seed.js

#!/bin/sh
':' //; exec "$(command -v nodejs || command -v node)" "$0" "$@"
"use strict";

/*
 
 Seed stitch rectangle (though code is written to work for any front/back knit pattern)

 */


const Carrier = ['1'];
const Width = 60;
const Height = 40;
//pattern will be tiled to Width/Height:
const Pattern = [
	'fb',
	'bf'
];



console.log(";!knitout-2")
console.log(";;Carriers: 1 2 3 4 5 6 7 8 9 10")

const min = 1;
const max = Width;

//all-needle cast-on:
function caston() {
	console.log("x-stitch-number 61");
	console.log("inhook " + Carrier);
	for (let n = max; n >= min; --n) {
		if ((max-n)%2 == 0) {
			console.log("knit - f" + n + " " + Carrier);
		}
	}
	for (let n = min; n <= max; ++n) {
		if ((max-n)%2 != 0) {
			console.log("knit + f" + n + " " + Carrier);
		}
	}
	for (let n = max; n >= min; --n) {
		console.log("knit - f" + n + " " + Carrier);
	}
	console.log("releasehook " + Carrier);
}
caston();


console.log("x-stitch-number 94");

let on = [];
//all stitches start on front bed:
for (let s = 0; s <= (max-min); ++s) {
	on.push('f');
}

//build pattern:
for (let r = 0; r < Height; ++r) {
	let target = [];
	const PatternRow = Pattern[Pattern.length - 1 - (r % Pattern.length)];
	for (let s = 0; s <= (max-min); ++s) {
		target.push(PatternRow[s % PatternRow.length]);
	}

	for (let n = min; n <= max; ++n) {
		if (on[n-min] !== target[n-min]) {
			console.log("xfer " + on[n-min] + n + " " + target[n-min] + n);
		}
	}
	on = target;

	if (r % 2 === 0) {
		for (let n = min; n <= max; ++n) {
			console.log("knit + " + on[n-min] + n + " " + Carrier);
		}
	} else {
		for (let n = max; n >= min; --n) {
			console.log("knit - " + on[n-min] + n + " " + Carrier);
		}
	}
}


//everything back to front bed for bind-off:
for (let n = min; n <= max; ++n) {
	if (on[n-min] !== 'f') {
		console.log("xfer " + on[n-min] + n + " f" + n);
	}
}

console.log("outhook " + Carrier);

//...but no bind off:
for (let n = min; n <= max; ++n) {
	console.log("drop f" + n);
}