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|
mod camera;
mod display;
mod hittable;
mod material;
mod ray;
mod scenes;
mod texture;
mod util;
mod vec3;
use std::{
sync::{mpsc, Arc},
thread,
};
use camera::Camera;
use display::{Display, Image, Pixelflut};
use hittable::Hittable;
use ray::Ray;
use scenes::get_scene;
use vec3::{Color, Vec3};
struct PixelUpdate {
color: Color,
x: usize,
y: usize,
}
fn ray_color(ray: &Ray, background: &Color, world: &dyn Hittable, depth: u32) -> Color {
if depth <= 0 {
return Color {
x: 0.0,
y: 0.0,
z: 0.0,
};
}
match world.hit(ray, 0.001, f64::INFINITY) {
None => background.clone(),
Some(rec) => {
let mut scattered = Ray::new();
let mut attenuation = Color::new();
if let Some(material) = &rec.material {
let emitted = material.emitted(rec.u, rec.v, &rec.p);
if !material.scatter(&ray, &rec, &mut attenuation, &mut scattered) {
emitted
} else {
emitted + attenuation * ray_color(&scattered, background, world, depth - 1)
}
} else {
Color {
x: 0.0,
y: 0.0,
z: 0.0,
}
}
}
}
}
fn render(
image_width: u32,
image_height: u32,
samples_per_pixel: u32,
max_depth: u32,
world: Arc<dyn Hittable>,
background: Color,
camera: Arc<Camera>,
tx: mpsc::Sender<PixelUpdate>,
) {
for j in (0..image_height).rev() {
for i in 0..image_width {
for _ in 0..samples_per_pixel {
let u = ((i as f64) + rand::random::<f64>()) / ((image_width - 1) as f64);
let v = ((j as f64) + rand::random::<f64>()) / ((image_height - 1) as f64);
let ray = camera.get_ray(u, v);
tx.send(PixelUpdate {
color: ray_color(&ray, &background, world.as_ref(), max_depth),
x: i as usize,
y: j as usize,
})
.unwrap();
}
}
}
}
fn main() {
// Image
const ASPECT_RATIO: f64 = 16.0 / 9.0;
//const ASPECT_RATIO: f64 = 1.0;
const IMAGE_WIDTH: u32 = 600;
const IMAGE_HEIGHT: u32 = (IMAGE_WIDTH as f64 / ASPECT_RATIO) as u32;
const SAMPLES_PER_PIXEL: u32 = 30;
const MAX_DEPTH: u32 = 50;
const THREAD_COUNT: u32 = 8;
const TIME_START: f64 = 0.0;
const TIME_END: f64 = 1.0;
// World
let (world, lookfrom, lookat, vfov, aperture, background) = get_scene(
std::env::args()
.nth(1)
.unwrap_or("0".to_string())
.trim()
.parse()
.unwrap_or(0),
);
// Camera
let vup = Vec3 {
x: 0.0,
y: 1.0,
z: 0.0,
};
let dist_to_focus = 10.0;
let cam = Arc::new(Camera::new(
lookfrom,
lookat,
vup,
vfov,
ASPECT_RATIO,
aperture,
dist_to_focus,
TIME_START,
TIME_END,
));
// Render
// let mut final_image = Image::new(IMAGE_WIDTH as usize, IMAGE_HEIGHT as usize);
let mut final_image = Pixelflut::new(
"192.168.0.38:1337",
0,
0,
IMAGE_WIDTH as usize,
IMAGE_HEIGHT as usize,
);
let (tx, rx) = mpsc::channel::<PixelUpdate>();
for _ in 0..THREAD_COUNT {
let sender = tx.clone();
let world_ref = world.clone();
let camera_ref = cam.clone();
let background_clone = background.clone();
thread::spawn(|| {
render(
IMAGE_WIDTH,
IMAGE_HEIGHT,
SAMPLES_PER_PIXEL / THREAD_COUNT,
MAX_DEPTH,
world_ref,
background_clone,
camera_ref,
sender,
);
});
}
let expected_updates: u64 = (SAMPLES_PER_PIXEL / THREAD_COUNT) as u64
* THREAD_COUNT as u64
* IMAGE_HEIGHT as u64
* IMAGE_WIDTH as u64;
let print_frequency: u64 =
(SAMPLES_PER_PIXEL / THREAD_COUNT) as u64 * THREAD_COUNT as u64 * IMAGE_WIDTH as u64;
let print_frequency = print_frequency * 3;
let mut update_count: u64 = 0;
loop {
if let Ok(update) = rx.try_recv() {
update_count += 1;
final_image.add_sample(update.x, update.y, update.color);
if update_count % print_frequency == 0 {
final_image.maybe_update();
eprint!(
"\rCurrent completion: {:.2}%",
(update_count as f64 / expected_updates as f64) * 100.0
)
}
} else {
if Arc::strong_count(&world) == 1 {
break;
}
}
}
final_image.maybe_update();
final_image.maybe_write(&mut std::io::stdout());
eprintln!("\nDone.");
}
|