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math Namespace Reference

Math related functions and classes. More...

Compounds
class	math::matrix4
	A 4x4 matrix. More...
class	math::quaternion
	A quaternion. More...
class	math::vector3
	A 3-dimensional vector. More...
Functions
double	rand01 (void)
	Returns a random number between 0.0 and 1.0.
double	to_degrees (double x)
	Converts radians to degrees. More...
double	to_radians (double x)
	Converts degrees to radians. More...
bool	equals (double x, double y)
	Precision aware equals. More...
template<class T> void	swap (T &x, T &y)
	Swaps x and y. More...
double	sign (double x)
	Finds the sign of x. More...
bool	same_sign (double x, double y)
	Checks if x and y share the same sign. More...
bool	negative (double x)
	Check if x is negative. More...
bool	positive (double x)
	Check if x is positive. More...
math::vector3	cross (const math::vector3 &lhs, const math::vector3 &rhs)
void	add (math::vector3 &dest, const math::vector3 &lhs, const math::vector3 &rhs)
void	subtract (math::vector3 &dest, const math::vector3 &lhs, const math::vector3 &rhs)
void	multiply (math::vector3 &dest, const math::vector3 &lhs, const math::vector3 &rhs)
void	divide (math::vector3 &dest, const math::vector3 &lhs, const math::vector3 &rhs)
void	multiply (math::vector3 &dest, const math::vector3 &lhs, real_t rhs)
void	multiply (math::vector3 &dest, real_t rhs, const math::vector3 &lhs)
real_t	dot (const math::vector3 &lhs, const math::vector3 &rhs)

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Detailed Description

Math related functions and classes.

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Function Documentation

bool equals (  double    x, double    y )  [inline]

Precision aware equals. Returns true if x is equal to y. To account for precision errors, true is returned if x differs from y by less than MATH_EPSILON. Definition at line 59 of file mathematics.h. Referenced by math::quaternion::get_angle_axis, math::matrix4::get_inverted_rotation, math::vector3::normalize, math::vector3::operator!=, math::vector3::operator==, and math::quaternion::slerp.

bool negative (  double    x )  [inline]

Check if x is negative. Returns: true if x is less than 0.0. Definition at line 115 of file mathematics.h.

bool positive (  double    x )  [inline]

Check if x is positive. Returns: true if x is greater than or equal to 0.0. Definition at line 129 of file mathematics.h.

bool same_sign (  double    x, double    y )  [inline]

Checks if x and y share the same sign. Returns: true if x and y share the same sign. Definition at line 101 of file mathematics.h.

double sign (  double    x )  [inline]

Finds the sign of x. Returns: -1.0 if x is less than 0.0, 1.0 otherwise. Definition at line 87 of file mathematics.h.

template<class T> void swap (  T &    x, T &    y )  [inline]

Swaps x and y. Templated swap function. Assumes the following: type has copy constructor the assignment operator is defined for type Note: std::swap() works just as well. This function is included here to be backwards compatible with old code. Definition at line 75 of file mathematics.h. Referenced by math::matrix4::transpose.

double to_degrees (  double    x )  [inline]

Converts radians to degrees. Parameters: x  double in radians Returns: x converted to degrees. Definition at line 37 of file mathematics.h.

double to_radians (  double    x )  [inline]

Converts degrees to radians. Parameters: x  double in degrees Returns: x converted to radians. Definition at line 48 of file mathematics.h.

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