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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// 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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#ifndef _MathHelper_H_
#define _MathHelper_H_
#include "../api.h"
#include <vector>
#include <set>
#include <math.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
namespace avg {
static const float PI = 3.14159265358979323846f;
static const float EPSILON = 0.00001f;
bool ispow2(int n);
int nextpow2(int n);
int safeCeil(float d);
bool almostEqual(float d1, float d2, float epsilon=EPSILON);
float invSqrt(float x);
template<class T>
T sqr(T d)
{
return d*d;
}
template<class T>
int sgn(T val)
{
return int(val/fabs(val));
}
template<class T>
std::vector<T> vectorFromCArray(int n, T* pData)
{
std::vector<T> v;
for (int i=0; i<n; ++i) {
v.push_back(*(pData+i));
}
return v;
}
template<class T>
std::vector<std::vector<T> > vector2DFromCArray(int n, int m, T* pData)
{
std::vector<std::vector<T> > v(4, std::vector<T>());
for (int i=0; i<n; ++i) {
for (int j=0; j<m; ++j) {
v[i].push_back(*(pData+j+i*m));
}
}
return v;
}
#ifndef round
template<class T>
T round(T d)
{
return floor(d + 0.5f);
}
#endif
}
#endif
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