@tldraw/editor/dist-esm/lib/primitives/geometry/Arc2d.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../../src/lib/primitives/geometry/Arc2d.ts"],
  "sourcesContent": ["import { Vec, VecLike } from '../Vec'\nimport { intersectLineSegmentCircle } from '../intersect'\nimport { getArcMeasure, getPointInArcT, getPointOnCircle } from '../utils'\nimport { Geometry2d, Geometry2dOptions } from './Geometry2d'\nimport { getVerticesCountForArcLength } from './geometry-constants'\n\n/** @public */\nexport class Arc2d extends Geometry2d {\n\tprivate _center: Vec\n\tprivate _radius: number\n\tprivate _start: Vec\n\tprivate _end: Vec\n\tprivate _largeArcFlag: number\n\tprivate _sweepFlag: number\n\tprivate _measure: number\n\tprivate _angleStart: number\n\tprivate _angleEnd: number\n\n\tconstructor(\n\t\tconfig: Omit<Geometry2dOptions, 'isFilled' | 'isClosed'> & {\n\t\t\tcenter: Vec\n\t\t\tstart: Vec\n\t\t\tend: Vec\n\t\t\tsweepFlag: number\n\t\t\tlargeArcFlag: number\n\t\t}\n\t) {\n\t\tsuper({ ...config, isFilled: false, isClosed: false })\n\t\tconst { center, sweepFlag, largeArcFlag, start, end } = config\n\t\tif (start.equals(end)) throw Error(`Arc must have different start and end points.`)\n\n\t\t// ensure that the start and end are clockwise\n\t\tthis._angleStart = Vec.Angle(center, start)\n\t\tthis._angleEnd = Vec.Angle(center, end)\n\t\tthis._radius = Vec.Dist(center, start)\n\t\tthis._measure = getArcMeasure(this._angleStart, this._angleEnd, sweepFlag, largeArcFlag)\n\n\t\tthis._start = start\n\t\tthis._end = end\n\n\t\tthis._sweepFlag = sweepFlag\n\t\tthis._largeArcFlag = largeArcFlag\n\t\tthis._center = center\n\t}\n\n\tnearestPoint(point: VecLike): Vec {\n\t\tconst {\n\t\t\t_center,\n\t\t\t_measure: measure,\n\t\t\t_radius: radius,\n\t\t\t_angleEnd: angleEnd,\n\t\t\t_angleStart: angleStart,\n\t\t\t_start: A,\n\t\t\t_end: B,\n\t\t} = this\n\t\tconst t = getPointInArcT(measure, angleStart, angleEnd, _center.angle(point))\n\t\tif (t <= 0) return A\n\t\tif (t >= 1) return B\n\n\t\t// Get the point (P) on the arc, then pick the nearest of A, B, and P\n\t\tconst P = Vec.Sub(point, _center).uni().mul(radius).add(_center)\n\n\t\tlet nearest: Vec | undefined\n\t\tlet dist = Infinity\n\t\tlet d: number\n\t\tfor (const p of [A, B, P]) {\n\t\t\td = Vec.Dist2(point, p)\n\t\t\tif (d < dist) {\n\t\t\t\tnearest = p\n\t\t\t\tdist = d\n\t\t\t}\n\t\t}\n\t\tif (!nearest) throw Error('nearest point not found')\n\t\treturn nearest\n\t}\n\n\thitTestLineSegment(A: VecLike, B: VecLike): boolean {\n\t\tconst {\n\t\t\t_center,\n\t\t\t_radius: radius,\n\t\t\t_measure: measure,\n\t\t\t_angleStart: angleStart,\n\t\t\t_angleEnd: angleEnd,\n\t\t} = this\n\t\tconst intersection = intersectLineSegmentCircle(A, B, _center, radius)\n\t\tif (intersection === null) return false\n\n\t\treturn intersection.some((p) => {\n\t\t\tconst result = getPointInArcT(measure, angleStart, angleEnd, _center.angle(p))\n\t\t\treturn result >= 0 && result <= 1\n\t\t})\n\t}\n\n\tgetVertices(): Vec[] {\n\t\tconst { _center, _measure: measure, length, _radius: radius, _angleStart: angleStart } = this\n\t\tconst vertices: Vec[] = []\n\t\tfor (let i = 0, n = getVerticesCountForArcLength(Math.abs(length)); i < n + 1; i++) {\n\t\t\tconst t = (i / n) * measure\n\t\t\tconst angle = angleStart + t\n\t\t\tvertices.push(getPointOnCircle(_center, radius, angle))\n\t\t}\n\t\treturn vertices\n\t}\n\n\tgetSvgPathData(first = true) {\n\t\tconst {\n\t\t\t_start: start,\n\t\t\t_end: end,\n\t\t\t_radius: radius,\n\t\t\t_largeArcFlag: largeArcFlag,\n\t\t\t_sweepFlag: sweepFlag,\n\t\t} = this\n\t\treturn `${first ? `M${start.toFixed()}` : ``} A${radius} ${radius} 0 ${largeArcFlag} ${sweepFlag} ${end.toFixed()}`\n\t}\n\n\toverride getLength() {\n\t\treturn Math.abs(this._measure * this._radius)\n\t}\n}\n"],
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