A JavaScript library to perform boolean operations (union, difference etc...) between two SVG paths.

Online demo : http://delapouite.github.io/JsClipper/demo.html

Original : http://sourceforge.net/projects/jsclipper

v6.1.3.2 (1 February 2014)

• Update: Unnecessary closures removed around ref/out calls and major speedup and code cleanliness achieved. Intersection operation speedup in newest Chrome is 2.3x (from 2530 ms to 1107 ms) and in newest Firefox 1.7x (from 7186 ms to 4164 ms).

v6.1.3.1 (21 January 2014)

• Fixed potential endless loop condition when adding open paths to Clipper.
• Added PointInPolygon function.
• Overloaded MinkowskiSum function to accommodate multi-contour paths.

v6.1.2.1 (15 December 2013)

• Minor improvement to joining polygons.

v6.1.1.1 (13 December 2013)

• Fixed a couple of bugs affecting open paths that could raise unhandled exceptions.
• Fixed Uncaught ReferenceError: DistanceFromLineSqrd is not defined when using CleanPolygon or CleanPolygons
• Fixed SimplifyPolygon calls in Main Demo

v6.1.0.1 (12 December 2013)

• Added: Info and Examples page: http://jsclipper.sourceforge.net/6.1.0.1/
• Added: Clipper 6 documentation in https://sourceforge.net/p/jsclipper/wiki/documentation/
• Migration guide for Clipper 5 users in https://sourceforge.net/p/jsclipper/wiki/migration5to6/
• Modified: To accommodate open paths, several functions have been renamed: Polygon -> Path Polygons -> Paths AddPolygon -> AddPath AddPolygons -> AddPaths PolyTreeToPolygons -> PolyTreeToPaths ReversePolygons -> ReversePaths
• Modified: OffsetPolygons function is replaced by ClipperOffset class, which is much more flexible. There is also now deprecated OffsetPaths function, which may be removed in future update.
• Update: ExPolygons has been replaced with the PolyTree & PolyNode classes to more fully represent the parent-child relationships of the polygons returned by Clipper. There is for backward compatibility ClipperLib.JS.PolyTreeToExPolygons.
• Added: Open path (polyline) clipping.
• Update: Major improvement in the merging of shared/collinear edges in clip solutions (see Execute).
• Added: The IntPoint structure now has an optional 'Z' member. (See the precompiler directive use_xyz.)
• Added: New CleanPolygon and CleanPolygons functions.
• Added: MinkowskiSum and MinkowskiDiff functions added.
• Added: Several other new functions have been added including PolyTreeToPaths, OpenPathsFromPolyTree and ClosedPathsFromPolyTree.
• Added: ReverseSolution, PreserveCollinear and StrictlySimple properties to Clipper class
• Added: The Clipper constructor now accepts an optional InitOptions parameter to simplify setting properties.
• Modified: The Clipper class has a new ZFillFunction property.
• Deprecated: Version 6 is a major upgrade from previous versions and quite a number of changes have been made to exposed structures and functions. To minimize inconvenience to existing library users, some code has been retained and some added to maintain backward compatibility. However, because this code will be removed in a future update, it has been marked as deprecated and a precompiler directive use_deprecated has been defined.
• Changed: The behaviour of the 'miter' JoinType has been changed so that when squaring occurs, it's no longer extended up to the miter limit but is squared off at exactly 'delta' units. (This improves the look of mitering with larger limits at acute angles.)
• Bugfixes: Several minor bugs have been fixed including occasionally an incorrect nesting within the PolyTree structure.

5.0.2.1 - 12 January 2013

• Update: Clipper library updated to version 5.0.2. The Area algorithm has been updated and is faster. 'CheckInputs' parameter of the OffsetPolygons function has been renamed 'AutoFix'.
• Added: ClipperLib.Clean(), which removes too near vertices to avoid micro-self-intersection-artifacts when offsetting.
• Added: ClipperLib.Lighten(), which reduces count of vertices using perpendicular distance reduction algorithm.
• Added: ClipperLib.Clone(), which make true clone of polygons. Several updates to the Main Demo:
• Added: Clean, Simplify, Lighten buttons
• Change: Custom Polygons: input boxes to textareas to allow more data
• Added: Polygon Output Formats (Clipper, Plain, SVG)
• Update: Polygon Explorer: Also multipolygon is clickable (on Points column)
• Added: Polygon Explorer: When numbers on Points or Points in subpolygons are clicked, the area of multipolygon or subpolygon is shown
• Update: Several updates to wiki in https://sourceforge.net/p/jsclipper/wiki/Home/

4.9.7.2 - 1 January 2013

• Update: Browser specific speedup for ClipperLib.Clipper.Round(), ClipperLib.Cast_Int32() and ClipperLib.Cast_Int64().
• Update: Major enhancements for Main Demo. Including benchmark, custom polygons and polygon importer.
• Update: Documentation is updated with new screenshots of Main Demo. Browser speedtest is published in Wiki.

4.9.7.1 - 12 December 2012

• Initial release