jacob/ln-fractal
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This commit is contained in:
Jacob Signorovitch 2024-12-16 00:04:17 -05:00
parent 7729b2234b
commit 74e2d6190a
1 changed files with 12 additions and 7 deletions
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19
src/main.rs
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@ -1,7 +1,10 @@
use image::{ImageBuffer, Rgb}; use image::{ImageBuffer, Rgb};
use rayon::prelude::*; use rayon::prelude::*;
// Image size. // Number of frames to generate.
const FRAMES = 200;
// Frame size.
const IMGW: u32 = 1024; const IMGW: u32 = 1024;
const IMGH: u32 = 1024; const IMGH: u32 = 1024;
@ -10,6 +13,10 @@ const MAXITER: u32 = IMGW;
const MAXITER_F64: f64 = MAXITER as f64; const MAXITER_F64: f64 = MAXITER as f64;
const ESCRAD: f64 = 2.4; const ESCRAD: f64 = 2.4;
// Target coordinates (what to "zoom in on" with each new frame.)
const TARGX = -0.4638686756;
const TARGX = 0.0723647;
fn main() { fn main() {
let w = IMGW as f64; let w = IMGW as f64;
let h = IMGH as f64; let h = IMGH as f64;
@ -19,12 +26,9 @@ fn main() {
let mut xmin: f64 = -1.0; let mut xmin: f64 = -1.0;
let mut ymin: f64 = -1.0; let mut ymin: f64 = -1.0;
let target_x = -0.4638686756;
let target_y = 0.0723647;
let zoom_factor = 1.2; let zoom_factor = 1.2;
for i in 1..200 { for i in 1..FRAMES {
let pxs: Vec<u8> = (0..IMGH) let pxs: Vec<u8> = (0..IMGH)
.into_par_iter() .into_par_iter()
.flat_map(|y| { .flat_map(|y| {
@ -50,8 +54,8 @@ fn main() {
println!("#{i} done."); println!("#{i} done.");
// Adjust bounds for the next zoom level // Adjust bounds for the next zoom level
xmin = target_x - width / 2.0; xmin = TARGX - width / 2.0;
ymin = target_y - width / 2.0; ymin = TARGY - width / 2.0;
width /= zoom_factor; // Zoom in by reducing width width /= zoom_factor; // Zoom in by reducing width
} }
} }
@ -79,6 +83,7 @@ fn col_map(iter: u32) -> [u8; 3] {
if iter == MAXITER { if iter == MAXITER {
[0, 0, 0] // Black for points that never escape. [0, 0, 0] // Black for points that never escape.
} else { } else {
// TODO: Fancy colors.
let t = iter as f64 / MAXITER_F64; let t = iter as f64 / MAXITER_F64;
let c = (t * MAXITER_F64) as u8; let c = (t * MAXITER_F64) as u8;
[c, c, c] [c, c, c]