Create a clipping frustum, ref #43

--HG--
branch : multipass-stereo

code/nel/include/nel/3d/stereo_ovr.h

@@ -91,6 +91,8 @@ public:
 	virtual void getScreenResolution(uint &width, uint &height);
 	/// Set latest camera position etcetera
 	virtual void updateCamera(uint cid, const NL3D::UCamera *camera);
+	/// Get the frustum to use for clipping
+	virtual void getClippingFrustum(uint cid, NL3D::UCamera *camera) const;
 
 	/// Is there a next pass
 	virtual bool nextPass();
@@ -143,6 +145,7 @@ private:
 	int m_Stage;
 	CViewport m_LeftViewport;
 	CViewport m_RightViewport;
+	CFrustum m_ClippingFrustum[NL_STEREO_MAX_USER_CAMERAS];
 	CFrustum m_LeftFrustum[NL_STEREO_MAX_USER_CAMERAS];
 	CFrustum m_RightFrustum[NL_STEREO_MAX_USER_CAMERAS];
 	CMatrix m_CameraMatrix[NL_STEREO_MAX_USER_CAMERAS];

code/nel/src/3d/stereo_ovr.cpp

@@ -219,6 +219,17 @@ void CStereoOVR::initCamera(uint cid, const NL3D::UCamera *camera)
 	m_LeftFrustum[cid].Right += projectionCenterOffset;
 	m_RightFrustum[cid].Left -= projectionCenterOffset;
 	m_RightFrustum[cid].Right -= projectionCenterOffset;
+
+	// TODO: Clipping frustum should also take into account the IPD
+	m_ClippingFrustum[cid] = m_LeftFrustum[cid];
+	m_ClippingFrustum[cid].Left = min(m_LeftFrustum[cid].Left, m_RightFrustum[cid].Left);
+	m_ClippingFrustum[cid].Right = max(m_LeftFrustum[cid].Right, m_RightFrustum[cid].Right);
+}
+
+/// Get the frustum to use for clipping
+void CStereoOVR::getClippingFrustum(uint cid, NL3D::UCamera *camera) const
+{
+	camera->setFrustum(m_ClippingFrustum[cid]);
 }
 
 void CStereoOVR::updateCamera(uint cid, const NL3D::UCamera *camera)