/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: ...
   co-programmer: ...
*/

//#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_WORLD_ENTITY

#include "render_2d.h"

#include "graphics_engine.h"
#include "class_list.h"
#include "list.h"
#include "element_2d.h"

using namespace std;



/**
 * standard constructor
 */
Render2D::Render2D ()
{
   this->setClassID(CL_RENDER_2D, "Render2D");
   this->setName("Render2D");

   this->element2DList = new tList<Element2D>;
}

/**
 *  the singleton reference to this class
 */
Render2D* Render2D::singletonRef = NULL;

/**
 * standard deconstructor
 */
Render2D::~Render2D ()
{
  delete this->element2DList;

  Render2D::singletonRef = NULL;
}


/**
 * registers a 2D-element to the 2D-Renderer
 * @param element2D the element to registers
 *
 * do not use this function by yourself, because this is used by Element2D's constructor
 */
void Render2D::registerElement2D(Element2D* element2D)
{
  this->element2DList->add(element2D);
}

/**
 * unregisters a 2D-element from the 2D-Renderer
 * @param element2D The element to unregister
 *
 * do not use this function by yourself, because this is used by Element2D's destructor
 */
void Render2D::unregisterElement2D(Element2D* element2D)
{
  this->element2DList->remove(element2D);
}


void Render2D::draw() const
{
  GraphicsEngine::enter2DMode();

  tIterator<Element2D>* iterator = this->element2DList->getIterator();
  Element2D* elem = iterator->nextElement();
  while (elem != NULL)
  {
    if (elem->isVisible())
      elem->draw();
    elem = iterator->nextElement();
  }
  delete iterator;

  GraphicsEngine::leave2DMode();
}