code: public void setRotationZ(double rotationZ) {
      this.rotationZ = rotationZ;
      this.cosZ = FastMath.cos(rotationZ);
      this.sinZ = FastMath.sin(rotationZ);
  
      fireCameraChangedEvent();
    }
docs: Set the z rotation angle in radians.
  
  @param rotationZ Z rotation angle.