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|
use crate::{
app::App,
diff::Differ,
export::Exporter,
paint::{PaintUniforms, Painter},
};
use log::{debug, info, warn};
use rand::Rng;
use std::sync::Arc;
use wgpu::{Extent3d, Texture, TextureUsages};
#[allow(unused)]
pub struct Approximator {
app: Arc<App>,
size: Extent3d,
differ: Differ,
painter: Painter,
exporter: Exporter,
tex_approx: Texture,
tex_savestate: Texture,
tex_target: Texture,
}
impl Approximator {
pub fn new(app: &Arc<App>, tex_target: Texture, size: Extent3d) -> Self {
let App { device, .. } = app.as_ref();
let tex_approx = device.create_texture(&wgpu::TextureDescriptor {
size,
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Rgba8Unorm,
usage: TextureUsages::COPY_DST
| TextureUsages::TEXTURE_BINDING
| TextureUsages::STORAGE_BINDING
| TextureUsages::COPY_SRC,
label: None,
});
let tex_savestate = device.create_texture(&wgpu::TextureDescriptor {
size,
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: wgpu::TextureFormat::Rgba8Unorm,
usage: TextureUsages::COPY_DST | TextureUsages::COPY_SRC,
label: None,
});
// let initial_init = (0..)
// write_texture(queue, &tex_approx, initial_init, size);
let differ = Differ::new(&app, size, &tex_approx, &tex_target);
let painter = Painter::new(&app, size, &tex_approx);
let exporter = Exporter::new(&app, size);
Approximator {
app: app.clone(),
size,
differ,
tex_savestate,
tex_approx,
tex_target,
painter,
exporter,
}
}
pub fn save(&self) {
self.app
.copy_texture(&self.tex_approx, &self.tex_savestate, self.size);
}
pub fn restore(&self) {
self.app
.copy_texture(&self.tex_savestate, &self.tex_approx, self.size);
}
pub async fn run(&mut self, iters: usize, out: &str) -> Vec<PaintUniforms> {
let rscale = self.size.width as f32 * 0.1;
let mut objects = vec![];
for i in 0..iters {
let mut p = PaintUniforms {
x: rand::thread_rng().gen_range(0.0..self.size.width as f32),
y: rand::thread_rng().gen_range(0.0..self.size.height as f32),
rx: rscale,
ry: rscale,
r: rand::thread_rng().gen_range(0.0..1.0),
g: rand::thread_rng().gen_range(0.0..1.0),
b: rand::thread_rng().gen_range(0.0..1.0),
};
// Find initial diff
self.save();
self.painter.run(p);
let initial_diff = pollster::block_on(self.differ.run());
debug!("initial diff={initial_diff}");
self.restore();
let mut cd = initial_diff;
self.save();
let ok = loop {
let mut q = 0;
let mut k = |k: usize| {
q += k;
q == 0
};
if k(self.optimize_param(&mut cd, &mut p, "more red", |p| p.r += 0.1)) {
k(self.optimize_param(&mut cd, &mut p, "less red", |p| p.r -= 0.1));
}
if k(self.optimize_param(&mut cd, &mut p, "more green", |p| p.g += 0.1)) {
k(self.optimize_param(&mut cd, &mut p, "less green", |p| p.g -= 0.1));
}
if k(self.optimize_param(&mut cd, &mut p, "more blue", |p| p.b += 0.1)) {
k(self.optimize_param(&mut cd, &mut p, "less blue", |p| p.b -= 0.1));
}
if k(self.optimize_param(&mut cd, &mut p, "increase rx", |p| p.rx *= 1.5)) {
k(self.optimize_param(&mut cd, &mut p, "decrease rx", |p| p.rx /= 1.5));
}
if k(self.optimize_param(&mut cd, &mut p, "increase ry", |p| p.ry *= 1.5)) {
k(self.optimize_param(&mut cd, &mut p, "decrease ry", |p| p.ry /= 1.5));
}
if k(self.optimize_param(&mut cd, &mut p, "move right", |p| p.x += 8.0)) {
k(self.optimize_param(&mut cd, &mut p, "move left", |p| p.x -= 8.0));
}
if k(self.optimize_param(&mut cd, &mut p, "move down", |p| p.y += 8.0)) {
k(self.optimize_param(&mut cd, &mut p, "move up", |p| p.y -= 8.0));
}
if p.rx < 5.0 || p.ry < 5.0 {
break false;
}
if q == 0 {
break true;
}
};
if ok {
self.painter.run(p);
info!("{i} (improvement={})", initial_diff - cd);
objects.push(p);
} else {
warn!("object aborted");
}
}
self.exporter.run(&self.tex_approx, out).await;
return objects;
}
pub fn optimize_param<F>(
&self,
current_diff: &mut u32,
params: &mut PaintUniforms,
label: &'static str,
f: F,
) -> usize
where
F: Fn(&mut PaintUniforms) -> (),
{
let mut p = params.clone();
let mut i = 0;
loop {
f(&mut p);
self.painter.run(p);
let diff = pollster::block_on(self.differ.run());
// pollster::block_on(self.exporter.run(&self.tex_approx, &format!("a/snap.png")));
debug!("try {label:?} ({})", diff as i64 - *current_diff as i64);
self.restore();
if diff >= *current_diff {
break i;
}
debug!("applied {label:?}");
i += 1;
*current_diff = diff;
*params = p
}
}
}
|
