source: orxonox.OLD/trunk/src/ai/attack_module.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: Thomas Fahrni
   co-programmer:
*/
#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_AI

#include "attack_module.h"
#include "ai_engine.h"
#include "state.h"
#include "debug.h"
#include "player.h"
#include "playable.h"
#include "npcs/npc_test.h"
#include "weapons/weapon.h"
#include "projectiles/projectile.h"

#include "shell_command.h"
SHELL_COMMAND(setDistanceToPlayer, AttackModule, setDistanceToPlayer);
SHELL_COMMAND(setDistanceToNPC, AttackModule, setDistanceToNPC);
SHELL_COMMAND(setMaxAccleartion, AttackModule, setMaxAccleartion);
SHELL_COMMAND(setTestValue, AttackModule, setTestValue);
SHELL_COMMAND(setTestValue2, AttackModule, setTestValue2);

float AttackModule::distanceToPlayer=15;
float AttackModule::distanceToNPC=2;
float AttackModule::maxAccleration=300.0f;
float AttackModule::testValue=2;
float AttackModule::testValue2=40;

void AttackModule::setDistanceToPlayer(float newValue){ distanceToPlayer=newValue; }
void AttackModule::setDistanceToNPC(float newValue){ distanceToNPC=newValue; }
void AttackModule::setMaxAccleartion(float newValue){ maxAccleration=newValue; }
void AttackModule::setTestValue(float newValue){ testValue=newValue; }
void AttackModule::setTestValue2(float newValue){ testValue2=newValue; }

AttackModule::AttackModule()
{
        tickCount=0;
        randomFreq=40;
        fireTimeout=1;
}


void AttackModule::process(float dt)
{
        //PRINTF(0)("attack process\n");

        if(npc == NULL)return;

        Vector tmpVector;
        float tmpFloat;
        Vector npcCollision;
        Vector playerCollision;

        weight=1;

        //get information about player
        Player* pl = State::getPlayer();
        if( pl == NULL)return;
        Vector playerPosition = pl->getPlayable()->getAbsCoor();
        float playerRadius=getRadius( pl->getPlayable() );

        //get information about myself
        Vector myPosition = npc->getAbsCoor();
        float myRadius = getRadius(npc);
        //float vMax=1000.0f/myRadius;
        float vMax=maxSpeed;
        float aMax=1000/myRadius;

        //anti player collision
        Vector vectorToPlayer = playerPosition - myPosition;

        tmpFloat=vectorToPlayer.len()-playerRadius-myRadius-distanceToPlayer;
        if(tmpFloat<0.1)tmpFloat=0.1;
        playerCollision=vectorToPlayer/(tmpFloat*tmpFloat)*(-1);


        //anti NPC collision
        for(ObjectList<WorldEntity>::const_iterator it = WorldEntity::objectList().begin(); it != WorldEntity::objectList().end(); ++it)
        {
                if((*it)->isA(Weapon::staticClassID()) )continue;
                if((*it)->isA(Projectile::staticClassID()) )continue;
                if(*it==npc)continue;

                tmpVector=myPosition-(*it)->getAbsCoor();
                tmpFloat=tmpVector.len()-myRadius-distanceToNPC-getRadius(*it);

                if(tmpFloat<0.1)tmpFloat=0.1;
                tmpVector=tmpVector/(tmpFloat*tmpFloat);

                npcCollision=npcCollision+tmpVector;
        }


        //random movement
        //randomFreq=testValue2;
        if(++tickCount>=randomFreq){
                tickCount=0;
                int x = (rand()%101)-50;                        //-50-50
                int z = (rand()%101)-50;                        //-50-50
                randomVector=Vector(x,0,z);
                randomFreq=(rand()%81)+70;                      //70-150 Ticks
        }



        //calculate correction vector
        Vector vectorToDestination=destination-myPosition;

        Vector correction=              playerCollision*40*3 *6/myRadius
                                                                +       npcCollision*50*3 *6/myRadius
                                                                +       destinationMovement*2//-movement
                                                                +       (vectorToDestination-movement)*3
                                                                +       (randomVector * testValue);


        correction.y=0;


        //limit accleration
        float correctionLen=correction.len();
        if(correctionLen>maxAccleration*dt)correction=correction/correctionLen*maxAccleration*dt;
        movement+=correction;


        //limit speed
        float movementLen=movement.len();
        if(movementLen>vMax)movement=movement/movementLen*vMax;


        //move NPC...
        npc->shiftCoor(movement * dt);


        //rotate NPC
        view = target->getAbsCoor()-myPosition;
        Vector randomView=view.cross(Vector(0,1,0)).getNormalized();
        randomView=randomView*((rand()%4)-2);

        view = target->getAbsCoor()+randomView-myPosition;
        view = view.cross( Vector(0,1,0) ).getNormalized();

        npc->setAbsDirSoft( Quaternion( view, Vector(0,1,0)),8/myRadius);


        if(npc->isA(NPC::staticClassID()) ){
                fireTimeout-=dt;
                if(fireTimeout<=0){
                        fireTimeout=(rand()%21)/10+1;
                        //std::cout << "Fiiiiirrreee!\n";
                        NPC* npc2 = static_cast<NPC*>(npc);
                        npc2->fire();
                }
        }
}