www.pudn.com > simpleraytracer_v1_0.zip > rayplane.cpp

/*=================================================================== 
 
   
  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. 
====================================================================*/ 
#include "rayplane.h" 
 
#include "ray.h" 
 
 
 
RayPlane::RayPlane(const Plane& plane_) 
:	plane(plane_) 
{ 
	 
} 
 
float RayPlane::getDistanceUntilHit(const Ray& ray) const 
{ 
	//NOTE: deal with div by 0? 
 
	return (ray.startpos.dot(plane.getNormal()) - plane.getDist()) /  
			-dot(plane.getNormal(), ray.unitdir); 
}