Method push

src/utils/MStack.js:18–23

(m)

  }

  push(m) {
    if (this.size === 0) Mat3.set(m, this.mats[0]);
    else Mat3.multiply(this.mats[this.size - 1], m, this.mats[this.size]);

    this.size++;
  }

  pop() {
    if (this.size > 0) this.size--;