73 lines
1.8 KiB
TypeScript
73 lines
1.8 KiB
TypeScript
|
import {normalize} from "./normalize";
|
||
|
|
|
||
|
|
export function pts2plotter(pts: [number, number][][], width: number, height: number, px2mm = 0.1){
|
||
|
|
let str = init(width * px2mm, height * px2mm);
|
||
|
|
|
||
|
|
// sort paths by x(long) then by y(short)
|
||
|
|
const sorted = pts.slice();
|
||
|
|
sorted.sort(function (a, b) {
|
||
|
|
const [ax,ay] = topleft(a);
|
||
|
|
const [bx,by] = topleft(b);
|
||
|
|
|
||
|
|
if (ax !== bx) return ax - bx;
|
||
|
|
return ay - by;
|
||
|
|
});
|
||
|
|
|
||
|
|
let lead = true;
|
||
|
|
for(const path of sorted){
|
||
|
|
for (const cmd of poly(normalize(path), height, px2mm, lead)) {
|
||
|
|
str += cmd;
|
||
|
|
}
|
||
|
|
lead = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
str += end();
|
||
|
|
|
||
|
|
return str;
|
||
|
|
}
|
||
|
|
|
||
|
|
function topleft(pts: [number, number][]){
|
||
|
|
let minx = NaN;
|
||
|
|
let miny = NaN;
|
||
|
|
for(const pt of pts){
|
||
|
|
if (isNaN(minx) || minx > pt[0]) minx = pt[0];
|
||
|
|
if (isNaN(miny) || miny > pt[1]) miny = pt[1];
|
||
|
|
}
|
||
|
|
return [minx, miny] as [number, number];
|
||
|
|
}
|
||
|
|
|
||
|
|
function init(w: number, h: number) {
|
||
|
|
return ` IN TB26,${plu(w)},${plu(h)} CT1 U0,0 D0,0 D40,0`;
|
||
|
|
}
|
||
|
|
|
||
|
|
function end() {
|
||
|
|
return ' U0,0 @ @';
|
||
|
|
}
|
||
|
|
|
||
|
|
function* poly(pts: [number, number][], height: number, px2mm: number, lead = false){
|
||
|
|
function cutpt(down: boolean, pt: [number, number]) {
|
||
|
|
return ` ${down ? 'D' : 'U'}${plu(pt[0] * px2mm)},${plu((height - pt[1]) * px2mm)}`;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (lead) {
|
||
|
|
yield cutpt(false, [0, 0]);
|
||
|
|
yield cutpt(true, [0, 1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
yield cutpt(false, pts[0]);
|
||
|
|
for(const pt of pts){
|
||
|
|
yield cutpt(true, pt);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function sqrlen(x: number, y: number) {
|
||
|
|
return x * x + y * y;
|
||
|
|
}
|
||
|
|
|
||
|
|
function lerp(s: [number, number], e: [number, number], i: number) {
|
||
|
|
return [s[0] + (e[0] - s[0]) * i, s[1] + (e[1] - s[1]) * i] as typeof s;
|
||
|
|
}
|
||
|
|
|
||
|
|
function plu(n: number) {
|
||
|
|
return Math.round(n / 0.025);
|
||
|
|
}
|