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math: cleanup math.v, document math.aprox_cos and math.aprox_sin

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Delyan Angelov 2021-02-27 11:18:26 +02:00
parent a1244a9f5f
commit efca21e988
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1 changed files with 2 additions and 9 deletions
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11
vlib/math/math.v
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@ -3,15 +3,7 @@
// that can be found in the LICENSE file.
module math
// NOTE
// When adding a new function, please make sure it's in the right place.
// All functions are sorted alphabetically, separated by wrapped functions vs
// backend specific functions.
// If using System/Backend dependent functions, put them in their respective
// .c.v or .js.v or other files
// Below are functions that are not wrappers for built-in system functions, but
// native V functions. They are still sorted alphabetically
// Faster approximate sin() and cos() implemented from lolremez
// aprox_sin returns an approximation of sin(a) made using lolremez
pub fn aprox_sin(a f64) f64 {
a0 := 1.91059300966915117e-31
a1 := 1.00086760103908896
@ -24,6 +16,7 @@ pub fn aprox_sin(a f64) f64 {
return a0 + a * (a1 + a * (a2 + a * (a3 + a * (a4 + a * (a5 + a * (a6 + a * a7))))))
}
// aprox_cos returns an approximation of sin(a) made using lolremez
pub fn aprox_cos(a f64) f64 {
a0 := 9.9995999154986614e-1
a1 := 1.2548995793001028e-3