TGEA Fix for DamageFlash

In TGEA, the function to show the damage flash does not work. This is in part to two issues - one, a bug with pulling the correct amounts from the control object, and two, the GameRenderFilters function was not ported over. To fix this issue you must fix both issues:

getDamageFlash()

in GameBase.h, getDamageFlash and getWhiteOut are incorrectly defined.
Find these two declarations:

virtual F32 getDamageFlash() { return 1.0f; }
   virtual F32 getWhiteOut() { return 1.0f; }

and mark them const, like this:

virtual F32 getDamageFlash() const { return 1.0f; }
   virtual F32 getWhiteOut() const { return 1.0f; }

GameRenderFilters()

Here is a simplistic GameRenderFilters function, This only supports the damage flash, but you can extend it as needed. I've verified it works correctly by running around and hitting myself with Thor's Hammer.

void GameRenderFilters(const CameraQuery& camq)
{
   // Stubbed out currently - check version history for old code.
   GameConnection* connection = GameConnection::getConnectionToServer();

   F32 damageFlash = 0.0f;
   F32 whiteOut = 0.0f;
   F32 blackOut = 0.0f;

   if(connection)
   {
      damageFlash = connection->getDamageFlash();
      whiteOut = connection->getWhiteOut();
      blackOut = connection->getBlackOut();

      GuiTSCtrl *tsCtrl;
      // if your screen is not called PlayGui, you will need to change this.
      // I'd considered adding a pointer to the tsctrl to the CameraQuery, but
      // since this is just a proof of concept, I didn't bother. I will do this 
      // for real later. (I want blood splatters, etc, not just a flash...)
      if (! Sim::findObject("PlayGui", tsCtrl)) 
      {
         return;
      }

      ColorI color(255,0,0,255 * damageFlash);
      GFX->getDrawUtil()->drawRectFill(Point2I(0,0),tsCtrl->getExtent(),color);
   }
}

in addition, if you are using AFX in 1.7.1, then you will need to remove the #ifdef that prohibits GameRenderFilters from being called at all in afxTSCtrl.cpp, afxTSCtrl::onRender:

//#if !defined(TGEA_ENGINE)
  CameraQuery camq;
  if (GameProcessCameraQuery(&camq))
    GameRenderFilters(camq);
//#endif

edit: Updated with a better fix from Alex Scarborough