3 ms·
Except you have to have been simulating outside the light cone so that, once the light cone expands to include that space you know its state. So in reality, if
by haldean 13y ago
Except you have to have been simulating outside the light cone so that, once the light cone expands to include that space you know its state. So in reality, if you're interested in location V at time t, you have to simulate everything that will end up within the sphere centered at V at time t, not just whatever is in the sphere instantaneously.
- delluminatus 13y agoYes, which is why the light cone is actually described as a 4D object that exists in spacetime, not a 3D sphere. Some back of the envelope calculation indicates that the spacetime "volume" of the light cone of an object is 1/8th of the spacetime volume of the universe up to that point. So using the light cone would net you an 8x speedup over a brute-force Universe render. Nothing to write home about if you have infinite computing power.