<QtCore/qmath.h> - Math Functions

The <QtCore/qmath.h> header provides various math functions. More...

Functions

Function Documentation

qreal qAcos ( qreal v )

Returns the arccosine of v as an angle in radians. Arccosine is the inverse operation of cosine.

See also qAtan(), qAsin(), and qCos().

qreal qAsin ( qreal v )

Returns the arcsine of v as an angle in radians. Arcsine is the inverse operation of sine.

See also qSin(), qAtan(), and qAcos().

qreal qAtan2 ( qreal x, qreal y )

Returns the arctangent of a point specified by the coordinates x and y. This function will return the angle and its direction.

See also qAtan().

qreal qAtan ( qreal v )

Returns the arctangent of v as an angle in radians. Arctangent is the inverse operation of tangent.

See also qTan(), qAcos(), and qAsin().

int qCeil ( qreal v )

Return the ceiling of the value v.

The ceiling is the smallest integer that is not less than v. For example, if v is 41.2, then the ceiling is 42.

See also qFloor().

qreal qCos ( qreal v )

Returns the cosine of an angle v in radians.

See also qSin() and qTan().

qreal qExp ( qreal v )

Returns the exponential function of e to the power of v.

See also qLn().

int qFloor ( qreal v )

Return the floor of the value v.

The floor is the largest integer that is not greater than v. For example, if v is 41.2, then the floor is 41.

See also qCeil().

qreal qLn ( qreal v )

Returns the natural logarithm of v. Natural logarithm uses base e.

See also qExp().

qreal qPow ( qreal x, qreal y )

Returns the value of x raised to the power of y. That is, x is the base and y is the exponent.

See also qSqrt().

qreal qSin ( qreal v )

Returns the sine of the angle v in radians.

See also qCos() and qTan().

qreal qSqrt ( qreal v )

Returns the square root of v. This function returns a NaN if v is a negative number.

See also qPow().

qreal qTan ( qreal v )

Returns the tangent of an angle v in radians.

See also qSin() and qCos().