Game Object 2d

class Game2D2Object {
  constructor(options) {
    this.sx = options.sx || 0
    this.sy = options.sy || 0
    this.vx = options.vx || 0
    this.vy = options.vy || 0
    this.ax = options.ax || 0
    this.ay = options.ay || 0

    this.as = options.as || 0
    this.av = options.av || 0
    this.aa = options.aa || 0

    this.radius = options.radius || 0
    this.mass = options.mass || 0
  }

  simulatePhysics(dt) {
    const dt2 = dt / 2
    const ax = this.ax
    const ay = this.ay
    const aa = this.aa

    this.sx += (this.vx + ax * dt2) * dt
    this.sy += (this.vy + ay * dt2) * dt
    this.vx += ax * dt
    this.vy += ay * dt

    this.as += (this.av + aa * dt2) * dt
    this.av += aa * dt
  }
}