123

Editor/TerrainGrid.h

@@ -0,0 +1,105 @@
+////////////////////////////////////////////////////////////////////////////
+//
+//  Crytek Engine Source File.
+//  Copyright (C), Crytek Studios, 2002.
+// -------------------------------------------------------------------------
+//  File name:   terraingrid.h
+//  Version:     v1.00
+//  Created:     14/10/2002 by Timur.
+//  Compilers:   Visual Studio.NET
+//  Description: 
+// -------------------------------------------------------------------------
+//  History:
+//
+////////////////////////////////////////////////////////////////////////////
+
+#ifndef __terraingrid_h__
+#define __terraingrid_h__
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+class CHeightmap;
+
+class CTerrainTexGen;
+
+/** Represent single terrain sector.
+*/
+class CTerrainSector
+{
+public:
+	CTerrainSector()
+	{
+		textureId = 0;
+	}
+
+public:
+	//! Id of surface texture.
+	unsigned int textureId;
+};
+
+/** Manages grid of terrain sectors.
+*/
+class CTerrainGrid
+{
+public:
+	CTerrainGrid( CHeightmap* heightmap );
+	~CTerrainGrid();
+
+	//! Initialize grid.
+	void InitSectorGrid( int numSectors );
+	
+	//! Set target texture resolution.
+	void SetResolution( int resolution );
+
+	//! Clear all sectors.
+	void ReleaseSectorGrid();
+
+	//! Get terrain sector.
+	CTerrainSector* GetSector( CPoint sector );
+
+	//! Lock texture of sector and return texture id.
+	int LockSectorTexture( CPoint sector,CTerrainTexGen &texGen,int genFlags );
+
+	//////////////////////////////////////////////////////////////////////////
+	// Coordinate conversions.
+	//////////////////////////////////////////////////////////////////////////
+	void GetSectorRect( CPoint sector,CRect &rect );
+	//! Map from sector coordinates to texture coordinates.
+	CPoint SectorToTexture( CPoint sector );
+	//! Map world position to sector space.
+	CPoint WorldToSector( const Vec3 &wp );
+	//! Map sector coordinates to world coordinates.
+	Vec3 SectorToWorld( CPoint sector );
+	//! Map world position to texture space.
+	CPoint WorldToTexture( const Vec3 &wp );
+
+	//! Return number of sectors per side.
+	int GetNumSectors() const { return m_numSectors; }
+
+
+private:
+	//! Heightmap for this terrain.
+	CHeightmap *m_heightmap;
+
+	//! Sector grid.
+	std::vector<CTerrainSector*> m_sectorGrid;
+
+	//! Number of sectors per side.
+	int m_numSectors;
+	
+	//! Resolution of texture and heightmap.
+	int m_resolution;
+
+	//! Sector texture size.
+	int m_sectorResolution;
+
+	//! Size of sector in meters.
+	int m_sectorSize;
+
+	//! Texture Pixels per meter.
+	float m_pixelsPerMeter;
+};
+
+#endif // __terraingrid_h__