115 lines
3.5 KiB
Rust
115 lines
3.5 KiB
Rust
use std::time::Instant;
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use anyhow::Result;
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use structopt::StructOpt;
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use rtchallenge::{
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camera::{Camera, RenderStrategy},
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float::consts::PI,
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lights::PointLight,
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materials::Material,
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matrices::Matrix4x4,
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shapes::Shape,
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transformations::view_transform,
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tuples::{Color, Tuple},
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world::World,
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WHITE,
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};
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/// End of chapter 9 challenge.
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#[derive(StructOpt, Debug)]
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#[structopt(name = "eoc9")]
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struct Opt {
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/// Strategy for casting rays into image.
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#[structopt(long, default_value = "rayon")]
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render_strategy: RenderStrategy,
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/// Number of samples per pixel. 0 renders from the center of the pixel, 1 or more samples N
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/// times randomly across the pixel.
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#[structopt(short, long, default_value = "0")]
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samples: usize,
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/// Rendered image width in pixels.
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#[structopt(short, long, default_value = "2560")]
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width: usize,
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/// Rendered image height in pixels.
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#[structopt(short, long, default_value = "1440")]
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height: usize,
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}
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fn main() -> Result<()> {
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let start = Instant::now();
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let opt = Opt::from_args();
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let light_position = Tuple::point(-5., 5., -5.);
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let light_color = WHITE;
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let light1 = PointLight::new(light_position, light_color);
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let light_position = Tuple::point(5., 5., -5.);
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let light_color = Color::new(0.2, 0.2, 0.6);
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let light2 = PointLight::new(light_position, light_color);
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let light_position = Tuple::point(0., 2., -5.);
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let light_color = Color::new(0.2, 0.2, 0.1);
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let light3 = PointLight::new(light_position, light_color);
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let mut camera = Camera::new(opt.width, opt.height, PI / 4.);
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let from = Tuple::point(0., 1.5, -5.);
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let to = Tuple::point(0., 1., 0.);
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let up = Tuple::point(0., 1., 0.);
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camera.set_transform(view_transform(from, to, up));
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camera.render_strategy = opt.render_strategy;
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camera.samples_per_pixel = opt.samples;
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let mut floor = Shape::plane();
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floor.material = Material {
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color: Color::new(1., 0.2, 0.2),
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specular: 0.,
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..Material::default()
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};
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let mut ceiling = Shape::plane();
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ceiling.set_transform(Matrix4x4::translation(0., 6., 0.) * Matrix4x4::rotation_x(PI));
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ceiling.material = Material {
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color: Color::new(0.6, 0.6, 0.8),
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specular: 0.2,
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..Material::default()
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};
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let mut middle = Shape::sphere();
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middle.set_transform(Matrix4x4::translation(-0.5, 0.5, 0.5));
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middle.material = Material {
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color: Color::new(0.1, 1., 0.5),
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diffuse: 0.7,
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specular: 0.3,
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..Material::default()
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};
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let mut right = Shape::sphere();
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right.set_transform(Matrix4x4::translation(1.5, 0.5, -0.5) * Matrix4x4::scaling(0.5, 0.5, 0.5));
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right.material = Material {
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color: Color::new(1., 1., 1.),
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diffuse: 0.7,
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specular: 0.0,
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..Material::default()
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};
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let mut left = Shape::sphere();
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left.set_transform(
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Matrix4x4::translation(-1.5, 0.33, -0.75) * Matrix4x4::scaling(0.33, 0.33, 0.33),
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);
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left.material = Material {
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color: Color::new(1., 0.8, 0.1),
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diffuse: 0.7,
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specular: 0.3,
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..Material::default()
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};
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let mut world = World::default();
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world.lights = vec![light1, light2, light3];
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world.objects = vec![floor, ceiling, middle, right, left];
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let image = camera.render(&world);
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let path = "/tmp/eoc9.png";
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println!("saving output to {}", path);
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image.write_to_file(path)?;
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println!("Render time {:.3} seconds", start.elapsed().as_secs_f32());
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Ok(())
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}
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