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Worldlines visualizes special relativity, as particles near lightspeed trace paths in a 3D slice of 4D Minkowski spacetime. Scenes illustrate time dilation, the twin paradox, length contraction, and Bell's spaceship paradox.
This is yet another cross platform(written in java) implementation of the classic tetris game. It focuses on funny multiplayer features as well as 2d, 3d and maybe even 4d gameplay modes. Basic 2d single and multiplayer game is already implemented.
Polytope Tetris is n-dimensional Tetris.
Inspired by the HyperTetris program, Polytope Tetris allows you to play tetris in a set number of dimensions. Play tetris in true 3D space, 4D space, or more.