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use-ammojs

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Readme

[WIP] use-ammojs

Fast Physics hooks for use with react-three-fiber.

Built on top of three-ammo, which runs the wasm ammo.js library in a seperate web-worker and syncs three objects using SharedArrayBuffers.

Why not use use-cannon instead?

use-cannon is great and a inspiration for this package, but it is missing features and lacks performance with many objects or large gltf imports. ammo.js is a direct wrapper around the powerful Bullet Physics engine.

At the time of writing however use-cannon is more mature and great for small projects.

Documentation [WIP]

1. Wrap your scene in a Physics Provider

import { Physics } from "use-ammojs";

<Physics drawDebug>
  [...] 
</Physics>

2. Make objects physical

Automatically parse Shape parameters from the three Mesh (courtesy of three-to-ammo):

import { Box } from "@react-three/drei";
import { usePhysics, ShapeType } from "use-ammojs";

function MyBox(){
    const ref = usePhysics(() => ({ mass: 1, position: [0, 2, 4], shapeType: ShapeType.BOX }));

    return (
      <Box ref={ref}>
        <meshBasicMaterial attach="material" color="red" />
      </Box>
    );
}

or define Collision Shapes manually:

TODO

or add collisions to an imported gltf scene:

TODO

3.a Add Constraints

TODO

3.b Add Raycasts

TODO

use-ammojs