Sierpinski pentagon: Difference between revisions

Line 1,141:

fn sierpinski_pentagon(mut document : svg::Document, mut x : f64, mut y : f64,

mut side : f64, order: usize) -> svg::Document {

use svg::node::element::~~Path~~;

use svg::node::element::Polygon;

use svg::node::element::path::Data;

use std::f64::consts::PI;

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if order == 1 {

let mut ~~data~~ = ~~Data~~::new();

let mut points = Vec::new();

~~data = data~~.~~move_to~~((x, y));

points.push((x, y));

for _ in 0..5 {

x += angle.cos() * side;

y -= angle.sin() * side;

angle += degrees72;

~~data = data~~.~~line_to~~((x, y));

points.push((x, y));

}

~~data~~ = ~~data.close~~();

let polygon = Polygon::new()

let path = Path::new()

.set("fill", "blue")

.set("stroke", "black")

.set("stroke-width", "1")

.set("d", ~~data~~);

.set("points", points);

document = document.add(~~path~~);

document = document.add(polygon);

} else {

side *= scale_factor;

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let radius = (size as f64)/2.0 - 2.0 * margin;

let side = radius * (0.2 * PI).sin() * 2.0;

let height = side * ((0.2 * PI).sin() + (0.4 * PI).sin());

let x = (size as f64)/2.0;

let y = ~~3.0~~ * ~~margin~~;

let y = (size as f64 - height)/2.0;

let rect = Rectangle::new()