public void WorldToView(out double x1, out double y1, out double x2, out double y2)
{
double[] linePoint1 = GetLinePoint1();
double[] linePoint2 = GetLinePoint2();
double[] p1 = GetTransform().MultiplyDoublePoint(VTKUtil.ConvertTo4P(linePoint1));
double[] p2 = GetTransform().MultiplyDoublePoint(VTKUtil.ConvertTo4P(linePoint2));
p1 = line.GetPoint1();
p2 = line.GetPoint2();
VTKUtil.WorldToView(p1, out x1, out y1, _rendererPackage);
VTKUtil.WorldToView(p2, out x2, out y2, _rendererPackage);
}
