mylingo3d/src/display/core/PhysicsObjectManager/enableCannon.ts

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import { Cancellable } from "@lincode/promiselikes"
import loadCannon from "./cannon/loadCannon"
import { cannonSet } from "./cannon/cannonLoop"
import scene from "../../../engine/scene"
import PhysicsObjectManager from "."
import PhysicsUpdate from "./PhysicsUpdate"

const physicsGroups = <const>[1, 2, 4, 8, 16, 32]
const physicsGroupIndexes = <const>[0, 1, 2, 3, 4, 5]

export default async function (
    this: PhysicsObjectManager,
    handle: Cancellable
) {
    if (handle.done) return

    scene.attach(this.outerObject3d)

    const { slipperyMaterial, defaultMaterial, world, Body, Vec3 } =
        await loadCannon()

    if (handle.done) return

    const body = (this.cannonBody = new Body({
        mass: this._mass ?? 1,
        material: this._slippery ? slipperyMaterial : defaultMaterial,
        collisionFilterGroup: physicsGroups[this._physicsGroup ?? 0],
        collisionFilterMask: physicsGroupIndexes
            .filter((index) => !this._ignorePhysicsGroups?.includes(index))
            .map((index) => physicsGroups[index])
            .reduce((acc, curr) => acc + curr, 0)
    }))
    await this.physicsShape()

    if (handle.done) return

    if (this._physics === "2d") {
        body.angularFactor = new Vec3(0, 0, 1)
        body.linearFactor = new Vec3(1, 1, 0)
    }
    if (this._noTumble) body.angularFactor = new Vec3(0, 0, 0)

    body.position.copy(this.outerObject3d.position as any)
    body.quaternion.copy(this.outerObject3d.quaternion as any)

    this.rotationUpdate = new PhysicsUpdate()
    this.positionUpdate = new PhysicsUpdate()
    world.addBody(body)
    cannonSet.add(this)

    handle.then(() => {
        world.removeBody(body)
        cannonSet.delete(this)
        this.cannonBody = undefined
        this.rotationUpdate = undefined
        this.positionUpdate = undefined
    })
}