@author mr.doob / http://mrdoob.com/

Ported to Dart from JS by: @author rob silverton / http://www.unwrong.com/

class RenderableVertex {
 Vector3 positionWorld;
 Vector4 positionScreen;

 bool visible = true;

 RenderableVertex()
     : positionWorld = new Vector3.zero(),
       positionScreen = new Vector4(0.0, 0.0, 0.0, 1.0);

 copy( RenderableVertex vertex ) {
   positionWorld.setFrom( vertex.positionWorld );
   positionScreen.setFrom( vertex.positionScreen );
 }
 
 clone() => new RenderableVertex()..copy(this);
}