source: other-projects/playing-in-the-street/summer-2013/trunk/Playing-in-the-Street-WPF/Content/Web/mrdoob-three.js-4862f5f/src/renderers/shaders/UniformsUtils.js@ 28897

/**
 * Uniform Utilities
 */

THREE.UniformsUtils = {

    merge: function ( uniforms ) {

        var u, p, tmp, merged = {};

        for ( u = 0; u < uniforms.length; u ++ ) {

            tmp = this.clone( uniforms[ u ] );

            for ( p in tmp ) {

                merged[ p ] = tmp[ p ];

            }

        }

        return merged;

    },

    clone: function ( uniforms_src ) {

        var u, p, parameter, parameter_src, uniforms_dst = {};

        for ( u in uniforms_src ) {

            uniforms_dst[ u ] = {};

            for ( p in uniforms_src[ u ] ) {

                parameter_src = uniforms_src[ u ][ p ];

                if ( parameter_src instanceof THREE.Color ||
                     parameter_src instanceof THREE.Vector2 ||
                     parameter_src instanceof THREE.Vector3 ||
                     parameter_src instanceof THREE.Vector4 ||
                     parameter_src instanceof THREE.Matrix4 ||
                     parameter_src instanceof THREE.Texture ) {

                    uniforms_dst[ u ][ p ] = parameter_src.clone();

                } else if ( parameter_src instanceof Array ) {

                    uniforms_dst[ u ][ p ] = parameter_src.slice();

                } else {

                    uniforms_dst[ u ][ p ] = parameter_src;

                }

            }

        }

        return uniforms_dst;

    }

};