ab4398e440
setActiveTextureUnit methods of osg::State so they return false if the texture unit is outside the range of allowable units for the driver. Currently, the functions would return true even if the units are invalid. This would cause the osg::State to become out of sync with the actual driver state, which can cause some bugs in certain cases. The change I made would verify that the unit passed to setClientActiveTextureUnit is below GL_MAX_TEXTURE_COORDS, and the unit passed to setActiveTextureUnit is below max(GL_MAX_TEXTURE_COORDS,GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS). I modeled this behavior from the OpenGL docs for these commands which can be found here: http://www.opengl.org/sdk/docs/man/xhtml/glClientActiveTexture.xml http://www.opengl.org/sdk/docs/man/xhtml/glActiveTexture.xml "