/*
   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: Benjamin Grauer
   co-programmer: ...
*/

#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_IMPORTER

#include "vertex_array_model.h"

#include "stdlibincl.h"
#include <stdarg.h>

using namespace std;

/////////////
/// MODEL ///
/////////////
/**
 * @brief Creates a 3D-VertexArrayModel.
 *
 * assigns it a Name and a Type
 */
VertexArrayModel::VertexArrayModel()
{
  this->setClassID(CL_MODEL, "VertexArrayModel");

  this->bFinalized = false;
  this->newStripe();
}


/**
 * @brief deletes an VertexArrayModel.
 *
 * Looks if any from model allocated space is still in use, and if so deleted it.
 */
VertexArrayModel::~VertexArrayModel()
{
  PRINTF(4)("Deleting VertexArrayModel ");
  if (this->getName())
  {
    PRINT(4)("%s\n", this->getName());
  }
  else
  {
    PRINT(4)("\n");
  }
}


/**
 * @brief Draws the VertexArrayModels of all Groups.
 *
 * It does this by just calling the Lists that must have been created earlier.
 */
void VertexArrayModel::draw() const
{
  PRINTF(4)("drawing the 3D-VertexArrayModels\n");

  glEnableClientState(GL_VERTEX_ARRAY );
  glEnableClientState(GL_TEXTURE_COORD_ARRAY );
  glEnableClientState(GL_NORMAL_ARRAY );
  glEnableClientState(GL_COLOR_ARRAY );


  glVertexPointer(3, GL_FLOAT, 0, this->vertices.getArray());
  glNormalPointer(GL_FLOAT, 0, this->normals.getArray());
  glTexCoordPointer(2, GL_FLOAT, 0, this->texCoords.getArray());
  glColorPointer(3, GL_FLOAT, 0, this->colors.getArray());

//      glDrawElements(GL_TRIANGLE_STRIP, this->indices.getCount(), GL_UNSIGNED_BYTE, this->indices.getArray());
  for (GLuint i = 1; i < this->stripes.size(); ++i)
    {
      glDrawRangeElements(GL_TRIANGLE_STRIP,
			  this->stripes[i-1],
			  this->stripes[i],
			  this->indices.getCount(),
			  GL_UNSIGNED_BYTE,
			  this->indices.getArray());
    }
}


//////////
// MESH //
//////////
/**
 * @brief generates a new Stripe in this Model
 */
void VertexArrayModel::newStripe()
{
  this->stripes.push_back(this->vertices.getCount()-1);
}


/**
 * @brief parses a vertex-String
 * @param x the X-coordinate of the Vertex to add.
 * @param y the Y-coordinate of the Vertex to add.
 * @param z the Z-coordinate of the Vertex to add.
 */
void VertexArrayModel::addVertex(float x, float y, float z)
{
  this->vertices.addEntry(x, y, z);
  this->pModelInfo.numVertices++;
}


/**
 * @brief adds a VertexNormal.
 * @param x The x coordinate of the Normal.
 * @param y The y coordinate of the Normal.
 * @param z The z coordinate of the Normal.
 *
 * If a vertexNormal line is found this function will inject it into the vertexNormal-Array
 */
void VertexArrayModel::addNormal(float x, float y, float z)
{
  this->normals.addEntry(x, y, z);
  this->pModelInfo.numNormals++;
}


/**
 * @brief adds a Texture Coordinate
 * @param u The u coordinate of the TextureCoordinate.
 * @param v The y coordinate of the TextureCoordinate.
 *
 *  If a TextureCoordinate line is found this function will inject it into the TextureCoordinate-Array
 */
void VertexArrayModel::addTexCoor(float u, float v)
{
  this->texCoords.addEntry(u);
  this->texCoords.addEntry(v);
  this->pModelInfo.numTexCoor++;
}

/**
 * @brief adds a new Color
 * @param r the Red Component of the VertexColor to add.
 * @param g the Green Component of the VertexColor to add.
 * @param b the Blue of the VertexColor to add.
 */
void VertexArrayModel::addColor(float r, float g, float b)
{
  this->colors.addEntry(r, g, b);
  // FIXME
}


/**
 *  adds a new Face
 * @param faceElemCount the number of Vertices to add to the Face.
 * @param type The information Passed with each Vertex
*/
void VertexArrayModel::addIndice(GLubyte indice)
{
  this->indices.addEntry(indice);
}


/**
 * @brief Finalizes an Object. This can be done outside of the Class.
 */
void VertexArrayModel::finalize()
{
  // finalize the Arrays
  this->vertices.finalizeArray();
  this->texCoords.finalizeArray();
  this->normals.finalizeArray();
  this->colors.finalizeArray();
  this->indices.finalizeArray();

  this->newStripe();

  /*
    glEnableClientState(GL_VERTEX_ARRAY |
    GL_TEXTURE_COORD_ARRAY |
    GL_NORMAL_ARRAY);
  */

  this->bFinalized = true;
}



/////////////
// TESTING //
/////////////
/**
* @brief Includes a default model
*
* This will inject a Cube, because this is the most basic model.
*/
void VertexArrayModel::planeModel()
{
  unsigned int sizeX = 20, sizeY = 10;

  unsigned int i, j;
  for (i = 0; i < sizeY; i++)
    {
      for (j = 0; j < sizeX; j++)
        {
          this->addVertex((float)i - sizeY/2.0, -(float)i * (float)j/(float)sizeY/(float)sizeX * 10.0 , (float)(j) - sizeX/2.0);
          this->addNormal((float)i/(float)sizeY, 1, (float)j/(float)sizeX);
          this->addTexCoor((float)i/(float)sizeY, (float)j/(float)sizeY);
          this->addColor((float)i/20.0, 0.0, (float)j/20.0);
        }
    }

  for (i = 0; i < sizeY-1; i++)
  {
    for (j = 0; j < sizeX; j++)
    {
      this->addIndice(sizeX*i + j);
      this->addIndice(sizeX*(i+1) + j);
    }
    if (i < sizeY -1 )
      this->newStripe();
  }
}