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.envrc
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.envrc
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use flake
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.gitignore
vendored
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1
.gitignore
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.direnv
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3
assignment-0/.gitignore
vendored
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assignment-0/.gitignore
vendored
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/target
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out.ppm
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390
assignment-0/Cargo.lock
generated
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390
assignment-0/Cargo.lock
generated
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# This file is automatically @generated by Cargo.
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11
assignment-0/Cargo.toml
Normal file
11
assignment-0/Cargo.toml
Normal file
|
|
@ -0,0 +1,11 @@
|
|||
[package]
|
||||
name = "assignment-0"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.68"
|
||||
clap = { version = "4.1.1", features = ["derive"] }
|
||||
rand = "0.8.5"
|
||||
33
assignment-0/src/main.rs
Normal file
33
assignment-0/src/main.rs
Normal file
|
|
@ -0,0 +1,33 @@
|
|||
use std::{fs::File, path::PathBuf};
|
||||
|
||||
use anyhow::Result;
|
||||
use clap::Parser;
|
||||
|
||||
use crate::value_noise::generate_noise;
|
||||
|
||||
mod ppm;
|
||||
mod value_noise;
|
||||
mod vec2;
|
||||
|
||||
#[derive(Parser)]
|
||||
struct Opt {
|
||||
#[clap(short = 'o', long = "out", default_value = "out.ppm")]
|
||||
output_path: PathBuf,
|
||||
}
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let opt = Opt::parse();
|
||||
|
||||
let rng = rand::thread_rng();
|
||||
|
||||
let width = 256;
|
||||
let height = 256;
|
||||
let ppm = generate_noise(width, height, rng);
|
||||
|
||||
{
|
||||
let file = File::create(opt.output_path)?;
|
||||
ppm.write(file)?;
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
26
assignment-0/src/ppm.rs
Normal file
26
assignment-0/src/ppm.rs
Normal file
|
|
@ -0,0 +1,26 @@
|
|||
use std::io::{Result, Write};
|
||||
|
||||
pub struct Pixel(pub u8, pub u8, pub u8);
|
||||
|
||||
pub struct Ppm {
|
||||
pub(crate) width: usize,
|
||||
pub(crate) height: usize,
|
||||
pub(crate) data: Vec<Pixel>,
|
||||
}
|
||||
|
||||
impl Ppm {
|
||||
pub fn write(&self, mut w: impl Write) -> Result<()> {
|
||||
// Header
|
||||
let header = format!("P3 {} {} 255\n", self.width, self.height);
|
||||
w.write_all(header.as_bytes())?;
|
||||
|
||||
// Pixel data
|
||||
for pixel in self.data.iter() {
|
||||
let Pixel(red, green, blue) = pixel;
|
||||
let pixel = format!("{red} {green} {blue}\n");
|
||||
w.write_all(pixel.as_bytes())?;
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
88
assignment-0/src/value_noise.rs
Normal file
88
assignment-0/src/value_noise.rs
Normal file
|
|
@ -0,0 +1,88 @@
|
|||
// https://www.scratchapixel.com/lessons/procedural-generation-virtual-worlds/procedural-patterns-noise-part-1/creating-simple-2D-noise.html
|
||||
|
||||
use std::mem::{self};
|
||||
|
||||
use rand::{Rng, RngCore};
|
||||
|
||||
use crate::ppm::{Pixel, Ppm};
|
||||
use crate::vec2::Vec2;
|
||||
|
||||
const MAX_TABLE_SIZE: usize = 256;
|
||||
const MAX_TABLE_SIZE_MASK: usize = MAX_TABLE_SIZE - 1;
|
||||
|
||||
pub fn generate_noise(width: usize, height: usize, rng: impl RngCore) -> Ppm {
|
||||
let mut noise_map = vec![0.0; width * height];
|
||||
let noise = ValueNoise::new(rng);
|
||||
let frequency = 0.05;
|
||||
|
||||
for j in 0..height {
|
||||
for i in 0..width {
|
||||
let vec = Vec2::new(i as f64, j as f64);
|
||||
noise_map[j * width + i] = noise.eval(vec * frequency);
|
||||
}
|
||||
}
|
||||
|
||||
let data = noise_map
|
||||
.into_iter()
|
||||
.map(|f| {
|
||||
let v = (f * 256.0).floor() as u8;
|
||||
Pixel(v, v, v)
|
||||
})
|
||||
.collect();
|
||||
Ppm {
|
||||
width,
|
||||
height,
|
||||
data,
|
||||
}
|
||||
}
|
||||
|
||||
pub struct ValueNoise {
|
||||
r: [f64; MAX_TABLE_SIZE * MAX_TABLE_SIZE],
|
||||
}
|
||||
|
||||
impl ValueNoise {
|
||||
pub fn new(mut rng: impl RngCore) -> Self {
|
||||
let mut r: [f64; MAX_TABLE_SIZE * MAX_TABLE_SIZE] = unsafe { mem::zeroed() };
|
||||
for k in 0..MAX_TABLE_SIZE * MAX_TABLE_SIZE {
|
||||
r[k] = rng.gen_range(0.0..1.0);
|
||||
}
|
||||
ValueNoise { r }
|
||||
}
|
||||
|
||||
pub fn eval(&self, point: Vec2) -> f64 {
|
||||
let xi = point.x.floor();
|
||||
let yi = point.y.floor();
|
||||
|
||||
let tx = point.x - xi;
|
||||
let ty = point.y - yi;
|
||||
|
||||
let xi = xi as usize;
|
||||
let yi = yi as usize;
|
||||
|
||||
let rx0 = xi & MAX_TABLE_SIZE_MASK;
|
||||
let rx1 = (rx0 + 1) & MAX_TABLE_SIZE_MASK;
|
||||
let ry0 = yi & MAX_TABLE_SIZE_MASK;
|
||||
let ry1 = (ry0 + 1) & MAX_TABLE_SIZE_MASK;
|
||||
|
||||
let c00 = self.r[ry0 * MAX_TABLE_SIZE_MASK + rx0];
|
||||
let c10 = self.r[ry0 * MAX_TABLE_SIZE_MASK + rx1];
|
||||
let c01 = self.r[ry1 * MAX_TABLE_SIZE_MASK + rx0];
|
||||
let c11 = self.r[ry1 * MAX_TABLE_SIZE_MASK + rx1];
|
||||
|
||||
let sx = smooth_step(tx);
|
||||
let sy = smooth_step(ty);
|
||||
|
||||
let nx0 = lerp(c00, c10, sx);
|
||||
let nx1 = lerp(c01, c11, sx);
|
||||
|
||||
lerp(nx0, nx1, sy)
|
||||
}
|
||||
}
|
||||
|
||||
fn smooth_step(t: f64) -> f64 {
|
||||
t * t * (3.0 - 2.0 * t)
|
||||
}
|
||||
|
||||
fn lerp(lo: f64, hi: f64, t: f64) -> f64 {
|
||||
lo * (1.0 - t) + hi * t
|
||||
}
|
||||
23
assignment-0/src/vec2.rs
Normal file
23
assignment-0/src/vec2.rs
Normal file
|
|
@ -0,0 +1,23 @@
|
|||
use std::ops::Mul;
|
||||
|
||||
pub struct Vec2<T = f64> {
|
||||
pub x: T,
|
||||
pub y: T,
|
||||
}
|
||||
|
||||
impl<T> Vec2<T> {
|
||||
pub fn new(x: T, y: T) -> Self {
|
||||
Self { x, y }
|
||||
}
|
||||
}
|
||||
|
||||
impl<S: Copy, T: Mul<S>> Mul<S> for Vec2<T> {
|
||||
type Output = Vec2<T::Output>;
|
||||
|
||||
fn mul(self, rhs: S) -> Self::Output {
|
||||
Vec2 {
|
||||
x: self.x * rhs,
|
||||
y: self.y * rhs,
|
||||
}
|
||||
}
|
||||
}
|
||||
93
flake.lock
Normal file
93
flake.lock
Normal file
|
|
@ -0,0 +1,93 @@
|
|||
{
|
||||
"nodes": {
|
||||
"fenix": {
|
||||
"inputs": {
|
||||
"nixpkgs": "nixpkgs",
|
||||
"rust-analyzer-src": "rust-analyzer-src"
|
||||
},
|
||||
"locked": {
|
||||
"lastModified": 1674240251,
|
||||
"narHash": "sha256-AVMmf/CtcGensTZmMicToDpOwySEGNKYgRPC7lu3m8w=",
|
||||
"owner": "nix-community",
|
||||
"repo": "fenix",
|
||||
"rev": "d8067f4d1d3d30732703209bec5ca7d62aaececc",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "nix-community",
|
||||
"repo": "fenix",
|
||||
"type": "github"
|
||||
}
|
||||
},
|
||||
"flake-utils": {
|
||||
"locked": {
|
||||
"lastModified": 1667395993,
|
||||
"narHash": "sha256-nuEHfE/LcWyuSWnS8t12N1wc105Qtau+/OdUAjtQ0rA=",
|
||||
"owner": "numtide",
|
||||
"repo": "flake-utils",
|
||||
"rev": "5aed5285a952e0b949eb3ba02c12fa4fcfef535f",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"id": "flake-utils",
|
||||
"type": "indirect"
|
||||
}
|
||||
},
|
||||
"nixpkgs": {
|
||||
"locked": {
|
||||
"lastModified": 1673796341,
|
||||
"narHash": "sha256-1kZi9OkukpNmOaPY7S5/+SlCDOuYnP3HkXHvNDyLQcc=",
|
||||
"owner": "nixos",
|
||||
"repo": "nixpkgs",
|
||||
"rev": "6dccdc458512abce8d19f74195bb20fdb067df50",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "nixos",
|
||||
"ref": "nixos-unstable",
|
||||
"repo": "nixpkgs",
|
||||
"type": "github"
|
||||
}
|
||||
},
|
||||
"nixpkgs_2": {
|
||||
"locked": {
|
||||
"lastModified": 1667629849,
|
||||
"narHash": "sha256-P+v+nDOFWicM4wziFK9S/ajF2lc0N2Rg9p6Y35uMoZI=",
|
||||
"owner": "nixos",
|
||||
"repo": "nixpkgs",
|
||||
"rev": "3bacde6273b09a21a8ccfba15586fb165078fb62",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"id": "nixpkgs",
|
||||
"type": "indirect"
|
||||
}
|
||||
},
|
||||
"root": {
|
||||
"inputs": {
|
||||
"fenix": "fenix",
|
||||
"flake-utils": "flake-utils",
|
||||
"nixpkgs": "nixpkgs_2"
|
||||
}
|
||||
},
|
||||
"rust-analyzer-src": {
|
||||
"flake": false,
|
||||
"locked": {
|
||||
"lastModified": 1674162026,
|
||||
"narHash": "sha256-iY0bxoVE7zAZmp0BB/m5hZW5pWHUfgntDvc1m2zyt/U=",
|
||||
"owner": "rust-lang",
|
||||
"repo": "rust-analyzer",
|
||||
"rev": "6e52c64031825920983515b9e975e93232739f7f",
|
||||
"type": "github"
|
||||
},
|
||||
"original": {
|
||||
"owner": "rust-lang",
|
||||
"ref": "nightly",
|
||||
"repo": "rust-analyzer",
|
||||
"type": "github"
|
||||
}
|
||||
}
|
||||
},
|
||||
"root": "root",
|
||||
"version": 7
|
||||
}
|
||||
20
flake.nix
Normal file
20
flake.nix
Normal file
|
|
@ -0,0 +1,20 @@
|
|||
{
|
||||
inputs = { fenix.url = "github:nix-community/fenix"; };
|
||||
|
||||
outputs = { self, nixpkgs, flake-utils, fenix }:
|
||||
flake-utils.lib.eachDefaultSystem (system:
|
||||
let
|
||||
pkgs = import nixpkgs {
|
||||
inherit system;
|
||||
overlays = [ fenix.overlays.default ];
|
||||
};
|
||||
|
||||
toolchain = pkgs.fenix.default;
|
||||
in rec {
|
||||
devShell = pkgs.mkShell {
|
||||
packages = (with pkgs; [ cargo-watch cargo-deny cargo-edit ])
|
||||
++ (with toolchain; [ cargo rustc rustfmt clippy ]);
|
||||
CARGO_UNSTABLE_SPARSE_REGISTRY = "true";
|
||||
};
|
||||
});
|
||||
}
|
||||
Loading…
Reference in a new issue