Works

mas/fractals/mandel/src/main.rs

@@ -13,20 +13,18 @@ fn main() {
     let height: u32 = args[2].parse::<u32>().unwrap();
     println!("{} {}", width, height);
     */
-    let (width, height) = (640, 480);
+    let (width, height) = (1600, 900);
-    let (xr, yr) = ([-2.0, 0.47], [-2.12, 2.12]);
+    let depth = 5000;
-    let theta = 0.01;
-    let scale = 100.0;
-    let depth = 400;
     
     let (window, ctx, vid_sys) = render::create_window("Mandelbrot set", width, height);
 
     let mut canvas = window.into_canvas().build().unwrap();
-    canvas.set_draw_color(Color::RGB(255, 255, 255));
+    canvas.set_draw_color(Color::RGB(0, 0, 0));
     canvas.clear();
-    canvas.present();
+    //canvas.present();
 
-    mandel::mandelbrot(&mut canvas, width, height, depth);
+    println!("Rendering...");
+    mandel::mandelbrot(&mut canvas, width, height, depth, 0.0, 0.0, 0.0, 0.0);
     canvas.present();
 
     println!("Post mandel render");

mas/fractals/mandel/src/mandel.rs

@@ -4,55 +4,18 @@ use num::complex::Complex64;
 use sdl2::pixels::Color;
 use sdl2::render::Canvas;
 
-/*
-#[derive(Debug)]
-pub struct Color {
-    r: u8,
-    g: u8,
-    b: u8
-}
-
-impl Color {
-    pub fn rgb(r: u8, g: u8, b: u8) -> Self {
-        Self { r, g, b }
-    }
-}
-*/
-
-fn mandel(n: u64, c: Complex64) -> Complex64 {
-    if n == 0 {
-        return Complex64::new(0.0, 0.0);
-    } else {
-        return mandel(n-1, c).norm() + c;
-    }
-}
-
-pub fn get_point_color(x: f32, y: f32, depth: u64) -> Color {
-    let c = Complex64::new(x.into(), y.into());
-    let mut z = mandel(depth, c);
-    let mut norm = z.re*z.re - z.im*z.im;
-
-    //println!("{:?} {:?} < 2?", z, norm);
-    
-    if norm < 4.0 {
-        return Color::RGB(0, 0, 0);
-    } else {
-        return Color::RGB(250, 250, 250);
-    }
-}
-
 pub fn get_col(i: u32, max_iter: u32) -> Color {
     if i > max_iter || i == 255 {
         return Color::RGB(255, 255, 255);
     } else {
-        return Color::RGB(i as u8, i as u8, i as u8);
+        return Color::RGB(i as u8, 0, i as u8);
     }
 }
 
-pub fn mandelbrot(canvas: &mut Canvas<sdl2::video::Window>, w: u32, h: u32, depth: u32) {
+pub fn mandelbrot(canvas: &mut Canvas<sdl2::video::Window>, w: u32, h: u32, depth: u32, xzoom: f32, yzoom: f32, xoffset: f32, yoffset: f32) {
 
     /*
-for each pixel (Px, Py) on the screen do
+    for each pixel (Px, Py) on the screen do
         x0 := scaled x coordinate of pixel (scaled to lie in the Mandelbrot X scale (-2.00, 0.47))
         y0 := scaled y coordinate of pixel (scaled to lie in the Mandelbrot Y scale (-1.12, 1.12))
         x := 0.0
@@ -67,16 +30,14 @@ for each pixel (Px, Py) on the screen do
      
         color := palette[iteration]
         plot(Px, Py, color)
-
    */
 
-    let (mut x, mut y) = (0.0, 0.0);
-
     for dx in 0..w {
-        let x0 = ((dx as f32) / (w as f32)) * 3.5 - 2.5;
+        let x0 = ((dx as f32) / (w as f32)) * (3.5 + xzoom) - (2.5 + xoffset);
         for dy in 0..h {
-            let y0 = ((dy as f32) / (h as f32)) * 2.0 - 1.0;
+            let y0 = ((dy as f32) / (h as f32)) * (2.0 + yzoom) - (1.0 + yoffset);
 
+        let (mut x, mut y) = (0.0, 0.0);
             let mut i: u32 = 0;
             
             while i < depth && x*x + y*y <= 4.0 {