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Manually apply the osg::Light state

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Reduce the amount of virtual function calls. Don't use the osg::Light's lightNum. Don't set spotlight state that we're not using (yet).
This commit is contained in:
scrawl 2016-03-11 15:42:14 +01:00
parent 58e0e8bd4e
commit 174dd82894
1 changed files with 17 additions and 4 deletions
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21
components/sceneutil/lightmanager.cpp
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@ -51,14 +51,27 @@ namespace SceneUtil
state.applyModelViewMatrix(state.getInitialViewMatrix());
for (unsigned int i=0; i<mLights.size(); ++i)
{
mLights[i]->setLightNum(i+mIndex);
mLights[i]->apply(state);
}
applyLight((GLenum)((int)GL_LIGHT0 + i + mIndex), mLights[i].get());
state.applyModelViewMatrix(modelViewMatrix);
}
void applyLight(GLenum lightNum, const osg::Light* light) const
{
glLightfv( lightNum, GL_AMBIENT, light->getAmbient().ptr() );
glLightfv( lightNum, GL_DIFFUSE, light->getDiffuse().ptr() );
glLightfv( lightNum, GL_SPECULAR, light->getSpecular().ptr() );
glLightfv( lightNum, GL_POSITION, light->getPosition().ptr() );
// TODO: enable this once spot lights are supported
// need to transform SPOT_DIRECTION by the world matrix?
//glLightfv( lightNum, GL_SPOT_DIRECTION, light->getDirection().ptr() );
//glLightf ( lightNum, GL_SPOT_EXPONENT, light->getSpotExponent() );
//glLightf ( lightNum, GL_SPOT_CUTOFF, light->getSpotCutoff() );
glLightf ( lightNum, GL_CONSTANT_ATTENUATION, light->getConstantAttenuation() );
glLightf ( lightNum, GL_LINEAR_ATTENUATION, light->getLinearAttenuation() );
glLightf ( lightNum, GL_QUADRATIC_ATTENUATION, light->getQuadraticAttenuation() );
}
private:
unsigned int mIndex;