Press [Z], [X] and [C] to switch between the grid and brute-force methods. In (alt)grid mode, you can hold down the mouse to generate gravity and direct points. Press [G] to switch between default and simple graphics. The simple graphics mode offers a small performance boost. Move the mouse to the top of the screen to see parameters you can adjust.
Gravity simulation based on a flat grid. Performance is significantly better than Barnes-Hut algorithm on Scratch, with 500 particles simulating at full speed, but accuracy is reduced. - `grav.in` is updated to include the combined mass of each particle in each cell. - `grav.x`, `grav.y` are updated to include the combined gravitational influence of other cells. - Then, particles are accelerated & moved based on the gravitational influence in their cell. `AltGrd` mode is similar to `Grid` mode, but the grid is offset on alternating frames to improve accuracy at minimal performance cost. The visualization for this mode is a work-in-progress. (Also, for some reason, brute-force mode with friction looks almost... alive. But you'll need to try it in TurboWarp)
