TargetDamageCalc.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D 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 of the License, or
//    (at your option) any later version.
//
//    Scorched3D is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <target/TargetDamageCalc.h>
#include <tank/TankContainer.h>
#include <target/TargetLife.h>
#include <target/TargetSpace.h>
#include <common/Logger.h>
#include <engine/ActionController.h>
#include <actions/TankDamage.h>

void TargetDamageCalc::explosion(ScorchedContext &context,
                                                           Weapon *weapon,WeaponFireContext &weaponContext,
                                                           FixedVector &position, fixed radius,
                                                           fixed damageAmount, bool checkFall,
                                                           bool shieldOnlyDamage)
{
        std::map<unsigned int, Target *> collisionTargets;
        context.getTargetSpace().getCollisionSet(position, radius, collisionTargets, true);
        std::map<unsigned int, Target *>::iterator itor;
        for (itor = collisionTargets.begin();
                itor != collisionTargets.end();
                itor++)
        {
                Target *current = (*itor).second;
                if (!current->getAlive()) continue;
                
                // Check if the explosion causes damage
                fixed dist = current->getLife().collisionDistance(position);
                if (dist < radius)
                {
                        // Direct hit by explosion
                        fixed damage = 100;
                        if (dist > radius / 3)
                        {
                                damage = ((dist - (radius / 3)) / (radius * fixed(true, 6600))) * 100;
                                damage = fixed(100) - damage;
                        }

                        damageTarget(context, current, weapon, weaponContext, 
                                damage * damageAmount, true, checkFall, shieldOnlyDamage);
                }
                else 
                {
                        FixedVector &currentPosition = current->getLife().getCenterPosition();
                        FixedVector direction = position - currentPosition;
                        fixed dist2d = (direction[0] * direction[0] + 
                                direction[1] * direction[1]).sqrt();
                        if (dist2d < radius + 5)
                        {
                                // explosion under tank
                                damageTarget(context, current, weapon, weaponContext, 
                                        0, true, checkFall, shieldOnlyDamage);
                        }
                }
        }
}

void TargetDamageCalc::damageTarget(ScorchedContext &context,
                                                                Target *target, Weapon *weapon, 
                                                                WeaponFireContext &weaponContext, fixed damage,
                                                                bool useShieldDamage, bool checkFall,
                                                                bool shieldOnlyDamage)
{
        // Remove the correct damage from the tanks
        TankDamage *tankDamage = new TankDamage(
                weapon, target->getPlayerId(), weaponContext, 
                damage, useShieldDamage, checkFall, shieldOnlyDamage);
        context.getActionController().addAction(tankDamage);
}

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