GLM
0.9.5

Functions  
template<typename T >  
T  fastAcos (const T &angle) 
template<typename T >  
T  fastAsin (const T &angle) 
template<typename T >  
T  fastAtan (const T &y, const T &x) 
template<typename T >  
T  fastAtan (const T &angle) 
template<typename T >  
T  fastCos (const T &angle) 
template<typename T >  
T  fastSin (const T &angle) 
template<typename T >  
T  fastTan (const T &angle) 
Fast but less accurate implementations of trigonometric functions.
<glm/gtx/fast_trigonometry.hpp> need to be included to use these functionalities.
T glm::fastAcos  (  const T &  angle  ) 
Faster than the common acos function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.
T glm::fastAsin  (  const T &  angle  ) 
Faster than the common asin function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.
T glm::fastAtan  (  const T &  y, 
const T &  x  
) 
Faster than the common atan function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.
T glm::fastAtan  (  const T &  angle  ) 
Faster than the common atan function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.
T glm::fastCos  (  const T &  angle  ) 
Faster than the common cos function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.
T glm::fastSin  (  const T &  angle  ) 
Faster than the common sin function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.
T glm::fastTan  (  const T &  angle  ) 
Faster than the common tan function but less accurate.
Defined between 2pi and 2pi. From GLM_GTX_fast_trigonometry extension.