Set 2nd tetra to -1 for two opposite tetrahedrons Alter x, y, or z point maximums for variant shapes Echoes makes many smaller duplicate versions Touch screen (hi, lo, left, right) to alter rotation
4-face = Tetrahedron. Here two tetrahedra intersect to make a stellar octahedron. xyz coordinates are all -1 or 1, but you can change: xyz set to 0s makes two non-overlapping tetrahedra, for example. Aimed for minimal code with maximum variety. Touch center of screen to stop, edges to rotate faster. #geometry #pen #tetrahedron
