function SpriteMaterial( parameters ) {

        Material.call( this );

        this.type = 'SpriteMaterial';

        this.color = new Color( 0xffffff );
        this.map = null;

        this.rotation = 0;

        this.fog = false;
        this.lights = false;

        this.setValues( parameters );

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

parameters = {
 color: <hex>,
 opacity: <float>,
 map: new THREE.Texture( <Image> ),

 uvOffset: new THREE.Vector2(),
 uvScale: new THREE.Vector2()
}