Adjust specular calculation in the Phong shader

[libs/gl.git] / shaderlib / phong.glsl

diff --git a/shaderlib/phong.glsl b/shaderlib/phong.glsl
index 482f895b44e3e80e50e92586a5c2144319b110c7..570024ab1b5aaa27f22c8796a05d2353c8349511 100644 (file)
--- a/shaderlib/phong.glsl
+++ b/shaderlib/phong.glsl
@@ -85,10 +85,8 @@ vec3 phong_one_light(vec3 light, vec3 normal, vec3 look, vec3 light_color, vec3
        vec3 color = light_color*surface_diffuse*diffuse_intensity;
        if(use_specular)
        {
-               /* The light vector points towards the light, so reflected will point
-               towards the surface - but so does the look vector. */
-               vec3 reflected = reflect(light, normal);
-               float specular_intensity = pow(max(dot(reflected, look), 0.0), shininess);
+               vec3 reflected = reflect(look, normal);
+               float specular_intensity = pow(max(dot(reflected, light), 0.0), shininess);
                color += light_color*surface_specular*specular_intensity;
        }
        return color;