Began work on post processing

src__/ray/ray.glsl

@@ -0,0 +1,28 @@
+//Contains the definision of a ray and step functions
+struct Ray {
+    ivec3 pos;
+    vec3 innerPos;
+
+    vec3 dir;
+    vec3 invDir;
+};
+
+Ray ray;
+void setup(vec3 origin, vec3 direction) {
+    ray.pos = ivec3(origin);
+    ray.innerPos = origin - ray.pos;
+    direction *= inversesqrt(direction);
+    ray.dir = direction;
+    ray.invDir = 1/direction;
+}
+
+void step(ivec3 aabb) {
+    //TODO:check for innerPos>=1 and step into that voxel
+    vec3 t2f = (aabb - ray.innerPos) * ray.invDir;
+    float mint2f = min(t2f.x, min(t2f.y, t2f.z));
+    bvec3 msk = lessThanEqual(t2f.xyz, vec3(mint2f));
+    vec3 newIP = mint2f * ray.dir + ray.innerPos;
+    ivec3 offset = min(aabb-1, ivec3(newIP));
+    ray.pos += offset + ivec3(msk);
+    ray.innerPos = mix(vec3(0), newIP - offset, not(msk));
+}