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Move probabilities into palettes

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This commit is contained in:
Juergen Stuber 2023-12-28 20:03:42 +01:00
parent 22bacb9485
commit 2088e27f87
1 changed files with 25 additions and 18 deletions
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43
src/bin/cnoise/main.rs
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@ -5,7 +5,6 @@ use std::iter::repeat_with;
use std::thread::sleep;
use std::time::Duration;
use rand::seq::SliceRandom;
use rand::thread_rng;
use rand::Rng;
@ -23,19 +22,21 @@ fn send<T: Write>(w: &mut T, f: &Frame) -> std::io::Result<()> {
}
#[derive(Clone, Debug)]
struct Palette(Vec<(Color, Color)>);
struct Palette(Vec<(f64, Color, Color)>);
impl Palette {
fn pick<R>(&self, rng: &mut R, p: f64) -> Color
fn pick<R>(&self, rng: &mut R) -> Color
where
R: Rng,
{
let &(c0, c1) = self.0.choose(rng).unwrap();
if rng.gen::<f64>() < p {
c0.interpolate(c1, rng.gen::<f64>().powf(2.0))
} else {
Color::black()
let r = rng.gen::<f64>();
let mut p_sum = 0.0;
for &(p, c0, c1) in &self.0 {
p_sum += p;
if r < p_sum {
return c0.interpolate(c1, rng.gen::<f64>().powf(2.0));
}
}
Color::black()
}
}
@ -55,23 +56,29 @@ fn main() -> std::io::Result<()> {
let mut rng = thread_rng();
let palette_35 = Palette(vec![(Color::new(0, 138, 170), Color::new(0, 160, 95))]);
let palette_35 = Palette(vec![(0.3, Color::new(0, 138, 170), Color::new(0, 160, 95))]);
let palette_36 = Palette(vec![
(0.1, Color::new(208, 208, 206), Color::new(208, 208, 206)),
(0.05, Color::new(254, 80, 0), Color::new(254, 80, 0)),
(0.05, Color::new(0, 187, 49), Color::new(0, 187, 49)),
]);
let palette_37 = Palette(vec![
(Color::new(153, 0, 0), Color::new(255, 0, 0)),
(Color::new(0, 153, 0), Color::new(0, 255, 0)),
(Color::new(0, 0, 153), Color::new(0, 0, 255)),
(Color::new(153, 153, 0), Color::new(255, 255, 0)),
(Color::new(0, 153, 153), Color::new(0, 255, 255)),
(Color::new(153, 0, 153), Color::new(255, 0, 255)),
(0.05, Color::new(255, 0, 0), Color::new(255, 0, 0)),
(0.05, Color::new(0, 255, 0), Color::new(0, 255, 0)),
(0.05, Color::new(0, 0, 255), Color::new(0, 0, 255)),
(0.02, Color::new(255, 255, 0), Color::new(255, 255, 0)),
(0.02, Color::new(0, 255, 255), Color::new(0, 255, 255)),
(0.02, Color::new(255, 0, 255), Color::new(255, 0, 255)),
]);
let palette = match arg {
35 => palette_35,
36 => palette_36,
_ => palette_37,
};
let mut frame = repeat_with(|| {
repeat_with(|| palette.pick(&mut rng, 0.5))
repeat_with(|| palette.pick(&mut rng))
.take(x_size)
.collect::<Vec<_>>()
})
@ -80,7 +87,7 @@ fn main() -> std::io::Result<()> {
loop {
let x = rng.gen_range(0..x_size);
let y = rng.gen_range(0..y_size);
let c = palette.pick(&mut rng, 0.5);
let c = palette.pick(&mut rng);
frame[y][x] = c;
let mut buf = Vec::with_capacity(x_size * y_size * 3);