93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/// @ref gtx_fast_square_root
|
|
/// @file glm/gtx/fast_square_root.hpp
|
|
///
|
|
/// @see core (dependence)
|
|
///
|
|
/// @defgroup gtx_fast_square_root GLM_GTX_fast_square_root
|
|
/// @ingroup gtx
|
|
///
|
|
/// Include <glm/gtx/fast_square_root.hpp> to use the features of this extension.
|
|
///
|
|
/// Fast but less accurate implementations of square root based functions.
|
|
/// - Sqrt optimisation based on Newton's method,
|
|
/// www.gamedev.net/community/forums/topic.asp?topic id=139956
|
|
|
|
#pragma once
|
|
|
|
// Dependency:
|
|
#include "../common.hpp"
|
|
#include "../exponential.hpp"
|
|
#include "../geometric.hpp"
|
|
|
|
#ifndef GLM_ENABLE_EXPERIMENTAL
|
|
# error "GLM: GLM_GTX_fast_square_root is an experimental extension and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."
|
|
#endif
|
|
|
|
#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
|
|
# pragma message("GLM: GLM_GTX_fast_square_root extension included")
|
|
#endif
|
|
|
|
namespace glm
|
|
{
|
|
/// @addtogroup gtx_fast_square_root
|
|
/// @{
|
|
|
|
/// Faster than the common sqrt function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<typename genType>
|
|
GLM_FUNC_DECL genType fastSqrt(genType x);
|
|
|
|
/// Faster than the common sqrt function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<length_t L, typename T, qualifier Q>
|
|
GLM_FUNC_DECL vec<L, T, Q> fastSqrt(vec<L, T, Q> const& x);
|
|
|
|
/// Faster than the common inversesqrt function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<typename genType>
|
|
GLM_FUNC_DECL genType fastInverseSqrt(genType x);
|
|
|
|
/// Faster than the common inversesqrt function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<length_t L, typename T, qualifier Q>
|
|
GLM_FUNC_DECL vec<L, T, Q> fastInverseSqrt(vec<L, T, Q> const& x);
|
|
|
|
/// Faster than the common length function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<typename genType>
|
|
GLM_FUNC_DECL genType fastLength(genType x);
|
|
|
|
/// Faster than the common length function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<length_t L, typename T, qualifier Q>
|
|
GLM_FUNC_DECL T fastLength(vec<L, T, Q> const& x);
|
|
|
|
/// Faster than the common distance function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<typename genType>
|
|
GLM_FUNC_DECL genType fastDistance(genType x, genType y);
|
|
|
|
/// Faster than the common distance function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<length_t L, typename T, qualifier Q>
|
|
GLM_FUNC_DECL T fastDistance(vec<L, T, Q> const& x, vec<L, T, Q> const& y);
|
|
|
|
/// Faster than the common normalize function but less accurate.
|
|
///
|
|
/// @see gtx_fast_square_root extension.
|
|
template<typename genType>
|
|
GLM_FUNC_DECL genType fastNormalize(genType const& x);
|
|
|
|
/// @}
|
|
}// namespace glm
|
|
|
|
#include "fast_square_root.inl"
|