Expand ShapeBase::sethidden

In my project i have lots of pickup items that also have particle FX to support the item mesh. I was havening trouble in my item::onCollision call, setting the item.setHidden(true); was fine for getting the item out of the way, and being the item::OnAdd can create one emitter using item.particle = new ParticleEmitterNode simply using item.particle.delete(); would clear out that particle( not a very dynamic and flexible way to do this..). But i find no easy way to add the particle back when using the item.Respawn(); call.

There may be an much easy way to do this, but i decided to add in SHAPEBASE::onvisable(); and SHAPEBASE::onhidden(); script callbacks. Now when i call THING.sethidden(true); the THING::onhidden(); call is made, where i have a function to turn off emitters, play a sound FX, ect. When the THING.sethidden(false); is made, The extra FX can be re-activated using SHAPEBASE::onvisable(); function.

The magic is:
Con::executef(mDataBlock,3,"onvisable",scriptThis(),Con::getIntArg(mDataBlock->getId())); And may be used in any number of places to add script callbacks for any number of conditions.


SHAPEBASE.CC

void ShapeBase::setHidden(bool hidden)
{
   if (hidden != mHidden) 
   {
      // need to set a mask bit to make the ghost manager delete copies of this object
      // hacky, but oh well.
      setMaskBits(CloakMask);
      if (mHidden)
	  {

         addToScene();
	Con::executef(mDataBlock,3,"onvisable",scriptThis(),Con::getIntArg(mDataBlock->getId()));

	  }
      else
	  {
         removeFromScene();
	Con::executef(mDataBlock,3,"onhidden",scriptThis(),Con::getIntArg(mDataBlock->getId()));
	  }

      mHidden = hidden;
   }
}