/**

* @author mikael emtinger / http://gomo.se/

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

*/

THREE.Sprite = ( function () {

var vertices = new Float32Array( [ - 0.5, - 0.5, 0, 0.5, - 0.5, 0, 0.5, 0.5, 0 ] );

var geometry = new THREE.BufferGeometry();

geometry.addAttribute( 'position', new THREE.BufferAttribute( vertices, 3 ) );

return function ( material ) {

THREE.Object3D.call( this );

this.geometry = geometry;

this.material = ( material !== undefined ) ? material : new THREE.SpriteMaterial();

};

} )();

THREE.Sprite.prototype = Object.create( THREE.Object3D.prototype );

THREE.Sprite.prototype.raycast = ( function () {

var matrixPosition = new THREE.Vector3();

return function ( raycaster, intersects ) {

matrixPosition.setFromMatrixPosition( this.matrixWorld );

var distance = raycaster.ray.distanceToPoint( matrixPosition );

if ( distance > this.scale.x ) {

return;

}

intersects.push( {

distance: distance,

point: this.position,

face: null,

object: this

} );

};

}() );

THREE.Sprite.prototype.updateMatrix = function () {

this.matrix.compose( this.position, this.quaternion, this.scale );

this.matrixWorldNeedsUpdate = true;

};

THREE.Sprite.prototype.clone = function ( object ) {

if ( object === undefined ) object = new THREE.Sprite( this.material );

THREE.Object3D.prototype.clone.call( this, object );

return object;

};

// Backwards compatibility

THREE.Particle = THREE.Sprite;