danini-the-panini/mittsu-opengl

#ifdef USE_SHADOWMAP

    uniform sampler2D shadowMap[ MAX_SHADOWS ];
    uniform vec2 shadowMapSize[ MAX_SHADOWS ];

    uniform float shadowDarkness[ MAX_SHADOWS ];
    uniform float shadowBias[ MAX_SHADOWS ];

    in vec4 vShadowCoord[ MAX_SHADOWS ];

    float unpackDepth( const in vec4 rgba_depth ) {

        const vec4 bit_shift = vec4( 1.0 / ( 256.0 * 256.0 * 256.0 ), 1.0 / ( 256.0 * 256.0 ), 1.0 / 256.0, 1.0 );
        float depth = dot( rgba_depth, bit_shift );
        return depth;

    }

#endif