Initial commit: client source

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+///////////////////////////////////////////////////////////////////////  
+//	CSpeedGrassRT Class
+//
+//	(c) 2003 IDV, Inc.
+//
+//	*** INTERACTIVE DATA VISUALIZATION (IDV) PROPRIETARY INFORMATION ***
+//
+//	This software is supplied under the terms of a license agreement or
+//	nondisclosure agreement with Interactive Data Visualization and may
+//	not be copied or disclosed except in accordance with the terms of
+//	that agreement.
+//
+//      Copyright (c) 2001-2003 IDV, Inc.
+//      All Rights Reserved.
+//
+//		IDV, Inc.
+//		1233 Washington St. Suite 610
+//		Columbia, SC 29201
+//		Voice: (803) 799-1699
+//		Fax:   (803) 931-0320
+//		Web:   http://www.idvinc.com
+
+#pragma once
+
+//#include <vector>
+//#include "Constants.h"
+//#include "../Common Source/IdvVertexBuffer.h"
+
+#ifdef USE_SPEEDGRASS
+
+
+// forward reference
+class CIdvTerrain;
+
+
+///////////////////////////////////////////////////////////////////////  
+//	class CSpeedGrassRT declaration
+
+class CSpeedGrassRT
+{
+public:
+		CSpeedGrassRT( );
+		virtual ~CSpeedGrassRT( );
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  struct SBlade
+
+		struct SBlade
+		{
+			SBlade( );
+
+			// geometry
+			float				m_afPos[3];
+			float				m_afNormal[3];
+			float				m_fSize;
+			unsigned char		m_ucWhichTexture;
+
+			// wind
+			float				m_fNoise;
+			float				m_fThrow;
+
+			// color
+			float				m_afBottomColor[3];
+			float				m_afTopColor[3];
+		};
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  struct SRegion
+
+		struct SRegion
+		{
+			SRegion( );
+
+			// dimensions
+			float				m_afCenter[3];
+			float				m_afMin[3];
+			float				m_afMax[3];
+
+			// culling
+			bool				m_bCulled;
+			float				m_fCullingRadius;
+
+			// grass/brush blades
+			std::vector<SBlade>	m_vBlades;
+// 			CIdvVertexBuffer*	m_pVertexBuffer;
+			CGraphicVertexBuffer	m_VertexBuffer;
+		};
+
+		void				DeleteRegions(void);
+		const SRegion*		GetRegions(unsigned int& uiNumRegions);
+		bool				ParseBsfFile(const char* pFilename, unsigned int nNumBlades, unsigned int uiRows, unsigned int uiCols, float fCollisionDistance = 0.0f);
+		bool				CustomPlacement(unsigned int uiRows, unsigned int uiCols);
+
+		//////////////////////////////////////////////////////////////////////////
+		// Utility
+static	void				RotateAxisFromIdentity(D3DXMATRIX * pMat, const float & c_fAngle, const D3DXVECTOR3 & c_rv3Axis);
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  Geometry
+
+static	const float*		GetUnitBillboard(void)											{ return m_afUnitBillboard; }
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  LOD
+
+static  void		        GetLodParams(float& fFarDistance, float& fTransitionLength);
+static  void		        SetLodParams(float fFarDistance, float fTransitionLength);
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  Culling
+
+		bool				AllRegionsAreCulled(void) const									{ return m_bAllRegionsCulled; }
+		void				Cull(void);
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  Wind
+
+static	void				SetWindDirection(const float* pWindDir);
+static	const float*		GetWindDirection(void);
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  Camera
+
+static  const float*		GetCameraPos(void);
+static  void                SetCamera(const float* pPosition, const double* pModelviewMatrix);
+static	void				SetPerspective(float fAspectRatio, float fFieldOfView);
+
+
+        ///////////////////////////////////////////////////////////////////////  
+        //  Terrain hugging
+
+virtual float				Color(float fX, float fY, const float* pNormal, float* pTopColor, float* pBottomColor) const { return 0.0f; }	
+virtual float				Height(float fX, float fY, float* pNormal) const { return 0.0f; }	
+
+protected:
+
+		void				CreateRegions(const std::vector<SBlade>& vSceneBlades, float fCollisionDistance = 0.0f);
+static	void				ComputeFrustum(void);
+static	void				ComputeUnitBillboard(void);
+		void				ConvertCoordsToCell(const float* pCoords, int* pGridCoords) const;
+		unsigned int		GetRegionIndex(unsigned int uiRow, unsigned int uiCol) const	{ return uiRow * m_nNumRegionCols + uiCol; }
+static	bool				OutsideFrustum(SRegion* pRegion);
+
+		// general
+static	float				m_fLodFarDistance;
+static	float				m_fLodTransitionLength;
+static	float				m_afUnitBillboard[12];
+static	float				m_afWindDir[4];
+
+		// regions
+		int					m_nNumRegions;
+		int					m_nNumRegionCols;
+		int					m_nNumRegionRows;
+		SRegion*			m_pRegions;
+
+		// camera
+static	float				m_afCameraOut[3];
+static	float				m_afCameraRight[3];
+static	float				m_afCameraUp[3];
+static	float				m_afCameraPos[3];
+static	float				m_fFieldOfView;
+static	float				m_fAspectRatio;
+
+		// culling
+static	float				m_afFrustumBox[6];
+static	float				m_afFrustumMin[2];
+static	float				m_afFrustumMax[2];
+static	float				m_afFrustumPlanes[5][4];
+		float				m_afBoundingBox[6];
+		bool				m_bAllRegionsCulled;
+};
+
+extern float VecInterpolate(float fStart, float fEnd, float fPercent);
+#endif // USE_SPEEDGRASS