alex/agb
1
0
Fork 0
mirror of https://github.com/italicsjenga/agb.git synced 2024-12-23 08:11:33 +11:00
Code Issues Packages Projects Releases Wiki Activity

fix cos function

Browse source
This commit is contained in:
Corwin 2023-10-08 14:23:04 +01:00
parent 539caf7ad9
commit 548dd9ff67
No known key found for this signature in database
1 changed files with 3 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
agb-fixnum/src/lib.rs
View file

@ -533,17 +533,10 @@ impl<I: FixedWidthSignedInteger, const N: usize> Num<I, N> {
/// ``` /// ```
#[must_use] #[must_use]
pub fn cos(self) -> Self { pub fn cos(self) -> Self {
let one: Self = I::one().into();
let mut x = self; let mut x = self;
let four: I = 4.into(); x -= num!(0.25) + (x + num!(0.25)).floor();
let two: I = 2.into(); x *= (x.abs() - num!(0.5)) * num!(16.);
let sixteen: I = 16.into(); x += x * (x.abs() - num!(1.)) * num!(0.225);
let nine: I = 9.into();
let forty: I = 40.into();
x -= one / four + (x + one / four).floor();
x *= (x.abs() - one / two) * sixteen;
x += x * (x.abs() - one) * (nine / forty);
x x
} }