//
// Fragment shader for cube map environment mapping
//
// Author: Randi Rost
//
// Copyright (c) 2003-2006: 3Dlabs, Inc.
//
// See 3Dlabs-License.txt for license information
//

uniform vec3  BaseColor;
uniform float MixRatio;

uniform samplerCube EnvMap;

varying vec3  ReflectDir;
varying float LightIntensity;

void main()
{
    // Look up environment map value in cube map

    vec3 envColor = vec3(textureCube(EnvMap, ReflectDir));

    // Add lighting to base color and mix

    vec3 base = LightIntensity * BaseColor;
    envColor  = mix(envColor, base, MixRatio);

    gl_FragColor = vec4(envColor, 1.0);
}