An interactive O(N) gravity engine. A quadtree of cells trades exact pairs for multipole & local Taylor-jet translations, so thousands of bodies interact in milliseconds.
M2M → M2L → L2L → P2P
Live telemetry
Particles—
Frames / sec—
FMM solve—
Tree nodes—
M2L calls—
Sample err—
Control deck–
Scene
1024
FMM solver
3
1.60
32
Physics
0.65
0.018
0.0030
View
Particle trails
Quadtree overlay
Acceleration vectors
Automatic sampled error
Click inject particle cloud · Shift-click add massive body · Space pauses