source: orxonox.OLD/branches/adm/src/world_entities/weapons/bsp_weapon.cc @ 10689

/*
* 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"

ObjectListDefinition(BspWeapon);
CREATE_FACTORY(BspWeapon);

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

/**
* destructs the BspWeapon, deletes allocated memory
*/
BspWeapon::~BspWeapon ()
{
          // will be deleted
}

/**
* Constructor with XML Element
*/
BspWeapon::BspWeapon (const  TiXmlElement* root)
{
        this->init();
        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");
        }
}

        

void BspWeapon::tick( float 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()
{
        bRate = 0;
        bFire = true;
        range = 1000;
        damage = 10;
        fireRate = 0.5;
        alwaysHits = true;

        this->registerObject(this, BspWeapon::_objectList);
        this->aimingSystem = new AimingSystem( this );
        this->aimingSystem->setParent( this );
        this->aimingSystem->toList(OM_GROUP_00);
}

void BspWeapon::shoot()
{
        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();

        bool hit = false;

        if ( target == NULL )
                printf("NOTING HIT\n");
        else
        {
                printf( "HIT %s\n", target->getClassName().c_str() );

                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 )
                                hit = true;
                }
                else hit = true;
        }

        if ( !hit )
        {
                Vector explosionPos = this->getAbsCoor() + this->getAbsDir().apply( Vector( 1, 0, 0 ) )*shortestDist;

                //TODO create explosion at explosionPos
        }

        
}

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


  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 *= 100;
  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();
  
}