Warning

This section contains snippets that were automatically translated from C++ to Python and may contain errors.

The <QtMath> header file provides various math functions.

These functions are partly convenience definitions for basic math operations not available in the C or Standard Template Libraries.

The header also ensures some constants specified in POSIX, but not present in C++ standards (so absent from <math.h> on some platforms), are defined:

• M_E

• The base of the natural logarithms, e = exp(1)

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

See also

qAtan() qAsin() qCos()

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

See also

qSin() qAtan() qAcos()

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

See also

qTan() qAcos() qAsin()

Returns the arctangent of a point specified by the coordinates y and x. This function will return the angle (argument) of that point.

See also

qAtan() qHypot()

Returns 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()

Returns the cosine of an angle v in radians.

See also

qSin() qTan()

This function converts the degrees in float to radians.

Example:

degrees = 180.0f
radians = qDegreesToRadians(degrees)

See also

qRadiansToDegrees()

This function converts the degrees in double to radians.

Example:

degrees = 180.0
radians = qDegreesToRadians(degrees)

See also

qRadiansToDegrees()

This function converts the degrees in double to radians.

See also

qRadiansToDegrees()

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

See also

qLn()

Returns the absolute value of v.

Returns 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()

This is an overloaded function.

Returns the distance of a point (x, y) from the origin (0, 0).

This is qSqrt (x * x + y * y), optimized. In particular, underflow and overflow may be avoided.

Accepts any mix of numeric types, returning the same floating-point type as std::hypot(). If either parameter is infinite, so is the result; otherwise, if either is a NaN, so is the result.

See also

qSqrt() qAtan2()

This is an overloaded function.

Returns the distance of a point (x, y, z) from the origin (0, 0, 0).

This is qSqrt (x * x + y * y + z * z), optimized where supported. In particular, underflow and overflow may be avoided.

Accepts any mix of numeric types, returning the same floating-point type as std::hypot(). If any parameter is infinite, so is the result; otherwise, if any is NaN, so is the result.

See also

qSqrt()

Returns the distance from origin in arbitrarily many dimensions

This is as for the two-argument and three-argument forms, supported by std::hypot(), but with as many numeric parameters as you care to pass to it. Uses first and each of the rest as coordinates, performing a calculation equivalent to squaring each, summing and returning the square root, save that underflow and overflow are avoided as far as possible.

See also

qSqrt()

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

See also

qExp()

This function returns the nearest power of two greater than value. For 0 it returns 1, and for values larger than or equal to 2^31 the result is undefined.

This is an overloaded function.

This function returns the nearest power of two greater than value. For negative values the result is undefined.

This function returns the nearest power of two greater than value. For 0 it returns 1, and for values larger than or equal to 2^63 the result is undefined.

This is an overloaded function.

This function returns the nearest power of two greater than value. For negative values the result is undefined.

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()

This function converts the radians in float to degrees.

Example:

radians = float(M_PI)
degrees = qRadiansToDegrees(radians)

See also

qDegreesToRadians()

This function converts the radians in double to degrees.

Example:

radians = M_PI()
degrees = qRadiansToDegrees(radians)

See also

qDegreesToRadians()

This function converts the radians in double to degrees.

See also

qDegreesToRadians()

Returns the sine of the angle v in radians.

See also

qCos() qTan()

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

See also

qPow() qHypot()

Returns the tangent of an angle v in radians.

See also

qSin() qCos()