changed src so the libpg headers are now used

[physics.git] / src / Entities / Polygon.cpp

/*
 *  Copyright (C) 2008 Patrik Gornicz, Gornicz_P (at) hotmail (dot) com.
 *
 *  This program 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "Polygon.h"

#include <pg/debug.h>
#include <pg/Vector2.h>

#include "graphics/graphics.h"


/// ***** Constructors/Destructors *****

Polygon::Polygon(const vector<Vector2>& points, const float* color)
    : PhysicsEntity(Vector2(0,0)), points(points), color(color)
{
    DASSERT(0 < points.size());

    createBindingBox();
    centerPosition();
}
Polygon::~Polygon()
{

}

/// ***** Public Class Methods *****

void Polygon::draw() const
{
    graphics::drawPolygon(points, color);
}

/// ***** Private Class Methods *****
void Polygon::createBindingBox()
{
    DASSERT(0 < points.size());

    maxP = points.at(0);
    minP = points.at(0);

    for(unsigned int i=1; i<points.size(); i++)
    {
             if(points[i].m_fX < minP.m_fX) minP.m_fX = points[i].m_fX;
        else if(points[i].m_fX > maxP.m_fX) maxP.m_fX = points[i].m_fX;

             if(points[i].m_fY < minP.m_fY) minP.m_fY = points[i].m_fY;
        else if(points[i].m_fY > maxP.m_fY) maxP.m_fY = points[i].m_fY;
    }
}

void Polygon::centerPosition()
{
    // TODO
}