The.

.gitignore

@@ -1 +1,3 @@
 /target
+imgs/*
+*.mp4

Makefile

@@ -0,0 +1,3 @@
+default:
+	cargo r
+	ffmpeg -framerate 25 -i imgs/%d.png -crf 20 -pix_fmt yuv420p output.mp4

src/main.rs

@@ -2,48 +2,61 @@ use image::{ImageBuffer, Rgb};
 use rayon::prelude::*;
 
 // Image size.
-const IMGW: u32 = 1000;
+const IMGW: u32 = 1024;
-const IMGH: u32 = 1000;
+const IMGH: u32 = 1024;
 
 // Fractal settings.
-const MAXITER: u32 = 600;
+const MAXITER: u32 = IMGW;
+const MAXITER_F64: f64 = MAXITER as f64;
 const ESCRAD: f64 = 2.4;
 
-// Fractal bounds.
-const XMIN: f64 = 2.0;
-const XMAX: f64 = -2.0;
-const YMIN: f64 = 2.0;
-const YMAX: f64 = -2.0;
-
 fn main() {
     let w = IMGW as f64;
     let h = IMGH as f64;
 
-    let pxs: Vec<u8> = (0..IMGH)
+    // Fractal bounds.
-        .into_par_iter()
+    let mut width: f64 = 2.0; // Initial frame width
-        .flat_map(|y| {
+    let mut xmin: f64 = -1.0;
-            let fy = y as f64;
+    let mut ymin: f64 = -1.0;
-            (0..IMGW)
-                .into_par_iter()
-                .flat_map(move |x| {
-                    let cx = map_range(x as f64, 0.0, w, XMIN, XMAX);
-                    let cy = map_range(fy, 0.0, h, YMIN, YMAX);
-                    let c = num_complex::Complex::new(cx, cy);
 
-                    // Compute color for each pixel.
+    let target_x = -0.4638686756;
-                    col_map(esc_time(c)).to_vec()
+    let target_y = 0.0723647;
-                })
-                .collect::<Vec<u8>>()
-        })
-        .collect();
 
-    // Create the image from the pixel buffer.
+    let zoom_factor = 1.2;
-    let img = ImageBuffer::<Rgb<u8>, _>::from_raw(IMGW, IMGH, pxs).unwrap();
 
-    img.save("h.png").unwrap();
+    for i in 1..200 {
-    println!("Done.");
+        let pxs: Vec<u8> = (0..IMGH)
+            .into_par_iter()
+            .flat_map(|y| {
+                let fy = y as f64;
+                (0..IMGW)
+                    .into_par_iter()
+                    .flat_map(move |x| {
+                        let cx = map_range(x as f64, 0.0, w, xmin, xmin + width);
+                        let cy = map_range(fy, 0.0, h, ymin, ymin + width);
+                        let c = num_complex::Complex::new(cx, cy);
+
+                        // Compute color for each pixel.
+                        col_map(esc_time(c)).to_vec()
+                    })
+                    .collect::<Vec<u8>>()
+            })
+            .collect();
+
+        // Create the image from the pixel buffer.
+        let img = ImageBuffer::<Rgb<u8>, _>::from_raw(IMGW, IMGH, pxs).unwrap();
+
+        img.save(format!("imgs/{i}.png")).unwrap();
+        println!("#{i} done.");
+
+        // Adjust bounds for the next zoom level
+        xmin = target_x - width / 2.0;
+        ymin = target_y - width / 2.0;
+        width /= zoom_factor; // Zoom in by reducing width
+    }
 }
 
+
 // Maps a value from one range to another.
 fn map_range(val: f64, imin: f64, imax: f64, omin: f64, omax: f64) -> f64 {
     omin + (val - imin) * (omax - omin) / (imax - imin)
@@ -66,8 +79,8 @@ fn col_map(iter: u32) -> [u8; 3] {
     if iter == MAXITER {
         [0, 0, 0] // Black for points that never escape.
     } else {
-        let t = iter as f64 / MAXITER as f64;
+        let t = iter as f64 / MAXITER_F64;
-        let c = (t * 700.0) as u8;
+        let c = (t * MAXITER_F64) as u8;
         [c, c, c]
     }
 }