<QtCore/qmath.h> - Math Functions

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().