PlacementObjectRandom.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 <placement/PlacementObjectRandom.h>
#include <common/RandomGenerator.h>
#include <XML/XMLParser.h>

PlacementObjectRandom::PlacementObjectRandom() : totalWeight_(0)
{
}

PlacementObjectRandom::~PlacementObjectRandom()
{
}

bool PlacementObjectRandom::readXML(XMLNode *initialNode)
{
        XMLNode *node;
        while (initialNode->getNamedChild("randomobject", node, false))
        {
                RandomObject randomObject;

                // Get the weight
                randomObject.weight = 1;
                node->getNamedChild("weight", randomObject.weight, false);
                totalWeight_ += randomObject.weight;

                // Get the object
                std::string objecttype;
                XMLNode *objectNode;
                if (!node->getNamedChild("object", objectNode)) return false;
                if (!objectNode->getNamedParameter("type", objecttype)) return false;
                if (!(randomObject.object = PlacementObject::create(objecttype.c_str()))) return false;
                if (!randomObject.object->readXML(objectNode)) return false;

                objects_.push_back(randomObject);
        }
        if (!node->failChildren()) return false;

        return PlacementObject::readXML(node);
}

void PlacementObjectRandom::createObject(ScorchedContext &context,
        RandomGenerator &generator,
        unsigned int &playerId,
        PlacementType::Position &position)
{
        fixed totalWeight = generator.getRandFixed() * totalWeight_;
        fixed currentWeight = 0;

        std::vector<RandomObject>::iterator itor;
        for (itor = objects_.begin();
                itor != objects_.end();
                itor++)
        {
                RandomObject &object = (*itor);
                currentWeight += object.weight;

                if (currentWeight > totalWeight)
                {
                        PlacementObject *entry = object.object;
                        entry->createObject(context, generator, playerId, position);
                        break;
                }
        }
}

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