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Invert triangle
+16
-3
+16
-3
sierpinski
+16
-3
sierpinski
···
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#[derive(FromArgs)]
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#[argh(description = "Prints a Sierpinski triangle.")]
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struct App {
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#[argh(switch, description = "inverts the triangle.")]
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invert: bool,
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#[argh(
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option,
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description = "triangle type to use.",
···
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}
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fn main() {
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let App { size, triangle } = argh::from_env();
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let App {
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size,
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triangle,
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invert,
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} = argh::from_env();
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let size = size.unwrap_or(1);
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let height = 2_usize.pow(size as u32);
···
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bounding_box[0][height - 1] = 1;
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let mut last_row = bounding_box[0].clone();
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for (i, row) in bounding_box.iter_mut().skip(1).enumerate() {
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for row in bounding_box.iter_mut().skip(1) {
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for (j, cell) in row.iter_mut().enumerate() {
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let top_left = last_row.get(j - 1).unwrap_or(&0);
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let top_right = last_row.get(j + 1).unwrap_or(&0);
···
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last_row = row.clone();
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}
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-
for row in bounding_box {
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let rows: Box<dyn Iterator<Item = Vec<u16>>> = if invert {
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Box::new(bounding_box.into_iter().rev())
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} else {
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Box::new(bounding_box.into_iter())
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};
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for row in rows {
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for cell in row {
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if cell == 0 || cell % 2 == 0 {
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print!(" ");