[osg-users] Bug with applying global default attributes?

OpenSceneGraph Users osg-users at lists.openscenegraph.org
Sun Feb 2 12:53:27 PST 2020

I have determined that the problem is exercised if the first node sets the 
blend for FBO 1:

stateset->setAttribute(new osg::Enablei(GL_BLEND, 1));
osg::BlendEquationi* blendEq = new osg::BlendEquationi(1,
osg::BlendFunci* blendFunc = new osg::BlendFunci(1,
                             osg::BlendFunci::ONE, osg::BlendFunci::ONE);
stateset->setAttributeAndModes(blendEq, osg::StateAttribute::ON);
stateset->setAttributeAndModes(blendFunc, osg::StateAttribute::ON);

Removing this prevents the FBO 0 blending problem on the second node.


On Sunday, February 2, 2020 at 9:22:22 AM UTC-8, Rob Spearman wrote:
> I can confirm the bug also exists on 3.6.5-rc3 branch.  I don't know if it 
> pre-existed that.
> I have too many dependencies to be able to share a model.  Simplistic 
> models do not seem to exhibit the same behavior.
> I'll keep trying to debug.  When is applyGlobalDefaultAttribute supposed 
> to be called?  What sets these defaults?

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