fabric/dist/src/util/path/index.min.mjs.map

Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.

{"version":3,"file":"index.min.mjs","sources":["../../../../src/util/path/index.ts"],"sourcesContent":["import { cache } from '../../cache';\nimport { config } from '../../config';\nimport { halfPI, PiBy180 } from '../../constants';\nimport type { TMat2D, TRadian, TRectBounds } from '../../typedefs';\nimport { cos } from '../misc/cos';\nimport { multiplyTransformMatrices, transformPoint } from '../misc/matrix';\nimport { sin } from '../misc/sin';\nimport { toFixed } from '../misc/toFixed';\nimport type {\n  TCurveInfo,\n  TComplexPathData,\n  TParsedAbsoluteCubicCurveCommand,\n  TPathSegmentInfo,\n  TPointAngle,\n  TSimpleParsedCommand,\n  TSimplePathData,\n  TPathSegmentCommandInfo,\n  TComplexParsedCommand,\n  TPathSegmentInfoCommon,\n  TEndPathInfo,\n  TParsedArcCommand,\n  TComplexParsedCommandType,\n} from './typedefs';\nimport type { XY } from '../../Point';\nimport { Point } from '../../Point';\nimport { reArcCommandPoints, rePathCommand } from './regex';\nimport { reNum } from '../../parser/constants';\n\n/**\n * Commands that may be repeated\n */\nconst repeatedCommands: Record<string, 'l' | 'L'> = {\n  m: 'l',\n  M: 'L',\n};\n\n/**\n * Convert an arc of a rotated ellipse to a Bezier Curve\n * @param {TRadian} theta1 start of the arc\n * @param {TRadian} theta2 end of the arc\n * @param cosTh cosine of the angle of rotation\n * @param sinTh sine of the angle of rotation\n * @param rx x-axis radius (before rotation)\n * @param ry y-axis radius (before rotation)\n * @param cx1 center x of the ellipse\n * @param cy1 center y of the ellipse\n * @param mT\n * @param fromX starting point of arc x\n * @param fromY starting point of arc y\n */\nconst segmentToBezier = (\n  theta1: TRadian,\n  theta2: TRadian,\n  cosTh: number,\n  sinTh: number,\n  rx: number,\n  ry: number,\n  cx1: number,\n  cy1: number,\n  mT: number,\n  fromX: number,\n  fromY: number,\n): TParsedAbsoluteCubicCurveCommand => {\n  const costh1 = cos(theta1),\n    sinth1 = sin(theta1),\n    costh2 = cos(theta2),\n    sinth2 = sin(theta2),\n    toX = cosTh * rx * costh2 - sinTh * ry * sinth2 + cx1,\n    toY = sinTh * rx * costh2 + cosTh * ry * sinth2 + cy1,\n    cp1X = fromX + mT * (-cosTh * rx * sinth1 - sinTh * ry * costh1),\n    cp1Y = fromY + mT * (-sinTh * rx * sinth1 + cosTh * ry * costh1),\n    cp2X = toX + mT * (cosTh * rx * sinth2 + sinTh * ry * costh2),\n    cp2Y = toY + mT * (sinTh * rx * sinth2 - cosTh * ry * costh2);\n\n  return ['C', cp1X, cp1Y, cp2X, cp2Y, toX, toY];\n};\n\n/**\n * Adapted from {@link http://dxr.mozilla.org/mozilla-central/source/dom/svg/SVGPathDataParser.cpp}\n * by Andrea Bogazzi code is under MPL. if you don't have a copy of the license you can take it here\n * http://mozilla.org/MPL/2.0/\n * @param toX\n * @param toY\n * @param rx\n * @param ry\n * @param {number} large 0 or 1 flag\n * @param {number} sweep 0 or 1 flag\n * @param rotateX\n */\nconst arcToSegments = (\n  toX: number,\n  toY: number,\n  rx: number,\n  ry: number,\n  large: number,\n  sweep: number,\n  rotateX: TRadian,\n): TParsedAbsoluteCubicCurveCommand[] => {\n  if (rx === 0 || ry === 0) {\n    return [];\n  }\n  let fromX = 0,\n    fromY = 0,\n    root = 0;\n  const PI = Math.PI,\n    theta = rotateX * PiBy180,\n    sinTheta = sin(theta),\n    cosTh = cos(theta),\n    px = 0.5 * (-cosTh * toX - sinTheta * toY),\n    py = 0.5 * (-cosTh * toY + sinTheta * toX),\n    rx2 = rx ** 2,\n    ry2 = ry ** 2,\n    py2 = py ** 2,\n    px2 = px ** 2,\n    pl = rx2 * ry2 - rx2 * py2 - ry2 * px2;\n  let _rx = Math.abs(rx);\n  let _ry = Math.abs(ry);\n\n  if (pl < 0) {\n    const s = Math.sqrt(1 - pl / (rx2 * ry2));\n    _rx *= s;\n    _ry *= s;\n  } else {\n    root =\n      (large === sweep ? -1.0 : 1.0) * Math.sqrt(pl / (rx2 * py2 + ry2 * px2));\n  }\n\n  const cx = (root * _rx * py) / _ry,\n    cy = (-root * _ry * px) / _rx,\n    cx1 = cosTh * cx - sinTheta * cy + toX * 0.5,\n    cy1 = sinTheta * cx + cosTh * cy + toY * 0.5;\n  let mTheta = calcVectorAngle(1, 0, (px - cx) / _rx, (py - cy) / _ry);\n  let dtheta = calcVectorAngle(\n    (px - cx) / _rx,\n    (py - cy) / _ry,\n    (-px - cx) / _rx,\n    (-py - cy) / _ry,\n  );\n\n  if (sweep === 0 && dtheta > 0) {\n    dtheta -= 2 * PI;\n  } else if (sweep === 1 && dtheta < 0) {\n    dtheta += 2 * PI;\n  }\n\n  // Convert into cubic bezier segments <= 90deg\n  const segments = Math.ceil(Math.abs((dtheta / PI) * 2)),\n    result = [],\n    mDelta = dtheta / segments,\n    mT =\n      ((8 / 3) * Math.sin(mDelta / 4) * Math.sin(mDelta / 4)) /\n      Math.sin(mDelta / 2);\n  let th3 = mTheta + mDelta;\n\n  for (let i = 0; i < segments; i++) {\n    result[i] = segmentToBezier(\n      mTheta,\n      th3,\n      cosTh,\n      sinTheta,\n      _rx,\n      _ry,\n      cx1,\n      cy1,\n      mT,\n      fromX,\n      fromY,\n    );\n    fromX = result[i][5];\n    fromY = result[i][6];\n    mTheta = th3;\n    th3 += mDelta;\n  }\n  return result;\n};\n\n/**\n * @private\n * Calculate the angle between two vectors\n * @param ux u endpoint x\n * @param uy u endpoint y\n * @param vx v endpoint x\n * @param vy v endpoint y\n */\nconst calcVectorAngle = (\n  ux: number,\n  uy: number,\n  vx: number,\n  vy: number,\n): TRadian => {\n  const ta = Math.atan2(uy, ux),\n    tb = Math.atan2(vy, vx);\n  if (tb >= ta) {\n    return tb - ta;\n  } else {\n    return 2 * Math.PI - (ta - tb);\n  }\n};\n\n// functions for the Cubic beizer\n// taken from: https://github.com/konvajs/konva/blob/7.0.5/src/shapes/Path.ts#L350\nconst CB1 = (t: number) => t ** 3;\nconst CB2 = (t: number) => 3 * t ** 2 * (1 - t);\nconst CB3 = (t: number) => 3 * t * (1 - t) ** 2;\nconst CB4 = (t: number) => (1 - t) ** 3;\n\n/**\n * Calculate bounding box of a cubic Bezier curve\n * Taken from http://jsbin.com/ivomiq/56/edit (no credits available)\n * TODO: can we normalize this with the starting points set at 0 and then translated the bbox?\n * @param {number} begx starting point\n * @param {number} begy\n * @param {number} cp1x first control point\n * @param {number} cp1y\n * @param {number} cp2x second control point\n * @param {number} cp2y\n * @param {number} endx end of bezier\n * @param {number} endy\n * @return {TRectBounds} the rectangular bounds\n */\nexport function getBoundsOfCurve(\n  begx: number,\n  begy: number,\n  cp1x: number,\n  cp1y: number,\n  cp2x: number,\n  cp2y: number,\n  endx: number,\n  endy: number,\n): TRectBounds {\n  let argsString: string;\n  if (config.cachesBoundsOfCurve) {\n    // eslint-disable-next-line\n    argsString = [...arguments].join();\n    if (cache.boundsOfCurveCache[argsString]) {\n      return cache.boundsOfCurveCache[argsString];\n    }\n  }\n\n  const sqrt = Math.sqrt,\n    abs = Math.abs,\n    tvalues = [],\n    bounds: [[x: number, y: number], [x: number, y: number]] = [\n      [0, 0],\n      [0, 0],\n    ];\n\n  let b = 6 * begx - 12 * cp1x + 6 * cp2x;\n  let a = -3 * begx + 9 * cp1x - 9 * cp2x + 3 * endx;\n  let c = 3 * cp1x - 3 * begx;\n\n  for (let i = 0; i < 2; ++i) {\n    if (i > 0) {\n      b = 6 * begy - 12 * cp1y + 6 * cp2y;\n      a = -3 * begy + 9 * cp1y - 9 * cp2y + 3 * endy;\n      c = 3 * cp1y - 3 * begy;\n    }\n\n    if (abs(a) < 1e-12) {\n      if (abs(b) < 1e-12) {\n        continue;\n      }\n      const t = -c / b;\n      if (0 < t && t < 1) {\n        tvalues.push(t);\n      }\n      continue;\n    }\n    const b2ac = b * b - 4 * c * a;\n    if (b2ac < 0) {\n      continue;\n    }\n    const sqrtb2ac = sqrt(b2ac);\n    const t1 = (-b + sqrtb2ac) / (2 * a);\n    if (0 < t1 && t1 < 1) {\n      tvalues.push(t1);\n    }\n    const t2 = (-b - sqrtb2ac) / (2 * a);\n    if (0 < t2 && t2 < 1) {\n      tvalues.push(t2);\n    }\n  }\n\n  let j = tvalues.length;\n  const jlen = j;\n  const iterator = getPointOnCubicBezierIterator(\n    begx,\n    begy,\n    cp1x,\n    cp1y,\n    cp2x,\n    cp2y,\n    endx,\n    endy,\n  );\n  while (j--) {\n    const { x, y } = iterator(tvalues[j]);\n    bounds[0][j] = x;\n    bounds[1][j] = y;\n  }\n\n  bounds[0][jlen] = begx;\n  bounds[1][jlen] = begy;\n  bounds[0][jlen + 1] = endx;\n  bounds[1][jlen + 1] = endy;\n  const result: TRectBounds = [\n    new Point(Math.min(...bounds[0]), Math.min(...bounds[1])),\n    new Point(Math.max(...bounds[0]), Math.max(...bounds[1])),\n  ];\n  if (config.cachesBoundsOfCurve) {\n    cache.boundsOfCurveCache[argsString!] = result;\n  }\n  return result;\n}\n\n/**\n * Converts arc to a bunch of cubic Bezier curves\n * @param {number} fx starting point x\n * @param {number} fy starting point y\n * @param {TParsedArcCommand} coords Arc command\n */\nexport const fromArcToBeziers = (\n  fx: number,\n  fy: number,\n  [_, rx, ry, rot, large, sweep, tx, ty]: TParsedArcCommand,\n): TParsedAbsoluteCubicCurveCommand[] => {\n  const segsNorm = arcToSegments(tx - fx, ty - fy, rx, ry, large, sweep, rot);\n\n  for (let i = 0, len = segsNorm.length; i < len; i++) {\n    segsNorm[i][1] += fx;\n    segsNorm[i][2] += fy;\n    segsNorm[i][3] += fx;\n    segsNorm[i][4] += fy;\n    segsNorm[i][5] += fx;\n    segsNorm[i][6] += fy;\n  }\n  return segsNorm;\n};\n\n/**\n * This function takes a parsed SVG path and makes it simpler for fabricJS logic.\n * Simplification consist of:\n * - All commands converted to absolute (lowercase to uppercase)\n * - S converted to C\n * - T converted to Q\n * - A converted to C\n * @param {TComplexPathData} path the array of commands of a parsed SVG path for `Path`\n * @return {TSimplePathData} the simplified array of commands of a parsed SVG path for `Path`\n * TODO: figure out how to remove the type assertions in a nice way\n */\nexport const makePathSimpler = (path: TComplexPathData): TSimplePathData => {\n  // x and y represent the last point of the path, AKA the previous command point.\n  // we add them to each relative command to make it an absolute comment.\n  // we also swap the v V h H with L, because are easier to transform.\n  let x = 0,\n    y = 0;\n  // x1 and y1 represent the last point of the subpath. the subpath is started with\n  // m or M command. When a z or Z command is drawn, x and y need to be resetted to\n  // the last x1 and y1.\n  let x1 = 0,\n    y1 = 0;\n  // previous will host the letter of the previous command, to handle S and T.\n  // controlX and controlY will host the previous reflected control point\n  const destinationPath: TSimplePathData = [];\n  let previous,\n    // placeholders\n    controlX = 0,\n    controlY = 0;\n  for (const parsedCommand of path) {\n    const current: TComplexParsedCommand = [...parsedCommand];\n    let converted: TSimpleParsedCommand | undefined;\n    switch (\n      current[0] // first letter\n    ) {\n      case 'l': // lineto, relative\n        current[1] += x;\n        current[2] += y;\n      // falls through\n      case 'L':\n        x = current[1];\n        y = current[2];\n        converted = ['L', x, y];\n        break;\n      case 'h': // horizontal lineto, relative\n        current[1] += x;\n      // falls through\n      case 'H':\n        x = current[1];\n        converted = ['L', x, y];\n        break;\n      case 'v': // vertical lineto, relative\n        current[1] += y;\n      // falls through\n      case 'V':\n        y = current[1];\n        converted = ['L', x, y];\n        break;\n      case 'm': // moveTo, relative\n        current[1] += x;\n        current[2] += y;\n      // falls through\n      case 'M':\n        x = current[1];\n        y = current[2];\n        x1 = current[1];\n        y1 = current[2];\n        converted = ['M', x, y];\n        break;\n      case 'c': // bezierCurveTo, relative\n        current[1] += x;\n        current[2] += y;\n        current[3] += x;\n        current[4] += y;\n        current[5] += x;\n        current[6] += y;\n      // falls through\n      case 'C':\n        controlX = current[3];\n        controlY = current[4];\n        x = current[5];\n        y = current[6];\n        converted = ['C', current[1], current[2], controlX, controlY, x, y];\n        break;\n      case 's': // shorthand cubic bezierCurveTo, relative\n        current[1] += x;\n        current[2] += y;\n        current[3] += x;\n        current[4] += y;\n      // falls through\n      case 'S':\n        // would be sScC but since we are swapping sSc for C, we check just that.\n        if (previous === 'C') {\n          // calculate reflection of previous control points\n          controlX = 2 * x - controlX;\n          controlY = 2 * y - controlY;\n        } else {\n          // If there is no previous command or if the previous command was not a C, c, S, or s,\n          // the control point is coincident with the current point\n          controlX = x;\n          controlY = y;\n        }\n        x = current[3];\n        y = current[4];\n        converted = ['C', controlX, controlY, current[1], current[2], x, y];\n        // converted[3] and converted[4] are NOW the second control point.\n        // we keep it for the next reflection.\n        controlX = converted[3];\n        controlY = converted[4];\n        break;\n      case 'q': // quadraticCurveTo, relative\n        current[1] += x;\n        current[2] += y;\n        current[3] += x;\n        current[4] += y;\n      // falls through\n      case 'Q':\n        controlX = current[1];\n        controlY = current[2];\n        x = current[3];\n        y = current[4];\n        converted = ['Q', controlX, controlY, x, y];\n        break;\n      case 't': // shorthand quadraticCurveTo, relative\n        current[1] += x;\n        current[2] += y;\n      // falls through\n      case 'T':\n        if (previous === 'Q') {\n          // calculate reflection of previous control point\n          controlX = 2 * x - controlX;\n          controlY = 2 * y - controlY;\n        } else {\n          // If there is no previous command or if the previous command was not a Q, q, T or t,\n          // assume the control point is coincident with the current point\n          controlX = x;\n          controlY = y;\n        }\n        x = current[1];\n        y = current[2];\n        converted = ['Q', controlX, controlY, x, y];\n        break;\n      case 'a':\n        current[6] += x;\n        current[7] += y;\n      // falls through\n      case 'A':\n        fromArcToBeziers(x, y, current).forEach((b) => destinationPath.push(b));\n        x = current[6];\n        y = current[7];\n        break;\n      case 'z':\n      case 'Z':\n        x = x1;\n        y = y1;\n        converted = ['Z'];\n        break;\n      default:\n    }\n    if (converted) {\n      destinationPath.push(converted);\n      previous = converted[0];\n    } else {\n      previous = '';\n    }\n  }\n  return destinationPath;\n};\n\n// todo verify if we can just use the point class here\n/**\n * Calc length from point x1,y1 to x2,y2\n * @param {number} x1 starting point x\n * @param {number} y1 starting point y\n * @param {number} x2 starting point x\n * @param {number} y2 starting point y\n * @return {number} length of segment\n */\nconst calcLineLength = (\n  x1: number,\n  y1: number,\n  x2: number,\n  y2: number,\n): number => Math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2);\n\n/**\n * Get an iterator that takes a percentage and returns a point\n * @param {number} begx\n * @param {number} begy\n * @param {number} cp1x\n * @param {number} cp1y\n * @param {number} cp2x\n * @param {number} cp2y\n * @param {number} endx\n * @param {number} endy\n */\nconst getPointOnCubicBezierIterator =\n  (\n    begx: number,\n    begy: number,\n    cp1x: number,\n    cp1y: number,\n    cp2x: number,\n    cp2y: number,\n    endx: number,\n    endy: number,\n  ) =>\n  (pct: number) => {\n    const c1 = CB1(pct),\n      c2 = CB2(pct),\n      c3 = CB3(pct),\n      c4 = CB4(pct);\n    return new Point(\n      endx * c1 + cp2x * c2 + cp1x * c3 + begx * c4,\n      endy * c1 + cp2y * c2 + cp1y * c3 + begy * c4,\n    );\n  };\n\nconst QB1 = (t: number) => t ** 2;\nconst QB2 = (t: number) => 2 * t * (1 - t);\nconst QB3 = (t: number) => (1 - t) ** 2;\n\nconst getTangentCubicIterator =\n  (\n    p1x: number,\n    p1y: number,\n    p2x: number,\n    p2y: number,\n    p3x: number,\n    p3y: number,\n    p4x: number,\n    p4y: number,\n  ) =>\n  (pct: number) => {\n    const qb1 = QB1(pct),\n      qb2 = QB2(pct),\n      qb3 = QB3(pct),\n      tangentX =\n        3 * (qb3 * (p2x - p1x) + qb2 * (p3x - p2x) + qb1 * (p4x - p3x)),\n      tangentY =\n        3 * (qb3 * (p2y - p1y) + qb2 * (p3y - p2y) + qb1 * (p4y - p3y));\n    return Math.atan2(tangentY, tangentX);\n  };\n\nconst getPointOnQuadraticBezierIterator =\n  (\n    p1x: number,\n    p1y: number,\n    p2x: number,\n    p2y: number,\n    p3x: number,\n    p3y: number,\n  ) =>\n  (pct: number) => {\n    const c1 = QB1(pct),\n      c2 = QB2(pct),\n      c3 = QB3(pct);\n    return new Point(\n      p3x * c1 + p2x * c2 + p1x * c3,\n      p3y * c1 + p2y * c2 + p1y * c3,\n    );\n  };\n\nconst getTangentQuadraticIterator =\n  (\n    p1x: number,\n    p1y: number,\n    p2x: number,\n    p2y: number,\n    p3x: number,\n    p3y: number,\n  ) =>\n  (pct: number) => {\n    const invT = 1 - pct,\n      tangentX = 2 * (invT * (p2x - p1x) + pct * (p3x - p2x)),\n      tangentY = 2 * (invT * (p2y - p1y) + pct * (p3y - p2y));\n    return Math.atan2(tangentY, tangentX);\n  };\n\n// this will run over a path segment (a cubic or quadratic segment) and approximate it\n// with 100 segments. This will good enough to calculate the length of the curve\nconst pathIterator = (\n  iterator: (pct: number) => Point,\n  x1: number,\n  y1: number,\n) => {\n  let tempP = new Point(x1, y1),\n    tmpLen = 0;\n  for (let perc = 1; perc <= 100; perc += 1) {\n    const p = iterator(perc / 100);\n    tmpLen += calcLineLength(tempP.x, tempP.y, p.x, p.y);\n    tempP = p;\n  }\n  return tmpLen;\n};\n\n/**\n * Given a pathInfo, and a distance in pixels, find the percentage from 0 to 1\n * that correspond to that pixels run over the path.\n * The percentage will be then used to find the correct point on the canvas for the path.\n * @param {Array} segInfo fabricJS collection of information on a parsed path\n * @param {number} distance from starting point, in pixels.\n * @return {TPointAngle} info object with x and y ( the point on canvas ) and angle, the tangent on that point;\n */\nconst findPercentageForDistance = (\n  segInfo: TCurveInfo<'Q' | 'C'>,\n  distance: number,\n): TPointAngle => {\n  let perc = 0,\n    tmpLen = 0,\n    tempP: XY = { x: segInfo.x, y: segInfo.y },\n    p: XY = { ...tempP },\n    nextLen: number,\n    nextStep = 0.01,\n    lastPerc = 0;\n  // nextStep > 0.0001 covers 0.00015625 that 1/64th of 1/100\n  // the path\n  const iterator = segInfo.iterator,\n    angleFinder = segInfo.angleFinder;\n  while (tmpLen < distance && nextStep > 0.0001) {\n    p = iterator(perc);\n    lastPerc = perc;\n    nextLen = calcLineLength(tempP.x, tempP.y, p.x, p.y);\n    // compare tmpLen each cycle with distance, decide next perc to test.\n    if (nextLen + tmpLen > distance) {\n      // we discard this step and we make smaller steps.\n      perc -= nextStep;\n      nextStep /= 2;\n    } else {\n      tempP = p;\n      perc += nextStep;\n      tmpLen += nextLen;\n    }\n  }\n  return { ...p, angle: angleFinder(lastPerc) };\n};\n\n/**\n * Run over a parsed and simplified path and extract some information (length of each command and starting point)\n * @param {TSimplePathData} path parsed path commands\n * @return {TPathSegmentInfo[]} path commands information\n */\nexport const getPathSegmentsInfo = (\n  path: TSimplePathData,\n): TPathSegmentInfo[] => {\n  let totalLength = 0,\n    //x2 and y2 are the coords of segment start\n    //x1 and y1 are the coords of the current point\n    x1 = 0,\n    y1 = 0,\n    x2 = 0,\n    y2 = 0,\n    iterator,\n    tempInfo: TPathSegmentInfo;\n  const info: TPathSegmentInfo[] = [];\n  for (const current of path) {\n    const basicInfo: TPathSegmentInfoCommon<keyof TPathSegmentCommandInfo> = {\n      x: x1,\n      y: y1,\n      command: current[0],\n      length: 0,\n    };\n    switch (\n      current[0] //first letter\n    ) {\n      case 'M':\n        tempInfo = <TPathSegmentInfoCommon<'M'>>basicInfo;\n        tempInfo.x = x2 = x1 = current[1];\n        tempInfo.y = y2 = y1 = current[2];\n        break;\n      case 'L':\n        tempInfo = <TPathSegmentInfoCommon<'L'>>basicInfo;\n        tempInfo.length = calcLineLength(x1, y1, current[1], current[2]);\n        x1 = current[1];\n        y1 = current[2];\n        break;\n      case 'C':\n        iterator = getPointOnCubicBezierIterator(\n          x1,\n          y1,\n          current[1],\n          current[2],\n          current[3],\n          current[4],\n          current[5],\n          current[6],\n        );\n        tempInfo = <TCurveInfo<'C'>>basicInfo;\n        tempInfo.iterator = iterator;\n        tempInfo.angleFinder = getTangentCubicIterator(\n          x1,\n          y1,\n          current[1],\n          current[2],\n          current[3],\n          current[4],\n          current[5],\n          current[6],\n        );\n        tempInfo.length = pathIterator(iterator, x1, y1);\n\n        x1 = current[5];\n        y1 = current[6];\n        break;\n      case 'Q':\n        iterator = getPointOnQuadraticBezierIterator(\n          x1,\n          y1,\n          current[1],\n          current[2],\n          current[3],\n          current[4],\n        );\n        tempInfo = <TCurveInfo<'Q'>>basicInfo;\n        tempInfo.iterator = iterator;\n        tempInfo.angleFinder = getTangentQuadraticIterator(\n          x1,\n          y1,\n          current[1],\n          current[2],\n          current[3],\n          current[4],\n        );\n        tempInfo.length = pathIterator(iterator, x1, y1);\n        x1 = current[3];\n        y1 = current[4];\n        break;\n      case 'Z':\n        // we add those in order to ease calculations later\n        tempInfo = <TEndPathInfo>basicInfo;\n        tempInfo.destX = x2;\n        tempInfo.destY = y2;\n        tempInfo.length = calcLineLength(x1, y1, x2, y2);\n        x1 = x2;\n        y1 = y2;\n        break;\n    }\n    totalLength += tempInfo.length;\n    info.push(tempInfo);\n  }\n  info.push({ length: totalLength, x: x1, y: y1 });\n  return info;\n};\n\n/**\n * Get the point on the path that is distance along the path\n * @param path\n * @param distance\n * @param infos\n 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