WeaponRedirect.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 <weapons/WeaponRedirect.h>
#include <weapons/AccessoryStore.h>
#include <engine/ActionController.h>
#include <common/Defines.h>
#include <tank/TankLib.h>
#include <math.h>

REGISTER_ACCESSORY_SOURCE(WeaponRedirect);

WeaponRedirect::WeaponRedirect() :
        hredirect_(0), vredirect_(0),
        habs_(false), vabs_(false),
        nextAction_(0)
{

}

WeaponRedirect::~WeaponRedirect()
{

}

bool WeaponRedirect::parseXML(AccessoryCreateContext &context, XMLNode *accessoryNode)
{
        if (!Weapon::parseXML(context, accessoryNode)) return false;

        if (!accessoryNode->getNamedChild("hredirect", hredirect_)) return false;
        if (!accessoryNode->getNamedChild("habs", habs_)) return false;
        if (!accessoryNode->getNamedChild("vredirect", vredirect_)) return false;
        if (!accessoryNode->getNamedChild("vabs", vabs_)) return false;

        XMLNode *subNode = 0;
        if (!accessoryNode->getNamedChild("nextaction", subNode)) return false;
        
        // Check next weapon is correct type
        AccessoryPart *accessory = context.getAccessoryStore().
                createAccessoryPart(context, parent_, subNode);
        if (!accessory || accessory->getType() != AccessoryPart::AccessoryWeapon)
        {
                return subNode->returnError("Failed to find sub weapon, not a weapon");
        }
        nextAction_ = (Weapon*) accessory;

        return true;
}

void WeaponRedirect::fireWeapon(ScorchedContext &context,
        WeaponFireContext &weaponContext, FixedVector &position, FixedVector &velocity)
{
        fixed currentMag = velocity.Magnitude();
        fixed currenth = (atan2x(velocity[1], velocity[0]) / fixed::XPI * 180) - 90;
        fixed dist = (velocity[0] * velocity[0] + velocity[1] * velocity[1]).sqrt();
        fixed currentv = atan2x(dist, velocity[2]) / fixed::XPI * 180;

        if (habs_) currenth = hredirect_.getValue(context);     // call NumberParser::getValue
        else currenth += hredirect_.getValue(context);          // to evaluate at runtime
        if (vabs_) currentv = vredirect_.getValue(context);
        else currentv += vredirect_.getValue(context);
        
        FixedVector newVelocity = TankLib::getVelocityVector(currenth, fixed(90) - currentv);
        newVelocity.StoreNormalize();
        newVelocity *= currentMag;
        
        nextAction_->fireWeapon(context, weaponContext, position, newVelocity);

}

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