Functions
template<typename T , precision P>
GLM_FUNC_DECL tvec3< T, P >	cross (tvec3< T, P > const &x, tvec3< T, P > const &y)

template<typename T , precision P, template< typename, precision > class vecType>
GLM_FUNC_DECL T	distance (vecType< T, P > const &p0, vecType< T, P > const &p1)

template<typename T , precision P, template< typename, precision > class vecType>
GLM_FUNC_DECL T	dot (vecType< T, P > const &x, vecType< T, P > const &y)

template<typename genType >
GLM_FUNC_DECL genType	faceforward (genType const &N, genType const &I, genType const &Nref)

template<typename T , precision P, template< typename, precision > class vecType>
GLM_FUNC_DECL T	length (vecType< T, P > const &x)

template<typename T , precision P, template< typename, precision > class vecType>
GLM_FUNC_DECL vecType< T, P >	normalize (vecType< T, P > const &x)

template<typename genType >
GLM_FUNC_DECL genType	reflect (genType const &I, genType const &N)

template<typename T , precision P, template< typename, precision > class vecType>
GLM_FUNC_DECL vecType< T, P >	refract (vecType< T, P > const &I, vecType< T, P > const &N, T eta)

Detailed Description

These operate on vectors as vectors, not component-wise.

Function Documentation

GLM_FUNC_DECL tvec3<T, P> glm::cross	(	tvec3< T, P > const &	x,
		tvec3< T, P > const &	y
	)

Returns the cross product of x and y.

Template Parameters

valType Floating-point scalar types.

See also: GLSL cross man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

Returns the distance betwwen p0 and p1, i.e., length(p0 - p1).

Template Parameters

genType Floating-point vector types.

See also: GLSL distance man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

Returns the dot product of x and y, i.e., result = x * y.

Template Parameters

genType Floating-point vector types.

See also: GLSL dot man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

GLM_FUNC_DECL genType glm::faceforward	(	genType const &	N,
		genType const &	I,
		genType const &	Nref
	)

If dot(Nref, I) < 0.0, return N, otherwise, return -N.

Template Parameters

genType Floating-point vector types.

See also: GLSL faceforward man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

GLM_FUNC_DECL T glm::length ( vecType< T, P > const & x )

Returns the length of x, i.e., sqrt(x * x).

Template Parameters

genType Floating-point vector types.

See also: GLSL length man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

GLM_FUNC_DECL vecType<T, P> glm::normalize ( vecType< T, P > const & x )

Returns a vector in the same direction as x but with length of 1.

According to issue 10 GLSL 1.10 specification, if length(x) == 0 then result is undefined and generate an error.

See also: GLSL normalize man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

GLM_FUNC_DECL genType glm::reflect	(	genType const &	I,
		genType const &	N
	)

For the incident vector I and surface orientation N, returns the reflection direction : result = I - 2.0 * dot(N, I) * N.

Template Parameters

genType Floating-point vector types.

See also: GLSL reflect man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions

GLM_FUNC_DECL vecType<T, P> glm::refract	(	vecType< T, P > const &	I,
		vecType< T, P > const &	N,
		T	eta
	)

For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector.

Template Parameters

genType Floating-point vector types.

See also: GLSL refract man page; GLSL 4.20.8 specification, section 8.5 Geometric Functions