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

THREE.BoxLineGeometry = function ( width, height, depth, widthSegments, heightSegments, depthSegments ) {

	THREE.BufferGeometry.call( this );

	width = width || 1;
	height = height || 1;
	depth = depth || 1;

	widthSegments = Math.floor( widthSegments ) || 1;
	heightSegments = Math.floor( heightSegments ) || 1;
	depthSegments = Math.floor( depthSegments ) || 1;

	var widthHalf = width / 2;
	var heightHalf = height / 2;
	var depthHalf = depth / 2;

	var segmentWidth = width / widthSegments;
	var segmentHeight = height / heightSegments;
	var segmentDepth = depth / depthSegments;

	var vertices = [];

	var x = - widthHalf, y = - heightHalf, z = - depthHalf;

	for ( var i = 0; i <= widthSegments; i ++ ) {

		vertices.push( x, - heightHalf, - depthHalf, x,   heightHalf, - depthHalf );
		vertices.push( x,   heightHalf, - depthHalf, x,   heightHalf,   depthHalf );
		vertices.push( x,   heightHalf,   depthHalf, x, - heightHalf,   depthHalf );
		vertices.push( x, - heightHalf,   depthHalf, x, - heightHalf, - depthHalf );

		x += segmentWidth;

	}

	for ( var i = 0; i <= heightSegments; i ++ ) {

		vertices.push( - widthHalf, y, - depthHalf,   widthHalf, y, - depthHalf );
		vertices.push(   widthHalf, y, - depthHalf,   widthHalf, y,   depthHalf );
		vertices.push(   widthHalf, y,   depthHalf, - widthHalf, y,   depthHalf );
		vertices.push( - widthHalf, y,   depthHalf, - widthHalf, y, - depthHalf );

		y += segmentHeight;

	}

	for ( var i = 0; i <= depthSegments; i ++ ) {

		vertices.push( - widthHalf, - heightHalf, z, - widthHalf,   heightHalf, z );
		vertices.push( - widthHalf,   heightHalf, z,   widthHalf,   heightHalf, z );
		vertices.push(   widthHalf,   heightHalf, z,   widthHalf, - heightHalf, z );
		vertices.push(   widthHalf, - heightHalf, z, - widthHalf, - heightHalf, z );

		z += segmentDepth;

	}

	this.addAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );

}

THREE.BoxLineGeometry.prototype = Object.create( THREE.BufferGeometry.prototype );
THREE.BoxLineGeometry.prototype.constructor = THREE.BoxLineGeometry;