function Cylinder ( config, radius, height ) {

	    Shape.call( this, config );

	    this.type = SHAPE_CYLINDER;

	    this.radius = radius;
	    this.height = height;
	    this.halfHeight = height * 0.5;

	    this.normalDirection = new Vec3();
	    this.halfDirection = new Vec3();

	}
Cylinder shape
@author saharan
@author lo-th