June 2018 Update

Task/Mandelbrot-set/Rust/mandelbrot-set.rust

@@ -0,0 +1,43 @@
+extern crate image;
+extern crate num_complex;
+
+use std::fs::File;
+use num_complex::Complex;
+
+fn main() {
+    let max_iterations = 256u16;
+    let img_side = 800u32;
+    let cxmin = -2f32;
+    let cxmax = 1f32;
+    let cymin = -1.5f32;
+    let cymax = 1.5f32;
+    let scalex = (cxmax - cxmin) / img_side as f32;
+    let scaley = (cymax - cymin) / img_side as f32;
+
+    // Create a new ImgBuf
+    let mut imgbuf = image::ImageBuffer::new(img_side, img_side);
+
+    // Calculate for each pixel
+    for (x, y, pixel) in imgbuf.enumerate_pixels_mut() {
+        let cx = cxmin + x as f32 * scalex;
+        let cy = cymin + y as f32 * scaley;
+
+        let c = Complex::new(cx, cy);
+        let mut z = Complex::new(0f32, 0f32);
+
+        let mut i = 0;
+        for t in 0..max_iterations {
+            if z.norm() > 2.0 {
+                break;
+            }
+            z = z * z + c;
+            i = t;
+        }
+
+        *pixel = image::Luma([i as u8]);
+    }
+
+    // Save image
+    let fout = &mut File::create("fractal.png").unwrap();
+    image::ImageLuma8(imgbuf).save(fout, image::PNG).unwrap();
+}