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38 lines
974 B
38 lines
974 B
7 months ago
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use plotters::coord::Shift;
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use plotters::prelude::*;
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pub fn sierpinski_carpet(
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depth: u32,
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drawing_area: &DrawingArea<BitMapBackend, Shift>,
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) -> Result<(), Box<dyn std::error::Error>> {
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if depth > 0 {
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let sub_areas = drawing_area.split_evenly((3, 3));
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for (idx, sub_area) in (0..).zip(sub_areas.iter()) {
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if idx != 4 {
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sub_area.fill(&BLUE)?;
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sierpinski_carpet(depth - 1, sub_area)?;
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} else {
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sub_area.fill(&WHITE)?;
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}
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}
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}
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Ok(())
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}
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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let root =
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BitMapBackend::new("plotters-doc-data/sierpinski.png", (1024, 768)).into_drawing_area();
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root.fill(&WHITE)?;
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let root = root
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.titled("Sierpinski Carpet Demo", ("sans-serif", 60))?
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.shrink(((1024 - 700) / 2, 0), (700, 700));
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sierpinski_carpet(5, &root)
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}
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#[test]
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fn entry_point() {
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main().unwrap()
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}
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