Block neighbor detection improvements #41
Description
At least with the current physics system blocks need to know not only what blocks support them but also what blocks they support. This involves running 10 separate overlap spheres, 1 for each possible position, any time a block needs to update its cache. This can almost certainly be reduced to 2 carefully places spheres that only overlap with the self, above/below, left, right, back, and forward - probably by locating it around (-/+)0.7 with a size of 0.6
This may or mat not even be beneficial, it would take measuring to determine.