diff -r fc18ac4833f2 -r a0a3e334744f src/raytracer.cc
--- a/src/raytracer.cc	Sun Nov 25 15:50:01 2007 +0100
+++ b/src/raytracer.cc	Sun Nov 25 17:58:29 2007 +0100
@@ -99,7 +99,7 @@
 		return bg_colour;
 	} else {
 		Colour acc = Colour();
-		Vector3 P = ray.a + ray.dir * nearest_distance; // point of intersection
+		Vector3 P = ray.o + ray.dir * nearest_distance; // point of intersection
 		Vector3 normal = nearest_shape->normal(P);
 		acc = PhongShader_ambient(*nearest_shape->material, P);
 
@@ -211,17 +211,13 @@
 	RenderrowData *d;
 
 	printf("* building kd-tree\n");
-	//cout << endl;
 	top->optimize();
-	//static_cast<KdTree*>(top)->save(cout);
-	//cout << endl;
 
 	//srand(time(NULL));
 
-	// eye - viewing point
+	/* eye - viewing point */
 	Vector3 eye(0, 0, -5);
 
-	// for each pixel...
 	vy = starty;
 
 #ifdef PTHREADS
@@ -233,6 +229,7 @@
 	int t = 0;
 #endif
 
+	/* for each pixel... */
 	printf("* rendering row   0 (  0%% done)");
 	for (int y = 0; y < h; y++) {
 		d = (RenderrowData*) malloc(sizeof(RenderrowData));