~ | Even more optimizing

shaders/compute.glsl

@@ -123,6 +123,7 @@ struct Ray
 {
 	vec3 origin;
 	vec3 direction;
+	vec3 inv_direction;
 };
 
 struct hitInfo
@@ -211,7 +212,7 @@ Ray initRay(vec2 uv, inout uint rng_state)
 	origin += right * lens_point.x + up * lens_point.y;
 	ray_direction = normalize(focal_point - origin);
 
-	return (Ray(origin, ray_direction));
+	return (Ray(origin, ray_direction, 1.0 / ray_direction));
 }
 
 void main()

shaders/debug.glsl

@@ -207,7 +207,7 @@ Ray initRay(vec2 uv)
 	vec3 view_space_ray = normalize(vec3(uv.x, uv.y, -focal_length));
 	vec3 ray_direction = normalize((inverse(camera.view_matrix) * vec4(view_space_ray, 0.0)).xyz);
 
-	return (Ray(origin, ray_direction));
+	return (Ray(origin, ray_direction, (1.0 / ray_direction)));
 }
 
 vec3 debugColor(vec2 uv)

shaders/intersect.glsl

@@ -227,18 +227,18 @@ bool intersect(Ray ray, GPUObject obj, out hitInfo hit)
 
 bool intersectRayBVH(Ray ray, GPUBvh node, inout hitInfo hit)
 {
-    vec3 invDir = 1.0 / ray.direction;
-    
-    vec3 t1 = (node.min - ray.origin) * invDir;
-    vec3 t2 = (node.max - ray.origin) * invDir;
+	// vec3 inv_direction = 1.0 / ray.direction;
+
+    vec3 t1 = (node.min - ray.origin) * ray.inv_direction;
+    vec3 t2 = (node.max - ray.origin) * ray.inv_direction;
     
     vec3 tMin = min(t1, t2);
     vec3 tMax = max(t1, t2);
     
     hit.t = max(max(tMin.x, tMin.y), tMin.z);
-    hit.last_t = min(min(tMax.x, tMax.y), tMax.z);
+    float last_t = min(min(tMax.x, tMax.y), tMax.z);
     
-    return hit.t <= hit.last_t && hit.last_t >= 0.0;
+    return (hit.t <= last_t && last_t >= 0.0);
 }
 
 

shaders/light.glsl

@@ -34,7 +34,7 @@ vec3 sampleSphereLight(vec3 position, GPUObject obj, int light_index, GPUMateria
     vec3 light_dir = normalize(sample_point - position);
     float light_dist = length(sample_point - position);
     
-    Ray shadow_ray = Ray(position + light_dir * 0.001, light_dir);
+    Ray shadow_ray = Ray(position + light_dir * 0.001, light_dir, (1.0 / light_dir));
     hitInfo shadow_hit = traceRay(shadow_ray);
     
     if (shadow_hit.obj_index != light_index)
@@ -53,7 +53,7 @@ vec3 sampleQuadLight(vec3 position, GPUObject obj, int light_index, GPUMaterial
     vec3 light_dir = normalize(sample_point - position);
     float light_dist = length(sample_point - position);
     
-    Ray shadow_ray = Ray(position + light_dir * 0.001, light_dir);
+    Ray shadow_ray = Ray(position + light_dir * 0.001, light_dir, (1.0 / light_dir));
     hitInfo shadow_hit = traceRay(shadow_ray);
     
     if (shadow_hit.obj_index != light_index)
@@ -82,7 +82,7 @@ vec3	sampleLights(vec3 position, inout uint rng_state)
         vec3 light_dir = normalize(obj.position - position);
         float light_dist = length(obj.position - position);
 
-        Ray shadow_ray = Ray(position + light_dir * 0.01, light_dir);
+        Ray shadow_ray = Ray(position + light_dir * 0.01, light_dir, (1.0 / light_dir));
         hitInfo shadow_hit = traceRay(shadow_ray);
 
         if (shadow_hit.obj_index == light_index)

shaders/trace.glsl

@@ -64,7 +64,7 @@ hitInfo	traceBVH(Ray ray)
     int stack[32];
     int stack_ptr = 0;
     stack[0] = 0;
-    
+
     while (stack_ptr >= 0)
     {
         int current_index = stack[stack_ptr--];