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Fix light state issue

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GLSL does not respect gl_Disable(GL_LIGHTX), so we have to set unused lights to zero.

Sadly, this change makes the applying of the modelView matrix less efficient. So far I couldn't find a better solution, osg's state tracker keeps getting in the way. :(
This commit is contained in:
scrawl 2016-02-17 00:33:20 +01:00
parent 9376811213
commit f93b7ec943
1 changed files with 21 additions and 22 deletions
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37
components/sceneutil/lightmanager.cpp
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@ -56,18 +56,6 @@ namespace SceneUtil
}
state.applyModelViewMatrix(modelViewMatrix);
/*
for (int i=0; i<8; ++i)
{
osg::ref_ptr<osg::Light> defaultLight (new osg::Light(i));
defaultLight->setAmbient(osg::Vec4());
defaultLight->setDiffuse(osg::Vec4());
defaultLight->setSpecular(osg::Vec4());
defaultLight->setConstantAttenuation(0.f);
state.setGlobalDefaultAttribute(defaultLight);
}
*/
}
private:
@ -204,19 +192,19 @@ namespace SceneUtil
return found->second;
else
{
std::vector<osg::ref_ptr<osg::Light> > lights;
for (unsigned int i=0; i<lightList.size();++i)
lights.push_back(lightList[i]->mLightSource->getLight(frameNum));
osg::ref_ptr<LightStateAttribute> attr = new LightStateAttribute(mStartLight, lights);
osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet;
for (unsigned int i=0; i<lightList.size();++i)
{
std::vector<osg::ref_ptr<osg::Light> > lights;
lights.push_back(lightList[i]->mLightSource->getLight(frameNum));
osg::ref_ptr<LightStateAttribute> attr = new LightStateAttribute(mStartLight+i, lights);
// don't use setAttributeAndModes, that does not support light indices!
stateset->setAttribute(attr, osg::StateAttribute::ON);
stateset->setAssociatedModes(attr, osg::StateAttribute::ON);
}
stateSetCache.insert(std::make_pair(hash, stateset));
return stateset;
}
@ -254,6 +242,17 @@ namespace SceneUtil
void LightManager::setStartLight(int start)
{
mStartLight = start;
// Set default light state to zero
for (int i=start; i<8; ++i)
{
osg::ref_ptr<osg::Light> defaultLight (new osg::Light(i));
defaultLight->setAmbient(osg::Vec4());
defaultLight->setDiffuse(osg::Vec4());
defaultLight->setSpecular(osg::Vec4());
defaultLight->setConstantAttenuation(0.f);
getOrCreateStateSet()->setAttributeAndModes(defaultLight, osg::StateAttribute::OFF);
}
}
int LightManager::getStartLight() const