public 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;
_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;
// 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 transparent 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);
_standardTransform3D = StandardTransform3D.GetStandardTransform3D(_selectedBoxModel);
SelectedModelRotator.Transform = _standardTransform3D.Transform;
}
private void SelectDuckVisual3D(ModelVisual3D duckModelVisual3D)
{
_selectedVisual3D = duckModelVisual3D;
_standardTransform3D = StandardTransform3D.GetStandardTransform3D(duckModelVisual3D);
TransformEditor.StandardTransform3D = _standardTransform3D;
if (MoveButton.IsChecked ?? false)
{
ShowModelMover();
}
else if (RotateButton.IsChecked ?? false)
{
ShowModelRotator();
}
else if (ScaleButton.IsChecked ?? false)
{
ShowModelScalar();
}
else
{
MoveButton.IsChecked = true; // Show model mover
}
}
private void GenerateRandomDucks(int ducksCount)
{
var rnd = new Random();
double lakeRadius = LakeCircleVisual3D.Radius;
Point3D lakeCenter = LakeCircleVisual3D.CenterPosition;
_duckModels = new List <ModelVisual3D>(ducksCount);
RootDucksVisual3D.Children.Clear();
for (int i = 0; i < ducksCount; i++)
{
bool findNewPosition;
do
{
var position = new Point3D(rnd.NextDouble() * lakeRadius * 2 - lakeRadius,
0,
rnd.NextDouble() * lakeRadius * 2 - lakeRadius);
// If position is outside of 80% of lake radius
double distanceToLakeCenter = (position - lakeCenter).Length;
findNewPosition = distanceToLakeCenter > (lakeRadius * 0.8);
if (!findNewPosition)
{
// Now check if too close to any other duck
foreach (var duckModel in _duckModels)
{
var standardTransform3D = StandardTransform3D.GetStandardTransform3D(duckModel);
var distanceToDuck = (position - standardTransform3D.GetTranslateVector3D().ToPoint3D()).Length;
if (distanceToDuck < DuckSize * 4)
{
findNewPosition = true;
break;
}
}
}
if (!findNewPosition)
{
// The position is ok
double scale = rnd.NextDouble() + 1;
var standardTransform3D = new StandardTransform3D()
{
TranslateX = position.X,
TranslateY = position.Y,
TranslateZ = position.Z,
RotateY = rnd.NextDouble() * 360,
ScaleX = scale,
ScaleY = scale,
ScaleZ = scale
};
var duckVisual3D = new ModelVisual3D()
{
Content = _duckModel3D,
};
StandardTransform3D.SetStandardTransform3D(duckVisual3D, standardTransform3D, updateTransform3D: true);
_duckModels.Add(duckVisual3D);
RootDucksVisual3D.Children.Add(duckVisual3D);
var visualEventSource3D = new VisualEventSource3D(duckVisual3D);
visualEventSource3D.MouseEnter += OnDuckMouseEnter;
visualEventSource3D.MouseLeave += OnDuckMouseLeave;
visualEventSource3D.MouseDown += OnDuckMouseDown;
visualEventSource3D.MouseUp += OnDuckMouseUp;
_eventManager3D.RegisterEventSource3D(visualEventSource3D);
}
} while (findNewPosition);
}
}
