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/*
* Copyright (C) 1993-2006 Robert & Jeremy Laine
* See AUTHORS file for a full list of contributors.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "disparea.h"
/** Constructs a generic view area.
*/
CDispArea::CDispArea(real izoom) :
zoom(izoom), wasResized(1)
{}
/** Calculates logical viewport rectangle to match
* the ratio of the device viewport
*/
CRect3d CDispArea::calcLRect(const CRect3d& viewRect, const CRect3d& objRect)
{
CRect3d lRect;
// avoid division by zero errors
if ((viewRect.height() == 0) || (viewRect.width() == 0))
{
lRect.min = center;
lRect.max = center;
return lRect;
}
real viewAspect = viewRect.width() / viewRect.height();
real objAspect = objRect.width() / objRect.height();
// the viewing area may not match the proportions of the sail
// so we set the logical viewport accordingly
if (objAspect > viewAspect)
{
// we are limited by the width of the window, grow logical viewport's height
lRect.min = CVector3d(objRect.min.x(),objRect.min.y()*(objAspect/viewAspect),0);
lRect.max = CVector3d(objRect.max.x(),objRect.max.y()*(objAspect/viewAspect),0);
}
else
{
// we are limited by the height of the window, grow logical viewport's width
lRect.min = CVector3d(objRect.min.x()*(viewAspect/objAspect),objRect.min.y(),0);
lRect.max = CVector3d(objRect.max.x()*(viewAspect/objAspect),objRect.max.y(),0);
}
/*
cout << "-------" << endl;
cout << "objRect w: " << objRect.width() << ", h: " << objRect.height() << endl;
cout << "viewRect w: " << viewRect.width() << ", h: " << viewRect.height() << endl;
cout << "lRect w: "<< lRect.width() << ", h: " << lRect.height() << endl;
cout << "zoom : " << zoom << endl;
*/
lRect = lRect*(1/zoom)+center;
/*
cout << "lRect w: " << lRect.width() << ", h: " << lRect.height() << endl;
cout << "-------" << endl;
*/
return lRect;
}
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