tagGame::MathUtil Class Reference

Some basic math related utility functions. More...

#include <MathUtil.h>

List of all members.

Static Public Member Functions
static bool	isAlmostEq (Real const x, Real const y)
	True iff x is within eps of y.
static bool	isAlmostZero (Real const x)
	True iff x is within eps of zero.
static int	round (Real const x)
	Round x to the nearest integer value.
static int	sgn (Real const x)
	Return the sign of x.
static Real	radToDeg (Real const t)
	Return t in degrees.
static Real	degToRad (Real const t)
	Return t in radians.
static Real	clamp (Real const x, Real lower, Real upper)
	Clamp x to the closed range [lower, upper].
static Real	angleClamp (Real const t)
	Clamp the angle t to the half-open range [-180, 180).
static Real	uniform01 ()
	Uniformly pick a Real in the range [0, 1].
static int	uniform (int n)
	Uniformly pick an integer in the range [0, n).
static Real	normal (Real const mean=Real(0), Real const std=Real(1))
	Pick a Real according to the normal distribution with mean and standard deviation as provided.
static Real	normalAngle (Real const mean=Real(0), Real const std=Real(70))
	Pick an angle (in degrees) according to an approximate normal distribution.

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Detailed Description

Some basic math related utility functions.

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Member Function Documentation

Real tagGame::MathUtil::angleClamp

(

Real const

t

)

[inline, static]

Clamp the angle t to the half-open range [-180, 180).

The range is half-open because the angle -180 is the same as the angle 180 and we only want one representation for an angle.

Real tagGame::MathUtil::normalAngle	(	Real const	mean = Real(0),
		Real const	std = Real(70)
	)			[inline, static]

Pick an angle (in degrees) according to an approximate normal distribution.

The normal distribution is only approximate because there is only finite support i.e. return value [-180,180]. But provided the std is less than about 70 degrees, then less than 1% of the probability mass would lie outside that range anyway.

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The documentation for this class was generated from the following file:

• MathUtil.h

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