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A fix for bug #8814:

Browse Source 
http://projects.blender.org/tracker/?func=detail&atid=125&aid=8814&group_id=9

Smarter handling of faces that have a material index that points
to a null material.
This commit is contained in:
Chris Want 2008-10-06 17:06:13 +00:00
parent 16f199bda3
commit d5f647a221
1 changed files with 62 additions and 32 deletions
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94
release/scripts/vrml97_export.py
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@ -556,31 +556,28 @@ class VRML2Export:
issmooth = 0
maters = me.materials
nummats = self.getNumMaterials(me)
nummats = len(me.materials)
# Vertex and Face colors trump materials and image textures
if (self.facecolors or self.vcolors):
if nummats > 0:
if maters[0]:
self.writeShape(ob, me, 0, None)
else:
self.writeShape(ob, me, -1, None)
self.writeShape(ob, me, 0, None)
else:
self.writeShape(ob, me, -1, None)
# Do meshes with materials, possible with image textures
# Do meshes with materials, possibly with image textures
elif nummats > 0:
for matnum in range(len(maters)):
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)
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:
if me.faceUV:
images = self.getImages(me, -1)
@ -608,15 +605,6 @@ 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
@ -644,20 +632,43 @@ class VRML2Export:
self.writeIndented("}\n", -1)
self.writeIndented("\n")
def testShape(self, ob, me, matnum, image):
if ( (matnum == -1) and (image == None) ):
if ( len(me.faces) > 0 ):
return True
# Check if any faces the material or image
for face in me.faces:
if (matnum == -1):
if (f.image == image):
return True
elif (image == None):
if (face.mat == matnum):
return True
else:
if ((face.image == image) and (face.mat == matnum)):
return True
return False
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.
# matnum == -1 means don't check the face.mat
# image == None means don't check face.image
if ( not self.testShape(ob, me, matnum, image) ):
return False
self.writeIndented("Shape {\n",1)
self.writeIndented("appearance Appearance {\n", 1)
if (matnum != -1):
mater = me.materials[matnum]
self.writeMaterial(mater, self.cleanStr(mater.name,''))
if (mater.mode & Blender.Material.Modes['TEXFACE']):
if image != None:
self.writeImageTexture(image.name, image.filename)
if (mater):
self.writeMaterial(mater, self.cleanStr(mater.name,''))
if (mater.mode & Blender.Material.Modes['TEXFACE']):
if image != None:
self.writeImageTexture(image.name, image.filename)
else:
self.writeDefaultMaterial()
else:
if image != None:
self.writeImageTexture(image.name, image.filename)
@ -668,6 +679,8 @@ class VRML2Export:
self.writeIndented("}\n", -1)
return True
def writeGeometry(self, ob, me, matnum, image):
#-- IndexedFaceSet or IndexedLineSet
@ -784,6 +797,23 @@ class VRML2Export:
self.writeIndented("]\n",-1)
self.writeIndented("}\n",-1)
def writeDefaultMaterial(self):
matName = "default"
# look up material name, use it if available
if self.matNames.has_key(matName):
self.writeIndented("material USE MA_%s\n" % matName)
self.matNames[matName]+=1
return;
self.matNames[matName]=1
self.writeIndented("material DEF MA_%s Material {\n" % matName, 1)
self.writeIndented("diffuseColor 0.8 0.8 0.8\n")
self.writeIndented("specularColor 1.0 1.0 1.0\n")
self.writeIndented("shininess 0.5\n")
self.writeIndented("transparency 0.0\n")
self.writeIndented("}\n",-1)
def writeMaterial(self, mat, matName):
# look up material name, use it if available
if self.matNames.has_key(matName):