source: orxonox.OLD/branches/presentation/src/world_entities/weapons/bsp_weapon.cc

/*
* 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: Reto Luechinger
*/


#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_WORLD_ENTITY
#include "bsp_weapon.h"
#include "loading/load_param.h"
#include "debug.h"
#include "loading/load_param_xml.h"

#include "environments/bsp_entity.h"
#include "loading/fast_factory.h"
#include "sound_engine.h"

ObjectListDefinition(BspWeapon);
CREATE_FACTORY(BspWeapon);

ObjectListDefinition(MuzzleFlash);

/**
*  Standard constructor
*/
BspWeapon::BspWeapon ( OM_LIST list )
{
        this->init( list );
}

/**
* destructs the BspWeapon, deletes allocated memory
*/
BspWeapon::~BspWeapon ()
{
  if ( soundSource_shoot.isPlaying() )
    soundSource_shoot.stop();
}

/**
* Constructor with XML Element
*/
BspWeapon::BspWeapon (const  TiXmlElement* root)
{
        this->init( OM_GROUP_00 );
        if (root != NULL)
        {
                this->loadParams(root);
        }
}
/**
* XML Loader
*/
void BspWeapon::loadParams(const TiXmlElement* root)
{
        if (root != NULL)
        {
                WorldEntity::loadParams(root);

                LoadParam(root, "Range", this, BspWeapon, setRange)
                        .describe("the range after which the Weapon hits no more")
                .defaultValues("");
                LoadParam(root, "Damage", this, BspWeapon, setDamage)
                        .describe("Damage that the weapon inflicts"); 
                LoadParam(root, "FireRate", this, BspWeapon, setFireRate)
                        .describe("how fast it shoots");
                LoadParam(root, "AlwaysHits", this, BspWeapon, setAlwaysHits)
                        .describe("No, if the weapon should hit with a probability");

                LOAD_PARAM_START_CYCLE(root, element);
                {
                        if (root != 0){
                                LoadParam_CYCLE(element, "addPoint", this, BspWeapon, addPoint)
                                .describe("Adds a new Point for Gunfire");
                        }
                }
                LOAD_PARAM_END_CYCLE(element);
        }
}

void BspWeapon::addPoint(float x, float y, float z)
{
  gunFire.push_back( new MuzzleFlash() );
        gunFire.back()->setParent( this->getParent() );
        gunFire.back()->setRelCoor(x, y, z);
}

void BspWeapon::tick( float dt )
{
  //PRINTF(0)("BSPWEAPON TICK: %d %f %f\n", bFire, bRate, dt );
        if (bFire) {
                if (bRate <= 0) {
                        bRate += fireRate;
                        this->shoot();
                }
                else {
                        bRate = bRate - dt;
                }       
        }
        else {
                bRate -= dt;
                if (bRate < 0)
                        bRate = 0;
        }

}

void BspWeapon::init( OM_LIST list )
{
        bRate = 0.0;
        bFire = false;
        range = 1000;
#ifdef DEBUG_AIMING
        debugDist = 1000;
#endif
        damage = 10;
        fireRate = 0.5;
        alwaysHits = true;

        this->registerObject(this, BspWeapon::_objectList);
        this->aimingSystem = new AimingSystem( this );
        this->aimingSystem->setParent( this );
        this->aimingSystem->toList(list);
        
        this->soundSource_shoot.setSourceNode(this);
        this->soundBuffer_shoot = OrxSound::ResourceSoundBuffer("sounds/explosions/doulette.wav");
        
}

void BspWeapon::shoot()
{

  soundSource_shoot.play( soundBuffer_shoot, OrxSound::SoundEngine::getInstance()->getEffectsVolume(), 0.5);
  
for ( std::list<MuzzleFlash*>::iterator it = gunFire.begin(); it!=gunFire.end(); it++)
{
  (*it)->explode( 0.2 );
}

std::list<WorldEntity*>::iterator entityIterator;
// for all bsp managers check all entities
Vector pos = this->getAbsCoor();
Vector dir = pos + this->getAbsDir().apply( Vector( 1, 0, 0 ) )*range;


float shortestDist = range;
for( ObjectList<BspEntity>::const_iterator bspIterator = BspEntity::objectList().begin();
     bspIterator != BspEntity::objectList().end();
     bspIterator++)
{
  float res = (dynamic_cast<BspEntity*>(*bspIterator)->getBspManager())->checkCollisionRay( pos, dir, dir.len() + 1 );

  if ( res < shortestDist )
    shortestDist = res;
}

WorldEntity* target = aimingSystem->getNearestTarget();
aimingSystem->flushList();

if ( target != NULL )
{
  if ( shortestDist < (pos - target->getAbsCoor()).len() )
  {

#ifdef DEBUG_AIMING
    printf("HIT WALL\n");
    this->debugDist = shortestDist;
#endif
    return;
  }
#ifdef DEBUG_AIMING
  else
  {
    this->debugDist = 1000;
  }
#endif
  if (!alwaysHits)
  {
    float r = rand();
    r = r/RAND_MAX;
    float res = (target->getAbsCoor() - this->getAbsCoor()).len();
    float p = 1 - res*res/range/range;
    if (r < p )
    {
#ifdef DEBUG_AIMING
      printf( "HIT %s\n", target->getClassName().c_str() );
#endif
      target->hit( this->damage, this );
    }
#ifdef DEBUG_AIMING
    else
      printf( "MISHIT %s\n", target->getClassName().c_str() );
#endif

  }
  else
  {
#ifdef DEBUG_AIMING
    printf( "HIT %s\n", target->getClassName().c_str() );
#endif
    target->hit( this->damage, this );
  }
}



        
}

void BspWeapon::draw() const
{
  WorldEntity::draw();

  for ( std::list<MuzzleFlash*>::const_iterator it = gunFire.begin(); it!=gunFire.end(); it++)
  {
    (*it)->draw();
  }
#ifdef DEBUG_AIMING
  glMatrixMode(GL_MODELVIEW);
  glPushMatrix();

  glPushAttrib(GL_ENABLE_BIT);

  glDisable(GL_LIGHTING);
  glDisable(GL_TEXTURE_2D);
  glDisable(GL_BLEND);
  glLineWidth(2.0);


  Vector mp = this->getAbsCoor();
  Vector op = this->getAbsDir().apply( Vector(1, 0, 0) );

  op *= debugDist;
  op += mp;

  glColor3f(1.0, 1.0, 1.0 );
  glBegin(GL_LINE_STRIP);
    glVertex3f(mp.x, mp.y, mp.z);
    glVertex3f(op.x, op.y, op.z);
  glEnd();

  
  glPopAttrib();
  glPopMatrix();
#endif
}

void MuzzleFlash::draw( ) const
{
  if (explosionParticles) explosionParticles->draw();
}

void MuzzleFlash::activate()
{
        if (unlikely(explosionParticles == NULL))
        {
                explosionParticles = new SpriteParticles(5000);
                explosionParticles->setName("MuzzleFlashExplosionParticles");
                explosionParticles->setMaterialTexture("textures/radial-trans-noise.png");
                explosionParticles->setLifeSpan(0.1, 0);
                explosionParticles->setRadius(0.0, 8);
                explosionParticles->setRadius(.5, 6.0);
                explosionParticles->setRadius(1.0, 2.0);
                explosionParticles->setColor(0.0, 1,0.7,0,1);
                explosionParticles->setColor(0.4, 0.8,.5,0,1);
                explosionParticles->setColor(0.8, 0.5,0,0,.8);
                explosionParticles->setColor(1.0, 0,0,0,.6);
    explosionParticles->toList(OM_DEAD_TICK);
  }
                        
        this->emitter->setSystem(explosionParticles);
        this->emitter->updateNode(.01);
        this->emitter->updateNode(.01);
        this->toList(OM_DEAD_TICK);
        this->lifeCycle = 0.0;
}

void MuzzleFlash::explode(float lifetime)
{
        MuzzleFlash* explosion = this;
        //explosion->setAbsCoor(this->getAbsCoor());
        explosion->emitter->setSize(1, 1, 1);
        explosion->activate();
        explosion->lifeTime = lifetime;
}

MuzzleFlash::MuzzleFlash ()
{
  this->explosionParticles = NULL;
  this->registerObject(this, MuzzleFlash::_objectList);
  this->toList(OM_DEAD_TICK);

  this->emitter = new BoxEmitter(Vector(10,10,10), 200, 45, M_2_PI);
  this->emitter->addNodeFlags(PNODE_PROHIBIT_DELETE_WITH_PARENT);
  this->emitter->setParent(this);
  this->emitter->setSpread(M_PI, M_PI);

  this->lifeCycle = 0.0f;
  this->lifeTime = .5f;

}


/**
 *  standard deconstructor
*/
MuzzleFlash::~MuzzleFlash ()
{
  delete this->emitter;

  /* this is normaly done by World.cc by deleting the ParticleEngine */
  if (explosionParticles != NULL)
  {
    delete explosionParticles;
    MuzzleFlash::explosionParticles = NULL;
  }
}

void MuzzleFlash::deactivate()
{
  this->emitter->setSystem(NULL);
  this->toList(OM_DEAD);
}


/**
 *  signal tick, time dependent things will be handled here
 * @param time since last tick
*/
void MuzzleFlash::tick (float dt)
{
  this->lifeCycle += dt;
  if(this->lifeTime < this->lifeCycle)
    this->deactivate();
}