public static void AddZAxis(Model3DGroup group,
double length = 4, double thickness = 0.1)
{
MeshGeometry3D mesh = new MeshGeometry3D();
Point3D origin = D3.Origin -
D3.XVector(thickness / 2) -
D3.YVector(thickness / 2) -
D3.ZVector(thickness / 2);
mesh.AddBox(origin,
D3.XVector(thickness), D3.YVector(thickness), D3.ZVector(length));
group.Children.Add(mesh.MakeModel(Brushes.Blue));
}
// Make a cube at the origin.
public static void AddOrigin(Model3DGroup group,
double cubeThickness = 0.102)
{
MeshGeometry3D mesh = new MeshGeometry3D();
Point3D origin = D3.Origin -
D3.XVector(cubeThickness / 2) -
D3.YVector(cubeThickness / 2) -
D3.ZVector(cubeThickness / 2);
mesh.AddBox(origin,
D3.XVector(cubeThickness),
D3.YVector(cubeThickness),
D3.ZVector(cubeThickness));
group.Children.Add(mesh.MakeModel(Brushes.Black));
}
// Define the model.
private void DefineModel(Model3DGroup group)
{
// Show the axes.
MeshExtensions.AddAxes(group);
const double scale = 2;
// Make a solid tetrahedron.
MeshGeometry3D mesh1 = new MeshGeometry3D();
mesh1.AddTetrahedron(true);
mesh1.ApplyTransformation(new ScaleTransform3D(scale, scale, scale));
mesh1.ApplyTransformation(D3.Rotate(D3.YVector(), D3.Origin, 180));
mesh1.ApplyTransformation(D3.Rotate(D3.XVector(), D3.Origin, 180));
group.Children.Add(mesh1.MakeModel(Brushes.LightBlue));
// Make a translucent tetrahedron.
MeshGeometry3D mesh2 = new MeshGeometry3D();
mesh2.AddTetrahedron(true);
mesh2.ApplyTransformation(new ScaleTransform3D(scale * 3, scale * 3, scale * 3));
Brush brush = new SolidColorBrush(Color.FromArgb(128, 128, 255, 128));
MaterialGroup group3 = D3.MakeMaterialGroup(
new DiffuseMaterial(brush),
new SpecularMaterial(Brushes.White, 100));
group.Children.Add(mesh2.MakeModel(group3));
// Mark both tetrahedrons' vertices.
MeshGeometry3D mesh3 = new MeshGeometry3D();
foreach (Point3D point in mesh1.Positions)
{
mesh3.AddSphere(point, 0.1, 20, 10, true);
}
foreach (Point3D point in mesh2.Positions)
{
mesh3.AddSphere(point, 0.1, 20, 10, true);
}
group.Children.Add(mesh3.MakeModel(Brushes.Red));
}