58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
//Cargo deps :
|
|
// piston = "0.35.0"
|
|
// piston2d-graphics = "0.23.0"
|
|
// piston2d-opengl_graphics = "0.49.0"
|
|
// pistoncore-glutin_window = "0.42.0"
|
|
|
|
extern crate piston;
|
|
extern crate graphics;
|
|
extern crate opengl_graphics;
|
|
extern crate glutin_window;
|
|
|
|
use piston::window::WindowSettings;
|
|
use piston::event_loop::{Events, EventSettings};
|
|
use piston::input::RenderEvent;
|
|
use glutin_window::GlutinWindow as Window;
|
|
use opengl_graphics::{GlGraphics, OpenGL};
|
|
use graphics::{clear, line, Context};
|
|
|
|
const ANG: f64 = 20.0;
|
|
const COLOR: [f32; 4] = [1.0, 0.0, 0.5, 1.0];
|
|
const LINE_THICKNESS: f64 = 5.0;
|
|
const DEPTH: u32 = 11;
|
|
|
|
fn main() {
|
|
let mut window: Window = WindowSettings::new("Fractal Tree", [1024, 768])
|
|
.opengl(OpenGL::V3_2)
|
|
.exit_on_esc(true)
|
|
.build()
|
|
.unwrap();
|
|
let mut gl = GlGraphics::new(OpenGL::V3_2);
|
|
|
|
let mut events = Events::new(EventSettings::new());
|
|
while let Some(e) = events.next(&mut window) {
|
|
if let Some(args) = e.render_args() {
|
|
gl.draw(args.viewport(), |c, g| {
|
|
clear([1.0, 1.0, 1.0, 1.0], g);
|
|
draw_fractal_tree(512.0, 700.0, 0.0, DEPTH, c, g);
|
|
});
|
|
}
|
|
}
|
|
}
|
|
|
|
fn draw_fractal_tree(x1: f64, y1: f64, angle: f64, depth: u32, c: Context, g: &mut GlGraphics) {
|
|
let x2 = x1 + angle.to_radians().sin() * depth as f64 * 10.0;
|
|
let y2 = y1 - angle.to_radians().cos() * depth as f64 * 10.0;
|
|
line(
|
|
COLOR,
|
|
LINE_THICKNESS * depth as f64 * 0.2,
|
|
[x1, y1, x2, y2],
|
|
c.transform,
|
|
g,
|
|
);
|
|
if depth > 0 {
|
|
draw_fractal_tree(x2, y2, angle - ANG, depth - 1, c, g);
|
|
draw_fractal_tree(x2, y2, angle + ANG, depth - 1, c, g);
|
|
}
|
|
}
|