public Model3D CreateModel(Point3DCollection points, Color colorStart, Color colorEnd)
{
var centroid = this.f.GetCentroid();
// center = Sum(p[i]) / 4
var center = points.Aggregate(new Vector3D(), (a, c) => a + (Vector3D)c) / (double)points.Count;
//var normals = new Vector3DCollection();
var indices = new Int32Collection();
MakeFace(0, 1, 2, center, indices, points);
var geometry = new MeshGeometry3D {
Positions = points, TriangleIndices = indices
};
var material = new MaterialGroup
{
Children = new MaterialCollection
{
new DiffuseMaterial(new LinearGradientBrush(colorStart, colorEnd, 0.0)
{
Opacity = 1.00
})
}
};
return(new GeometryModel3D {
Geometry = geometry, Material = material, BackMaterial = material
});
}
/// <summary>
/// Creates a model of the tetrahedron. Transparency is applied to the color.
/// </summary>
/// <param name="color"></param>
/// <param name="radius"></param>
/// <returns>A model representing the tetrahedron</returns>
public Model3D CreateModel(Color color, double radius)
{
this.translation = new TranslateTransform3D();
var points = new Point3DCollection(Enumerable.Range(0, 4).Select(i => GetPosition(i)));
// center = Sum(p[i]) / 4
var center = points.Aggregate(new Vector3D(), (a, c) => a + (Vector3D)c) / (double)points.Count;
var normals = new Vector3DCollection();
var indices = new Int32Collection();
MakeFace(0, 1, 2, center, indices);
MakeFace(0, 1, 3, center, indices);
MakeFace(0, 2, 3, center, indices);
MakeFace(1, 2, 3, center, indices);
var geometry = new MeshGeometry3D {
Positions = points, TriangleIndices = indices
};
var material = new MaterialGroup
{
Children = new MaterialCollection
{
new DiffuseMaterial(new SolidColorBrush(color)
{
Opacity = 1.00
}),
// give it some shine
new SpecularMaterial(Brushes.LightYellow, 2.0)
}
};
pulseX = CreatePulseAnimation(2 * center.X);
pulseY = CreatePulseAnimation(2 * center.Y);
pulseZ = CreatePulseAnimation(2 * center.Z);
expandX = CreateExpandAnimation(2 * center.X);
expandY = CreateExpandAnimation(2 * center.Y);
expandZ = CreateExpandAnimation(2 * center.Z);
movePositive = CreateExpandAnimation(radius / 2);
moveNegative = CreateExpandAnimation(-radius / 2);
collapse = new DoubleAnimation {
To = 0, Duration = TimeSpan.FromSeconds(1), EasingFunction = collapseEasing
};
return(new GeometryModel3D {
Geometry = geometry, Material = material, BackMaterial = material, Transform = translation
});
}
/// <summary>
/// Creates a model of the tetrahedron. Transparency is applied to the color.
/// </summary>
/// <param name="color"></param>
/// <param name="radius"></param>
/// <returns>A model representing the tetrahedron</returns>
public int[][] MakeFaces()
{
var points = new Point3DCollection(Enumerable.Range(0, 4).Select(i => GetPosition(i)));
var center = points.Aggregate(new Vector3D(), (a, c) => a + (Vector3D)c) / (double)points.Count;
var indices = new int[4][];
indices[0] = MakeFace(0, 1, 2, center);
indices[1] = MakeFace(0, 1, 3, center);
indices[2] = MakeFace(0, 2, 3, center);
indices[3] = MakeFace(1, 2, 3, center);
return(indices);
}
