@tldraw/editor
Version:
A tiny little drawing app (editor).
73 lines (72 loc) • 1.97 kB
JavaScript
import { Vec } from "../Vec.mjs";
import { Edge2d } from "./Edge2d.mjs";
import { Geometry2d } from "./Geometry2d.mjs";
class Polyline2d extends Geometry2d {
points;
constructor(config) {
super({ isClosed: false, isFilled: false, ...config });
const { points } = config;
this.points = points;
}
_segments;
// eslint-disable-next-line no-restricted-syntax
get segments() {
if (!this._segments) {
this._segments = [];
const { vertices } = this;
for (let i = 0, n = vertices.length - 1; i < n; i++) {
const start = vertices[i];
const end = vertices[i + 1];
this._segments.push(new Edge2d({ start, end }));
}
if (this.isClosed) {
this._segments.push(new Edge2d({ start: vertices[vertices.length - 1], end: vertices[0] }));
}
}
return this._segments;
}
getLength() {
return this.segments.reduce((acc, segment) => acc + segment.length, 0);
}
getVertices() {
return this.points;
}
nearestPoint(A) {
const { segments } = this;
let nearest = this.points[0];
let dist = Infinity;
let p;
let d;
for (let i = 0; i < segments.length; i++) {
p = segments[i].nearestPoint(A);
d = Vec.Dist2(p, A);
if (d < dist) {
nearest = p;
dist = d;
}
}
if (!nearest) throw Error("nearest point not found");
return nearest;
}
hitTestLineSegment(A, B, distance = 0) {
const { segments } = this;
for (let i = 0, n = segments.length; i < n; i++) {
if (segments[i].hitTestLineSegment(A, B, distance)) {
return true;
}
}
return false;
}
getSvgPathData() {
const { vertices } = this;
if (vertices.length < 2) return "";
return vertices.reduce((acc, vertex, i) => {
if (i === 0) return `M ${vertex.x} ${vertex.y}`;
return `${acc} L ${vertex.x} ${vertex.y}`;
}, "");
}
}
export {
Polyline2d
};
//# sourceMappingURL=Polyline2d.mjs.map