finish

Cargo.toml

@@ -6,3 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+image = "0.24.7"
+clap = { version = "4.4.8", features = ["derive"] }
+rand = "0.8.5"

src/main.rs

@@ -1,3 +1,41 @@
-fn main() {
-    println!("Hello, world!");
+use image::ImageBuffer;
+use image::Rgb;
+use clap::Parser;
+use rand::Rng;
+
+#[derive(Parser, Debug)]
+struct Args {
+    /// width and height of the image
+    #[arg(short, long, default_value_t = 2000)]
+    width: u32,
+
+    /// The multiplicator
+    #[arg(short, default_value_t = 96)]
+    modulo: u32
 }
+
+fn main() {
+    let args = Args::parse();
+    let mut img: ImageBuffer<Rgb<u8>, Vec<u8>> = ImageBuffer::new(args.width, args.width);
+    let mut colors: Vec<[u8; 3]> = vec![];
+    for x in 0..img.width() {
+        for y in 0..img.height() {
+            let result: usize = (x * y % args.modulo).try_into().unwrap();
+            if colors.get(result).is_some() {
+                img.put_pixel(x, y, Rgb(colors[(x * y % args.modulo) as usize]));
+            } else {
+                colors.insert(result, [generate_random(0, 255), generate_random(0, 255), generate_random(0, 255)]);
+            }
+        }
+    }
+    img.save("modraw.png").expect("Failed to save image");
+    println!("{colors:?}");
+    println!("{:?}", colors.len());
+}
+
+fn generate_random(start: u8, end: u8) -> u8 {
+    let mut rng = rand::thread_rng();
+    // rng.gen_range(std::char::from_u32(start).unwrap()..=std::char::from_u32(end).unwrap())
+    rng.gen_range(start..=end)
+}
+