private void ShowModelScalar()
{
HideModelMover();
HideModelRotator();
if (_selectedVisual3D == null || _standardTransform3D == null)
{
return;
}
EnsureModelScalar();
_modelScalar.Position = _standardTransform3D.GetTranslateVector3D().ToPoint3D();
// If the 3D scene would not be shown yet, we would need to refresh the camera
//Camera1.Refresh();
// We need to set the size of the model mover's axes to an appropriate size so that it will look big enough
// regardless of how far away the selected model is.
// This can be done with calculating how big a 80 x 80 rectangle (in screen coordinates) would be in 3D space at the specified distance:
double lookDirectionDistance = (_modelScalar.Position - Camera1.GetCameraPosition()).Length;
var worldSize = Ab3d.Utilities.CameraUtils.GetPerspectiveWorldSize(new Size(80, 80), lookDirectionDistance, Camera1.FieldOfView, new Size(MainViewport.ActualWidth, MainViewport.ActualHeight));
_modelScalar.AxisLength = (worldSize.Width + worldSize.Height) / 2; // average the width and height
_modelScalar.InnerBoxWidth = _modelScalar.AxisLength * 0.06;
_modelScalar.OuterBoxWidth = _modelScalar.InnerBoxWidth * 3;
_modelScalar.CenterBoxWidth = _modelScalar.InnerBoxWidth * 5;
if (!OverlayViewport.Children.Contains(_modelScalar))
{
OverlayViewport.Children.Add(_modelScalar);
}
}
