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Tag Archives: tetrahedron
Easily draw platonic solids in WPF and C#
This example basically combines and rearranges the techniques used by previous threedimensional examples to make them easier to use. Its methods let you build platonic solids, geodesic spheres, and stellate spheres relatively easily. One real change in this example is … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, example, example program, graphics, icosahedron, mathematics, octahedron, platonic solids, sphere, stellate sphere, tetrahedron, Windows Forms programming, WPF
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Platonic Solids Part 8: Icosahedron and dodecahedron
Understanding the Duals You may recall from the first article in this series (Platonic Solids Part 1: What are the Platonic solids?) that each platonic solid has a dual. You saw in the post Platonic Solids Part 5: Cube and … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, duals, example, example program, graphics, hexahedron, icosahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
1 Comment
Platonic Solids Part 7: The dodecahedron
If you enjoyed calculating the coordinates of the vertices in an icosahedron, you’re in for a treat! Finding the vertices for a dodecahedron is even harder, largely because a dodecahedron has more vertices. An icosahedron has 20 triangular faces and … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, example, example program, graphics, hexahedron, icosaahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
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Platonic Solids Part 6: The icosahedron
Finding the Icosahedron’s Vertices Figure 1 shows an icosahedron with its hidden surfaces removed. Figure 2 shows the same icosahedron with hidden surfaces drawn in dashed lines and its vertices labeled a through l. The icosahedron is centered at the … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, example, example program, graphics, hexahedron, icosahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
16 Comments
Platonic Solids Part 5: Cube and octahedron
You may recall from the first article in this series (Platonic Solids Part 1: What are the Platonic solids?) that each platonic solid has a dual. The cube and octahedron are duals of each other. To make a dual from … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, duals, example, example program, graphics, hexahedron, icosahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
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Platonic Solids Part 4: The octahedron
Finding the Octahedron’s Vertices A platonic octahedron has six triangular faces. Because the edges of the triangles all have the same length, the triangles are equilateral triangles. If an equilateral triangle has edges of length 1, then its height is … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, example, example program, graphics, hexahedron, icosahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
Comments Off on Platonic Solids Part 4: The octahedron
Platonic Solids Part 3: The cube
A platonic cube has six square faces. The cube’s symmetry makes it easy to find the coordinates of its vertices. For a cube with edge lengths of 1, the vertex coordinates are (±0.5, ±0.5, ±0.5) as shown in Figure 1. … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, example, example program, graphics, hexahedron, icosahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
5 Comments
Platonic Solids Part 2: The tetrahedron
A tetrahedron has four faces that are equilateral triangles. In an equilateral triangle, the sides have the same lengths and they meet at 60 degree angles. Figure 1 shows a tetrahedron. Finding the Tetrahedron’s Vertices It is a trigonometric fact … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, example, example program, graphics, hexahedron, icosahedron, mathematics, octahedron, polytopes, regular polytopes, regular solids, tetrahedron, Windows Forms programming, WPF
5 Comments
Platonic Solids Part 1: What are the Platonic solids?
This is the first in a series of posts about the Platonic solids. These posts will show how to find the corners of six Platonic solids: tetrahedron, cube (hexahedron), octahedron, dodecahedron, and icosahedron. Deriving these values requires only algebra and … Continue reading
Posted in algorithms, graphics, mathematics, wpf
Tagged 3D, algorithms, C#, C# programming, cube, dodecahedron, dual, dual solids, example, example program, geometry, graphics, hexahedron, icosahedron, mathematics, octahedron, platonic solids, polygon, polytope, polytopes, regular polygon, regular polytopes, regular solids, solids, tetrahedron, Windows Forms programming, WPF
2 Comments
Perform hit testing in a 3D program that uses WPF, XAML, and C#
Many threedimensional programs need to perform hit testing to determine when the user clicks on something. This example draws two interlocked tetrahedrons inside a cage. When you click on one of the objects, the program displays information about the object … Continue reading
Posted in algorithms, drawing, geometry, graphics, mathematics, wpf, XAML
Tagged 3D, 3D graphics, 3D hit testing, algorithms, C#, C# programming, drawing, example, example program, geometry, graphics, hit test, hit testing, HitTestResult, mathematics, tetrahedron, threedmensional graphics, VisualTreeHelper, Windows Forms programming, wireframe, WPF, XAML
15 Comments