www.pudn.com > simpleraytracer_v1_0.zip > raysphere.h

/*=================================================================== 
 
   
  digital liberation front 2002 
   
  _______    ______      _______ 
 /______/\  |______|    /\______\   
|       \ \ |      |   / /       |     
|	      \| |      |  |/         |   
|_____    \ |      |_ /    ______|        
 ____|    | |      |_||    |_____           
     |____| |________||____|                 
            
 
 
 
Code by Nicholas Chapman[/ Ono-Sendai] 
nickamy@paradise.net.nz 
 
You may use this code for any non-commercial project, 
as long as you do not remove this description. 
 
You may not use this code for any commercial project. 
====================================================================*/ 
#ifndef __RAYSPHERE_H__ 
#define __RAYSPHERE_H__ 
 
#include "geometry.h" 
#include "../maths/vec3.h" 
 
 
class RaySphere : public Geometry 
{ 
public: 
	RaySphere(const Vec3& pos_, float radius_) 
	{ 
		centerpos = pos_; 
		radius = radius_; 
		radius_squared = radius_ * radius_; 
		recip_radius = 1.0f / radius; 
	} 
 
	~RaySphere(){} 
 
 
 
	//returns negative number if object not hit by the ray 
	virtual float getDistanceUntilHit(const Ray& ray) const; 
 
 
	virtual const Vec3 getNormalForPos(const Vec3& pos) const; 
 
 
	Vec3 centerpos; 
 
private: 
 
	float radius; 
 
	//stuff below is precomputed for efficiency 
	float radius_squared; 
	float recip_radius; 
}; 
 
 
 
 
 
#endif //__RAYSPHERE_H__