private void LoadDemoSceneMenuItem_Click(object sender, RoutedEventArgs e)
{
ViewModel.AddedSceneElements = new ObservableCollection <Visual3DViewModel>();
ViewPort.Children.Clear();
///Test the HalfEdge Manipulations
/*var triMesh = HalfEdgeMeshGenerator.GenerateHalfEdgeTests();
* triMesh.RemoveTriangle(triMesh.Triangles[0]);
* triMesh.RemoveTriangle(triMesh.Triangles[4]);
* triMesh.RemoveTriangle(triMesh.Triangles[3]);
* triMesh.RemoveTriangle(triMesh.Triangles[1]);
* triMesh.RemoveTriangle(triMesh.Triangles[2]);
* triMesh.RemoveTriangle(triMesh.Triangles[7]);
* ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh.CreateVisual3D(default(Material), default(Material)), "TestVisual"));
* ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh.CreateBoundaryVisual3D(default(Color)), "TestVisual Boundary"));
* ViewPort.DebugInfo = string.Join(" -> ", triMesh.BoundaryVertices.Where((v, i) => i == 0 || i % 2 == 1).Select(v => v.ToString()));*/
///Demo Scene
var triMesh = HalfEdgeMeshGenerator.GenerateCube(HalfEdgeDataStructure.Vector.Zero, 2, CubeSides.All);
var bigCube = triMesh.CreateVisual3D(default(Material), default(Material));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, triMesh.CreateVisual3D(default(Material), default(Material)), "Big Cube"));
triMesh = HalfEdgeMeshGenerator.GenerateCube(new HalfEdgeDataStructure.Vector(1, 1, 2.0005f), .499f, CubeSides.Z | CubeSides.X);
var cubeVisual3D = triMesh.CreateVisual3D(default(Material), default(Material));
var cubeBoundaryVisual3D = triMesh.CreateBoundaryVisual3D(default(Color));
cubeVisual3D.Transform = new RotateTransform3D(new AxisAngleRotation3D(new Vector3D(0, 0, 1), 15));
cubeBoundaryVisual3D.Transform = new RotateTransform3D(new AxisAngleRotation3D(new Vector3D(0, 0, 1), 15));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, cubeVisual3D, "Small Open Cube"));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, cubeBoundaryVisual3D, "Small Open Cube Border"));
triMesh = HalfEdgeMeshGenerator.GenerateCube(new HalfEdgeDataStructure.Vector(0.5f, 0.5f, 2.5f), 1, CubeSides.All & ~CubeSides.PositiveZ, true);
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, triMesh.CreateVisual3D(new DiffuseMaterial(new SolidColorBrush(Colors.OrangeRed)), default(Material)), "Orange Open Cube"));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, triMesh.CreateBoundaryVisual3D(Colors.LightGreen), "Orange Open Cube Border"));
MeshBuilder mb = new MeshBuilder();
mb.AddSphere(new Point3D(3, -1, 0.5), 0.5);
var mg = mb.ToMesh();
triMesh = HalfEdgeMeshGenerator.GenerateFromMeshGeometry3D(mg, true);
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, triMesh.CreateVisual3D(default(Material), default(Material)), "HelixToolkit Sphere"));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(triMesh, triMesh.CreateBoundaryVisual3D(default(Color)), "HelixToolkit Sphere Border"));
var sphere = HalfEdgeMeshGenerator.GenerateSphere(new HalfEdgeDataStructure.Vector(-2, 1, 1), 1, 4,
CubeSides.All & ~CubeSides.PositiveX & ~CubeSides.NegativeY & ~CubeSides.PositiveZ);
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(sphere, sphere.CreateVisual3D(default(Material), default(Material)), "Coarse Sphere Part"));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(sphere, sphere.CreateBoundaryVisual3D(default(Color)), "Coarse Sphere Part Border"));
var material = MaterialHelper.CreateMaterial(new SolidColorBrush(Colors.LightSkyBlue), 1, 128, 255, false);
MaterialHelper.ChangeOpacity(material, 0.5);
var sphere2 = HalfEdgeMeshGenerator.GenerateSphere(new HalfEdgeDataStructure.Vector(-1.975f, 0.975f, 1.025f), 1, 32,
CubeSides.All & ~CubeSides.NegativeX & ~CubeSides.PositiveY & ~CubeSides.NegativeZ);
var numSphere2Triangles = sphere2.Triangles.Count;
var numSphere2Vertices = sphere2.Vertices.Count;
var rand = new Random();
var numRemove = (int)(numSphere2Vertices * 0.2f);
var removalList = new int[numRemove];
for (int i = 0; i < numRemove; i++)
{
removalList[i] = rand.Next(numSphere2Triangles);
}
sphere2.RemoveVertices(removalList);
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(sphere2, sphere2.CreateVisual3D(material, material), "Fine Transparent Sphere Part"));
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(sphere2, sphere2.CreateBoundaryVisual3D(default(Color)), "Fine Transparent Sphere Part Border"));
material = MaterialHelper.CreateMaterial(new SolidColorBrush(Colors.LightGoldenrodYellow), 1, 128, 255, false);
MaterialHelper.ChangeOpacity(material, 0.5);
var sphere3 = HalfEdgeMeshGenerator.GenerateSphere(new HalfEdgeDataStructure.Vector(2, -0.5f, 0.5f), 0.5f, 16);
ViewModel.AddedSceneElements.Add(new Visual3DViewModel(sphere3, sphere3.CreateVisual3D(material, material), "Transparent Sphere"));
AddSceneElements();
///AddSilhoutetteForVisual3D();
}
/// <summary>
/// Handle Mouse Move when the Mouse is in the 3D View.
/// </summary>
/// <param name="sender">The Sender.</param>
/// <param name="e">The MouseEventArgs.</param>
private void ViewPort_MouseMove(object sender, MouseEventArgs e)
{
if (!ViewModel.ShowHoveredElement)
{
return;
}
var maxValue = Math.Tan((ViewPort.Camera as PerspectiveCamera).FieldOfView * 0.5 * ExtensionMethods.DegreeToRadians);
var width = ViewPort.ActualWidth;
var height = ViewPort.ActualHeight;
var aspectRatio = height / width;
var mousePosition = e.GetPosition(ViewPort);
var xValue = mousePosition.X / width * 2 * maxValue - maxValue;
var yValue = (height - mousePosition.Y) / height * maxValue - 0.5;
var ray = Camera.GetRay3D(xValue, yValue);
var material = MaterialHelper.CreateMaterial(new SolidColorBrush(Colors.Orange), 1, 128, 255, false);
MaterialHelper.ChangeOpacity(material, 0.5);
var hitElements = Viewport3DHelper.FindHits(ViewPort.Viewport, mousePosition)
.Where(el => ViewModel.AddedSceneElements.Select(ae => ae.Visual3D).Contains(el.Visual));
if (hitElements.Count() > 0)
{
var hitElement = hitElements.First().Visual;
if (hitElement == ViewPort.Children.Last())
{
return;
}
else if (ViewModel.HoveredElement != null)
{
RemoveHoveredElement();
}
if (hitElement is MeshVisual3D)
{
ViewModel.HoveredElement = new MeshVisual3D()
{
Mesh = (hitElement as MeshVisual3D).Mesh,
FaceMaterial = material,
FaceBackMaterial = material,
Transform = hitElement.Transform,
EdgeDiameter = 0,
VertexRadius = 0
}
}
;
else if (hitElement is MeshGeometryVisual3D)
{
ViewModel.HoveredElement = new MeshGeometryVisual3D()
{
MeshGeometry = (hitElement as MeshGeometryVisual3D).MeshGeometry,
Material = material,
BackMaterial = material,
Transform = hitElement.Transform,
};
}
if (ViewModel.HoveredElement != null)
{
ViewPort.Children.Add(ViewModel.HoveredElement);
}
}
else
{
RemoveHoveredElement();
}
ViewPort.DebugInfo = $"Origin: {ray.Origin.ToString(3)}, Direction: {ray.Direction.ToString(3)}";
}
