18 #include "../common.hpp"    19 #include "../exponential.hpp"    20 #include "../geometric.hpp"    22 #ifndef GLM_ENABLE_EXPERIMENTAL    23 #   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."    26 #if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)    27 #   pragma message("GLM: GLM_GTX_fast_square_root extension included")    38     template<
typename genType>
    39     GLM_FUNC_DECL genType 
fastSqrt(genType x);
    44     template<length_t L, 
typename T, qualifier Q>
    45     GLM_FUNC_DECL vec<L, T, Q> 
fastSqrt(vec<L, T, Q> 
const& x);
    50     template<
typename genType>
    56     template<length_t L, 
typename T, qualifier Q>
    62     template<
typename genType>
    68     template<length_t L, 
typename T, qualifier Q>
    69     GLM_FUNC_DECL T 
fastLength(vec<L, T, Q> 
const& x);
    74     template<
typename genType>
    75     GLM_FUNC_DECL genType 
fastDistance(genType x, genType y);
    80     template<length_t L, 
typename T, qualifier Q>
    81     GLM_FUNC_DECL T 
fastDistance(vec<L, T, Q> 
const& x, vec<L, T, Q> 
const& y);
    86     template<
typename genType>
    92 #include "fast_square_root.inl" GLM_FUNC_DECL vec< L, T, Q > fastInverseSqrt(vec< L, T, Q > const &x)
Faster than the common inversesqrt function but less accurate. 
GLM_FUNC_DECL vec< L, T, Q > fastSqrt(vec< L, T, Q > const &x)
Faster than the common sqrt function but less accurate. 
GLM_FUNC_DECL T fastLength(vec< L, T, Q > const &x)
Faster than the common length function but less accurate. 
GLM_FUNC_DECL genType fastNormalize(genType const &x)
Faster than the common normalize function but less accurate. 
GLM_FUNC_DECL T fastDistance(vec< L, T, Q > const &x, vec< L, T, Q > const &y)
Faster than the common distance function but less accurate.