the-world-engine/dist/esm/engine/physics/2d/ContactPoint2D.js

three.js based, unity like game engine for browser

import { Vector2 } from "three/src/Three";

import { Vec2 } from "../../../box2d.ts/build/index";

export class ContactPoint2D {
    di=null;
    pi=null;
    Ci=null;
    vi=null;
    bi=null;
    Vi=new Vector2;
    gr=new Vector2;
    mr=new Vector2;
    vr=0;
    Vr=0;
    yr=0;
    setData(t, e, r, i, n, o) {
        this.di = t;
        const s = t.GetFixtureA();
        const l = t.GetFixtureB();
        this.pi = s.GetUserData();
        this.Ci = s.GetBody().GetUserData().rigidbody;
        this.vi = l.GetUserData();
        this.bi = l.GetBody().GetUserData().rigidbody;
        if (o) {
            this.Vi.copy(o);
        } else {
            const t = ContactPoint2D._tempVec.Copy(s.GetBody().GetLinearVelocity());
            const e = t.SelfSub(l.GetBody().GetLinearVelocity());
            this.Vi.set(e.x, e.y);
        }
        this.gr.set(i.x, i.y);
        this.mr.set(r.x, r.y);
        this.vr = e.normalImpulse;
        this.Vr = e.tangentImpulse;
        this.yr = n;
    }
    static _tempVec=new Vec2;
    get enabled() {
        return this.di?.IsEnabled() ?? false;
    }
    get collider() {
        return this.pi;
    }
    get rigidbody() {
        return this.Ci;
    }
    get otherCollider() {
        return this.vi;
    }
    get otherRigidbody() {
        return this.bi;
    }
    get relativeVelocity() {
        return this.Vi;
    }
    get point() {
        return this.gr;
    }
    get normal() {
        return this.mr;
    }
    get normalImpulse() {
        return this.vr;
    }
    get tangentImpulse() {
        return this.Vr;
    }
    get separation() {
        return this.yr;
    }
}