Hierarchical N-body solver
Fast Multipole Gravity Lab
A live 2D Newtonian gravity system using Cartesian multipole and local Taylor expansions with exact near-field interactions.
M2M → M2L → L2L → P2P
Particles
—
FPS
—
Solve
—
Tree nodes
—
M2L pairs
—
Sample error
—
Tap to add a cluster
Hold to add a massive body
⚙
Controls
Click
to inject a particle cloud ·
Shift-click
to add a massive body ·
Space
pauses