52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Name: HFTracer.h
|
|
// Author: Rich Cross
|
|
// Contact: rich@wildfiregames.com
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef _HFTRACER_H
|
|
#define _HFTRACER_H
|
|
|
|
class CVector3D;
|
|
class CTerrain;
|
|
|
|
#include "lib/types.h"
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// CHFTracer: a class for determining ray intersections with a heightfield
|
|
class CHFTracer
|
|
{
|
|
public:
|
|
// constructor; setup data
|
|
CHFTracer(CTerrain *pTerrain);
|
|
|
|
// intersect ray with this heightfield; return true if intersection
|
|
// occurs (and fill in grid coordinates and point of intersection), or false otherwise
|
|
bool RayIntersect(CVector3D& origin,CVector3D& dir,int& x,int& z,CVector3D& ipt) const;
|
|
|
|
private:
|
|
// intersect a ray with triangle defined by vertices
|
|
// v0,v1,v2; return true if ray hits triangle at distance less than dist,
|
|
// or false otherwise
|
|
bool RayTriIntersect(const CVector3D& v0,const CVector3D& v1,const CVector3D& v2,
|
|
const CVector3D& origin,const CVector3D& dir,float& dist) const;
|
|
|
|
// test if ray intersects either of the triangles in the given
|
|
bool CellIntersect(int cx,int cz,CVector3D& origin,CVector3D& dir,float& dist) const;
|
|
|
|
// The terrain we're operating on
|
|
CTerrain *m_pTerrain;
|
|
// the heightfield were tracing
|
|
const u16* m_Heightfield;
|
|
// size of the heightfield
|
|
u32 m_MapSize;
|
|
// cell size - size of each cell in x and z
|
|
float m_CellSize;
|
|
// vertical scale - size of each cell in y
|
|
float m_HeightScale;
|
|
};
|
|
|
|
#endif
|