Cleaning code

resources/shaders/objects/sphere.frag

@@ -0,0 +1,7 @@
+/**
+ * Compute the Signed Distance Function (SDF)
+ * of a sphere.
+ */
+float SphereSDF(vec3 ray_position, vec3 sphere_position, float radius){
+	return(length(ray_position - sphere_position)-radius);
+}

resources/shaders/objects/sphere.glsl

@@ -1,4 +0,0 @@
-
-float Sphere(vec3 ray_position, vec3 sphere_position){
-	
-}