[osg-submissions] OBJ Loader Patches

[Doug McCorkle]

Hello,

Attached is patch that corrects/improves the following issues with the  
OBJ loader:

1. Added options to control wether the osgUtil::Tessellator or  
osgUtil::TriStripVisitor are run. By default they still run just as  
before.
2. Added support for the Emissive material. The data was being read  
from the mtl file but was never being applied to the model.
3. This is the main bug addressed, when a model is read in with an  
alpha value specified like:

newmtl Material__8
	Ns 24
	d 0.33
	illum 2
	Kd 0.204 0.204 0.204
	Ks 0 0 0
	Ka 0.153 0.153 0.153

where the alpha value is d. The loader would then overwrite the alpha  
value when reading the diffuse, specular, and ambient colors. I have  
changed all the material color readers to only set the values they  
read and to use the default colors specified in the constructor of the  
obj class. With these changes, the obj reader now handles opacity  
correctly if the alpha value is specified before the material color.

Doug

-------------- next part --------------
A non-text attachment was scrubbed...
Name: objPatches.tar.bz2
Type: application/bzip2
Size: 7891 bytes
Desc: not available
URL: <http://lists.openscenegraph.org/pipermail/osg-submissions-openscenegraph.org/attachments/20080703/65872230/attachment.bin>
-------------- next part --------------