react-native-filament/lib/module/bullet/hooks/useRigidBody.js

A real-time physically based 3D rendering engine for React Native

"use strict";

import { BulletAPI } from '../bulletApi';
import { useEffect, useState } from 'react';
import { FilamentWorkletContext } from '../../native/FilamentProxy';
export function useRigidBody(props) {
  const originVec = props != null && 'origin' in props ? props.origin : undefined;
  const transform = props != null && 'transform' in props ? props.transform : undefined;
  const {
    mass,
    shape,
    friction,
    activationState,
    damping,
    world,
    id,
    collisionCallback
  } = props ?? {};
  const originX = originVec?.[0];
  const originY = originVec?.[1];
  const originZ = originVec?.[2];
  const [body, setBody] = useState();
  useEffect(() => {
    if (mass == null || shape == null || id == null) {
      return;
    }
    const getBody = FilamentWorkletContext.runAsync(() => {
      'worklet';

      if (originX != null && originY != null && originZ != null) {
        return BulletAPI.createRigidBody(mass, originX, originY, originZ, shape, id, collisionCallback);
      }
      if (transform) {
        return BulletAPI.createRigidBodyFromTransform(mass, transform, shape, id, collisionCallback);
      }
      throw new Error('Either origin or transform must be provided');
    });
    getBody.then(setBody);
  }, [id, mass, originX, originY, originZ, collisionCallback, shape, transform]);
  useEffect(() => {
    if (friction == null || body == null) {
      return;
    }
    body.friction = friction;
  }, [body, friction]);
  useEffect(() => {
    if (activationState == null || body == null) {
      return;
    }
    body.activationState = activationState;
  }, [body, activationState]);
  useEffect(() => {
    if (damping == null || body == null) {
      return;
    }
    body.setDamping(damping[0], damping[1]);
  }, [body, damping]);
  useEffect(() => {
    if (world == null || body == null) {
      return;
    }
    world.addRigidBody(body);
    return () => {
      world.removeRigidBody(body);
    };
  }, [body, world]);
  return body;
}
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