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remove unused math.rs

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Simon Gardling 2021-04-01 11:25:05 -04:00
parent 4864ccae75
commit 930432aefe
2 changed files with 0 additions and 41 deletions
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1
src/lib.rs
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@ -1,7 +1,6 @@
mod blur;
mod grid;
mod imgdata; // for storing image data
mod math;
pub mod model;
mod palette;
mod util; // for math things

40
src/math.rs
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@ -1,40 +0,0 @@
// Previously from trig.rs
// From https://bits.stephan-brumme.com/absFloat.html
#[allow(dead_code)]
#[inline]
fn abs(x: f32) -> f32 {
f32::from_bits(x.to_bits() & 0x7FFF_FFFF)
}
// Previously from trig.rs
// Branchless floor implementation
#[allow(dead_code)]
#[inline]
fn floor(x: f32) -> f32 {
let mut x_trunc = (x as i32) as f32;
x_trunc -= (x < x_trunc) as i32 as f32;
x_trunc
}
// Previously from trig.rs
// Approximates `cos(x)` in radians with the maximum error of `0.002`
// https://stackoverflow.com/posts/28050328/revisions
#[allow(dead_code)]
#[inline]
pub fn cos(mut x: f32) -> f32 {
const ALPHA: f32 = 0.5 * std::f32::consts::FRAC_1_PI;
x *= ALPHA;
x -= 0.25_f32 + floor(x + 0.25_f32);
x *= 16.0_f32 * (abs(x) - 0.5_f32);
x += 0.225_f32 * x * (abs(x) - 1.0_f32);
x
}
// Previously from trig.rs
// Approximates `sin(x)` in radians with the maximum error of `0.002`
#[allow(dead_code)]
#[inline]
pub fn sin(x: f32) -> f32 {
cos(x - std::f32::consts::FRAC_PI_2)
}