From 605c1d75ef8303b9d112a114d5c5b9b09e19a3a8 Mon Sep 17 00:00:00 2001
From: zeefaad <zefad83@gmail.com>
Date: Sat, 14 Feb 2026 12:39:06 +0100
Subject: [PATCH] init chladni

---
 .gitignore  |    3 +
 Cargo.lock  | 1016 +++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |    7 +
 src/main.rs |   38 ++
 4 files changed, 1064 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5608b1e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+/target
+src/target
+out
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..eebcebb
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1016 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..317987a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "chladni"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+image = "0.25.9"
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..63023cc
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,38 @@
+use image::{ImageBuffer, Rgb, RgbImage};
+use std::f64::consts::PI;
+
+fn chladni(x: f64, y: f64, n: f64, m: f64) -> f64 {
+    (n * PI * x).cos() * (m * PI * y).cos() - (m * PI * x).cos() * (n * PI * y).cos()
+}
+
+fn generate_png(n: u32, m: u32, width: u32, height: u32) {
+    let mut img: RgbImage = ImageBuffer::new(width, height);
+
+    for (x, y, pixel) in img.enumerate_pixels_mut() {
+        let xf = (x as f64 / width as f64) * 2.0 - 1.0;
+        let yf = (y as f64 / height as f64) * 2.0 - 1.0;
+
+        let val = chladni(xf, yf, n as f64, m as f64);
+        let intensity = val.abs();
+
+        let brigh = (((0.08 - intensity).max(0.0) / 0.08) * 255.0) as u8;
+        *pixel = Rgb([brigh, brigh, brigh]);
+    }
+
+    let filename = format!("chladni_{}_{}.png", n, m);
+    img.save(&filename).unwrap();
+    println!("{}", filename);
+}
+
+fn main() {
+    let width = 1000;
+    let height = 1000;
+    let max_n = 6;
+    let max_m = 6;
+
+    for n in 1..max_n {
+        for m in 1..max_m {
+            generate_png(n, m, width, height);
+        }
+    }
+}