void EventManagerDragSample_Loaded(object sender, RoutedEventArgs e)
{
_eventManager = new Ab3d.Utilities.EventManager3D(Viewport3D1);
// When using EventManager3D from Ab3d.PowerToys inside DXEngine,
// it is recommended to set the CustomEventsSourceElement to the DXViewportView or its parent element (for example ViewportBorder).
// If this is not done, then EventManager3D tries to find the DXViewportView and when found uses it as an element that used to subscribe to mouse events.
_eventManager.CustomEventsSourceElement = ViewportBorder;
// Exclude TransparentPlaneVisual3D from hit testing
_eventManager.RegisterExcludedVisual3D(TransparentPlaneVisual3D);
var multiEventSource3D = new Ab3d.Utilities.MultiVisualEventSource3D();
multiEventSource3D.TargetVisuals3D = new Visual3D[] { LowerBoxVisual3D, PassageBoxVisual3D, UpperBoxVisual3D };
multiEventSource3D.IsDragSurface = true;
_eventManager.RegisterEventSource3D(multiEventSource3D);
var eventSource3D = new Ab3d.Utilities.VisualEventSource3D();
eventSource3D.TargetVisual3D = MovableBoxVisual3D;
eventSource3D.Name = "Movable";
eventSource3D.MouseEnter += new Ab3d.Common.EventManager3D.Mouse3DEventHandler(eventSource3D_MouseEnter);
eventSource3D.MouseLeave += new Ab3d.Common.EventManager3D.Mouse3DEventHandler(eventSource3D_MouseLeave);
eventSource3D.MouseClick += new Ab3d.Common.EventManager3D.MouseButton3DEventHandler(movableEventSource3D_MouseClick);
eventSource3D.MouseDrag += new Ab3d.Common.EventManager3D.MouseDrag3DEventHandler(movableEventSource3D_MouseDrag);
_eventManager.RegisterEventSource3D(eventSource3D);
}
// Creates EventManager3D and subscribes the 3d objects to events
private void SubscribeEvents()
{
// Create EventManager3D with MainViewport as constructor parameter
var eventManager = new Ab3d.Utilities.EventManager3D(MainViewport);
// Create EventSource3D for the Landscape
// Each 3D object that needs to participate in the events needs to be registered by EventSource3D
// The Landscape object will not be subscribed to any event, but instead it is only registered as DragSurface
// This means that other objects can be drag over this 3D model.
var eventSource = new Ab3d.Utilities.ModelEventSource3D();
eventSource.TargetModel3D = _landscapeModel;
eventSource.IsDragSurface = true;
// Register the Landscape's EventSource3D
eventManager.RegisterEventSource3D(eventSource);
// Now for each wind generator create its own EventSource3D object
for (int i = 0; i < _windGenerators.Count; i++)
{
// Create new EventSource3D
eventSource = new Ab3d.Utilities.ModelEventSource3D();
// Set the target object to the 3D model
eventSource.TargetModel3D = _windGenerators[i].Model;
// We can assign any custom data (object) to the EventSource3D
// This is very useful because in event handler we can access this custom data
eventSource.CustomData = _windGenerators[i];
// Each wind generator is subscribed to the following events:
eventSource.MouseEnter += OnWindGeneratorMouseEnter;
eventSource.MouseLeave += OnWindGeneratorMouseLeave;
eventSource.BeginMouseDrag += OnWindGeneratorBeginMouseDrag;
eventSource.MouseDrag += OnWindGeneratorMouseDrag;
eventSource.EndMouseDrag += OnWindGeneratorEndMouseDrag;
// Not used events:
//eventSource.MouseClick += new eventSource_MouseClick;
//eventSource.MouseDown += new eventSource_MouseDown;
//eventSource.MouseUp += eventSource_MouseUp;
// Register the EventSource3D to the EventManager3D
eventManager.RegisterEventSource3D(eventSource);
}
}
private void CreateRandomScene()
{
SceneObjectsContainer.Children.Clear();
for (int i = 0; i < 10; i++)
{
var boxModel = new Ab3d.Visuals.BoxVisual3D()
{
CenterPosition = new Point3D(_rnd.NextDouble() * 400 - 200, _rnd.NextDouble() * 40 - 20, _rnd.NextDouble() * 400 - 200),
Size = new Size3D(50, 20, 50),
Material = _normalMaterial
};
SceneObjectsContainer.Children.Add(boxModel);
// Use EventManager from Ab3d.PowerToys to add support for click event on the box model
var visualEventSource3D = new Ab3d.Utilities.VisualEventSource3D(boxModel);
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
var selectedBoxModel = e.HitObject as Ab3d.Visuals.BoxVisual3D;
SelectObject(selectedBoxModel);
};
_eventManager.RegisterEventSource3D(visualEventSource3D);
// Automatically select first box
if (_selectedBoxModel == null)
{
SelectObject(boxModel);
}
}
}
private void CreateRandomScene()
{
SceneObjectsContainer.Children.Clear();
for (int i = 0; i < 10; i++)
{
// Create simple box that user will be able to rotate
// In order to support rotation, we need to create the box at (0,0,0)
// and then after performing rotation, translate the object to its final location.
// If we would create the object at its final rotation (basically applying translation before rotation),
// then the box would not be rotated around its center but around the coordinate axes center.
var boxModel = new Ab3d.UIElements.BoxUIElement3D()
{
CenterPosition = new Point3D(0, 0, 0),
Size = new Size3D(50, 20, 50),
Material = _normalMaterial
};
// Create a StandardTransform3D
// StandardTransform3D is a class that generates a MatrixTransform3D based on the translate, rotate and scale transform.
// Note that because it is not possible to derive from WPF's Transform3D, the StandardTransform3D is a standalone class
// that provides its own MatrixTransform3D object that can be assigned to the 3D model.
// Its static SetStandardTransform3D and GetStandardTransform3D use a custom StandardTransform3DProperty
// to "attach" the StandardTransform3D object to Model3D or Visual3D. But this does not automatically set the
// object's transformation.
var standardTransform3D = new StandardTransform3D()
{
TranslateX = _rnd.NextDouble() * 400 - 200,
TranslateY = _rnd.NextDouble() * 40 - 20,
TranslateZ = _rnd.NextDouble() * 400 - 200,
};
// SetStandardTransform3D method will set the StandardTransform3DProperty to the standardTransform3D
// The updateTransform3D argument will also set the boxModel.Transform to standardTransform3D.Transform
StandardTransform3D.SetStandardTransform3D(boxModel, standardTransform3D, updateTransform3D: true);
SceneObjectsContainer.Children.Add(boxModel);
// Use EventManager from Ab3d.PowerToys to add support for click event on the box model
var visualEventSource3D = new Ab3d.Utilities.VisualEventSource3D(boxModel);
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
var selectedBoxModel = e.HitObject as Ab3d.UIElements.BoxUIElement3D;
SelectObject(selectedBoxModel);
};
_eventManager.RegisterEventSource3D(visualEventSource3D);
// Automatically select first box
if (_selectedBoxModel == null)
{
boxModel.Refresh(); // Force creating the model
SelectObject(boxModel);
}
}
}
private void RegisterMouseEventsOnBoxVisual(BoxVisual3D boxVisual3D, Ab3d.Utilities.EventManager3D eventManager3D)
{
var visualEventSource3D = new VisualEventSource3D(boxVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
ClearMouseOverBoxVisual();
var hitBoxVisual3D = e.HitObject as BoxVisual3D;
if (hitBoxVisual3D != null && !ReferenceEquals(hitBoxVisual3D, _currentlySelectedBoxVisual3D))
{
_savedMouseOverMaterial = hitBoxVisual3D.Material;
hitBoxVisual3D.Material = _mouseOverBoxMaterial;
_currentMouseOverBoxVisual3D = hitBoxVisual3D;
}
Mouse.OverrideCursor = Cursors.Hand;
};
visualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
var hitBoxVisual3D = e.HitObject as BoxVisual3D;
if (!ReferenceEquals(hitBoxVisual3D, _currentlySelectedBoxVisual3D))
{
ClearMouseOverBoxVisual();
}
else
{
_currentMouseOverBoxVisual3D = null;
}
Mouse.OverrideCursor = null;
};
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
ClearSelectedBoxVisual();
var hitBoxVisual3D = e.HitObject as BoxVisual3D;
if (hitBoxVisual3D != null)
{
hitBoxVisual3D.Material = _selectedBoxMaterial;
_currentlySelectedBoxVisual3D = hitBoxVisual3D;
Camera1.RotationCenterPosition = hitBoxVisual3D.CenterPosition;
}
};
eventManager3D.RegisterEventSource3D(visualEventSource3D);
}
public TouchManipulationsSample()
{
InitializeComponent();
// First, create an instace of EventManager3D for MainViewport
_eventManager = new Ab3d.Utilities.EventManager3D(MainViewport);
// Setting CustomEventsSourceElement to a Border that has Background defind (can also be set to Transparent, but should not be null)
// allows EventManager3D to get events even if touch is not over any 3D model.
// For example when moving the model with touch, the model may move away from the fingers
_eventManager.CustomEventsSourceElement = ViewportBorder;
// IMPORTANT:
// We need to manually enable the manipulation events.
// Otherwise we will only get mouse events (also those mouse events that are created from touch events)
//
// NOTE:
// When IsManipulationEnabled, the mouse events will not be created from touch events.
_eventManager.IsManipulationEnabled = true;
// Now create an instance of VisualEventSource3D
// It will be used to define the TeapotVisual3D as source of touch events
var visualEventSource3D = new VisualEventSource3D(TeapotVisual3D);
// Now we can subscribe to manipulation events (we could also subscribe to mouse events)
visualEventSource3D.ManipulationStarted += delegate(object o, Manipulation3DEventArgs <ManipulationStartedEventArgs> e)
{
TeapotVisual3D.DefaultMaterial = new DiffuseMaterial(Brushes.Red);
};
visualEventSource3D.ManipulationCompleted += delegate(object o, Manipulation3DEventArgs <ManipulationCompletedEventArgs> e)
{
TeapotVisual3D.DefaultMaterial = new DiffuseMaterial(Brushes.Silver);
};
visualEventSource3D.ManipulationDelta += VisualEventSource3DOnManipulationDelta;
// Register the teapot as an event source on EventManager3D
_eventManager.RegisterEventSource3D(visualEventSource3D);
// Finally, we need to disable touch events on MouseCameraController
// Otherwise both MouseCameraController and EventManager3D will handle the same events (also zooming and rotating the camera)
MouseCameraController1.IsTouchMoveEnabled = false;
MouseCameraController1.IsTouchRotateEnabled = false;
MouseCameraController1.IsTouchZoomEnabled = false;
}
private void Setup3DObjects()
{
_eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
var wireGridVisual3D = new Ab3d.Visuals.WireGridVisual3D()
{
Size = new System.Windows.Size(1000, 1000),
HeightCellsCount = 10,
WidthCellsCount = 10,
LineThickness = 3
};
MainViewport.Children.Add(wireGridVisual3D);
// Create 7 x 7 boxes with different height
for (int y = -3; y <= 3; y++)
{
for (int x = -3; x <= 3; x++)
{
// Height is based on the distance from the center
double height = (5 - Math.Sqrt(x * x + y * y)) * 60;
// Create the 3D Box visual element
var boxVisual3D = new Ab3d.Visuals.BoxVisual3D()
{
CenterPosition = new Point3D(x * 100, height / 2, y * 100),
Size = new Size3D(80, height, 80),
Material = _normalMaterial
};
MainViewport.Children.Add(boxVisual3D);
var visualEventSource3D = new VisualEventSource3D(boxVisual3D);
visualEventSource3D.MouseEnter += BoxOnMouseEnter;
visualEventSource3D.MouseLeave += BoxOnMouseLeave;
visualEventSource3D.MouseClick += BoxOnMouseClick;
_eventManager3D.RegisterEventSource3D(visualEventSource3D);
}
}
ToggleCameraAnimation(); // Start camer animation
}
private void CreateRandomScene()
{
SceneObjectsContainer.Children.Clear();
for (int i = 0; i < 10; i++)
{
// Create simple box that user will be able to rotate
// In order to support rotation, we need to create the box at (0,0,0)
// and then after performing rotation, translate the object to its final location.
// If we would create the object at its final rotation (basically applying translation before rotation),
// then the box would not be rotated around its center but around the coordinate axes center.
var boxModel = new Ab3d.UIElements.BoxUIElement3D()
{
CenterPosition = new Point3D(0, 0, 0),
Size = new Size3D(50, 20, 50),
Material = _normalMaterial
};
// Create Transform3DGroup that will hold the
var transform3DGroup = new Transform3DGroup();
transform3DGroup.Children.Add(new TranslateTransform3D(_rnd.NextDouble() * 400 - 200, _rnd.NextDouble() * 40 - 20, _rnd.NextDouble() * 400 - 200));
boxModel.Transform = transform3DGroup;
SceneObjectsContainer.Children.Add(boxModel);
// Use EventManager from Ab3d.PowerToys to add support for click event on the box model
var visualEventSource3D = new Ab3d.Utilities.VisualEventSource3D(boxModel);
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
var selectedBoxModel = e.HitObject as Ab3d.UIElements.BoxUIElement3D;
SelectObject(selectedBoxModel);
};
_eventManager.RegisterEventSource3D(visualEventSource3D);
// Automatically select first box
if (_selectedBoxModel == null)
{
boxModel.Refresh(); // Force creating the model
SelectObject(boxModel);
}
}
}
public ModelDecoratorSample()
{
InitializeComponent();
// Use EventManager3D to subscribe to MouseMove and MouseLeave events on RobotArmModel
_eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
var visualEventSource3D = new VisualEventSource3D(RobotArmModel); // RobotArmModel is a source of events
visualEventSource3D.MouseMove += VisualEventSource3DOnMouseMove;
visualEventSource3D.MouseLeave += VisualEventSource3DOnMouseLeave;
_eventManager3D.RegisterEventSource3D(visualEventSource3D);
// !!! IMPORTANT !!!
// We need to exclude ModelDecorator from events
// otherwise when mouse would be over line drawin with ModelDecorator we would get a MouseLeave event
_eventManager3D.RegisterExcludedVisual3D(ModelDecorator);
}
private void SetModel(Model3D model)
{
Point3D center;
double size;
GetModelCenterAndSize(model, out center, out size);
Camera1.TargetPosition = center;
Camera1.Distance = size * 2;
if (!(PreserveModelColorCheckBox.IsChecked ?? false))
{
if (model.IsFrozen)
{
model = model.Clone();
}
Ab3d.Utilities.ModelUtils.ChangeMaterial(model, new DiffuseMaterial(Brushes.White), newBackMaterial: null);
}
_rootModel = model;
OriginalModelVisual.Content = model;
SelectObject(null);
var modelEventSource3D = new ModelEventSource3D(model);
modelEventSource3D.MouseLeave += ModelEventSource3DOnMouseLeave;
modelEventSource3D.MouseMove += ModelEventSource3DOnMouseMove;
_eventManager3D.ResetEventSources3D();
_eventManager3D.RegisterEventSource3D(modelEventSource3D);
// Exclude WireframeVisual from hit testing
_eventManager3D.RegisterExcludedVisual3D(WireframeVisual);
}
private void CreateSceneObjects()
{
for (int x = 0; x < 10; x++)
{
for (int y = 0; y < 4; y++)
{
var boxVisual3D = new Ab3d.Visuals.BoxVisual3D()
{
CenterPosition = new Point3D(-100 + 20 * x, 50 + y * 30, 0),
Size = new Size3D(10, 10, 10),
Material = _standardMaterial
};
if (x == 4 && y == 2)
{
boxVisual3D.Material = _selectedMaterial;
_selectedModel = boxVisual3D;
}
SelectionRootModelVisual3D.Children.Add(boxVisual3D);
}
}
var eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
var multiVisualEventSource3D = new MultiVisualEventSource3D(SelectionRootModelVisual3D.Children);
multiVisualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs args)
{
Mouse.OverrideCursor = Cursors.Hand;
};
multiVisualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs args)
{
Mouse.OverrideCursor = null;
};
multiVisualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
if (_selectedModel != null)
{
_selectedModel.Material = _standardMaterial;
}
var baseModelVisual3D = e.HitObject as Ab3d.Visuals.BaseModelVisual3D;
if (baseModelVisual3D != null)
{
baseModelVisual3D.Material = _selectedMaterial;
_selectedModel = baseModelVisual3D;
}
else
{
_selectedModel = null;
}
string logText = string.Format("Camera1.TurnTo(new Point3D({0:0}, {1:0}, {2:0})", e.FinalPointHit.X, e.FinalPointHit.Y, e.FinalPointHit.Z);
if (AnimateCheckBox.IsChecked ?? false)
{
// Animate the camera turn. Animation duration is 0.5 second and use QuadraticEaseInOutFunction for easing.
Camera1.TurnTo(position: e.FinalPointHit,
animationDurationInMilliseconds: 500,
easingFunction: Ab3d.Animation.EasingFunctions.QuadraticEaseInOutFunction);
logText += ", 500, QuadraticEaseInOutFunction)";
}
else
{
Camera1.TurnTo(e.FinalPointHit); // Turn immediately
logText += ")";
}
LogCommandText(logText);
// You can also call this with direction vector - for example:
//var directionVector = e.FinalPointHit - Camera1.Position;
//Camera1.TurnTo(directionVector);
};
eventManager3D.RegisterEventSource3D(multiVisualEventSource3D);
}
public void ShowData(List <SphereData> originalData)
{
// Now use original data to create our data view objects
// All data will be displayed in a 3D box defined below:
var displayedDataBounds = new Rect3D(-40, -20, -40, 80, 40, 80);
_allPositionsData = new List <SphereDataView>(originalData.Count);
foreach (var originalSphereData in originalData)
{
var sphereDataView = SphereDataView.Create(originalSphereData, displayedDataBounds, originalData.Count, _locationSize, _maxSize);
sphereDataView.IsSelectedChanged += delegate(object sender, EventArgs args)
{
var changedPositionDataView = (SphereDataView)sender;
if (changedPositionDataView.IsSelected)
{
DataListBox.SelectedItems.Add(changedPositionDataView);
}
else
{
DataListBox.SelectedItems.Remove(changedPositionDataView);
}
UpdateSelectedSpheresData();
};
_allPositionsData.Add(sphereDataView);
}
// Setup axis limits and shown values
AxisWireBox.MinYValue = 0;
AxisWireBox.MaxYValue = 10;
AxisWireBox.YAxisValues = new double[] { 0, 2, 4, 6, 8, 10 };
// Bind positions data to ListBox
DataListBox.ItemsSource = _allPositionsData;
// Create curve through all positions
// This is done by first creating all points that define the curve (10 points between each position that define the curve)
List <Point3D> allPositions = new List <Point3D>();
foreach (var positionData in _allPositionsData)
{
allPositions.Add(positionData.Position);
}
BezierCurve bezierCurve = Ab3d.Utilities.BezierCurve.CreateFromCurvePositions(allPositions);
Point3DCollection curvePoints = bezierCurve.CreateBezierCurve(positionsPerSegment: 10); // How many points between each defined position in the curve
// Create 3D Polyline from curvePoints
Model3D curveModel = Ab3d.Models.Line3DFactory.CreatePolyLine3D(curvePoints, thickness: 2, color: Colors.Blue, isClosed: false, startLineCap: LineCap.Flat, endLineCap: LineCap.Flat, parentViewport3D: MainViewport);
CurveModelVisual.Content = curveModel;
// Now create 3D sphere objects for each position
SpheresModelVisual.Children.Clear();
// Each sphere will also need MouseEnter, MouseLeave and MouseClick event handlers
// We use EventManager3D for that
var eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
// Add 3D sphere for each position
foreach (var positionData in _allPositionsData)
{
SpheresModelVisual.Children.Add(positionData.ModelVisual3D); // Sphere Visual3D is created in SphereDataView object
// Add event handlers (sphere Visual3D will be the source of the events)
var visualEventSource3D = new VisualEventSource3D(positionData.ModelVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
if (_isSelecting)
{
return;
}
// Use hand cursor
Mouse.OverrideCursor = Cursors.Hand;
// Find selected position data
var selectedPositionData = _allPositionsData.FirstOrDefault(p => p.ModelVisual3D == e.HitObject);
SelectData(selectedPositionData, e.CurrentMousePosition);
};
visualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
if (_isSelecting)
{
return;
}
Mouse.OverrideCursor = null;
DataToolTipBorder.Visibility = Visibility.Collapsed;
DataToolTipBorder.DataContext = null;
SelectedSphereLinesVisual.Children.Clear();
};
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
// Select / deselect on mouse click
var clickedPositionData = _allPositionsData.FirstOrDefault(p => p.ModelVisual3D == e.HitObject);
if (clickedPositionData != null)
{
positionData.IsSelected = !clickedPositionData.IsSelected;
}
};
// Register the event source
eventManager3D.RegisterEventSource3D(visualEventSource3D);
}
}
private void AddTextBlockVisuals(Point3D startPosition, string text, string fontFamily = null)
{
Point3D position = startPosition;
Vector3D charAdvancementVector = new Vector3D(30, 0, 0);
foreach (var oneChar in text)
{
var textBlockVisual3D = new TextBlockVisual3D()
{
Text = oneChar.ToString(),
Position = position,
PositionType = PositionTypes.Center,
TextDirection = new Vector3D(1, 0, 0),
UpDirection = new Vector3D(0, 1, 0),
Size = new Size(20, 40),
Foreground = Brushes.LightGray,
IsTwoSidedText = true,
IsBackSidedTextFlipped = false
};
if (!string.IsNullOrEmpty(fontFamily))
{
textBlockVisual3D.FontFamily = new FontFamily(fontFamily);
}
MainViewport.Children.Add(textBlockVisual3D);
var visualEventSource3D = new VisualEventSource3D(textBlockVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
var hitTextBlockVisual3D = e.HitObject as TextBlockVisual3D;
if (hitTextBlockVisual3D != null && hitTextBlockVisual3D.Foreground != Brushes.Red)
{
hitTextBlockVisual3D.Foreground = Brushes.Orange;
}
Mouse.OverrideCursor = Cursors.Hand;
};
visualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
var hitTextBlockVisual3D = e.HitObject as TextBlockVisual3D;
if (hitTextBlockVisual3D != null && hitTextBlockVisual3D.Foreground != Brushes.Red)
{
hitTextBlockVisual3D.Foreground = Brushes.LightGray;
}
Mouse.OverrideCursor = null;
};
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
var hitTextBlockVisual3D = e.HitObject as TextBlockVisual3D;
if (hitTextBlockVisual3D != null)
{
if (hitTextBlockVisual3D.Foreground != Brushes.Red)
{
hitTextBlockVisual3D.Foreground = Brushes.Red;
}
else
{
hitTextBlockVisual3D.Foreground = Brushes.Orange;
}
}
};
_eventManager3D.RegisterEventSource3D(visualEventSource3D);
position += charAdvancementVector;
}
}
private void SubscribeEvents()
{
// Create an instance of EventManager3D for out Viewport3D
// Important:
// It is highly recommended not to have more than one EventManager3D object per Viewport3D.
// Having multiple EventManager3D object can greatly reduce the performance because each time the Viewport3D camera is changed,
// each EventManager3D must perform a full 3D hit testing from the current mouse position.
// This operation is very CPU intensive and can affect performance when there are many 3D objects in the scene.
// When multiple EventManager3D object are defined, then the 3D hit testing is performed multiple times.
// Therefore it is recommended to have only one EventManager3D object per Viewport3D.
//
// It is also recommended to remove registered event sources after they are not used any more.
// This can be done with RemoveEventSource3D method.
_eventManager = new Ab3d.Utilities.EventManager3D(MainViewport);
// Create a NamedObjects dictionary and set it to eventManager.
// This way we can use names on EventSource objects to identify Model3D or Visual3D.
// This is very usefull if we read the 3d objects with Reader3ds or ReaderObj and already have the NamedObjects dictionry.
// When names are used in EventSource objects, we get the HitModelName or HitVisualName property set so we can know which object was hit.
var namedObjects = new Dictionary <string, object>();
namedObjects.Add("Landscape", _landscapeModel);
namedObjects.Add("Base", _windGenarator.BaseModel);
namedObjects.Add("Blades", _windGenarator.BladesModel);
namedObjects.Add("Turbine", _windGenarator.TurbineModel);
_eventManager.NamedObjects = namedObjects;
// subscribe the Landscape as the drag surface
var modelEventSource = new Ab3d.Utilities.ModelEventSource3D();
// Instead of using TargetModelName and NamedObjects, we could also specify the model with TargetModel3D
//modelEventSource.TargetModel3D = _landscapeModel;
modelEventSource.TargetModelName = "Landscape";
modelEventSource.IsDragSurface = true;
_eventManager.RegisterEventSource3D(modelEventSource);
// subscribe other objects
var multiModelEventSource = new Ab3d.Utilities.MultiModelEventSource3D();
// Instead of using TargetModelNames and NamedObjects, we could specify the models with model instances
//multiModelEventSource.TargetModels3D = new Model3D[] { _windGenarator.BaseModel,
// _windGenarator.BladesModel,
// _windGenarator.TurbineModel };
// Because we have set the NamedObjects dictionary to _eventManager we can simply specify the models by their names:
multiModelEventSource.TargetModelNames = "Base, Blades, Turbine";
multiModelEventSource.IsDragSurface = false;
// Subscribe to all events
multiModelEventSource.MouseEnter += eventSource_MouseEnter;
multiModelEventSource.MouseLeave += eventSource_MouseLeave;
multiModelEventSource.MouseMove += eventSource_MouseMove;
multiModelEventSource.MouseUp += eventSource_MouseUp;
multiModelEventSource.MouseDown += eventSource_MouseDown;
multiModelEventSource.MouseClick += eventSource_MouseClick;
multiModelEventSource.MouseWheel += multiModelEventSource_MouseWheel;
multiModelEventSource.MouseDoubleClick += eventSource_MouseDoubleClick;
multiModelEventSource.BeginMouseDrag += eventSource_BeginMouseDrag;
multiModelEventSource.MouseDrag += eventSource_MouseDrag;
multiModelEventSource.EndMouseDrag += eventSource_EndMouseDrag;
multiModelEventSource.TouchEnter += eventSource_TouchEnter;
multiModelEventSource.TouchDown += eventSource_TouchDown;
multiModelEventSource.TouchMove += eventSource_TouchMove;
multiModelEventSource.TouchUp += eventSource_TouchUp;
multiModelEventSource.TouchLeave += eventSource_TouchLeave;
// NOTE:
// It is also possible to subscribe to touch manipulations events (pinch scale and rotate)
// But this requires to set IsManipulationEnabled to true and that disables some other events
// See the TouchManipulationsSample for more information
_eventManager.RegisterEventSource3D(multiModelEventSource);
}
private void CreateScene(bool useDXEngineHitTesting)
{
ObjectsPlaceholder.Children.Clear();
if (_dxEventManager3D != null)
{
_dxEventManager3D.ResetEventSources3D();
_dxEventManager3D = null;
}
if (_wpfEventManager != null)
{
_wpfEventManager.ResetEventSources3D();
_wpfEventManager = null;
}
if (_instancedMeshGeometryVisual3D != null)
{
_instancedMeshGeometryVisual3D.Dispose();
}
_stopwatch = new Stopwatch();
_stopwatch.Start();
Mouse.OverrideCursor = Cursors.Wait;
// Create InstancedGeometryVisual3D
_instancedMeshGeometryVisual3D = new InstancedMeshGeometryVisual3D(_instanceMeshGeometry3D);
_instancedMeshGeometryVisual3D.InstancesData = _instancedData;
// Setup hit testing
if (useDXEngineHitTesting)
{
// Use DXEventManager3D from Ab3d.DXEngine - it has optimized hit testing for instanced objects
_dxEventManager3D = new Ab3d.DirectX.Utilities.DXEventManager3D(MainDXViewportView);
var visualEventSource3D = new Ab3d.DirectX.Utilities.VisualEventSource3D(_instancedMeshGeometryVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, DirectX.Common.EventManager3D.Mouse3DEventArgs e)
{
var dxRayInstancedHitTestResult = e.RayHitResult as DXRayInstancedHitTestResult;
if (dxRayInstancedHitTestResult != null)
{
ProcessMouseEnter(dxRayInstancedHitTestResult.HitInstanceIndex);
}
};
visualEventSource3D.MouseMove += delegate(object sender, DirectX.Common.EventManager3D.Mouse3DEventArgs e)
{
var dxRayInstancedHitTestResult = e.RayHitResult as DXRayInstancedHitTestResult;
if (dxRayInstancedHitTestResult != null)
{
ProcessMouseMove(dxRayInstancedHitTestResult.HitInstanceIndex);
}
};
visualEventSource3D.MouseLeave += delegate(object sender, DirectX.Common.EventManager3D.Mouse3DEventArgs e)
{
ProcessMouseLeave();
};
_dxEventManager3D.RegisterEventSource3D(visualEventSource3D);
}
else
{
//
// IMPORTANT:
//
// To make WPF hit testing work (also used by EventManager3D), you need to set the IsWpfHitTestVisible to true.
// This increases initialization time because WPF objects needs to be created for each instance, but this makes the WPF hit testing work.
_instancedMeshGeometryVisual3D.IsWpfHitTestVisible = true;
_wpfEventManager = new Ab3d.Utilities.EventManager3D(MainViewport);
// Because Viewport3D is actually not shown, we need to specify different WPF's object for the source of mouse events - this could be MainDXViewportView or even better a parent Border
_wpfEventManager.CustomEventsSourceElement = MainDXViewportView;
var visualEventSource3D = new Ab3d.Utilities.VisualEventSource3D(_instancedMeshGeometryVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
if (e.RayHitResult == null || e.RayHitResult.ModelHit == null)
{
return; // This should not happen, but it is safer to have this check anyway
}
// Get instance index of the hit object
int hitInstanceIndex = GetHitInstanceIndex(e.RayHitResult);
ProcessMouseEnter(hitInstanceIndex);
};
visualEventSource3D.MouseMove += delegate(object sender, Mouse3DEventArgs e)
{
if (e.RayHitResult == null || e.RayHitResult.ModelHit == null)
{
return; // This should not happen, but it is safer to have this check anyway
}
// Get instance index of the hit object
int hitInstanceIndex = GetHitInstanceIndex(e.RayHitResult);
ProcessMouseMove(hitInstanceIndex);
};
visualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
ProcessMouseLeave();
};
_wpfEventManager.RegisterEventSource3D(visualEventSource3D);
}
ObjectsPlaceholder.Children.Add(_instancedMeshGeometryVisual3D);
Mouse.OverrideCursor = null;
// If we would only change the InstancedData we would need to call Update method (but here this is not needed because we have set the data for the first time)
//_instancedGeometryVisual3D.Update();
}
public void ShowData(List <SphereData> originalData, Rect3D displayedDataBounds, Rect xyDataRange)
{
// Now use original data to create our data view objects
// All data will be displayed in a 3D box defined below:
//var displayedDataBounds = new Rect3D(AxesBox.CenterPosition.X - AxesBox.Size.X * 0.5,
// AxesBox.CenterPosition.Y - AxesBox.Size.Y * 0.5,
// AxesBox.CenterPosition.Z - AxesBox.Size.Z * 0.5,
// AxesBox.Size.X,
// AxesBox.Size.Y,
// AxesBox.Size.Z);
_allSpheresData = new List <SphereDataView>(originalData.Count);
foreach (var originalSphereData in originalData)
{
// Set color of the sphere based on its y position
// We choose the color from the gradient defined in EnsureGradientColorsArray
double relativeY = (originalSphereData.Location.Y - xyDataRange.Y) / xyDataRange.Height;
int colorArrayIndex = (int)(relativeY * (_gradientColorsArray.Length - 1));
Color color = _gradientColorsArray[colorArrayIndex];
var sphereDataView = SphereDataView.Create(originalSphereData, displayedDataBounds, originalData.Count, xyDataRange, color);
sphereDataView.IsSelectedChanged += delegate(object sender, EventArgs args)
{
var changedPositionDataView = (SphereDataView)sender;
if (changedPositionDataView.IsSelected)
{
DataListBox.SelectedItems.Add(changedPositionDataView);
}
else
{
DataListBox.SelectedItems.Remove(changedPositionDataView);
}
UpdateSelectedSpheresData();
};
_allSpheresData.Add(sphereDataView);
}
// Bind positions data to ListBox
DataListBox.ItemsSource = _allSpheresData;
// Create curve through all positions
// This is done by first creating all points that define the curve (10 points between each position that define the curve)
List <Point3D> allPositions = new List <Point3D>();
foreach (var positionData in _allSpheresData)
{
allPositions.Add(positionData.Position);
}
BezierCurve bezierCurve = Ab3d.Utilities.BezierCurve.CreateFromCurvePositions(allPositions);
Point3DCollection curvePoints = bezierCurve.CreateBezierCurve(positionsPerSegment: 10); // How many points between each defined position in the curve
// Create 3D Polyline from curvePoints
Model3D curveModel = Ab3d.Models.Line3DFactory.CreatePolyLine3D(curvePoints, thickness: 2, color: Colors.Blue, isClosed: false, startLineCap: LineCap.Flat, endLineCap: LineCap.Flat, parentViewport3D: MainViewport);
CurveModelVisual.Content = curveModel;
// Now create 3D sphere objects for each position
SpheresModelVisual.Children.Clear();
// Each sphere will also need MouseEnter, MouseLeave and MouseClick event handlers
// We use EventManager3D for that
var eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
// Add 3D sphere for each position
foreach (var positionData in _allSpheresData)
{
SpheresModelVisual.Children.Add(positionData.ModelVisual3D); // Sphere Visual3D is created in SphereDataView object
// Add event handlers (sphere Visual3D will be the source of the events)
var visualEventSource3D = new VisualEventSource3D(positionData.ModelVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
if (_isSelecting)
{
return;
}
// Use hand cursor
Mouse.OverrideCursor = Cursors.Hand;
// Find selected position data
var selectedPositionData = _allSpheresData.FirstOrDefault(p => p.ModelVisual3D == e.HitObject);
SelectData(selectedPositionData, e.CurrentMousePosition);
};
visualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
if (_isSelecting)
{
return;
}
Mouse.OverrideCursor = null;
DataToolTipBorder.Visibility = Visibility.Collapsed;
DataToolTipBorder.DataContext = null;
SelectedSphereLinesVisual.Children.Clear();
};
visualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
// Select / deselect on mouse click
var clickedPositionData = _allSpheresData.FirstOrDefault(p => p.ModelVisual3D == e.HitObject);
if (clickedPositionData != null)
{
positionData.IsSelected = !clickedPositionData.IsSelected;
}
};
// Register the event source
eventManager3D.RegisterEventSource3D(visualEventSource3D);
}
}
private void CreateSceneObjects()
{
for (int y = 0; y < 5; y++)
{
for (int x = 0; x < 6; x++)
{
var boxVisual3D = new Ab3d.Visuals.BoxVisual3D()
{
CenterPosition = new Point3D(40 * x - 100, 6, y * 40 - 80),
Size = new Size3D(10, 10, 10),
Material = _standardMaterial
};
SelectionRootModelVisual3D.Children.Add(boxVisual3D);
}
}
// Use EventManager3D to handle clicking on selected boxes
var eventManager3D = new Ab3d.Utilities.EventManager3D(MainViewport);
var multiVisualEventSource3D = new MultiVisualEventSource3D(SelectionRootModelVisual3D.Children);
multiVisualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
Mouse.OverrideCursor = Cursors.Hand;
var hitBoxVisual3D = e.HitObject as Ab3d.Visuals.BoxVisual3D;
if (hitBoxVisual3D != null)
{
_wireBoxVisual3D.CenterPosition = hitBoxVisual3D.CenterPosition;
_wireBoxVisual3D.Size = hitBoxVisual3D.Size;
MainViewport.Children.Add(_wireBoxVisual3D);
}
};
multiVisualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
Mouse.OverrideCursor = null;
if (_wireBoxVisual3D != null)
{
MainViewport.Children.Remove(_wireBoxVisual3D);
}
};
multiVisualEventSource3D.MouseClick += delegate(object sender, MouseButton3DEventArgs e)
{
if (_selectedBoxVisual3D != null)
{
_selectedBoxVisual3D.Material = _standardMaterial;
}
var hitBoxVisual3D = e.HitObject as Ab3d.Visuals.BoxVisual3D;
if (hitBoxVisual3D != null)
{
hitBoxVisual3D.Material = _selectedMaterial;
_selectedBoxVisual3D = hitBoxVisual3D;
if (_wireBoxVisual3D != null)
{
MainViewport.Children.Remove(_wireBoxVisual3D);
}
MoveCameraTo(hitBoxVisual3D);
}
else
{
_selectedBoxVisual3D = null;
}
};
eventManager3D.RegisterEventSource3D(multiVisualEventSource3D);
// Exclude _wireBoxVisual3D from receiving mouse events
eventManager3D.RegisterExcludedVisual3D(_wireBoxVisual3D);
}
private void SetupMouseEventHandlers(Visual3D targetModelVisual3D)
{
var visualEventSource3D = new VisualEventSource3D(targetModelVisual3D);
visualEventSource3D.MouseEnter += delegate(object sender, Mouse3DEventArgs e)
{
Mouse.OverrideCursor = Cursors.Cross;
};
visualEventSource3D.MouseLeave += delegate(object sender, Mouse3DEventArgs e)
{
Mouse.OverrideCursor = null;
};
visualEventSource3D.MouseMove += delegate(object sender, Mouse3DEventArgs e)
{
if (e.MouseData.LeftButton != MouseButtonState.Pressed)
{
return;
}
// Calculte the position inside texture where the mouse is
Point hitPosition;
var success = GetRelativeHitTexturePosition(e.RayHitResult, out hitPosition);
if (!success)
{
return; // Cannot get the position
}
// The position was now relative (1 was bottom right)
// Now adjust the position for the size of target Canvas
double xPos = hitPosition.X * DrawingCanvas.Width;
double yPos = hitPosition.Y * DrawingCanvas.Height;
double strokeThickness = _settings.CurrentStrokeThickness;
double halfStrokeThickness = strokeThickness / 2;
// Prevent drawing over the "edge" of Canvas
// This would increase the size of Canvas and produce white areas on the model
// Set xPos to be between halfStrokeThickness and DrawingCanvas.Width - halfStrokeThickness
xPos = Math.Max(halfStrokeThickness, Math.Min(xPos, DrawingCanvas.Width - halfStrokeThickness));
yPos = Math.Max(halfStrokeThickness, Math.Min(yPos, DrawingCanvas.Height - halfStrokeThickness));
// Check if the change of position is significant
if (Math.Abs(_lastXPos - xPos) < 1 && Math.Abs(_lastYPos - yPos) < 1)
{
return;
}
_lastXPos = xPos;
_lastYPos = yPos;
var ellipse = new Ellipse()
{
Width = strokeThickness,
Height = strokeThickness,
Fill = _settings.CurrentStrokeBrush
};
Canvas.SetLeft(ellipse, xPos - halfStrokeThickness);
Canvas.SetTop(ellipse, yPos - halfStrokeThickness);
DrawingCanvas.Children.Add(ellipse);
};
_eventManager3D.ResetEventSources3D(); // Clear all previously registered event sources
_eventManager3D.RegisterEventSource3D(visualEventSource3D);
}
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);
}
}
