private void SelectObject(Ab3d.UIElements.BoxUIElement3D selectedBox)
{
// Deselect currently selected model
if (_selectedBoxModel != null)
{
// Set material back to normal
_selectedBoxModel.Material = _normalMaterial;
_selectedBoxModel.BackMaterial = null;
// Allow hit testing again - so user can select that object again
_selectedBoxModel.IsHitTestVisible = true;
// IMPORTANT !!!
// When ModelMoverVisual3D is used with EventManager3D
// we also need to remove the _selectedBoxModel from hit-testing.
// This way user will be able to click on the movable arrows that lie inside the _selectedBoxModel (otherwise the _selectedBoxModel will receive the clicks)
_eventManager.RemoveExcludedVisual3D(_selectedBoxModel);
_selectedBoxModel = null;
}
_selectedBoxModel = selectedBox;
if (_selectedBoxModel == null)
{
return;
}
// Prevent hit-testing in selected model
// This will allow clicking on the parts of move arrows that are inside the selected model
// Note that IsHitTestVisible is available only on models derived from UIElement3D (if you need that on GeometryModel3D or ModelVisual3D, then use ModelUIElement3D as parent of your model)
_selectedBoxModel.IsHitTestVisible = false;
// IMPORTANT !!!
// When ModelMoverVisual3D is used with EventManager3D
// we also need to remove the _selectedBoxModel from hit-testing.
// This way user will be able to click on the movable arrows that lie inside the _selectedBoxModel (otherwise the _selectedBoxModel will receive the clicks)
_eventManager.RegisterExcludedVisual3D(_selectedBoxModel);
// Change material to semi-transparent Silver
_selectedBoxModel.Material = _selectedMaterial;
_selectedBoxModel.BackMaterial = _selectedMaterial; // We also set BackMaterial so the inner side of boxes will be visible
// To render the transpant object correctly, we need to sort the objects so that the transparent objects are rendered after other objects
// We can use the TransparencySorter from Ab3d.PowerToys
// Note that it is also possible to use TransparencySorter with many advanced features - see the Model3DTransparencySortingSample for more info
TransparencySorter.SimpleSort(SceneObjectsContainer.Children);
// In our simple case (we have only one transparent object), we could also manually "sort" the objects with moving the transparent object to the back of the Children collection:
//SceneObjectsContainer.Children.Remove(_selectedBoxVisual3D);
//SceneObjectsContainer.Children.Add(_selectedBoxVisual3D);
if (_modelMover == null)
{
SetupModelMover();
}
#if !USE_GENERIC_MODEL3D
_modelMover.Position = _selectedBoxModel.CenterPosition;
#else
_startMovePosition = GetSelectedModelCenter();
_modelMover.Position = _startMovePosition;
#endif
// Tell ModelDecoratorVisual3D which Model3D to show
SelectedModelDecorator.TargetModel3D = _selectedBoxModel.Model;
// NOTE:
// When the 3D models are organized into hierarchy of models with using different ModelVisual3D or Model3DGroup objects,
// you also need to so specify the SelectedModelDecorator.RootModelVisual3D in order to get the correct position of the TargetModel3D
}
