4 ms·
Another reason that tetras are handy (for anyone who has looked at FEA) is that you can easily interpolate across them. Maybe not useful now, but if they ever w
by angersock 12y ago
Another reason that tetras are handy (for anyone who has looked at FEA) is that you can easily interpolate across them. Maybe not useful now, but if they ever want to add heat transfer or charge or something...
- TheLoneWolfling 12y agoAmbient lighting is another case. Surface versus volume, and hence triangles versus squares versus tetra versus cubes, but same difference. Squares have the problem that there are ambiguous cases at saddle points, which you don't get with triangles. If you have this: 1 0 0 1 It could be this: 1 . 0 . . . . 0 . 1 Or this: 1 . 0 . . . . 0 . 1 With triangles there is no analogous issue.
- angersock 12y agoQuite right. Great example of this is Wings3D--take a quad, add a crease, and switch to OpenGL rendering and watch the weirdness occur. Quads are just bad.
- pacaro 12y agoAlso you can do the equivalent of a Delaunay triangulation in 3D to consistently convert point clouds into tetrahedra
- kbenson 12y agoThis would be really cool combined with laser scanning hardware[1] to generate point clouds of real-life environments. Deformable representations of the real-world. 1: https://news.ycombinator.com/item?id=9419534 https://news.ycombinator.com/item?id=9419534