diff -r 79b516a3803d -r 76b7bd51d64a src/raytracer.cc
--- a/src/raytracer.cc	Fri Nov 30 00:44:51 2007 +0100
+++ b/src/raytracer.cc	Mon Dec 03 01:49:23 2007 +0100
@@ -15,9 +15,9 @@
 
 // Hammersley spherical point distribution
 // http://www.cse.cuhk.edu.hk/~ttwong/papers/udpoint/udpoints.html
-Vector3 Raytracer::SphereDistribute(int i, int n, float extent, Vector3 &normal)
+Vector3 Raytracer::SphereDistribute(int i, int n, Float extent, Vector3 &normal)
 {
-	float p, t, st, phi, phirad;
+	Float p, t, st, phi, phirad;
 	int kk;
 
 	t = 0;
@@ -31,7 +31,7 @@
 
 	st = sqrt(1.0 - t*t);
 
-	float x, y, z, xx, yy, zz, q;
+	Float x, y, z, xx, yy, zz, q;
 	x = st * cos(phirad);
 	y = st * sin(phirad);
 	z = t;
@@ -75,8 +75,8 @@
 	Colour I = Colour();
 	Vector3 L = light.pos - P;
 	L.normalize();
-	float L_dot_N = dot(L, N);
-	float R_dot_V = dot(R, V);
+	Float L_dot_N = dot(L, N);
+	Float R_dot_V = dot(R, V);
 
 	Colour col = mat.texture.colour; //mat.texture.evaluate(P);
 
@@ -91,7 +91,7 @@
 
 Colour Raytracer::raytrace(Ray &ray, int depth, Shape *origin_shape)
 {
-	float nearest_distance = FLT_MAX; //Infinity
+	Float nearest_distance = Inf;
 	Shape *nearest_shape = top->nearest_intersection(origin_shape, ray, nearest_distance);
 
 	if (nearest_shape == NULL) {
@@ -106,12 +106,12 @@
 		for (light = lights.begin(); light != lights.end(); light++) {
 			Vector3 jo, L = (*light)->pos - P; // direction vector to light
 			L.normalize();
-			float L_dot_N = dot(L, normal);
+			Float L_dot_N = dot(L, normal);
 			if (L_dot_N > 0) {
 				// test if this light is occluded (sharp shadows)
 				if ((*light)->cast_shadows) {
 					Ray shadow_ray = Ray(P, L);
-					float dist = FLT_MAX;
+					Float dist = FLT_MAX;
 					if (top->nearest_intersection(nearest_shape, shadow_ray, dist))
 						continue;
 				}
@@ -137,18 +137,18 @@
 		// ambient occlusion
 		if (ao_samples)
 		{
-			float miss = 0;
+			Float miss = 0;
 			for (int i = 0; i < ao_samples; i++) {
 				Vector3 dir = SphereDistribute(i, ao_samples, ao_angle, normal);
 				Ray ao_ray = Ray(P, dir);
-				float dist = ao_distance;
+				Float dist = ao_distance;
 				Shape *shape_in_way = top->nearest_intersection(nearest_shape, ao_ray, dist);
 				if (shape_in_way == NULL)
 					miss += 1.0;
 				else
 					miss += dist / ao_distance;
 			}
-			float ao_intensity = miss / ao_samples;
+			Float ao_intensity = miss / ao_samples;
 			acc = acc * ao_intensity;
 		}
 
@@ -160,7 +160,7 @@
 {
 	RenderrowData *d = (RenderrowData*) data;
 	int subsample = d->rt->getSubsample();
-	float subsample2 = 1.0/(subsample*subsample);
+	Float subsample2 = 1.0/(subsample*subsample);
 	int ww = d->w*3;
 	Vector3 dir = d->dfix;
 	for (int x = 0; x < d->w; x += subsample) {
@@ -171,8 +171,8 @@
 
 		for (int i = 0; i < 5; i++)
 		{
-			float osax[] = {0.0, -0.4, +0.4, +0.4, -0.4};
-			float osay[] = {0.0, -0.4, -0.4, +0.4, +0.4};
+			Float osax[] = {0.0, -0.4, +0.4, +0.4, -0.4};
+			Float osay[] = {0.0, -0.4, -0.4, +0.4, +0.4};
 			Vector3 tmpdir = dir + osax[i]*d->dx + osay[i]*d->dy;
 			tmpdir.normalize();
 			Ray ray(d->eye, tmpdir);
@@ -204,14 +204,14 @@
 			ray.dir = tmpdir;
 			Colour c3 = d->rt->raytrace(ray, 0, NULL);
 			// are the colors similar?
-			float m = (c-c2).mag2();
+			Float m = (c-c2).mag2();
 			m = max(m, (c2-c3).mag2());
 			m = max(m, (c3-c4).mag2());
 			m = max(m, (c4-c).mag2());
 			if (m < 0.001)
 			{
 				// interpolate
-				float *i = d->iter;
+				Float *i = d->iter;
 				for (int x = 0; x < subsample; x++)
 				{
 					for (int y = 0; y < subsample; y++)
@@ -302,14 +302,14 @@
 	return (void *)d;
 }
 
-void Raytracer::render(int w, int h, float *buffer)
+void Raytracer::render(int w, int h, Float *buffer)
 {
 	if (!camera || !top || !buffer)
 		return;
 
 	RenderrowData *d;
 
-	float S = 0.5/w;
+	Float S = 0.5/w;
 	Vector3 dfix = camera->u*(-w/2.0*S/camera->f)
 		+ camera->v*(h/2.0*S/camera->f) + camera->p;
 	Vector3 dx = camera->u * (S/camera->f);
@@ -372,7 +372,7 @@
 	lights.push_back(light);
 }
 
-void Raytracer::ambientocclusion(int samples, float distance, float angle)
+void Raytracer::ambientocclusion(int samples, Float distance, Float angle)
 {
 	ao_samples = samples;
 	ao_distance = distance;