laLitterBox.cpp

/*

Jump'n'Run Engine
http://www.atanaslaskov.com/jnr/

BSD LICENSE
Copyright (c) 2007-2013, Atanas Laskov
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ATANAS LASKOV BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

//
// FILE: laLitterBox.cpp
//
// Copyright (C) 2007-2013 Atanas Laskov, <latanas@gmail.com>
//
#include "stdafx.h"
#include "Core-Level-JR.h"

laLitterPools::laLitterPools(void)
{
}

laLitterPools::~laLitterPools(void)
{
}

laPoint3 laLitterPools::getRandomPosition()
{
    laPoint3 pos = _ptPivot;

    pos[0] += ((rand()%1000)/1000.0) * __ptSize.x();
    pos[1] += ((rand()%1000)/1000.0) * __ptSize.y();
    pos[2] += ((rand()%1000)/1000.0) * __ptSize.z();

    return pos;
}

unsigned laLitterPools::getRandomPopulation()
{
    if(_nMaxPolulation!=_nMinPolulation)
        return rand()%(_nMaxPolulation-_nMinPolulation) + _nMinPolulation + 1;
    else return _nMinPolulation;
}

unsigned laLitterPools::getRandomElement()
{
    return _arPools[rand()%_nPoolsz];
}

double laLitterPools::getRandomAngle()
{
    return ((rand()%1000)/1000.0) * _dAngleVar;
}


void laLitterPools::setTS(laTileset* pTileset)
{
    _pTileset = pTileset;

    for(unsigned i=0; i<_nPoolsz; i++)
    {
        _arPools[i] = _pTileset->getElementIndex(_strNames+i*64);

        if(_arPools[i]==_pTileset->getElementCnt())
            throw laError("Element '%s' requested as litter Pools element was not found",
            _strNames+i*64);
    }
}

void laLitterPools::load(class laFileParser *fp)
{
    fp->readText(_strName);
    fp->readObj(&_ptPivot);
    fp->readObj(&__ptSize, M_FALSE);

    fp->readDouble(&_dAngleVar);
    fp->readObj(&_AngleVector, M_FALSE);

    _ptPivot *= M_UNIT;
    __ptSize *= M_UNIT;

    fp->readUnsigned(&_nMinPolulation);
    fp->readUnsigned(&_nMaxPolulation, M_FALSE);
    fp->readUnsigned(&_nPoolsz);

    _arPools = new unsigned[_nPoolsz];
    _strNames = new char[_nPoolsz*64];

    for(unsigned i=0; i<_nPoolsz; i++)
    {
        fp->readText(_strNames+i*64);
    }
}

laLitterBox::laLitterBox(void)
{
    _pTileset = NULL;
    _strPoolsName[0] = '\0';
    _nObjectCount = 0;
}

laLitterBox::~laLitterBox(void)
{
}

//Populate the litter box
void laLitterBox::litter(laTileset* pTileset)
{
    //Loacte the Pools
    unsigned nLitterPools;
    laLitterPools* pPools;

    _pTileset = pTileset;
    nLitterPools = _pTileset->getLitterPoolsIndex(_strPoolsName);

    if(nLitterPools>=_pTileset->getLitterPoolsCount())
        throw laError("Invalid litter Pools index %d for Pools size %d",
        nLitterPools, _pTileset->getLitterPoolsCount());

    if(nLitterPools>=_pTileset->getLitterPoolsCount())
        throw laError("Litter Pools '%s' was requested but not found in the tileset",
            _strPoolsName);

    pPools = _pTileset->getLitterPools(nLitterPools);

    //Litter
    _nObjectCount = pPools->getRandomPopulation();

    _arObjects = new unsigned[_nObjectCount];
    _arPositions = new laPoint3[_nObjectCount];
    _arAngles = new double[_nObjectCount];

    _AngleVector = pPools->getAngleVector();

    for(unsigned i=0; i<_nObjectCount; i++)
    {
        _arObjects[i]   = pPools->getRandomElement();
        _arPositions[i] = pPools->getRandomPosition();
        _arAngles[i]    = pPools->getRandomAngle();
    }
}

//draw
void laLitterBox::drawGeometry(laRenderer *r, laPoint3 pos)
{
    for(unsigned i=0; i<_nObjectCount; i++)
    {
        laPoint3 mod_pos = pos;
        mod_pos += _arPositions[i];

        r->transPush();
        r->transTranslate(mod_pos);
        r->transRotate(_arAngles[i], _AngleVector);

        _pTileset->getElement(_arObjects[i])->drawGeometry(r);

        r->transPop();
    }
}

void laLitterBox::drawFx(laRenderer *r, laPoint3 pos)
{
    for(unsigned i=0; i<_nObjectCount; i++)
    {
        laPoint3 mod_pos = pos;
        mod_pos += _arPositions[i];

        r->transPush();
        r->transTranslate(mod_pos);
        r->transRotate(_arAngles[i], _AngleVector);

        _pTileset->getElement(_arObjects[i])->drawFx(r);

        r->transPop();
    }
}

//This method is part of the laLoadableObj interface
void laLitterBox::load(class laFileParser *fp)
{
    fp->readText(_strPoolsName, M_FALSE);
}