@tldraw/editor/dist-esm/lib/primitives/geometry/Ellipse2d.mjs.map

tldraw infinite canvas SDK (editor).

{
  "version": 3,
  "sources": ["../../../../src/lib/primitives/geometry/Ellipse2d.ts"],
  "sourcesContent": ["import { Box } from '../Box'\nimport { Vec, VecLike } from '../Vec'\nimport { PI, PI2, clamp, perimeterOfEllipse } from '../utils'\nimport { Edge2d } from './Edge2d'\nimport { Geometry2d, Geometry2dOptions } from './Geometry2d'\nimport { getVerticesCountForArcLength } from './geometry-constants'\n\n/** @public */\nexport class Ellipse2d extends Geometry2d {\n\tprivate _w: number\n\tprivate _h: number\n\tprivate _edges?: Edge2d[]\n\n\tconstructor(\n\t\tpublic config: Omit<Geometry2dOptions, 'isClosed'> & {\n\t\t\twidth: number\n\t\t\theight: number\n\t\t}\n\t) {\n\t\tsuper({ ...config, isClosed: true })\n\t\tconst { width, height } = config\n\t\tthis._w = width\n\t\tthis._h = height\n\t}\n\n\t// eslint-disable-next-line no-restricted-syntax\n\tget edges() {\n\t\tif (!this._edges) {\n\t\t\tconst { vertices } = this\n\t\t\tthis._edges = []\n\t\t\tfor (let i = 0, n = vertices.length; i < n; i++) {\n\t\t\t\tconst start = vertices[i]\n\t\t\t\tconst end = vertices[(i + 1) % n]\n\t\t\t\tthis._edges.push(new Edge2d({ start, end }))\n\t\t\t}\n\t\t}\n\n\t\treturn this._edges\n\t}\n\n\tgetVertices() {\n\t\t// Perimeter of the ellipse\n\t\tconst w = Math.max(1, this._w)\n\t\tconst h = Math.max(1, this._h)\n\t\tconst cx = w / 2\n\t\tconst cy = h / 2\n\t\tconst q = Math.pow(cx - cy, 2) / Math.pow(cx + cy, 2)\n\t\tconst p = PI * (cx + cy) * (1 + (3 * q) / (10 + Math.sqrt(4 - 3 * q)))\n\t\t// Number of points\n\t\tconst len = getVerticesCountForArcLength(p)\n\t\t// Size of step\n\t\tconst step = PI2 / len\n\n\t\tconst a = Math.cos(step)\n\t\tconst b = Math.sin(step)\n\n\t\tlet sin = 0\n\t\tlet cos = 1\n\t\tlet ts = 0\n\t\tlet tc = 1\n\n\t\tconst vertices = Array(len)\n\n\t\tfor (let i = 0; i < len; i++) {\n\t\t\tvertices[i] = new Vec(clamp(cx + cx * cos, 0, w), clamp(cy + cy * sin, 0, h))\n\t\t\tts = b * cos + a * sin\n\t\t\ttc = a * cos - b * sin\n\t\t\tsin = ts\n\t\t\tcos = tc\n\t\t}\n\n\t\treturn vertices\n\t}\n\n\tnearestPoint(A: VecLike): Vec {\n\t\tlet nearest: Vec | undefined\n\t\tlet dist = Infinity\n\t\tlet d: number\n\t\tlet p: Vec\n\t\tfor (const edge of this.edges) {\n\t\t\tp = edge.nearestPoint(A)\n\t\t\td = Vec.Dist2(p, A)\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\treturn this.edges.some((edge) => edge.hitTestLineSegment(A, B))\n\t}\n\n\tgetBounds() {\n\t\treturn new Box(0, 0, this._w, this._h)\n\t}\n\n\tgetLength(): number {\n\t\tconst { _w: w, _h: h } = this\n\t\tconst cx = w / 2\n\t\tconst cy = h / 2\n\t\tconst rx = Math.max(0, cx)\n\t\tconst ry = Math.max(0, cy)\n\t\treturn perimeterOfEllipse(rx, ry)\n\t}\n\n\tgetSvgPathData(first = false) {\n\t\tconst { _w: w, _h: h } = this\n\t\tconst cx = w / 2\n\t\tconst cy = h / 2\n\t\tconst rx = Math.max(0, cx)\n\t\tconst ry = Math.max(0, cy)\n\t\treturn `${first ? `M${cx - rx},${cy}` : ``} a${rx},${ry},0,1,1,${rx * 2},0a${rx},${ry},0,1,1,-${rx * 2},0`\n\t}\n}\n"],
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  "names": []
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