private void button1_Click(object sender, RoutedEventArgs e)
{
for (int cntr = 1; cntr <= 1; cntr++)
{
Color lineColor = UtilityWPF.GetRandomColor(64, 192);
ScreenSpaceLines3D lineModel = new ScreenSpaceLines3D(false);
lineModel.Thickness = 1d;
lineModel.Color = lineColor;
Point3D fromPoint = Math3D.GetRandomVector(15d).ToPoint();
Point3D toPoint = Math3D.GetRandomVector(15d).ToPoint();
//lineModel.AddLine(fromPoint, toPoint);
lineModel.Points.Add(fromPoint);
lineModel.Points.Add(toPoint);
_viewport.Children.Add(lineModel);
lineModel.CalculateGeometry();
_lastLine = lineModel;
}
}