@tldraw/editor
Version:
tldraw infinite canvas SDK (editor).
113 lines (112 loc) • 3.98 kB
JavaScript
;
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
var Arc2d_exports = {};
__export(Arc2d_exports, {
Arc2d: () => Arc2d
});
module.exports = __toCommonJS(Arc2d_exports);
var import_intersect = require("../intersect");
var import_utils = require("../utils");
var import_Vec = require("../Vec");
var import_geometry_constants = require("./geometry-constants");
var import_Geometry2d = require("./Geometry2d");
class Arc2d extends import_Geometry2d.Geometry2d {
_center;
_radius;
_start;
_end;
_largeArcFlag;
_sweepFlag;
_measure;
_angleStart;
_angleEnd;
constructor(config) {
super({ ...config, isFilled: false, isClosed: false });
const { center, sweepFlag, largeArcFlag, start, end } = config;
if (start.equals(end)) throw Error(`Arc must have different start and end points.`);
this._angleStart = import_Vec.Vec.Angle(center, start);
this._angleEnd = import_Vec.Vec.Angle(center, end);
this._radius = import_Vec.Vec.Dist(center, start);
this._measure = (0, import_utils.getArcMeasure)(this._angleStart, this._angleEnd, sweepFlag, largeArcFlag);
this._start = start;
this._end = end;
this._sweepFlag = sweepFlag;
this._largeArcFlag = largeArcFlag;
this._center = center;
}
nearestPoint(point) {
const {
_center,
_measure: measure,
_radius: radius,
_angleEnd: angleEnd,
_angleStart: angleStart,
_start: A,
_end: B
} = this;
const t = (0, import_utils.getPointInArcT)(measure, angleStart, angleEnd, _center.angle(point));
if (t <= 0) return A;
if (t >= 1) return B;
const dx = point.x - _center.x;
const dy = point.y - _center.y;
const len = Math.sqrt(dx * dx + dy * dy);
if (len === 0) return A;
const scale = radius / len;
return new import_Vec.Vec(_center.x + dx * scale, _center.y + dy * scale);
}
hitTestLineSegment(A, B) {
const {
_center,
_radius: radius,
_measure: measure,
_angleStart: angleStart,
_angleEnd: angleEnd
} = this;
const intersection = (0, import_intersect.intersectLineSegmentCircle)(A, B, _center, radius);
if (intersection === null) return false;
return intersection.some((p) => {
const result = (0, import_utils.getPointInArcT)(measure, angleStart, angleEnd, _center.angle(p));
return result >= 0 && result <= 1;
});
}
getVertices() {
const { _center, _measure: measure, length, _radius: radius, _angleStart: angleStart } = this;
const vertices = [];
for (let i = 0, n = (0, import_geometry_constants.getVerticesCountForArcLength)(Math.abs(length)); i < n + 1; i++) {
const t = i / n * measure;
const angle = angleStart + t;
vertices.push((0, import_utils.getPointOnCircle)(_center, radius, angle));
}
return vertices;
}
getSvgPathData(first = true) {
const {
_start: start,
_end: end,
_radius: radius,
_largeArcFlag: largeArcFlag,
_sweepFlag: sweepFlag
} = this;
return `${first ? `M${start.toFixed()}` : ``} A${radius} ${radius} 0 ${largeArcFlag} ${sweepFlag} ${end.toFixed()}`;
}
getLength() {
return Math.abs(this._measure * this._radius);
}
}
//# sourceMappingURL=Arc2d.js.map