//-----------------------------------------------------------------------
Vector4 Light::getAs4DVector(bool cameraRelativeIfSet) const
{
Vector4 ret;
if (mLightType == Light::LT_DIRECTIONAL)
{
ret = -(getDerivedDirection()); // negate direction as 'position'
ret.w = 0.0; // infinite distance
}
else
{
ret = getDerivedPosition(cameraRelativeIfSet);
ret.w = 1.0;
}
return ret;
}
/* Update function (currently used for making sure the origin stuff for the
extra culling frustum is up to date */
void PCZCamera::update(void)
{
// make sure the extra culling frustum origin stuff is up to date
if (mProjType == PT_PERSPECTIVE)
//if (!mCustomViewMatrix)
{
mExtraCullingFrustum.setUseOriginPlane(true);
mExtraCullingFrustum.setOrigin(getDerivedPosition());
mExtraCullingFrustum.setOriginPlane(getDerivedDirection(), getDerivedPosition());
}
else
{
// In ortho mode, we don't want to cull things behind camera.
// This helps for back casting which is useful for texture shadow projection on directional light.
mExtraCullingFrustum.setUseOriginPlane(false);
}
}
