source: other-projects/playing-in-the-street/summer-2013/trunk/Playing-in-the-Street-WPF/Content/Web/mrdoob-three.js-4862f5f/src/core/Face3.js@ 28897

/**
 * @author mrdoob / http://mrdoob.com/
 * @author alteredq / http://alteredqualia.com/
 */

THREE.Face3 = function ( a, b, c, normal, color, materialIndex ) {

    this.a = a;
    this.b = b;
    this.c = c;

    this.normal = normal instanceof THREE.Vector3 ? normal : new THREE.Vector3();
    this.vertexNormals = normal instanceof Array ? normal : [ ];

    this.color = color instanceof THREE.Color ? color : new THREE.Color();
    this.vertexColors = color instanceof Array ? color : [];

    this.vertexTangents = [];

    this.materialIndex = materialIndex !== undefined ? materialIndex : 0;

    this.centroid = new THREE.Vector3();

};

THREE.Face3.prototype = {

    constructor: THREE.Face3,

    clone: function () {

        var face = new THREE.Face3( this.a, this.b, this.c );

        face.normal.copy( this.normal );
        face.color.copy( this.color );
        face.centroid.copy( this.centroid );

        face.materialIndex = this.materialIndex;

        var i, il;
        for ( i = 0, il = this.vertexNormals.length; i < il; i ++ ) face.vertexNormals[ i ] = this.vertexNormals[ i ].clone();
        for ( i = 0, il = this.vertexColors.length; i < il; i ++ ) face.vertexColors[ i ] = this.vertexColors[ i ].clone();
        for ( i = 0, il = this.vertexTangents.length; i < il; i ++ ) face.vertexTangents[ i ] = this.vertexTangents[ i ].clone();

        return face;

    }

};