Phaser.Camera.js updateTargetTrackSlow

camera.js

  updateTargetTrackSlow() {
    // We always have a deadzone. If we don't, that means we haven't set the target yet so
    // there's no sense in doing anything in this method yet.
    if (!this.deadzone) {
      return;
    }
    this._targetPosition.copyFrom(this.target);

    if (this.target.parent) {
      this._targetPosition.multiply(this.target.parent.worldTransform.a, this.target.parent.worldTransform.d);
    }

    let edge = this._targetPosition.x - this.view.x;
    let deltaX = 0;
    let deltaY = 0;
    if (edge < this.deadzone.left) {
      deltaX = this._targetPosition.x - this.view.x - this.deadzone.left;
    } else if (edge > this.deadzone.right) {
      deltaX = this._targetPosition.x - this.view.x - this.deadzone.right;
    }

    edge = this._targetPosition.y - this.view.y;
    if (edge < this.deadzone.top) {
      deltaY = this._targetPosition.y - this.view.y - this.deadzone.top;
    } else if (edge > this.deadzone.bottom) {
      deltaY = this._targetPosition.y - this.view.y - this.deadzone.bottom;
    }

    if (this.target.standing) {
      deltaY = this._targetPosition.y - this.view.y - this.deadzone.bottom;
    }

    this.view.x += Math.ceil(deltaX * 0.1);
    this.view.y += Math.ceil(deltaY * 0.05);
  }