Noratrieb/mandelbrot-rust
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better coloring

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nora 2021-03-09 11:10:52 +01:00
parent 36d838280d
commit 594e357aa5
2 changed files with 6 additions and 7 deletions
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13
src/lib.rs
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@ -6,6 +6,7 @@ use std::ops::{Add, Mul};
use std::time::{Duration, SystemTime}; use std::time::{Duration, SystemTime};
use image::{ImageBuffer, Rgb, RgbImage}; use image::{ImageBuffer, Rgb, RgbImage};
use std::cmp::max;
pub fn run(config: Config) -> Result<(), Box<dyn Error>> { pub fn run(config: Config) -> Result<(), Box<dyn Error>> {
let start_time = SystemTime::now(); let start_time = SystemTime::now();
@ -103,7 +104,7 @@ fn check_whole_mandelbrot_img_single_pass(config: &Config) -> Result<(), Box<dyn
for i in 0..height as usize { for i in 0..height as usize {
for j in 0..config.width as usize { for j in 0..config.width as usize {
let value = check_mandelbrot(j, i, config, &offset, &step_size); let value = check_mandelbrot(j, i, config, &offset, &step_size);
*image.get_pixel_mut(j as u32, i as u32) = get_color_for_pixel(value, config.iterations) *image.get_pixel_mut(j as u32, i as u32) = get_color_for_pixel(value as f32, config.iterations as f32)
} }
if config.debug { if config.debug {
@ -122,12 +123,10 @@ fn check_whole_mandelbrot_img_single_pass(config: &Config) -> Result<(), Box<dyn
Ok(()) Ok(())
} }
fn get_color_for_pixel(value: u32, iter: u32) -> Rgb<u8> { fn get_color_for_pixel(value: f32, iter: f32) -> Rgb<u8> {
if value < iter { let multiplier: f32 = 1.0 - (value * value).min(iter) / iter;
image::Rgb([255, 255, 255]) let i: u8 = (255 as f32 * multiplier) as u8;
} else { image::Rgb([i, i, i])
image::Rgb([0, 0, 0])
}
} }
fn draw(values: &Vec<Vec<u32>>, iterations: u32) -> String { fn draw(values: &Vec<Vec<u32>>, iterations: u32) -> String {