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c++ Programming Glossary: acos

C++ (and maths) : fast approximation of a trigonometric function

http://stackoverflow.com/questions/11261170/c-and-maths-fast-approximation-of-a-trigonometric-function

basically looking for a fast approximation of the function acos in C I'd like to know if I can significantly beat the standard.. expression many times with different parameters sin acos t_1 acos t_2 ... acos t_n where the t_i are known real double.. many times with different parameters sin acos t_1 acos t_2 ... acos t_n where the t_i are known real double numbers..

cmath functions generating compiler error

http://stackoverflow.com/questions/1216878/cmath-functions-generating-compiler-error

to access the functions in the cmath header. Such as error acos has not been declared. This goes on for pretty much every function.. abs long double __x return __builtin_fabsl __x using acos ERROR HERE inline float acos float __x return __builtin_acosf.. __builtin_fabsl __x using acos ERROR HERE inline float acos float __x return __builtin_acosf __x inline long double acos..

Quaternion - Rotate To

http://stackoverflow.com/questions/13014973/quaternion-rotate-to

found by taking the inverse cosine of their dot product acos dotProduct z normalize p c Unfortunately this is a measure of..

Edges on polygon outlines not always correct

http://stackoverflow.com/questions/3039026/edges-on-polygon-outlines-not-always-correct

if dot 1.0f dot 1.0f if dot 1.0f dot 1.0f float theta_0 acos dot float theta theta_0 t POINTFLOAT v2 v2.x v0.y v2.y v0.x.. v1 if dot 1.0f dot 1.0f if dot 1.0f dot 1.0f float theta_0 acos dot float theta theta_0 t Vector2f v2 v0.y v0.x return v0 cos..

Fast Arc Cos algorithm?

http://stackoverflow.com/questions/3380628/fast-arc-cos-algorithm

x return sine x pi 2 But now when I profile I see that acos is killing the processor. I don't need instense precision. What.. need instense precision. What is a fast way to calculate acos x Thanks. c c algorithm math performance share improve this.. the Lagrange polynomial for x 1 ½ 0 ½ 1 is double acos x return 0.69813170079773212 x x 0.87266462599716477 x 1.5707963267948966..