CS计算机代考程序代写 ///////////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
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/// @ref core
/// @file glm/detail/func_geometric.hpp
/// @date 2008-08-03 / 2011-06-14
/// @author Christophe Riccio
///
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
///
/// @defgroup core_func_geometric Geometric functions
/// @ingroup core
///
/// These operate on vectors as vectors, not component-wise.
///////////////////////////////////////////////////////////////////////////////////

#pragma once

#include “type_vec3.hpp”

namespace glm
{
/// @addtogroup core_func_geometric
/// @{

/// Returns the length of x, i.e., sqrt(x * x).
///
/// @tparam genType Floating-point vector types.
///
/// @see GLSL length man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template class vecType>
GLM_FUNC_DECL T length(
vecType const & x);

/// Returns the distance betwwen p0 and p1, i.e., length(p0 – p1).
///
/// @tparam genType Floating-point vector types.
///
/// @see GLSL distance man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template class vecType>
GLM_FUNC_DECL T distance(
vecType const & p0,
vecType const & p1);

/// Returns the dot product of x and y, i.e., result = x * y.
///
/// @tparam genType Floating-point vector types.
///
/// @see GLSL dot man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template class vecType>
GLM_FUNC_DECL T dot(
vecType const & x,
vecType const & y);

/// Returns the cross product of x and y.
///
/// @tparam valType Floating-point scalar types.
///
/// @see GLSL cross man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template
GLM_FUNC_DECL tvec3 cross(
tvec3 const & x,
tvec3 const & y);

/// 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 GLSL normalize man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template class vecType>
GLM_FUNC_DECL vecType normalize(
vecType const & x);

/// If dot(Nref, I) < 0.0, return N, otherwise, return -N. /// /// @tparam genType Floating-point vector types. /// /// @see GLSL faceforward man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template class vecType>
GLM_FUNC_DECL vecType faceforward(
vecType const & N,
vecType const & I,
vecType const & Nref);

/// For the incident vector I and surface orientation N,
/// returns the reflection direction : result = I – 2.0 * dot(N, I) * N.
///
/// @tparam genType Floating-point vector types.
///
/// @see GLSL reflect man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template
GLM_FUNC_DECL genType reflect(
genType const & I,
genType const & N);

/// For the incident vector I and surface normal N,
/// and the ratio of indices of refraction eta,
/// return the refraction vector.
///
/// @tparam genType Floating-point vector types.
///
/// @see GLSL refract man page
/// @see GLSL 4.20.8 specification, section 8.5 Geometric Functions
template class vecType>
GLM_FUNC_DECL vecType refract(
vecType const & I,
vecType const & N,
T eta);

/// @}
}//namespace glm

#include “func_geometric.inl”