material.Modes['VCOL_PAINT']):
self.vcolors = 1
if mat:
if (mat.mode & Blender.Material.Modes['VCOL_PAINT']):
self.vcolors = 1
# check if object is wireframe only
if ob.drawType == Blender.Object.DrawTypes.WIRE:
@ -557,26 +558,31 @@ class VRML2Export:
issmooth = 0
maters = me.materials
nummats = self.getNumMaterials(me)
# Vertex and Face colors trump materials and image textures
if (self.facecolors or self.vcolors):
if len(maters) > 0:
self.writeShape(ob, me, 0, None)
if nummats > 0:
if maters[0]:
self.writeShape(ob, me, 0, None)
else:
self.writeShape(ob, me, -1, None)
else:
self.writeShape(ob, me, -1, None)
# Do meshes with materials, possible with image textures
elif len(maters) > 0:
elif nummats > 0:
for matnum in range(len(maters)):
images = []
if me.faceUV:
images = self.getImages(me, matnum)
if len(images) > 0:
for image in images:
self.writeShape(ob, me, matnum, image)
if maters[matnum]:
images = []
if me.faceUV:
images = self.getImages(me, matnum)
if len(images) > 0:
for image in images:
self.writeShape(ob, me, matnum, image)
else:
self.writeShape(ob, me, matnum, None)
else:
self.writeShape(ob, me, matnum, None)
else:
self.writeShape(ob, me, matnum, None)
else:
if me.faceUV:
images = self.getImages(me, -1)
@ -604,6 +610,15 @@ class VRML2Export:
imageNames[imName]=1
return images
def getNumMaterials(self, me):
# Oh silly Blender, why do you sometimes have 'None' as
# a member of the me.materials array?
num = 0
for mat in me.materials:
if mat:
num = num + 1
return num
def writeCoordinates(self, me, meshName):
coordName = "coord_%s" % (meshName)
# look up coord name, use it if available
@ -631,6 +646,10 @@ class VRML2Export:
self.writeIndented("\n")
def writeShape(self, ob, me, matnum, image):
# Note: at this point it is assumed for matnum!=-1 that the
# material in me.materials[matnum] is not equal to 'None'.
# Such validation should be performed by the function that
# calls this one.
self.writeIndented("Shape {\n",1)
self.writeIndented("appearance Appearance {\n", 1)