public void DoExecuteWork(SharedObjects shared, Vector start, Vector vec, RgbaColor rgba, string str, double scale, bool show, double width)
{
var vRend = new VectorRenderer( shared.UpdateHandler, shared )
{
Vector = vec,
Start = start,
Color = rgba,
Scale = scale,
Width = width
};
vRend.SetLabel( str );
vRend.SetShow( show );
ReturnValue = vRend;
}