Method update

script.js:412–444

(change, ref_time)

  }

  update(change, ref_time) {
    let f = this.getFrame(ref_time);
    if (!f) {
      return;
    }
    let index = this.getIndex(ref_time);
    if (change.scale) {
      const old_scale = f[2];
      const new_scale = f[2] * change.scale;
      let delta_x = ((this.width * old_scale) - (this.width * new_scale)) / 2;
      let delta_y = ((this.height * old_scale) - (this.height * new_scale)) / 2;
      this.frames[index][0] = f[0] + delta_x;
      this.frames[index][1] = f[1] + delta_y;
      this.frames[index][2] = new_scale;
      this.interpolate(index);
      this.set_anchor(index);
    }
    if (change.x) {
      this.frames[index][0] = change.x;
      this.interpolate(index);
      this.set_anchor(index);
    }
    if (change.y) {
      this.frames[index][1] = change.y;
      this.interpolate(index);
      this.set_anchor(index);
    }
    if (change.rotation) {
      this.frames[index][3] = f[3] + change.rotation;
      this.interpolate(index);
      this.set_anchor(index);
    }
  }

  // moveable layers have anchor points we'll want to show
  render_time(ctx, y_coord, base_width, selected) {