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();
}
