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

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

THREE.BoxHelper = function ( object ) {

    //   5____4
    // 1/___0/|
    // | 6__|_7
    // 2/___3/

    var vertices = [
        new THREE.Vector3(   1,   1,   1 ),
        new THREE.Vector3( - 1,   1,   1 ),
        new THREE.Vector3( - 1, - 1,   1 ),
        new THREE.Vector3(   1, - 1,   1 ),

        new THREE.Vector3(   1,   1, - 1 ),
        new THREE.Vector3( - 1,   1, - 1 ),
        new THREE.Vector3( - 1, - 1, - 1 ),
        new THREE.Vector3(   1, - 1, - 1 )
    ];

    this.vertices = vertices;

    // TODO: Wouldn't be nice if Line had .segments?

    var geometry = new THREE.Geometry();
    geometry.vertices.push(
        vertices[ 0 ], vertices[ 1 ],
        vertices[ 1 ], vertices[ 2 ],
        vertices[ 2 ], vertices[ 3 ],
        vertices[ 3 ], vertices[ 0 ],

        vertices[ 4 ], vertices[ 5 ],
        vertices[ 5 ], vertices[ 6 ],
        vertices[ 6 ], vertices[ 7 ],
        vertices[ 7 ], vertices[ 4 ],

        vertices[ 0 ], vertices[ 4 ],
        vertices[ 1 ], vertices[ 5 ],
        vertices[ 2 ], vertices[ 6 ],
        vertices[ 3 ], vertices[ 7 ]
    );

    THREE.Line.call( this, geometry, new THREE.LineBasicMaterial( { color: 0xffff00 } ), THREE.LinePieces );

    if ( object !== undefined ) {

        this.update( object );

    }

};

THREE.BoxHelper.prototype = Object.create( THREE.Line.prototype );

THREE.BoxHelper.prototype.update = function ( object ) {

    var geometry = object.geometry;

    if ( geometry.boundingBox === null ) {

        geometry.computeBoundingBox();

    }

    var min = geometry.boundingBox.min;
    var max = geometry.boundingBox.max;
    var vertices = this.vertices;

    vertices[ 0 ].set( max.x, max.y, max.z );
    vertices[ 1 ].set( min.x, max.y, max.z );
    vertices[ 2 ].set( min.x, min.y, max.z );
    vertices[ 3 ].set( max.x, min.y, max.z );
    vertices[ 4 ].set( max.x, max.y, min.z );
    vertices[ 5 ].set( min.x, max.y, min.z );
    vertices[ 6 ].set( min.x, min.y, min.z );
    vertices[ 7 ].set( max.x, min.y, min.z );

    this.geometry.computeBoundingSphere();
    this.geometry.verticesNeedUpdate = true;

    this.matrixAutoUpdate = false;
    this.matrixWorld = object.matrixWorld;

};