The algorithm

Randomly spaced radial cracks split the surface into wedges.
Each wedge is recursively bisected by straight cuts, angled off the radial direction and placed off-center.
Splitting stops below a target area that grows with distance² from the impact, scaled by a random grain each branch inherits.
Pieces stay convex and tile the original exactly.

Sample size Random seed Fill force colors

Ready. Each click replaces the previous pattern.

Initial force · resulting 3D speed

0 · weak

Strength falls off exponentially with distance from the impact, to about 37% every 180px.
Pieces are pushed outward, with a sideways swirl and a push toward the viewer.
Hits near an edge add a shared push toward the element's center.
Each piece gets ±40% strength and a slightly randomized direction and spin.
Speed and spin are capped; colors use px/s of simulation time.

Inspect a piece

Hover a fragment, or use the slider and arrow keys. Click the sample to inspect pieces.

Current tuning & repeatability

The seed stays fixed until you change it. This page calls fracture() and sampleImpulse() from @abeall/fracture/algorithm with seededRandom(seed); the values below are the defaults.