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Examples

You can use the "page up" and "page down" keys to flip through the scene files in the current directory in alphabetical order.

basic-train

The big 3D train layout I used for the picture on the front page. Try turning off all textures except texture 0.

basic-train2

The elevated train layout I used during development.

basic-geom

A basic 3D geometry layout.

basic-maze

Once I thought of this, I couldn't resist making one as a proof of concept.

More Examples

The examples are organized into folders; folder names are in parentheses.

Geometry Examples (geom, geomx)
More Geometry Examples (geom2)
Train Examples (train)
Elevated Train Examples (train2)
Scenery Examples (scenery)
Toys and Puzzles (puzzle)
Contributed Examples (contrib)

single-X (single)

This is reference material, but it can be fun to look at. For every shape in the library files there's a corresponding "single-X" file that displays just that one shape. Most of them are self-explanatory.

rtetra - right-angled tetrahedron with vertices at the origin and the unit vector endpoints
rpenta - the analogous right-angled pentachoron
ceil3 - shape that fits onto "rtetra"
ceil4 - prism of "ceil3"
extra4 - shape that fits onto "rpenta"
wedge4 - prism of "rtetra"
the24cell - regular polychoron with 24 octahedral faces. It's pretty and multicolored!

Fun geometry facts: If you think of the vertices and edges of a cube as forming a graph, that graph can be colored with just two colors. If you take the vertices of one color and make a shape out of them, you get an inscribed tetrahedron ("itetra"). The same construction in 4D gives you an inscribed hexadecachoron ("ihexadeca"). There were two colors, so there are two inscribed tetrahedra and two inscribed hexadecachora. However, if you make a shape out of the face centers of a tesseract, you get … another hexadecachoron! And if you make that hexadecachoron exactly twice as large, then it's the same size as the other two, because 22 = 12+12+12+12. Each hexadecachoron has eight vertices. If you make a shape out of all three sets of eight at once, you get … a 24-cell! It can't be colored with two colors, but because it's made of vertices from three hexadecachora and is self-dual, it can be colored with three colors in a nice symmetrical way.

scene

This is just an old scratch file of mine.