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)
{
// verify the octahedron calculations.
MeshExtensions.VerifyOctahedron();
// Show the axes.
MeshExtensions.AddAxes(group);
const double scale = 3;
// Make a solid insphere.
MeshGeometry3D mesh1 = new MeshGeometry3D();
mesh1.AddSphere(D3.Origin, G3.OctahedronInradius(), 60, 30, true);
mesh1.ApplyTransformation(new ScaleTransform3D(scale, scale, scale));
group.Children.Add(mesh1.MakeModel(Brushes.Red));
// Make a translucent octahedron.
MeshGeometry3D mesh2 = new MeshGeometry3D();
mesh2.AddOctahedron();
mesh2.ApplyTransformation(new ScaleTransform3D(scale, scale, scale));
Brush brush = new SolidColorBrush(Color.FromArgb(128, 128, 255, 128));
MaterialGroup group2 = D3.MakeMaterialGroup(
new DiffuseMaterial(brush),
new SpecularMaterial(Brushes.White, 100));
group.Children.Add(mesh2.MakeModel(group2));
// Make a translucent circumsphere.
MeshGeometry3D mesh3 = new MeshGeometry3D();
mesh3.AddSphere(D3.Origin, G3.OctahedronCircumradius(), 60, 30, true);
mesh3.ApplyTransformation(new ScaleTransform3D(scale, scale, scale));
MaterialGroup group3 = D3.MakeMaterialGroup(
new DiffuseMaterial(brush),
new SpecularMaterial(Brushes.White, 100));
group.Children.Add(mesh3.MakeModel(group3));
}