Bounce
by Perplex
Premium 3D Physics for the Web
Fast, Determinstic Physics for Typescript and Javascript projects
Fully-featured contraints-based physical simulation
Tiny: 60kb gzipped, with no external dependencies
Highly configurable and ready for gaming, animation and robotics
Powerful spatial queries: fast raycasting, sweep and intersection tests
Works with any 3D renderer, and even without rendering, e.g. on NodeJs
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API
Bounce has a clean and intuitive API. Here's a simple example:
// create a bounce world
const world = new World({
  gravity: { x: 0, y: -9.81, z: 0 },
});

// add a box-shaped body for the ground
const groundShape = world.createBox({
  width: 10,
  height: 2,
  depth: 10,
});

const ground = world.createStaticBody({
  shape: groundShape,

  // the center of the ground box
  position: { x: 0, y: -1, z: 0 },

  // both euler and quaternion are accepted
  orientation: { x: 0, y: 0, z: 0 },

  friction: 0.4,
  restitution: 0.3,
});

// add a sphere-shaped body
const ballShape = world.createSphere({ radius: 0.5 });

const ball = world.createDynamicBody({
  shape: ballShape,
  position: { x: 0, y: 10, z: 0 },
  orientation: { x: 0, y: 0, z: 0 },
  friction: 0.4,
  restitution: 0.3,
  mass: 0.5,
});

// simulate 10 seconds of time passing
const timeStepSizeSeconds = 1 / 60;
for (let i = 0; i < 600; i++) {
  world.takeOneStep(timeStepSizeSeconds);
}
More API Examples »
Licensing Options
Choose the option that best suits your needs.
One-time Purchase
For commercial use, including games, ad campaigns and apps
$849USD one time fee
special introductory price
  • Access to all features
  • 60 day money-back guarantee
  • 3 months of priority support
  • 2 years of support and updates
  • License is valid for one project (e.g. one game or one ad campaign)
Royalty-based License
For commercial games
$49USD one time fee + 3% royalties
 
  • Access to all features
  • 60 day money-back guarantee
  • 3 months of priority support
  • 2 years of support and updates
  • License is valid for one game
Enterprise & Custom
Custom builds and licenses for game engines and online platforms
Let's talk!
  • Priority for feature requests
  • Technical support calls
  • Custom integrations
  • Custom solutions
Can't find an option that suits your needs? Contact us and we'll be happy to help.
Bounce is not available for military, weaponry, policing, surveillance or similar applications.
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Licenses
License Bounce for a commercial project, or talk to our team about custom solutions.
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Perplex is the trade name for the business registered as 9547-3732 Québec inc.
with headquarters in Montréal, Québec, Canada
©2025 Perplex aka "9547-3732 Québec inc.". All Rights Reserved.