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Cry3DEngine/IndoorShadowVolumes.h

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+
+//////////////////////////////////////////////////////////////////////
+//
+//	Crytek Indoor Engine DLL source code
+//	
+//	File: IndoorShadowVolumes.h
+//
+//	History:
+//	-August 28,2001:Created by Marco Corbetta
+//
+//////////////////////////////////////////////////////////////////////
+
+#ifndef INDOORSHADOWVOLUMES_H
+#define INDOORSHADOWVOLUMES_H
+
+#if _MSC_VER > 1000
+# pragma once
+#endif
+
+//////////////////////////////////////////////////////////////////////
+#define FLAG_SKIP_SHADOWVOLUME 1
+
+//forward declarations
+//////////////////////////////////////////////////////////////////////
+#include "IndoorVolumes.h"
+#include "I3DEngine.h"								// USE_SHADOW_VERSION
+
+class CDLight;
+class CRETriMeshShadow;
+class IStencilShadowConnectivity;
+
+//an entire shadow volume object containing many edges and faces
+//////////////////////////////////////////////////////////////////////
+class CShadowVolObject : public CVolume
+{
+public:	
+
+	// constructor
+	CShadowVolObject()
+	{						
+//		m_pFaceList=NULL;		
+		m_pReMeshShadow=NULL;
+		m_pSystemVertexBuffer=NULL;
+		m_pEdgeConnectivity=0;
+		m_nNumVertices=0;
+//		m_nNumFaces=0;
+	};
+
+	//! destructor
+	~CShadowVolObject();
+
+	//!
+	bool	CheckInside(const Vec3d &pos,bool bWorldSpace=true)
+	{
+		//temporary return false...will be a cool AI game play feature to know 
+		//if we are in shadows
+		return (false);
+	}
+
+	//! precalculate the connectivity infos to build the object silouhette
+	bool CreateConnectivityInfo( void );	
+
+	//! create/update a vertex buffer containing the shadow volume (for static lights)
+	void	RebuildShadowVolumeBuffer( const CDLight &lSource, float fExtent );
+
+  Vec3d * GetSysVertBufer() { return m_pSystemVertexBuffer; }
+
+  int		GetNumVertices() { return(m_nNumVertices); }
+//  int		GetNumFaces() { return(m_nNumFaces); }
+
+	// Shader RenderElements for stencil
+	CRETriMeshShadow *						m_pReMeshShadow;								//!<
+  
+  void CheckUnload();
+
+  IStencilShadowConnectivity * & GetEdgeConnectivity() { return m_pEdgeConnectivity; }
+
+protected:
+
+//! free the shadow volume buffers
+	void	FreeVertexBuffers();
+
+	//list of faces from source objects, its always shared from the stat obj
+//	int														m_nNumFaces;										//!<
+//  CObjFace *										m_pFaceList;										//!< pointer to MeshIdx faces [0..m_nNumFaces-1]
+
+	//list of edges...can be shared from another shadow vol object
+	IStencilShadowConnectivity *	m_pEdgeConnectivity;						//!< stored edge connectivity for fast shadow edge extraction, could be 0, call ->Release() to free it
+
+	TFixedArray<unsigned short>		m_arrIndices;										//!<
+	unsigned											m_nNumVertices;									//!< number of vertices in SystemBuffer
+
+	//!
+	//! /param nNumIndices
+	//! /param nNumVertices
+	void PrepareShadowVolumeVertexBuffer( unsigned nNumIndices, unsigned nNumVertices );
+
+	//shadow volume renderer vertex buffer
+  Vec3d * m_pSystemVertexBuffer;
+};
+
+struct ItShadowVolume;
+//////////////////////////////////////////////////////////////////////
+struct tShadowVolume : public ItShadowVolume
+{
+	tShadowVolume()
+	{
+		pSvObj=NULL;
+	}
+
+	CShadowVolObject *GetShadowVolume()
+	{
+		return (pSvObj);
+	}
+
+	void SetShadowVolume(CShadowVolObject *pParmSvObj)
+	{
+		pSvObj=pParmSvObj;
+	}
+
+	void	Release()
+	{
+		if (pSvObj)
+		{
+			delete pSvObj;
+			pSvObj=NULL;
+		}
+
+		delete this;
+	}
+
+	//! get/set position
+	Vec3d GetPos()
+	{
+		return (pSvObj->GetPos());
+	}
+
+	void SetPos(const Vec3d &vPos)
+	{
+		pSvObj->SetPos(vPos);
+	}
+
+	//! recalculate the object's silouhette, mostly for dynamic lights
+	//! the light should always be in object space
+	void	RebuildShadowVolumeBuffer( const CDLight &lSource, float fExtent )
+	{
+		pSvObj->RebuildShadowVolumeBuffer(lSource, fExtent);
+	}
+
+  Vec3d * GetSysVertBufer() { return pSvObj->GetSysVertBufer(); }
+
+  void CheckUnload() { pSvObj->CheckUnload(); }
+
+	CShadowVolObject *pSvObj;	
+};
+
+#endif