class cRay
{
public:
	cVector start,dir;
	float distmult;

	cRay()
	{
		start = Vector::O;
		dir = Vector::Z;
		distmult=1.0f;
	}

	cRay(cVector &pstart, cVector &pdir, float dm)
	{
		setTo(pstart,pdir,dm);
	}

	void setTo(cVector &pstart, cVector &pdir, float dm)
	{
		start = pstart;
		dir = Vector::normalize(pdir);
		distmult = dm;
	}
	cRay copy() 
	{
		return cRay(start.copy(),dir.copy(),distmult);
	}

	void toString() 
	{
		printf("Ray from:\n");
		start.toString();
		printf("in the direction of:\n");
		dir.toString();
	}
	void transform(cTransform &trans) 
	{
		start = Transform::transformed(trans,start,false);
		dir = Transform::transformed(trans,dir,true);
		float dirlength = dir.length();
		distmult = distmult/dirlength;
		dir = Vector::scalar(dir,1.0f/dirlength); // (normalize)
	}

	cRay transformed(cTransform &trans) 
	{
		cRay toreturn = copy();
		toreturn.distmult = 1.0f;
		toreturn.transform(trans);
		return toreturn;
	}
};