source: orxonox.OLD/orxonox/branches/burli/src/world.cc @ 2595

/* 
   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: Patrick Boenzli
   co-programmer:
*/


#include "world.h"

#include <iostream>
#include <stdlib.h>
#include <math.h>

using namespace std;


/** 
   \brief Create a new World
   
   This creates a new empty world!
*/
World::World () {
  lastPlayer = null;
  lastNPC = null;
  lastEnv = null;
  primitiveMove = 0;
  step = 0;
}


World::~World () {}


/** 
   \brief Add Player
   \param player A reference to the new player object
   
   Add a new Player to the game. Player has to be initialised previously 
*/
bool World::addPlayer(Player* player) 
{
  playerList* listMember = new playerList;
  listMember->player = player;
  if ( lastPlayer != null ) 
    {
      listMember->number = lastPlayer->number + 1;
      listMember->next = lastPlayer;
    }
  else 
    {
      listMember->number = 0;
      listMember->next = null;
    }
  lastPlayer = listMember;
}


/** 
   \brief Remove Player
   \param player A reference to the new npc object
   
   Remove a new Player to the game.
*/
bool World::removePlayer(Player* player) {
  cout << "World::removeNPC not implemented yet" << endl;
}

Player* World::getLocalPlayer() 
{
  return localPlayer;
}


/** 
   \brief Add Non-Player-Character
   \param player A reference to the new npc object
   
   Add a new Non-Player-Character to the game. Player has to be initialised previously 
*/
bool World::addNPC(NPC* npc) 
{
  npcList* listMember = new npcList;
  listMember->npc = npc;
  if ( lastNPC != null ) 
    {
      listMember->number = lastNPC->number + 1;
      listMember->next = lastNPC;
    }
  else 
    {
      listMember->number = 0;
      listMember->next = null;
    }
  lastNPC = listMember;
}


/** 
   \brief Remove Non-Player Character
   \param player A reference to the new npc object
   
   Remove a new Non-Player-Character to the game.
*/
bool World::removeNPC(NPC* npc) {

  npcList* npcRef = lastNPC;
  npcList* lastRef = lastNPC;
  while ( npcRef != null ) 
    {
      if ( npcRef->npc == npc ) {
        cout << "found" << endl;
        if ( npcRef == lastRef ) {
          lastNPC = lastNPC->next;
          delete npcRef;
          npcRef = lastNPC;
          lastRef = lastNPC;
        }
        else {
          lastRef->next = npcRef->next;
          delete npcRef;
          npcRef = lastRef->next;
        }
        cout << "killed ..." << endl;
      }
      else {
        lastRef = npcRef;
        npcRef = npcRef->next;
      }
    }
  cout << "npc left" << endl;
}



/** 
   \brief Add environmental object
   \param player A reference to the new env object
   
   Add a new Environment to the world. Env has to be initialised before.
*/
bool World::addEnv(Environment* env) 
{
  envList* listMember = new envList;
  listMember->env = env;
  if ( lastEnv != null ) 
    {
      listMember->number = lastEnv->number + 1;
      listMember->next = lastEnv;
    }
  else 
    {
      listMember->number = 0;
      listMember->next = null;
    }
  lastEnv = listMember;
}




/** 
   \brief Draws the World and all Objects contained
   
   Calls the draw function of all: Objects, Players, Environement. This is the core of all graphics here.
*/
void World::drawWorld(void) 
{
  glLoadIdentity();
  gluLookAt(2*sin(DataTank::yOffset/90*3.141)+DataTank::xOffset, 
        -17.0 + DataTank::yOffset, 14.0 + 5*cos(DataTank::yOffset/50*3.141), 
        DataTank::xOffset, 0.0 + DataTank::yOffset, 
        0.0, 0.0, 1.0, 0.0);
  /* first draw all players */
  playerList* tmpPlayer = lastPlayer;
  Player* player = tmpPlayer->player;
  while( tmpPlayer != null ) 
    {
      (*tmpPlayer->player).drawPlayer();
      tmpPlayer = tmpPlayer->next;
    }
  /* second draw all npcs */
  npcList* tmpNPC = lastNPC;
  while( tmpNPC != null )
    {
      (*tmpNPC->npc).drawNPC();
      tmpNPC = tmpNPC->next;
    }

  /* now draw the rest of the world: environement */
  envList* tmpEnv = lastEnv;
  while( tmpEnv != null )
    {
      (*tmpEnv->env).drawEnvironment();
      tmpEnv = tmpEnv->next;
    }
  
  /* draw the repeating ground grid  */
  glColor3f(0.0, 1.0, 0.0); 
  glBegin(GL_LINES);
  float drawx, drawy;
  int offsetx, offsety;
  float s1, s2;
  
  for (int y = 0; y < GRIDLENGTH; y++)
  {
        drawy = y + floor(DataTank::yOffset) - GRIDLENGTH / 2;
        offsety = (int)floor(DataTank::yOffset) + y;
        if (offsety < 0)
        {
          offsety = GRIDLENGTH - ((-offsety) % GRIDLENGTH);
        }
        
        for (int x = 0; x < GRIDWIDTH; x++)
        {
          drawx = x + floor(DataTank::xOffset) - GRIDWIDTH / 2;
          offsetx = (int)floor(DataTank::xOffset) + x;
          if (offsetx < 0)
          {
                offsetx = GRIDWIDTH - ((-offsetx) % GRIDWIDTH);
          }
                  
          /* horizontal */
          /* not simplified! */
          s1 = surface[(offsetx+GRIDWIDTH   )%GRIDWIDTH][offsety%GRIDLENGTH];
          s2 = surface[(offsetx+GRIDWIDTH+1)%GRIDWIDTH][offsety%GRIDLENGTH];
          glVertex3f(drawx, drawy, s1);
          glVertex3f(drawx+1, drawy, s2);
          
          /* vertical */
          s1 = surface[offsetx%GRIDWIDTH][(offsety+GRIDLENGTH  )%GRIDLENGTH];
          s2 = surface[offsetx%GRIDWIDTH][(offsety+GRIDLENGTH+1)%GRIDLENGTH];
          glVertex3f(drawx, drawy, s1);
          glVertex3f(drawx, drawy+1, s2);
        }
  }
  glEnd();

  //primitiveMove+=0.07;
  DataTank::yOffset += step;
  
  tmpPlayer = lastPlayer;
  while( tmpPlayer != null ) 
    {
      tmpPlayer->player->yCor += step;
      /* just for testing: alway have the player in the center */
      DataTank::xOffset = (20 * DataTank::xOffset + (float)tmpPlayer->player->xCor) / 21.0;
      tmpPlayer = tmpPlayer->next;
    }
  
}


void World::initEnvironement()
{
 double rx;
 for (int y = 0; y < GRIDLENGTH; y++)
 {
    for (int x = 0; x < GRIDWIDTH; x++)
        {
          /*surface[x][y] = cos(y*3.141/8 )*0.7 * (0.6 + sin(x*3.141/5 + phase)*cos(y*3.141/5*3) * 0.4);*/
         rx = double(x - GRIDWIDTH/2 + GRIDWIDTH / 20)/GRIDWIDTH*12;
         surface[x][y] = -exp(-abs(rx))*rx*5 + cos(y*3.141/6)*0.6-3;
         surface[x][y] += (x%8 && y%12) ? 5 : 0; 
         surface[x][y] -= (x%3 && y%3) ? 0.3 : 0; 
        }       
  }
}


void World::setWorldStep(float step)
{
  this->step = step;
  cout << "setting speed to " << step << endl;
}



/** 
   \brief Updates the world and all its objects
   
   Calculates the new state of the world. User-input and AI of
   the enemies are accounted for.
*/
void World::updateWorld(void) 
{
  

}


/* collision detection */
/* fix: bad efficency: stupid brute force */

void World::detectCollision() 
{
  //cout << "World::detectCollision" << endl;
  float xOff, yOff, zOff, radius;
  npcList* tmpNPC, *tmpRef;

  //cout << "World::detectCollsions" << endl;
  /* first: check if any player's shoots trigger a collision */
  playerList* tmpPlayer = lastPlayer;
  Player* player = tmpPlayer->player;
  int state;
  while( tmpPlayer != null ) 
    {
      tmpNPC = lastNPC;
      while( tmpNPC != null )
        {
          //cout << "npc != null" << endl;
          radius = tmpNPC->npc->collisionRadius;
          //cout << "worki" << endl;
          ShootLaser::shoot* shoota = tmpPlayer->player->shootLaser->lastShoot;
          while( shoota != null )
            {
              xOff = shoota->xCor - tmpNPC->npc->xCor;
              yOff = shoota->yCor - tmpNPC->npc->yCor;
              zOff = shoota->zCor - tmpNPC->npc->zCor;
              if ( sqrt(xOff*xOff + yOff*yOff + zOff*zOff) < radius ) 
                {
                  //cout << "COLLISION " << endl;
                  int state = tmpNPC->npc->hit();
                  /* state is a value that marks if the ship dies or not */
                  /* if state == 0 the ship dies and we have to remove it */
                  /*
                  if ( state == 0 ) {
                    tmpRef = tmpNPC;
                    tmpNPC = tmpNPC->next;
                    removeNPC(tmpRef->npc);
                    break;
                  }
                  */
                }
              shoota = shoota->next;
            }
          //cout << "changing npc..." << endl;
          tmpNPC = tmpNPC->next;
          //cout << "..changing npc done" << endl;
        }
      //cout << "changing play..." << endl;
      tmpPlayer = tmpPlayer->next;
      //cout << "changing play done" << endl;
    }

  //cout << "World::detectCollisions middle" << endl;

  /* second: check if any player hits an enemy */
  tmpPlayer = lastPlayer;
  while( tmpPlayer != null ) 
    {
      tmpNPC = lastNPC;
      while( tmpNPC != null )
        {
          radius = tmpNPC->npc->collisionRadius + tmpPlayer->player->collisionRadius;
          xOff = tmpPlayer->player->xCor - tmpNPC->npc->xCor;
          yOff = tmpPlayer->player->yCor - tmpNPC->npc->yCor;
          zOff = tmpPlayer->player->zCor - tmpNPC->npc->zCor;
          if ( sqrt(xOff*xOff + yOff*yOff + zOff*zOff) < radius ) {
            //cout << "COLLISION " << endl;
            tmpNPC->npc->hit();
          }
          
          tmpNPC = tmpNPC->next;
        }
      
      tmpPlayer = tmpPlayer->next;
    }
  
  

  /* third: check if any enemy shoots a player */

  //cout << "World::detectCollisions end" << endl;
}



/** 
   \brief Routine for testing purposes.
   
   testing, testing, testing...
*/
void World::testThaTest(void) 
{
  cout << "World::testThaTest() called" << endl;
  /* test addPlayer */
  cout << "addPlayer test..." << endl;
  playerList* pl = lastPlayer;
  while ( pl != null )
    {
      cout << "player " << pl->number << " was found" << endl;
      pl = pl->next;
    }

  /* test addNPC */
  cout << "addNPC test..." << endl;
  npcList* nl = lastNPC;
  while ( nl != null )
    {
      cout << "npc " << nl->number << " was found" << endl;
      nl = nl->next;
    }


  /* test addEnv */
  cout << "addEnv test..." << endl;
  envList* en = lastEnv;
  while ( en != null )
    {
      cout << "env " << en->number << " was found" << endl;
      en = en->next;
    }

  /* test drawWorld() */
}