3rdparty/glm/doc/api/a00148.html
| | 0.9.8 |
Geometric functions GLM Core
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| | 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 T , precision P, template< typename, precision > class vecType> | | GLM_FUNC_DECL vecType< T, P > | faceforward (vecType< T, P > const &N, vecType< T, P > const &I, vecType< T, P > 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) | | |
These operate on vectors as vectors, not component-wise.
| 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 alsoGLSL cross man page GLSL 4.20.8 specification, section 8.5 Geometric Functions
| GLM_FUNC_DECL T glm::distance | ( | vecType< T, P > const & | p0, | | | | vecType< T, P > const & | p1 | | | ) | | |
Returns the distance betwwen p0 and p1, i.e., length(p0 - p1).
Template Parameters
| genType | Floating-point vector types. |
See alsoGLSL distance man page GLSL 4.20.8 specification, section 8.5 Geometric Functions
| GLM_FUNC_DECL T glm::dot | ( | vecType< T, P > const & | x, | | | | vecType< T, P > const & | y | | | ) | | |
Returns the dot product of x and y, i.e., result = x * y.
Template Parameters
| genType | Floating-point vector types. |
See alsoGLSL dot man page GLSL 4.20.8 specification, section 8.5 Geometric Functions
| GLM_FUNC_DECL vecType<T, P> glm::faceforward | ( | vecType< T, P > const & | N, | | | | vecType< T, P > const & | I, | | | | vecType< T, P > const & | Nref | | | ) | | |
If dot(Nref, I) < 0.0, return N, otherwise, return -N.
Template Parameters
| genType | Floating-point vector types. |
See alsoGLSL 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 alsoGLSL 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 alsoGLSL 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 alsoGLSL 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 alsoGLSL refract man page GLSL 4.20.8 specification, section 8.5 Geometric Functions
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