class Control {
  PImage img;
  float x;
  float y;
  float a;
  Glide gl = null;
  float ll = 0;
  float ul = 0;
  float ctrl = 0;

  Control(PImage img0, float x0, float y0, float a0) {
    img = img0;
    x = x0;
    y = y0;
    a = a0;
  }

  void update() {
    a -= mouseY - pmouseY;
    a = constrain(a, -135, 135);
    if (gl != null) {
      setCtrl();
      gl.setValue(ctrl);
    }
  }

  void setAngle() {
    a = map(ctrl, ll, ul, -135, 135);
  }

  void setCtrl() {
    ctrl = map(a, -135, 135, ll, ul);
  }

  void draw() {
    pushMatrix();
    translate(x, y);
    rotate(radians(a));
    image(img, 0, 0);
    popMatrix();
  }
}