"V2.x Oge-example chapter II (first section) the movement of the Elves"

1. Location: Modifier_example---MovingBall2. Class Name: Movingball

(1). Sprite movement We can update the sprite's X, y position to achieve the moving effect each time we refresh, below we use Physicshandler event to move a smiley spirit, by changing the X-physicshandler event, y rate makes the sprite move.

/**
  *  define a ball wizard
  *  @author  lin
  *
   */
private static class ball extends animatedsprite {
  /* * Mobile Processing Event */
  private final physicshandler mphysicshandler;// A iupdatehandler logical transaction
 &NBSP that automatically updates the entity location;
  public ball (final float px,  final float py, string ptextureregion, final vertexbufferobjectmanager  Pvertexbufferobjectmanager)  {
   super (px, py, ptextureregion,  Pvertexbufferobjectmanager);
   this.mphysicshandler = new physicshandler (this);//instantiation of Events
    this.registerupdatehandler (This.mphysicshandler);//Register the event before it is executed
    This.mPhysicsHandler.setVelocity (demo_velocity, demo_velocity);//Set x, y rate
  }

  //Control Wizard always moves inside the screen, not outside the screen
   @Override
  protected void  Onmanagedupdate (final float psecondselapsed)  {
   if (this.mX < 0 )  {//ball  elf x coordinate is less than 0 o'clock
    this.mphysicshandler.setvelocityx (demo_velocity);// Set the x rate to positive, that is, move to the right
   } else if (This.mx + this.getwidth ()  >=  scene_width)  {//ball  Wizard x coordinates are larger than the right side of the screen, i.e. move out of the screen to the right
     This.mPhysicsHandler.setVelocityX (-demo_velocity);//set X rate to negative, i.e. move to left
   }

if (this.my < 0) {//ball elf y-coordinate is less than 0 o'clock
This.mPhysicsHandler.setVelocityY (demo_velocity);//set Y rate to positive, i.e. move down
} else if (this.my + this.getheight () >= scene_height) {//ball Wizard y-coordinate is larger than the bottom of the screen
This.mPhysicsHandler.setVelocityY (-demo_velocity);//set Y rate to negative, i.e. move upward
}

Super.onmanagedupdate (psecondselapsed);//method that executes the parent class
}
}

Oge_example Project Source Code

"V2.x Oge-example chapter II (first section) the movement of the Elves"