Prayer Flags (Verlet Cloth)

Nepali prayer flags on a sagging rope. Wind makes them flutter; drag, cut or pull hard to tear them.

sketchCanvas 2D

Position-based Verlet integration with distance constraints relaxed N times per frame; constraints over the tear distance are removed.

Fixed 60Hz substep with accumulator; 30Hz on low tier.

“Reset” and “Wind gust” buttons provide non-pointer interaction.

Playgroundcustom

Gravity900

Constraint iterations4

Tear distance60

Wind140

Export

{
  "gravity": 900,
  "iterations": 4,
  "tear": 60,
  "wind": 140
}