void ClipPlaneManager::setClipPlanes(bool navigationEnabled,DisplayState* displayState,GLContextData& contextData) const
{
/* Get the clipping plane state tracker: */
GLClipPlaneTracker* cpt=contextData.getClipPlaneTracker();
/* Process all physical clipping planes first: */
GLsizei clipPlaneIndex=0;
bool haveNavigationalClipPlanes=false;
for(const ClipPlaneListItem* cpPtr=firstClipPlane;cpPtr!=0&&clipPlaneIndex<cpt->getMaxNumClipPlanes();cpPtr=cpPtr->succ)
{
if(cpPtr->isEnabled())
{
/* Only set clipping plane now if it is physical, or if there is no navigation transformation: */
if(cpPtr->physical||!navigationEnabled)
{
/* Set the clipping plane in the clipping plane tracker and OpenGL: */
GLClipPlaneTracker::Plane plane;
for(int i=0;i<3;++i)
plane[i]=cpPtr->getPlane().getNormal()[i];
plane[3]=-cpPtr->getPlane().getOffset();
cpt->enableClipPlane(clipPlaneIndex,plane);
/* Increment the clipping plane index: */
++clipPlaneIndex;
}
else
haveNavigationalClipPlanes=true;
}
}
if(haveNavigationalClipPlanes&&clipPlaneIndex<cpt->getMaxNumClipPlanes())
{
/* Temporarily go to navigational coordinates: */
glPushMatrix();
glLoadIdentity();
glMultMatrix(displayState->modelviewNavigational);
/* Process all navigational clipping planes: */
for(const ClipPlaneListItem* cpPtr=firstClipPlane;cpPtr!=0&&clipPlaneIndex<cpt->getMaxNumClipPlanes();cpPtr=cpPtr->succ)
{
if(cpPtr->isEnabled()&&!cpPtr->physical)
{
/* Set the clipping plane in the clipping plane tracker and OpenGL: */
GLClipPlaneTracker::Plane plane;
for(int i=0;i<3;++i)
plane[i]=cpPtr->getPlane().getNormal()[i];
plane[3]=-cpPtr->getPlane().getOffset();
cpt->enableClipPlane(clipPlaneIndex,plane);
/* Increment the clipping plane index: */
++clipPlaneIndex;
}
}
/* Return to physical coordinates: */
glPopMatrix();
}
/* Disable all unused clipping planes still enabled from the last pass: */
while(clipPlaneIndex<cpt->getMaxNumClipPlanes())
{
cpt->disableClipPlane(clipPlaneIndex);
++clipPlaneIndex;
}
}
