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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $TROLLTECH_DUAL_LICENSE$
**
****************************************************************************/
#ifndef QMATH3DUTIL_P_H
#define QMATH3DUTIL_P_H
#include <QtGui/qmath3dglobal.h>
#include <QtCore/qmath.h>
QT_BEGIN_NAMESPACE
#ifdef QT_GL_FIXED_PREFERRED
#define qvtsqrt(x) ((x).sqrtF())
#else
#define qvtsqrt(x) qSqrt((x))
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
void qt_math3d_sincos(qreal degrees, qrealinner *s, qrealinner *c);
#ifdef QT_GL_FIXED_PREFERRED
inline qrealinner qf2vt_round(qreal x)
{
QFixedPt<16> result;
if (x >= 0.0f)
result.setBits(int(x * 65536.0f + 0.5f));
else
result.setBits(int(x * 65536.0f - 0.5f));
return result;
}
// Helper macros for computing dot products without losing precision.
// In fixed-point mode, a 64-bit intermediate result is used.
#define qvtmul64(x,y) ((qint64((x).bits())) * (qint64((y).bits())))
#define qvtsqrt64(x) \
(qt_math3d_fixed_sqrt((x) << 16) / (qreal)(1 << 24))
#define qvtdot64(x) ((x) / (qreal)(((qint64)1) << 32))
#else
inline qrealinner qf2vt_round(qreal x)
{
return x;
}
#define qvtmul64(x,y) ((x) * (y))
#define qvtsqrt64(x) (qvtsqrt((x)))
#define qvtdot64(x) ((x))
#endif
QT_END_NAMESPACE
#endif
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