copy method
Copies another name
object to this instance.
Implementation
@override
CubicBezierCurve3 copy(Curve source){
assert(source is CubicBezierCurve3);
super.copy(source);
v0.setFrom( source.v0 );
v1.setFrom( source.v1 );
v2.setFrom( source.v2 );
v3.setFrom( (source as CubicBezierCurve3).v3 );
return this;
}