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/*
* Copyright 2013 Kitware, Inc.
*
* This file is part of the Shiboken Python Binding Generator project.
*
* Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
*
* Contact: PySide team <contact@pyside.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "transform.h"
#ifdef _WIN32
#include <math.h>
#include <float.h>
static inline bool isfinite(double a) { return _finite(a); }
#else
#include <cmath>
#endif
using namespace std;
Point applyHomogeneousTransform(
const Point& in,
double m11, double m12, double m13,
double m21, double m22, double m23,
double m31, double m32, double m33,
bool* okay)
{
double x = m11 * in.x() + m12 * in.y() + m13;
double y = m21 * in.x() + m22 * in.y() + m23;
double w = m31 * in.x() + m32 * in.y() + m33;
if (isfinite(w) && fabs(w) > 1e-10)
{
if (okay)
*okay = true;
return Point(x / w, y / w);
}
else
{
if (okay)
*okay = false;
return Point();
}
}
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