X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=shaderlib%2Fcooktorrance.glsl;h=4b0c4dc814ca5b16e903d7003f1371b96b3c6503;hb=9208e0ff263a287e456e082a4a8b8fd0bbd41f9e;hp=f8aed8267273fcb4f1ac97c929e3823ba29dbcb0;hpb=e05c77d2e3582a6962f42dcec0fc5f7845ff448d;p=libs%2Fgl.git

diff --git a/shaderlib/cooktorrance.glsl b/shaderlib/cooktorrance.glsl
index f8aed826..4b0c4dc8 100644
--- a/shaderlib/cooktorrance.glsl
+++ b/shaderlib/cooktorrance.glsl
@@ -28,8 +28,7 @@ layout(constant_id=auto) const bool use_roughness_map = false;
 layout(constant_id=auto) const bool use_occlusion_map = false;
 layout(constant_id=auto) const bool use_emission = false;
 layout(constant_id=auto) const bool use_emission_map = false;
-
-const float PI = 3.1415926535;
+layout(constant_id=auto) const bool use_image_based_lighting = false;
 
 #pragma MSP stage(fragment)
 virtual vec4 get_base_color()
@@ -139,7 +138,15 @@ vec3 cooktorrance_environment(vec3 normal, vec3 look, vec3 base_color, float met
 	vec3 k_spec = f0*scale_bias.x+scale_bias.y;
 	vec3 k_diff = (1.0-k_spec)*(1.0-metalness);
 
-	return (k_diff*base_color+k_spec)*ambient_color.rgb;
+	if(use_image_based_lighting)
+	{
+		vec3 irradiance = get_irradiance_sample(normal);
+		vec3 reflection = get_environment_sample(reflect(look, normal), roughness).rgb;
+
+		return k_diff*irradiance*base_color+k_spec*reflection;
+	}
+	else
+		return (k_diff*base_color+k_spec)*ambient_color.rgb;
 }
 
 vec3 cooktorrance_lighting(vec3 normal, vec3 look, vec3 base_color, float metalness, float roughness)