#include <math.h>
#include <QtCore/qglobal.h>

Defines
#define	QT_SINE_TABLE_SIZE 256
#define	M_PI (3.14159265358979323846)
Functions
int	qCeil (qreal v)
int	qFloor (qreal v)
qreal	qFabs (qreal v)
qreal	qSin (qreal v)
qreal	qCos (qreal v)
qreal	qTan (qreal v)
qreal	qAcos (qreal v)
qreal	qAsin (qreal v)
qreal	qAtan (qreal v)
qreal	qAtan2 (qreal x, qreal y)
qreal	qSqrt (qreal v)
qreal	qLn (qreal v)
qreal	qExp (qreal v)
qreal	qPow (qreal x, qreal y)
qreal	qFastSin (qreal x)
qreal	qFastCos (qreal x)
Variables
Q_CORE_EXPORT const qreal	qt_sine_table [QT_SINE_TABLE_SIZE]

Define Documentation

#define QT_SINE_TABLE_SIZE 256

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Definition at line 59 of file qmath.h.

#define M_PI (3.14159265358979323846)

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Definition at line 261 of file qmath.h.

Function Documentation

int qCeil ( qreal v ) [inline]

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Definition at line 63 of file qmath.h.

{
#ifdef QT_USE_MATH_H_FLOATS
    if (sizeof(qreal) == sizeof(float))
        return int(ceilf(float(v)));
    else
#endif
        return int(ceil(v));
}

int qFloor ( qreal v ) [inline]

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Definition at line 73 of file qmath.h.

{
#ifdef QT_USE_MATH_H_FLOATS
    if (sizeof(qreal) == sizeof(float))
        return int(floorf(float(v)));
    else
#endif
        return int(floor(v));
}

qreal qFabs ( qreal v ) [inline]

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Definition at line 83 of file qmath.h.

{
#ifdef QT_USE_MATH_H_FLOATS
    if(sizeof(qreal) == sizeof(float))
        return fabsf(float(v));
    else
#endif
        return fabs(v);
}

qreal qSin ( qreal v ) [inline]

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Definition at line 93 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal sin_v;
    Math::Sin(sin_v, static_cast<TReal>(v));
    return static_cast<qreal>(sin_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return sinf(float(v));
        else
#    endif
            return sin(v);
#endif
}

qreal qCos ( qreal v ) [inline]

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Definition at line 109 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal cos_v;
    Math::Cos(cos_v, static_cast<TReal>(v));
    return static_cast<qreal>(cos_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return cosf(float(v));
        else
#    endif
            return cos(v);
#endif
}

qreal qTan ( qreal v ) [inline]

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Definition at line 125 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal tan_v;
    Math::Tan(tan_v, static_cast<TReal>(v));
    return static_cast<qreal>(tan_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return tanf(float(v));
        else
#    endif
            return tan(v);
#endif
}

qreal qAcos ( qreal v ) [inline]

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Definition at line 141 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal acos_v;
    Math::ACos(acos_v, static_cast<TReal>(v));
    return static_cast<qreal>(acos_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return acosf(float(v));
        else
#    endif
           return acos(v);
#endif
}

qreal qAsin ( qreal v ) [inline]

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Definition at line 157 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal asin_v;
    Math::ASin(asin_v, static_cast<TReal>(v));
    return static_cast<qreal>(asin_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return asinf(float(v));
        else
#    endif
            return asin(v);
#endif
}

qreal qAtan ( qreal v ) [inline]

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Definition at line 173 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal atan_v;
    Math::ATan(atan_v, static_cast<TReal>(v));
    return static_cast<qreal>(atan_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if(sizeof(qreal) == sizeof(float))
            return atanf(float(v));
        else
#    endif
            return atan(v);
#endif
}

qreal qAtan2	(	qreal	x,
		qreal	y
	)		`[inline]`

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Definition at line 189 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal atan2_v;
    Math::ATan(atan2_v, static_cast<TReal>(x), static_cast<TReal>(y));
    return static_cast<qreal>(atan2_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if(sizeof(qreal) == sizeof(float))
            return atan2f(float(x), float(y));
        else
#    endif
            return atan2(x, y);
#endif
}

qreal qSqrt ( qreal v ) [inline]

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Definition at line 205 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal sqrt_v;
    Math::Sqrt(sqrt_v, static_cast<TReal>(v));
    return static_cast<qreal>(sqrt_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return sqrtf(float(v));
        else
#    endif
            return sqrt(v);
#endif
}

qreal qLn ( qreal v ) [inline]

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Definition at line 221 of file qmath.h.

{
#ifdef QT_USE_MATH_H_FLOATS
    if (sizeof(qreal) == sizeof(float))
        return logf(float(v));
    else
#endif
        return log(v);
}

qreal qExp ( qreal v ) [inline]

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Definition at line 231 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal exp_v;
    Math::Exp(exp_v, static_cast<TReal>(v));
    return static_cast<qreal>(exp_v);
#else
    // only one signature
    // exists, exp(double)
    return exp(v);
#endif
}

qreal qPow	(	qreal	x,
		qreal	y
	)		`[inline]`

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Definition at line 244 of file qmath.h.

{
#ifdef Q_OS_SYMBIAN
    TReal pow_v;
    Math::Pow(pow_v, static_cast<TReal>(x), static_cast<TReal>(y));
    return static_cast<qreal>(pow_v);
#else
#    ifdef QT_USE_MATH_H_FLOATS
        if (sizeof(qreal) == sizeof(float))
            return powf(float(x), float(y));
        else
#    endif
            return pow(x, y);
#endif
}

qreal qFastSin ( qreal x ) [inline]

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Definition at line 264 of file qmath.h.

{
    int si = int(x * (0.5 * QT_SINE_TABLE_SIZE / M_PI)); // Would be more accurate with qRound, but slower.
    qreal d = x - si * (2.0 * M_PI / QT_SINE_TABLE_SIZE);
    int ci = si + QT_SINE_TABLE_SIZE / 4;
    si &= QT_SINE_TABLE_SIZE - 1;
    ci &= QT_SINE_TABLE_SIZE - 1;
    return qt_sine_table[si] + (qt_sine_table[ci] - 0.5 * qt_sine_table[si] * d) * d;
}

qreal qFastCos ( qreal x ) [inline]

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Definition at line 274 of file qmath.h.

{
    int ci = int(x * (0.5 * QT_SINE_TABLE_SIZE / M_PI)); // Would be more accurate with qRound, but slower.
    qreal d = x - ci * (2.0 * M_PI / QT_SINE_TABLE_SIZE);
    int si = ci + QT_SINE_TABLE_SIZE / 4;
    si &= QT_SINE_TABLE_SIZE - 1;
    ci &= QT_SINE_TABLE_SIZE - 1;
    return qt_sine_table[si] - (qt_sine_table[ci] + 0.5 * qt_sine_table[si] * d) * d;
}

Variable Documentation

Q_CORE_EXPORT const qreal qt_sine_table[QT_SINE_TABLE_SIZE]

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qmath.h File Reference

Defines

Functions

Variables

Define Documentation

Function Documentation

Variable Documentation