opengl 3.3 renderer shaders

shaders/envmapping.glsl

@@ -0,0 +1,15 @@
+#if ENVMAP_ENABLED
+uniform samplerCube envmap;
+#endif
+
+vec3 envmap_color( vec3 normal )
+{
+#if ENVMAP_ENABLED
+	vec3 refvec = reflect(f_pos.xyz, normal); // view space
+	refvec = vec3(inv_view * vec4(refvec, 0.0)); // world space
+	vec3 envcolor = texture(envmap, refvec).rgb;
+#else
+	vec3 envcolor = vec3(0.5);
+#endif
+	return envcolor;
+}