Modified SceneNode::FrustumCull

Now provides an implementation which will test the bounding volume
against the frustum (Basic frustum culling)
Is now const
Disabled face culling on sprites


Former-commit-id: 5cb7a94b38ef8b0ffa5a78f16f5ef65a59ab375d

src/Nazara/Graphics/Model.cpp

@@ -438,14 +438,6 @@ NzModel& NzModel::operator=(NzModel&& node)
 	return *this;
 }
 
-bool NzModel::FrustumCull(const NzFrustumf& frustum)
-{
-	if (!m_boundingVolumeUpdated)
-		UpdateBoundingVolume();
-
-	return frustum.Contains(m_boundingVolume);
-}
-
 void NzModel::InvalidateNode()
 {
 	NzSceneNode::InvalidateNode();