Reveting to an older build. Something on the mac build stopped my card from running it.

Added camera class
Added a create_buffer method
Cleaned up much of the main function
Added Vector4 class, ported from sf::Vector3
Various other edits

kernels/minimal_kernel.cl

@@ -1,15 +1,15 @@
 
 
-uint4 white_light(uint4 input, float3 light, int3 mask) {
+float4 white_light(float4 input, float3 light, int3 mask) {
 
 	input.w = input.w + acos(
 		dot(
 			normalize(light),
 			normalize(fabs(convert_float3(mask)))
 			)
-		) * 50;
+		) / 2;
 
-	return (input);
+	return input;
 
 }
 
@@ -25,34 +25,30 @@ __kernel void min_kern(
         __write_only image2d_t image
 ){
 
-    // Get the pixel position of this worker
     size_t id = get_global_id(0);
     int2 pixel = {id % resolution->x, id / resolution->x};
-
-
-    // Slew the ray into it's correct position based on the view matrix's starting position
-    // and the camera's current direction
-
     float3 ray_dir = projection_matrix[pixel.x + resolution->x * pixel.y];
 
-    // Yaw
     ray_dir = (float3)(
             ray_dir.z * sin(cam_dir->y) + ray_dir.x * cos(cam_dir->y),
             ray_dir.y,
             ray_dir.z * cos(cam_dir->y) - ray_dir.x * sin(cam_dir->y)
     );
 
-    // Pitch
     ray_dir = (float3)(
-          ray_dir.x * cos(cam_dir->z) - ray_dir.y * sin(cam_dir->z),
-          ray_dir.x * sin(cam_dir->z) + ray_dir.y * cos(cam_dir->z),
-          ray_dir.z
+            ray_dir.x * cos(cam_dir->z) - ray_dir.y * sin(cam_dir->z),
+            ray_dir.x * sin(cam_dir->z) + ray_dir.y * cos(cam_dir->z),
+            ray_dir.z
     );
 
     // Setup the voxel step based on what direction the ray is pointing
     int3 voxel_step = {1, 1, 1};
 	voxel_step *= (ray_dir > 0) - (ray_dir < 0);
 
+    /*voxel_step.x *= (ray_dir.x > 0) - (ray_dir.x < 0);
+    voxel_step.y *= (ray_dir.y > 0) - (ray_dir.y < 0);
+    voxel_step.z *= (ray_dir.z > 0) - (ray_dir.z < 0);*/
+
     // Setup the voxel coords from the camera origin
 	int3 voxel = convert_int3(*cam_pos);
 
@@ -64,26 +60,21 @@ __kernel void min_kern(
     // for all 3 axis XYZ.
 	float3 intersection_t = delta_t;
 
-    // Create a psuedo random number for view fog
 	int2 randoms = { 3, 14 };
 	uint seed = randoms.x + id;
 	uint t = seed ^ (seed << 11);
 	uint result = randoms.y ^ (randoms.y >> 19) ^ (t ^ (t >> 8));
 
-    // Distance a ray can travel before it terminates
-	int max_dist = 200 + result % 50;
+	int max_dist = 500 + result % 50;
 	int dist = 0;
 
-    // Bitmask to keep track of which axis was tripped
 	int3 mask = { 0, 0, 0 };
 
     // Andrew Woo's raycasting algo
     do {
 
-        // Non-branching test of the lowest delta_t value
 		mask = intersection_t.xyz <= min(intersection_t.yzx, intersection_t.zxy);
-
-		// Based on the result increment the voxel and intersection
+		float3 thing = delta_t * fabs(convert_float3(mask.xyz));
 		intersection_t += delta_t * fabs(convert_float3(mask.xyz));
 		voxel.xyz += voxel_step.xyz * mask.xyz;
 
@@ -91,15 +82,12 @@ __kernel void min_kern(
 		int3 overshoot = voxel <= *map_dim;
 		int3 undershoot = voxel > 0;
 
-        // "Sky"
 		if (overshoot.x == 0 || overshoot.y == 0 || overshoot.z == 0 || undershoot.x == 0 || undershoot.y == 0){
-			write_imageui(image, pixel, (uint4)(135, 206, 235, 255));
+			write_imagef(image, pixel, (float4)(.73, .81, .89, 1.0));
 			return;
 		}
-
-		// "Water"
 		if (undershoot.z == 0) {
-			write_imageui(image, pixel, (uint4)(64, 164, 223, 255));
+			write_imagef(image, pixel, (float4)(.14, .30, .50, 1.0));
 			return;
 		}
 
@@ -110,23 +98,23 @@ __kernel void min_kern(
 		if (voxel_data != 0) {
 			switch (voxel_data) {
 			case 1:
-				write_imageui(image, pixel, (uint4)(50, 0, 0, 255));
+				write_imagef(image, pixel, (float4)(.50, .00, .00, 1));
 				return;
 			case 2:
-				write_imageui(image, pixel, (uint4)(0, 50, 40, 255));
+				write_imagef(image, pixel, (float4)(.00, .50, .40, 1.00));
 				return;
 			case 3:
-				write_imageui(image, pixel, (uint4)(0, 0, 50, 255));
+				write_imagef(image, pixel, (float4)(.00, .00, .50, 1.00));
 				return;
 			case 4:
-				write_imageui(image, pixel, (uint4)(25, 0, 25, 255));
+				write_imagef(image, pixel, (float4)(.25, .00, .25, 1.00));
 				return;
 			case 5:
-				//write_imageui(image, pixel, (uint4)(200, 200, 200, 255));
-				write_imageui(image, pixel, white_light((uint4)(44, 176, 55, 100), (float3)(lights[7], lights[8], lights[9]), mask));
+				//write_imagef(image, pixel, (float4)(.25, .00, .25, 1.00));
+				write_imagef(image, pixel, white_light((float4)(.25, .32, .14, 0.2), (float3)(lights[7], lights[8], lights[9]), mask));
 				return;
 			case 6:
-				write_imageui(image, pixel, (uint4)(30, 80, 10, 255));
+				write_imagef(image, pixel, (float4)(.30, .80, .10, 1.00));
 				return;
 			}
 		}
@@ -134,6 +122,6 @@ __kernel void min_kern(
         dist++;
     } while (dist < max_dist);
 
-    write_imageui(image, pixel, (uint4)(135, 206, 235, 255));
+    write_imagef(image, pixel, (float4)(.73, .81, .89, 1.0));
     return;
 }