void LightsourceManager::setLightsources(bool navigationEnabled,DisplayState* displayState,GLContextData& contextData) const
{
/* Get the lighting state tracker: */
GLLightTracker* lt=contextData.getLightTracker();
/* Process all physical light sources first: */
GLsizei lightIndex=0;
bool haveNavigationalLightsources=false;
for(const LightsourceListItem* lsPtr=firstLightsource;lsPtr!=0&&lightIndex<lt->getMaxNumLights();lsPtr=lsPtr->succ)
{
if(lsPtr->isEnabled())
{
/* Only set light source now if it is physical, or if there is no navigation transformation: */
if(lsPtr->physical||!navigationEnabled)
{
/* Set the light source in the light tracker and OpenGL: */
lt->enableLight(lightIndex,lsPtr->getLight());
/* Increment the light index: */
++lightIndex;
}
else
haveNavigationalLightsources=true;
}
}
if(haveNavigationalLightsources)
{
/* Temporarily go to navigational coordinates: */
glPushMatrix();
glLoadIdentity();
glMultMatrix(displayState->modelviewNavigational);
/* Process all navigational light sources: */
for(const LightsourceListItem* lsPtr=firstLightsource;lsPtr!=0&&lightIndex<lt->getMaxNumLights();lsPtr=lsPtr->succ)
{
if(lsPtr->isEnabled()&&!lsPtr->physical)
{
/* Set the light source in the light tracker and OpenGL: */
lt->enableLight(lightIndex,lsPtr->getLight());
/* Increment the light index: */
++lightIndex;
}
}
/* Return to physical coordinates: */
glPopMatrix();
}
/* Disable all unused light sources that might still be enabled from the last pass: */
while(lightIndex<lt->getMaxNumLights())
{
lt->disableLight(lightIndex);
++lightIndex;
}
}
