205 

   205 

   206 Triangle::Triangle(Vertex *aA, Vertex *aB, Vertex *aC, Material *amaterial)

   206 Triangle::Triangle(Vertex *aA, Vertex *aB, Vertex *aC, Material *amaterial)

   207 	: smooth(false), A(aA), B(aB), C(aC)

   207 	: smooth(false), A(aA), B(aB), C(aC)

   208 {

   208 {

   209 	material = amaterial;

   209 	material = amaterial;

   211 

   210 

   212 	const Vector3 c = B->P - A->P;

   211 	const Vector3 c = B->P - A->P;

   213 	const Vector3 b = C->P - A->P;

   212 	const Vector3 b = C->P - A->P;

   214 

   213 

   215 	N = cross(c, b);

   214 	N = cross(c, b);