/// <summary>
 /// Scene constructor taking custom parameters
 /// </summary>
 /// <param name="cannon"></param>
 /// <param name="width"></param>
 /// <param name="height"></param>
 /// <param name="gravity"></param>
 /// <param name="environment_density"></param>
 /// <param name="resistance_force"></param>
 /// <param name="shot_power"></param>
 /// <param name="projectile_mass"></param>
 /// <param name="projectile_restitution"></param>
 public Scene(Cannon cannon, uint width, uint height, double gravity, double environment_density, double resistance_force, double shot_power, double projectile_mass, double projectile_restitution)
 {
     this.cannon                 = cannon;
     cannon_scale                = cannon.length / cannon.width;
     this.width                  = width;
     this.height                 = height;
     this.gravity                = new ChangableValues(new Point(20, 5), width, text_height, gravity);
     this.environment_density    = new ChangableValues(new Point(20, 35), width, text_height, environment_density);
     this.shot_power             = new ChangableValues(new Point(20, 65), width, text_height, shot_power);
     this.projectile_radius      = new ChangableValues(new Point(20, 95), width, text_height, cannon.width);
     this.projectile_mass        = new ChangableValues(new Point(20, 125), width, text_height, projectile_mass);
     this.resistance_force       = new ChangableValues(new Point(20, 155), width, text_height, resistance_force);
     this.projectile_restitution = new ChangableValues(new Point(20, 185), width, text_height, projectile_restitution);
     displacement_force          = environment_density * gravity * Math.PI * Math.Pow(projectile_radius.value, 2);
 }
 /// <summary>
 /// Scene constructor setting default values to parameters
 /// </summary>
 /// <param name="cannon"></param>
 /// <param name="width"></param>
 /// <param name="height"></param>
 public Scene(Cannon cannon, uint width, uint height)
 {
     this.cannon            = cannon;
     cannon_scale           = cannon.length / cannon.width;
     this.width             = width;
     this.height            = height;
     gravity                = new ChangableValues(new Point(20, 5), width, text_height, 9.81);
     environment_density    = new ChangableValues(new Point(20, 35), width, text_height, 1.9);
     shot_power             = new ChangableValues(new Point(20, 65), width, text_height, 2000);
     projectile_radius      = new ChangableValues(new Point(20, 95), width, text_height, cannon.width);
     projectile_mass        = new ChangableValues(new Point(20, 125), width, text_height, 300);
     resistance_force       = new ChangableValues(new Point(20, 155), width, text_height, 0.2);
     projectile_restitution = new ChangableValues(new Point(20, 185), width, text_height, 10);
     displacement_force     = environment_density.value * gravity.value * Math.PI * Math.Pow(projectile_radius.value, 2);
 }