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mod pixel_buffer;
use bitvec::prelude::*;
use pixel_buffer::PixelBuffer;
pub fn get_hitomezashi_pattern(
x_pattern: BitVec,
y_pattern: BitVec,
gap: usize,
line_thickness: usize,
) -> PixelBuffer {
let mut buf = PixelBuffer::new(x_pattern.len() * gap, y_pattern.len() * gap);
// Draw y pattern (horizontal) lines
for i in 0..y_pattern.len() {
for j in 0..x_pattern.len() {
if (j % 2 != 0) == y_pattern[i] {
let x = j * gap;
let y = i * gap;
let width = gap;
let height = line_thickness;
buf.fill_rect(x, y, width, height);
}
}
}
// Draw x pattern (vertical) lines
for i in 0..x_pattern.len() {
for j in 0..y_pattern.len() {
if (j % 2 != 0) == x_pattern[i] {
let x = i * gap;
let y = j * gap;
let width = line_thickness;
let height = gap;
buf.fill_rect(x, y, width, height)
}
}
}
// Join up the lines to avoid leaving holes at the intersections
// The best way to understand how this works is to try commenting it out
for x in (gap..buf.width).step_by(gap) {
for y in (gap..buf.height).step_by(gap) {
let width = line_thickness;
let height = line_thickness;
buf.fill_rect(x, y, width, height);
}
}
buf
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test() {
let x_pattern = bitvec![1, 1, 0, 1, 1, 1];
let y_pattern = bitvec![0, 1, 1, 0, 0, 0];
let result = format!("{}", get_hitomezashi_pattern(x_pattern, y_pattern, 3, 1));
println!("{}", result);
assert!(result == "███ ███ ███ \n █ \n █ \n█ ████ ████ ███\n█ █ █ █ █ \n█ █ █ █ █ \n ████ ████ ███\n █ \n █ \n████ ████ ████ \n█ █ █ █ █ \n█ █ █ █ █ \n████ ████ ████ \n █ \n █ \n████ ████ ████ \n█ █ █ █ █ \n█ █ █ █ █ \n")
}
}
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