js-angusj-clipper
Version:
Polygon and line clipping and offsetting library for Javascript / Typescript - a port of Angus Johnson's clipper to WebAssembly / Asm.JS
296 lines • 36 kB
JavaScript
;
var __values = (this && this.__values) || function(o) {
var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
if (m) return m.call(o);
if (o && typeof o.length === "number") return {
next: function () {
if (o && i >= o.length) o = void 0;
return { value: o && o[i++], done: !o };
}
};
throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.scalePaths = exports.scalePath = exports.simplifyPolygons = exports.simplifyPolygon = exports.reversePaths = exports.reversePath = exports.polyTreeToPaths = exports.pointInPolygon = exports.orientation = exports.openPathsFromPolyTree = exports.minkowskiSumPaths = exports.minkowskiSumPath = exports.minkowskiDiff = exports.closedPathsFromPolyTree = exports.cleanPolygons = exports.cleanPolygon = exports.area = void 0;
var enums_1 = require("./enums");
var nativeEnumConversion_1 = require("./native/nativeEnumConversion");
var PathsToNativePaths_1 = require("./native/PathsToNativePaths");
var PathToNativePath_1 = require("./native/PathToNativePath");
function tryDelete() {
var e_1, _a;
var objs = [];
for (var _i = 0; _i < arguments.length; _i++) {
objs[_i] = arguments[_i];
}
try {
for (var objs_1 = __values(objs), objs_1_1 = objs_1.next(); !objs_1_1.done; objs_1_1 = objs_1.next()) {
var obj = objs_1_1.value;
if (!obj.isDeleted()) {
obj.delete();
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (objs_1_1 && !objs_1_1.done && (_a = objs_1.return)) _a.call(objs_1);
}
finally { if (e_1) throw e_1.error; }
}
}
function area(path) {
// we use JS since copying structures is slower than actually doing it
var cnt = path.length;
if (cnt < 3) {
return 0;
}
var a = 0;
for (var i = 0, j = cnt - 1; i < cnt; ++i) {
a += (path[j].x + path[i].x) * (path[j].y - path[i].y);
j = i;
}
return -a * 0.5;
}
exports.area = area;
function cleanPolygon(nativeLib, path, distance) {
if (distance === void 0) { distance = 1.1415; }
var nativePath = PathToNativePath_1.pathToNativePath(nativeLib, path);
try {
nativeLib.cleanPolygon(nativePath, distance);
return PathToNativePath_1.nativePathToPath(nativeLib, nativePath, true); // frees nativePath
}
finally {
tryDelete(nativePath);
}
}
exports.cleanPolygon = cleanPolygon;
function cleanPolygons(nativeLib, paths, distance) {
if (distance === void 0) { distance = 1.1415; }
var nativePaths = PathsToNativePaths_1.pathsToNativePaths(nativeLib, paths);
try {
nativeLib.cleanPolygons(nativePaths, distance);
return PathsToNativePaths_1.nativePathsToPaths(nativeLib, nativePaths, true); // frees nativePath
}
finally {
tryDelete(nativePaths);
}
}
exports.cleanPolygons = cleanPolygons;
function addPolyNodeToPaths(polynode, nt, paths) {
var match = true;
switch (nt) {
case 1 /* Open */:
return;
case 2 /* Closed */:
match = !polynode.isOpen;
break;
default:
break;
}
if (polynode.contour.length > 0 && match) {
paths.push(polynode.contour);
}
for (var ii = 0, max = polynode.childs.length; ii < max; ii++) {
var pn = polynode.childs[ii];
addPolyNodeToPaths(pn, nt, paths);
}
}
function closedPathsFromPolyTree(polyTree) {
// we do this in JS since copying path is more expensive than just doing it
var result = [];
// result.Capacity = polytree.Total;
addPolyNodeToPaths(polyTree, 2 /* Closed */, result);
return result;
}
exports.closedPathsFromPolyTree = closedPathsFromPolyTree;
function minkowskiDiff(nativeLib, poly1, poly2) {
var nativePath1 = PathToNativePath_1.pathToNativePath(nativeLib, poly1);
var nativePath2 = PathToNativePath_1.pathToNativePath(nativeLib, poly2);
var outNativePaths = new nativeLib.Paths();
try {
nativeLib.minkowskiDiff(nativePath1, nativePath2, outNativePaths);
tryDelete(nativePath1, nativePath2);
return PathsToNativePaths_1.nativePathsToPaths(nativeLib, outNativePaths, true); // frees outNativePaths
}
finally {
tryDelete(nativePath1, nativePath2, outNativePaths);
}
}
exports.minkowskiDiff = minkowskiDiff;
function minkowskiSumPath(nativeLib, pattern, path, pathIsClosed) {
var patternNativePath = PathToNativePath_1.pathToNativePath(nativeLib, pattern);
var nativePath = PathToNativePath_1.pathToNativePath(nativeLib, path);
var outNativePaths = new nativeLib.Paths();
try {
nativeLib.minkowskiSumPath(patternNativePath, nativePath, outNativePaths, pathIsClosed);
tryDelete(patternNativePath, nativePath);
return PathsToNativePaths_1.nativePathsToPaths(nativeLib, outNativePaths, true); // frees outNativePaths
}
finally {
tryDelete(patternNativePath, nativePath, outNativePaths);
}
}
exports.minkowskiSumPath = minkowskiSumPath;
function minkowskiSumPaths(nativeLib, pattern, paths, pathIsClosed) {
// TODO: im not sure if for this method we can reuse the input/output path
var patternNativePath = PathToNativePath_1.pathToNativePath(nativeLib, pattern);
var nativePaths = PathsToNativePaths_1.pathsToNativePaths(nativeLib, paths);
try {
nativeLib.minkowskiSumPaths(patternNativePath, nativePaths, nativePaths, pathIsClosed);
tryDelete(patternNativePath);
return PathsToNativePaths_1.nativePathsToPaths(nativeLib, nativePaths, true); // frees nativePaths
}
finally {
tryDelete(patternNativePath, nativePaths);
}
}
exports.minkowskiSumPaths = minkowskiSumPaths;
function openPathsFromPolyTree(polyTree) {
// we do this in JS since copying path is more expensive than just doing it
var result = [];
var len = polyTree.childs.length;
result.length = len;
var resultLength = 0;
for (var i = 0; i < len; i++) {
if (polyTree.childs[i].isOpen) {
result[resultLength++] = polyTree.childs[i].contour;
}
}
result.length = resultLength;
return result;
}
exports.openPathsFromPolyTree = openPathsFromPolyTree;
function orientation(path) {
return area(path) >= 0;
}
exports.orientation = orientation;
function pointInPolygon(point, path) {
// we do this in JS since copying path is more expensive than just doing it
// returns 0 if false, +1 if true, -1 if pt ON polygon boundary
// See "The Point in Polygon Problem for Arbitrary Polygons" by Hormann & Agathos
// http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.88.5498&rep=rep1&type=pdf
var result = 0;
var cnt = path.length;
if (cnt < 3) {
return 0;
}
var ip = path[0];
for (var i = 1; i <= cnt; ++i) {
var ipNext = i === cnt ? path[0] : path[i];
if (ipNext.y === point.y) {
if (ipNext.x === point.x || (ip.y === point.y && ipNext.x > point.x === ip.x < point.x)) {
return -1;
}
}
if (ip.y < point.y !== ipNext.y < point.y) {
if (ip.x >= point.x) {
if (ipNext.x > point.x) {
result = 1 - result;
}
else {
var d = (ip.x - point.x) * (ipNext.y - point.y) - (ipNext.x - point.x) * (ip.y - point.y);
if (d === 0) {
return -1;
}
else if (d > 0 === ipNext.y > ip.y) {
result = 1 - result;
}
}
}
else {
if (ipNext.x > point.x) {
var d = (ip.x - point.x) * (ipNext.y - point.y) - (ipNext.x - point.x) * (ip.y - point.y);
if (d === 0) {
return -1;
}
else if (d > 0 === ipNext.y > ip.y) {
result = 1 - result;
}
}
}
}
ip = ipNext;
}
return result;
}
exports.pointInPolygon = pointInPolygon;
function polyTreeToPaths(polyTree) {
// we do this in JS since copying path is more expensive than just doing it
var result = [];
// result.Capacity = polytree.total;
addPolyNodeToPaths(polyTree, 0 /* Any */, result);
return result;
}
exports.polyTreeToPaths = polyTreeToPaths;
function reversePath(path) {
// we use JS since copying structures is slower than actually doing it
path.reverse();
}
exports.reversePath = reversePath;
function reversePaths(paths) {
// we use JS since copying structures is slower than actually doing it
for (var i = 0, max = paths.length; i < max; i++) {
reversePath(paths[i]);
}
}
exports.reversePaths = reversePaths;
function simplifyPolygon(nativeLib, path, fillType) {
if (fillType === void 0) { fillType = enums_1.PolyFillType.EvenOdd; }
var nativePath = PathToNativePath_1.pathToNativePath(nativeLib, path);
var outNativePaths = new nativeLib.Paths();
try {
nativeLib.simplifyPolygon(nativePath, outNativePaths, nativeEnumConversion_1.polyFillTypeToNative(nativeLib, fillType));
tryDelete(nativePath);
return PathsToNativePaths_1.nativePathsToPaths(nativeLib, outNativePaths, true); // frees outNativePaths
}
finally {
tryDelete(nativePath, outNativePaths);
}
}
exports.simplifyPolygon = simplifyPolygon;
function simplifyPolygons(nativeLib, paths, fillType) {
if (fillType === void 0) { fillType = enums_1.PolyFillType.EvenOdd; }
var nativePaths = PathsToNativePaths_1.pathsToNativePaths(nativeLib, paths);
try {
nativeLib.simplifyPolygonsOverwrite(nativePaths, nativeEnumConversion_1.polyFillTypeToNative(nativeLib, fillType));
return PathsToNativePaths_1.nativePathsToPaths(nativeLib, nativePaths, true); // frees nativePaths
}
finally {
tryDelete(nativePaths);
}
}
exports.simplifyPolygons = simplifyPolygons;
function scalePath(path, scale) {
var sol = [];
var i = path.length;
while (i--) {
var p = path[i];
sol.push({
x: Math.round(p.x * scale),
y: Math.round(p.y * scale)
});
}
return sol;
}
exports.scalePath = scalePath;
/**
* Scales all inner paths by multiplying all its coordinates by a number and then rounding them.
*
* @param paths - Paths to scale
* @param scale - Scale multiplier
* @return {Paths} - The scaled paths
*/
function scalePaths(paths, scale) {
if (scale === 0) {
return [];
}
var sol = [];
var i = paths.length;
while (i--) {
var p = paths[i];
sol.push(scalePath(p, scale));
}
return sol;
}
exports.scalePaths = scalePaths;
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{ PointInPolygonResult, PolyFillType } from \"./enums\";\r\nimport { IntPoint } from \"./IntPoint\";\r\nimport { NativeClipperLibInstance } from \"./native/NativeClipperLibInstance\";\r\nimport { NativeDeletable } from \"./native/NativeDeletable\";\r\nimport { polyFillTypeToNative } from \"./native/nativeEnumConversion\";\r\nimport { nativePathsToPaths, pathsToNativePaths } from \"./native/PathsToNativePaths\";\r\nimport { nativePathToPath, pathToNativePath } from \"./native/PathToNativePath\";\r\nimport { Path, ReadonlyPath } from \"./Path\";\r\nimport { Paths, ReadonlyPaths } from \"./Paths\";\r\nimport { PolyNode } from \"./PolyNode\";\r\nimport { PolyTree } from \"./PolyTree\";\r\n\r\nfunction tryDelete(...objs: NativeDeletable[]) {\r\n  for (const obj of objs) {\r\n    if (!obj.isDeleted()) {\r\n      obj.delete();\r\n    }\r\n  }\r\n}\r\n\r\nexport function area(path: ReadonlyPath): number {\r\n  // we use JS since copying structures is slower than actually doing it\r\n  const cnt = path.length;\r\n  if (cnt < 3) {\r\n    return 0;\r\n  }\r\n  let a = 0;\r\n  for (let i = 0, j = cnt - 1; i < cnt; ++i) {\r\n    a += (path[j].x + path[i].x) * (path[j].y - path[i].y);\r\n    j = i;\r\n  }\r\n  return -a * 0.5;\r\n}\r\n\r\nexport function cleanPolygon(\r\n  nativeLib: NativeClipperLibInstance,\r\n  path: ReadonlyPath,\r\n  distance = 1.1415\r\n): Path {\r\n  const nativePath = pathToNativePath(nativeLib, path);\r\n  try {\r\n    nativeLib.cleanPolygon(nativePath, distance);\r\n    return nativePathToPath(nativeLib, nativePath, true); // frees nativePath\r\n  } finally {\r\n    tryDelete(nativePath);\r\n  }\r\n}\r\n\r\nexport function cleanPolygons(\r\n  nativeLib: NativeClipperLibInstance,\r\n  paths: ReadonlyPaths,\r\n  distance = 1.1415\r\n): Paths {\r\n  const nativePaths = pathsToNativePaths(nativeLib, paths);\r\n  try {\r\n    nativeLib.cleanPolygons(nativePaths, distance);\r\n    return nativePathsToPaths(nativeLib, nativePaths, true); // frees nativePath\r\n  } finally {\r\n    tryDelete(nativePaths);\r\n  }\r\n}\r\n\r\nconst enum NodeType {\r\n  Any,\r\n  Open,\r\n  Closed\r\n}\r\n\r\nfunction addPolyNodeToPaths(polynode: PolyNode, nt: NodeType, paths: ReadonlyPath[]): void {\r\n  let match = true;\r\n  switch (nt) {\r\n    case NodeType.Open:\r\n      return;\r\n    case NodeType.Closed:\r\n      match = !polynode.isOpen;\r\n      break;\r\n    default:\r\n      break;\r\n  }\r\n\r\n  if (polynode.contour.length > 0 && match) {\r\n    paths.push(polynode.contour);\r\n  }\r\n  for (let ii = 0, max = polynode.childs.length; ii < max; ii++) {\r\n    const pn = polynode.childs[ii];\r\n    addPolyNodeToPaths(pn, nt, paths);\r\n  }\r\n}\r\n\r\nexport function closedPathsFromPolyTree(polyTree: PolyTree): Paths {\r\n  // we do this in JS since copying path is more expensive than just doing it\r\n\r\n  const result: Paths = [];\r\n  // result.Capacity = polytree.Total;\r\n  addPolyNodeToPaths(polyTree, NodeType.Closed, result);\r\n  return result;\r\n}\r\n\r\nexport function minkowskiDiff(\r\n  nativeLib: NativeClipperLibInstance,\r\n  poly1: ReadonlyPath,\r\n  poly2: ReadonlyPath\r\n): Paths {\r\n  const nativePath1 = pathToNativePath(nativeLib, poly1);\r\n  const nativePath2 = pathToNativePath(nativeLib, poly2);\r\n  const outNativePaths = new nativeLib.Paths();\r\n\r\n  try {\r\n    nativeLib.minkowskiDiff(nativePath1, nativePath2, outNativePaths);\r\n    tryDelete(nativePath1, nativePath2);\r\n    return nativePathsToPaths(nativeLib, outNativePaths, true); // frees outNativePaths\r\n  } finally {\r\n    tryDelete(nativePath1, nativePath2, outNativePaths);\r\n  }\r\n}\r\n\r\nexport function minkowskiSumPath(\r\n  nativeLib: NativeClipperLibInstance,\r\n  pattern: ReadonlyPath,\r\n  path: ReadonlyPath,\r\n  pathIsClosed: boolean\r\n): Paths {\r\n  const patternNativePath = pathToNativePath(nativeLib, pattern);\r\n  const nativePath = pathToNativePath(nativeLib, path);\r\n  const outNativePaths = new nativeLib.Paths();\r\n\r\n  try {\r\n    nativeLib.minkowskiSumPath(patternNativePath, nativePath, outNativePaths, pathIsClosed);\r\n    tryDelete(patternNativePath, nativePath);\r\n    return nativePathsToPaths(nativeLib, outNativePaths, true); // frees outNativePaths\r\n  } finally {\r\n    tryDelete(patternNativePath, nativePath, outNativePaths);\r\n  }\r\n}\r\n\r\nexport function minkowskiSumPaths(\r\n  nativeLib: NativeClipperLibInstance,\r\n  pattern: ReadonlyPath,\r\n  paths: ReadonlyPaths,\r\n  pathIsClosed: boolean\r\n): Paths {\r\n  // TODO: im not sure if for this method we can reuse the input/output path\r\n\r\n  const patternNativePath = pathToNativePath(nativeLib, pattern);\r\n  const nativePaths = pathsToNativePaths(nativeLib, paths);\r\n\r\n  try {\r\n    nativeLib.minkowskiSumPaths(patternNativePath, nativePaths, nativePaths, pathIsClosed);\r\n    tryDelete(patternNativePath);\r\n    return nativePathsToPaths(nativeLib, nativePaths, true); // frees nativePaths\r\n  } finally {\r\n    tryDelete(patternNativePath, nativePaths);\r\n  }\r\n}\r\n\r\nexport function openPathsFromPolyTree(polyTree: PolyTree): ReadonlyPath[] {\r\n  // we do this in JS since copying path is more expensive than just doing it\r\n\r\n  const result = [];\r\n  const len = polyTree.childs.length;\r\n  result.length = len;\r\n  let resultLength = 0;\r\n  for (let i = 0; i < len; i++) {\r\n    if (polyTree.childs[i].isOpen) {\r\n      result[resultLength++] = polyTree.childs[i].contour;\r\n    }\r\n  }\r\n  result.length = resultLength;\r\n  return result;\r\n}\r\n\r\nexport function orientation(path: ReadonlyPath): boolean {\r\n  return area(path) >= 0;\r\n}\r\n\r\nexport function pointInPolygon(\r\n  point: Readonly<IntPoint>,\r\n  path: ReadonlyPath\r\n): PointInPolygonResult {\r\n  // we do this in JS since copying path is more expensive than just doing it\r\n\r\n  // returns 0 if false, +1 if true, -1 if pt ON polygon boundary\r\n  // See \"The Point in Polygon Problem for Arbitrary Polygons\" by Hormann & Agathos\r\n  // http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.88.5498&rep=rep1&type=pdf\r\n  let result = 0;\r\n  const cnt = path.length;\r\n  if (cnt < 3) {\r\n    return 0;\r\n  }\r\n  let ip = path[0];\r\n  for (let i = 1; i <= cnt; ++i) {\r\n    const ipNext = i === cnt ? path[0] : path[i];\r\n    if (ipNext.y === point.y) {\r\n      if (ipNext.x === point.x || (ip.y === point.y && ipNext.x > point.x === ip.x < point.x)) {\r\n        return -1;\r\n      }\r\n    }\r\n    if (ip.y < point.y !== ipNext.y < point.y) {\r\n      if (ip.x >= point.x) {\r\n        if (ipNext.x > point.x) {\r\n          result = 1 - result;\r\n        } else {\r\n          const d =\r\n            (ip.x - point.x) * (ipNext.y - point.y) - (ipNext.x - point.x) * (ip.y - point.y);\r\n          if (d === 0) {\r\n            return -1;\r\n          } else if (d > 0 === ipNext.y > ip.y) {\r\n            result = 1 - result;\r\n          }\r\n        }\r\n      } else {\r\n        if (ipNext.x > point.x) {\r\n          const d =\r\n            (ip.x - point.x) * (ipNext.y - point.y) - (ipNext.x - point.x) * (ip.y - point.y);\r\n          if (d === 0) {\r\n            return -1;\r\n          } else if (d > 0 === ipNext.y > ip.y) {\r\n            result = 1 - result;\r\n          }\r\n        }\r\n      }\r\n    }\r\n    ip = ipNext;\r\n  }\r\n  return result;\r\n}\r\n\r\nexport function polyTreeToPaths(polyTree: PolyTree): Paths {\r\n  // we do this in JS since copying path is more expensive than just doing it\r\n\r\n  const result: Paths = [];\r\n  // result.Capacity = polytree.total;\r\n  addPolyNodeToPaths(polyTree, NodeType.Any, result);\r\n  return result;\r\n}\r\n\r\nexport function reversePath(path: Path): void {\r\n  // we use JS since copying structures is slower than actually doing it\r\n  path.reverse();\r\n}\r\n\r\nexport function reversePaths(paths: Paths): void {\r\n  // we use JS since copying structures is slower than actually doing it\r\n  for (let i = 0, max = paths.length; i < max; i++) {\r\n    reversePath(paths[i]);\r\n  }\r\n}\r\n\r\nexport function simplifyPolygon(\r\n  nativeLib: NativeClipperLibInstance,\r\n  path: ReadonlyPath,\r\n  fillType: PolyFillType = PolyFillType.EvenOdd\r\n): Paths {\r\n  const nativePath = pathToNativePath(nativeLib, path);\r\n  const outNativePaths = new nativeLib.Paths();\r\n  try {\r\n    nativeLib.simplifyPolygon(\r\n      nativePath,\r\n      outNativePaths,\r\n      polyFillTypeToNative(nativeLib, fillType)\r\n    );\r\n    tryDelete(nativePath);\r\n    return nativePathsToPaths(nativeLib, outNativePaths, true); // frees outNativePaths\r\n  } finally {\r\n    tryDelete(nativePath, outNativePaths);\r\n  }\r\n}\r\n\r\nexport function simplifyPolygons(\r\n  nativeLib: NativeClipperLibInstance,\r\n  paths: ReadonlyPaths,\r\n  fillType: PolyFillType = PolyFillType.EvenOdd\r\n): Paths {\r\n  const nativePaths = pathsToNativePaths(nativeLib, paths);\r\n  try {\r\n    nativeLib.simplifyPolygonsOverwrite(nativePaths, polyFillTypeToNative(nativeLib, fillType));\r\n    return nativePathsToPaths(nativeLib, nativePaths, true); // frees nativePaths\r\n  } finally {\r\n    tryDelete(nativePaths);\r\n  }\r\n}\r\n\r\nexport function scalePath(path: ReadonlyPath, scale: number): Path {\r\n  const sol: Path = [];\r\n  let i = path.length;\r\n  while (i--) {\r\n    const p = path[i];\r\n    sol.push({\r\n      x: Math.round(p.x * scale),\r\n      y: Math.round(p.y * scale)\r\n    });\r\n  }\r\n  return sol;\r\n}\r\n\r\n/**\r\n * Scales all inner paths by multiplying all its coordinates by a number and then rounding them.\r\n *\r\n * @param paths - Paths to scale\r\n * @param scale - Scale multiplier\r\n * @return {Paths} - The scaled paths\r\n */\r\nexport function scalePaths(paths: ReadonlyPaths, scale: number): Paths {\r\n  if (scale === 0) {\r\n    return [];\r\n  }\r\n\r\n  const sol: Paths = [];\r\n  let i = paths.length;\r\n  while (i--) {\r\n    const p = paths[i];\r\n    sol.push(scalePath(p, scale));\r\n  }\r\n  return sol;\r\n}\r\n"]}