WeaponScatterPosition.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/WeaponScatterPosition.h>
#include <weapons/AccessoryStore.h>
#include <engine/ActionController.h>
#include <landscapemap/LandscapeMaps.h>
#include <landscapedef/LandscapeTex.h>
#include <common/Defines.h>
#include <math.h>

REGISTER_ACCESSORY_SOURCE(WeaponScatterPosition);

WeaponScatterPosition::WeaponScatterPosition()
{

}

WeaponScatterPosition::~WeaponScatterPosition()
{

}

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

        // Get the next weapon
        XMLNode *subNode = 0;
        if (!accessoryNode->getNamedChild("aimedweapon", 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");
        }
        aimedWeapon_ = (Weapon*) accessory;

        if (!accessoryNode->getNamedChild("landonly", landonly_)) return false;
        if (!accessoryNode->getNamedChild("landheight", landheight_)) return false;
        if (!accessoryNode->getNamedChild("scatterpercentage", scatterpercentage_)) return false;

        return true;
}

void WeaponScatterPosition::fireWeapon(ScorchedContext &context,
        WeaponFireContext &weaponContext, FixedVector &p, FixedVector &velocity)
{
        // Mininum height, if we are grounding
        fixed allowedHeight = 0;
        LandscapeTex &tex = *context.getLandscapeMaps().getDefinitions().getTex();
                if (tex.border->getType() == LandscapeTexType::eWater)
        {
                LandscapeTexBorderWater *water = 
                        (LandscapeTexBorderWater *) tex.border;

                allowedHeight = water->height;
        }

        fixed scatterpercentage = scatterpercentage_.getValue(context);

        fixed arenaWidth = fixed(context.getLandscapeMaps().getGroundMaps().getArenaWidth());
        fixed arenaHeight = fixed(context.getLandscapeMaps().getGroundMaps().getArenaHeight());
        fixed scatterWidth = arenaWidth * scatterpercentage / 100;
        fixed scatterHeight = arenaHeight * scatterpercentage / 100;

        FixedVector pos;
        RandomGenerator &random = context.getActionController().getRandom();
        bool ok = false;
        while (!ok)
        {
                ok = true;

                pos[0] = p[0] + (random.getRandFixed() * scatterWidth) - (scatterWidth / 2);
                pos[1] = p[1] + (random.getRandFixed() * scatterHeight) - (scatterHeight / 2);
                pos[2] = p[2];
                if (landheight_)
                {
                        pos[2] = context.getLandscapeMaps().getGroundMaps().getInterpHeight(
                                pos[0], pos[1]);
                }

                if (landonly_)
                {
                        if (pos[2] < allowedHeight)
                        {
                                ok = false;
                                allowedHeight -= fixed(true, 100);
                        }
                }
        }

        aimedWeapon_->fireWeapon(context, weaponContext, pos, velocity);

}

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