The twister effect is one of the most iconic demoscene effects. It simulates the twisting motion of a cuboid that is made of a soft, pliable material. How does it work The mathematical background behind this visual effect is suprisingly simple. Imagine a cuboid sliced into thin wafers from top to bottom. For each slice, we essentially have a 2D quad, which is mathematically defined by four points: x0, x1, x2, x3. When we view the geometry standing in front of it, each of these slices will app...
