These all operate component-wise. More...

Functions
template<typename genType >
genType	glm::abs (genType const &x)
	Returns x if x >= 0; otherwise, it returns -x. More...

template<typename genType >
genType	glm::sign (genType const &x)
	Returns 1.0 if x > 0, 0.0 if x == 0, or -1.0 if x < 0. More...

template<typename genType >
genType	glm::floor (genType const &x)
	Returns a value equal to the nearest integer that is less then or equal to x. More...

template<typename genType >
genType	glm::trunc (genType const &x)
	Returns a value equal to the nearest integer to x whose absolute value is not larger than the absolute value of x. More...

template<typename genType >
genType	glm::round (genType const &x)
	Returns a value equal to the nearest integer to x. More...

template<typename genType >
genType	glm::roundEven (genType const &x)
	Returns a value equal to the nearest integer to x. More...

template<typename genType >
genType	glm::ceil (genType const &x)
	Returns a value equal to the nearest integer that is greater than or equal to x. More...

template<typename genType >
genType	glm::fract (genType const &x)
	Return x - floor(x). More...

template<typename genType >
genType	glm::mod (genType const &x, genType const &y)
	Modulus. More...

template<typename genType >
genType	glm::mod (genType const &x, typename genType::value_type const &y)
	Modulus. More...

template<typename genType >
genType	glm::modf (genType const &x, genType &i)
	Returns the fractional part of x and sets i to the integer part (as a whole number floating point value). More...

template<typename genType >
genType	glm::min (genType const &x, genType const &y)
	Returns y if y < x; otherwise, it returns x. More...

template<typename genType >
genType	glm::min (genType const &x, typename genType::value_type const &y)

template<typename genType >
genType	glm::max (genType const &x, genType const &y)
	Returns y if x < y; otherwise, it returns x. More...

template<typename genType >
genType	glm::max (genType const &x, typename genType::value_type const &y)

template<typename genType >
genType	glm::clamp (genType const &x, genType const &minVal, genType const &maxVal)
	Returns min(max(x, minVal), maxVal) for each component in x using the floating-point values minVal and maxVal. More...

template<typename genType >
genType	glm::clamp (genType const &x, typename genType::value_type const &minVal, typename genType::value_type const &maxVal)

template<typename genTypeT , typename genTypeU >
genTypeT	glm::mix (genTypeT const &x, genTypeT const &y, genTypeU const &a)

template<typename genType >
genType	glm::step (genType const &edge, genType const &x)
	Returns 0.0 if x < edge, otherwise it returns 1.0. More...

template<typename genType >
genType	glm::step (typename genType::value_type const &edge, genType const &x)

template<typename genType >
genType	glm::smoothstep (genType const &edge0, genType const &edge1, genType const &x)
	Returns 0.0 if x <= edge0 and 1.0 if x >= edge1 and performs smooth Hermite interpolation between 0 and 1 when edge0 < x < edge1. More...

template<typename genType >
genType	glm::smoothstep (typename genType::value_type const &edge0, typename genType::value_type const &edge1, genType const &x)

template<typename genType >
genType::bool_type	glm::isnan (genType const &x)
	Returns true if x holds a NaN (not a number) representation in the underlying implementation's set of floating point representations. More...

template<typename genType >
genType::bool_type	glm::isinf (genType const &x)
	Returns true if x holds a positive infinity or negative infinity representation in the underlying implementation's set of floating point representations. More...

template<typename genType , typename genIType >
genIType	glm::floatBitsToInt (genType const &value)
	Returns a signed integer value representing the encoding of a floating-point value. More...

template<typename genType , typename genUType >
genUType	glm::floatBitsToUint (genType const &value)
	Returns a unsigned integer value representing the encoding of a floating-point value. More...

template<typename genType , typename genIType >
genType	glm::intBitsToFloat (genIType const &value)
	Returns a floating-point value corresponding to a signed integer encoding of a floating-point value. More...

template<typename genType , typename genUType >
genType	glm::uintBitsToFloat (genUType const &value)
	Returns a floating-point value corresponding to a unsigned integer encoding of a floating-point value. More...

template<typename genType >
genType	glm::fma (genType const &a, genType const &b, genType const &c)
	Computes and returns a * b + c. More...

template<typename genType , typename genIType >
genType	glm::frexp (genType const &x, genIType &exp)
	Splits x into a floating-point significand in the range [0.5, 1.0) and an integral exponent of two, such that: x = significand * exp(2, exponent) More...

template<typename genType , typename genIType >
genType	glm::ldexp (genType const &x, genIType const &exp)
	Builds a floating-point number from x and the corresponding integral exponent of two in exp, returning: significand * exp(2, exponent) More...

Detailed Description

These all operate component-wise.

The description is per component.

Function Documentation

§ abs()

template<typename genType >

genType glm::abs ( genType const & x )

Returns x if x >= 0; otherwise, it returns -x.

Template Parameters

genType floating-point or signed integer; scalar or vector types.

See also: GLSL abs man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ ceil()

template<typename genType >

genType glm::ceil ( genType const & x )

Returns a value equal to the nearest integer that is greater than or equal to x.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL ceil man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ clamp()

template<typename genType >

genType glm::clamp	(	genType const &	x,
		genType const &	minVal,
		genType const &	maxVal
	)

Returns min(max(x, minVal), maxVal) for each component in x using the floating-point values minVal and maxVal.

Template Parameters

genType Floating-point or integer; scalar or vector types.

See also: GLSL clamp man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ floatBitsToInt()

template<typename genType , typename genIType >

genIType glm::floatBitsToInt ( genType const & value )

Returns a signed integer value representing the encoding of a floating-point value.

The floatingpoint value's bit-level representation is preserved.

Template Parameters

genType	Single-precision floating-point scalar or vector types.
genIType	Signed integer scalar or vector types.

See also: GLSL floatBitsToInt man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ floatBitsToUint()

template<typename genType , typename genUType >

genUType glm::floatBitsToUint ( genType const & value )

Returns a unsigned integer value representing the encoding of a floating-point value.

The floatingpoint value's bit-level representation is preserved.

Template Parameters

genType	Single-precision floating-point scalar or vector types.
genUType	Unsigned integer scalar or vector types.

See also: GLSL floatBitsToUint man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ floor()

template<typename genType >

genType glm::floor ( genType const & x )

Returns a value equal to the nearest integer that is less then or equal to x.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL floor man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ fma()

template<typename genType >

genType glm::fma	(	genType const &	a,
		genType const &	b,
		genType const &	c
	)

Computes and returns a * b + c.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL fma man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ fract()

template<typename genType >

genType glm::fract ( genType const & x )

Return x - floor(x).

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL fract man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ frexp()

template<typename genType , typename genIType >

genType glm::frexp	(	genType const &	x,
		genIType &	exp
	)

Splits x into a floating-point significand in the range [0.5, 1.0) and an integral exponent of two, such that: x = significand * exp(2, exponent)

The significand is returned by the function and the exponent is returned in the parameter exp. For a floating-point value of zero, the significant and exponent are both zero. For a floating-point value that is an infinity or is not a number, the results are undefined.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL frexp man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ intBitsToFloat()

template<typename genType , typename genIType >

genType glm::intBitsToFloat ( genIType const & value )

Returns a floating-point value corresponding to a signed integer encoding of a floating-point value.

If an inf or NaN is passed in, it will not signal, and the resulting floating point value is unspecified. Otherwise, the bit-level representation is preserved.

Template Parameters

genType	Single-precision floating-point scalar or vector types.
genIType	Signed integer scalar or vector types.

See also: GLSL intBitsToFloat man page; GLSL 4.20.8 specification, section 8.3 Common Functions

Todo:: Clarify this declaration, we don't need to actually specify the return type

§ isinf()

template<typename genType >

genType::bool_type glm::isinf ( genType const & x )

Returns true if x holds a positive infinity or negative infinity representation in the underlying implementation's set of floating point representations.

Returns false otherwise, including for implementations with no infinity representations.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL isinf man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ isnan()

template<typename genType >

genType::bool_type glm::isnan ( genType const & x )

Returns true if x holds a NaN (not a number) representation in the underlying implementation's set of floating point representations.

Returns false otherwise, including for implementations with no NaN representations.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL isnan man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ ldexp()

template<typename genType , typename genIType >

genType glm::ldexp	(	genType const &	x,
		genIType const &	exp
	)

Builds a floating-point number from x and the corresponding integral exponent of two in exp, returning: significand * exp(2, exponent)

If this product is too large to be represented in the floating-point type, the result is undefined.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL ldexp man page;; GLSL 4.20.8 specification, section 8.3 Common Functions

§ max()

template<typename genType >

genType glm::max	(	genType const &	x,
		genType const &	y
	)

Returns y if x < y; otherwise, it returns x.

Template Parameters

genType Floating-point or integer; scalar or vector types.

See also: GLSL max man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ min()

template<typename genType >

genType glm::min	(	genType const &	x,
		genType const &	y
	)

Returns y if y < x; otherwise, it returns x.

Template Parameters

genType Floating-point or integer; scalar or vector types.

See also: GLSL min man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ mix()

template<typename genTypeT , typename genTypeU >

genTypeT glm::mix	(	genTypeT const &	x,
		genTypeT const &	y,
		genTypeU const &	a
	)

Returns: If genTypeU is a floating scalar or vector: Returns x * (1.0 - a) + y * a, i.e., the linear blend of x and y using the floating-point value a. The value for a is not restricted to the range [0, 1].; If genTypeU is a boolean scalar or vector: Selects which vector each returned component comes from. For a component of a that is false, the corresponding component of x is returned. For a component of a that is true, the corresponding component of y is returned. Components of x and y that are not selected are allowed to be invalid floating point values and will have no effect on the results. Thus, this provides different functionality than genType mix(genType x, genType y, genType(a)) where a is a Boolean vector.

See also: GLSL mix man page; GLSL 4.20.8 specification, section 8.3 Common Functions

Parameters

[in]	x	Value to interpolate.
[in]	y	Value to interpolate.
[in]	a	Interpolant.

Template Parameters

genTypeT	Floating point scalar or vector.
genTypeU	Floating point or boolean scalar or vector. It can't be a vector if it is the length of genTypeT.

#include <glm/glm.hpp>
...
float a;
bool b;
glm::dvec3 e;
glm::dvec3 f;
glm::vec4 g;
glm::vec4 h;
...
glm::vec4 r = glm::mix(g, h, a); // Interpolate with a floating-point scalar two vectors. 
glm::vec4 s = glm::mix(g, h, b); // Teturns g or h;
glm::dvec3 t = glm::mix(e, f, a); // Types of the third parameter is not required to match with the first and the second.
glm::vec4 u = glm::mix(g, h, r); // Interpolations can be perform per component with a vector for the last parameter.

§ mod() [1/2]

template<typename genType >

genType glm::mod	(	genType const &	x,
		genType const &	y
	)

Modulus.

Returns x - y * floor(x / y) for each component in x using the floating point value y.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL mod man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ mod() [2/2]

template<typename genType >

genType glm::mod	(	genType const &	x,
		typename genType::value_type const &	y
	)

Modulus.

Returns x - y * floor(x / y) for each component in x using the floating point value y.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL mod man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ modf()

template<typename genType >

genType glm::modf	(	genType const &	x,
		genType &	i
	)

Returns the fractional part of x and sets i to the integer part (as a whole number floating point value).

Both the return value and the output parameter will have the same sign as x.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL modf man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ round()

template<typename genType >

genType glm::round ( genType const & x )

Returns a value equal to the nearest integer to x.

The fraction 0.5 will round in a direction chosen by the implementation, presumably the direction that is fastest. This includes the possibility that round(x) returns the same value as roundEven(x) for all values of x.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL round man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ roundEven()

template<typename genType >

genType glm::roundEven ( genType const & x )

Returns a value equal to the nearest integer to x.

A fractional part of 0.5 will round toward the nearest even integer. (Both 3.5 and 4.5 for x will return 4.0.)

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL roundEven man page; GLSL 4.20.8 specification, section 8.3 Common Functions; New round to even technique

§ sign()

template<typename genType >

genType glm::sign ( genType const & x )

Returns 1.0 if x > 0, 0.0 if x == 0, or -1.0 if x < 0.

Template Parameters

genType Floating-point or signed integer; scalar or vector types.

See also: GLSL sign man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ smoothstep()

template<typename genType >

genType glm::smoothstep	(	genType const &	edge0,
		genType const &	edge1,
		genType const &	x
	)

Returns 0.0 if x <= edge0 and 1.0 if x >= edge1 and performs smooth Hermite interpolation between 0 and 1 when edge0 < x < edge1.

This is useful in cases where you would want a threshold function with a smooth transition. This is equivalent to: genType t; t = clamp ((x � edge0) / (edge1 � edge0), 0, 1); return t * t * (3 � 2 * t); Results are undefined if edge0 >= edge1.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL smoothstep man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ step()

template<typename genType >

genType glm::step	(	genType const &	edge,
		genType const &	x
	)

Returns 0.0 if x < edge, otherwise it returns 1.0.

See also: GLSL step man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ trunc()

template<typename genType >

genType glm::trunc ( genType const & x )

Returns a value equal to the nearest integer to x whose absolute value is not larger than the absolute value of x.

Template Parameters

genType Floating-point scalar or vector types.

See also: GLSL trunc man page; GLSL 4.20.8 specification, section 8.3 Common Functions

§ uintBitsToFloat()

template<typename genType , typename genUType >

genType glm::uintBitsToFloat ( genUType const & value )

Returns a floating-point value corresponding to a unsigned integer encoding of a floating-point value.

If an inf or NaN is passed in, it will not signal, and the resulting floating point value is unspecified. Otherwise, the bit-level representation is preserved.

Template Parameters

genType	Single-precision floating-point scalar or vector types.
genUType	Unsigned integer scalar or vector types.

See also: GLSL uintBitsToFloat man page; GLSL 4.20.8 specification, section 8.3 Common Functions

Todo:: Clarify this declaration, we don't need to actually specify the return type

Functions

Detailed Description

Function Documentation

§ abs()

§ ceil()

§ clamp()

§ floatBitsToInt()

§ floatBitsToUint()

§ floor()

§ fma()

§ fract()

§ frexp()

§ intBitsToFloat()

§ isinf()

§ isnan()

§ ldexp()

§ max()

§ min()

§ mix()

§ mod() [1/2]

§ mod() [2/2]

§ modf()

§ round()

§ roundEven()

§ sign()

§ smoothstep()

§ step()

§ trunc()

§ uintBitsToFloat()