@azerion/phaser

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Phaser Source: src/pixi/utils/EarCut.js</title>  <link type="text/css" rel="stylesheet" href="styles/default.css"> <link type="text/css" rel="stylesheet" href="styles/sunlight.default.css"> <link type="text/css" rel="stylesheet" href="styles/site.cerulean.css"> </head> <body> <div class="container-fluid"> <div class="navbar navbar-fixed-top navbar-inverse"> <div style="position: absolute; width: 143px; height: 31px; right: 10px; top: 10px; z-index: 1050"><a href="http://phaser.io"><img src="img/phaser.png" border="0" /></a></div> <div class="navbar-inner"> <a class="brand" href="index.html">Phaser API</a> <ul class="nav"> <li class="dropdown"> <a href="namespaces.list.html" class="dropdown-toggle" data-toggle="dropdown">Namespaces<b class="caret"></b></a> <ul class="dropdown-menu "> <li class="class-depth-0"> <a href="Phaser.html">Phaser</a> </li> <li class="class-depth-0"> <a href="PIXI.html">PIXI</a> </li> </ul> 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href="Phaser.Component.PhysicsBody.html">PhysicsBody</a> </li> <li class="class-depth-2"> <a href="Phaser.Component.Reset.html">Reset</a> </li> <li class="class-depth-2"> <a href="Phaser.Component.ScaleMinMax.html">ScaleMinMax</a> </li> <li class="class-depth-2"> <a href="Phaser.Component.Smoothed.html">Smoothed</a> </li> <li class="class-depth-1"> <a href="Phaser.Create.html">Create</a> </li> <li class="class-depth-1"> <a href="Phaser.Creature.html">Creature</a> </li> <li class="class-depth-1"> <a href="Phaser.Device.html">Device</a> </li> <li class="class-depth-1"> <a href="Phaser.DeviceButton.html">DeviceButton</a> </li> <li class="class-depth-1"> <a href="Phaser.DOM.html">DOM</a> </li> <li class="class-depth-1"> <a href="Phaser.Easing.html">Easing</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Back.html">Back</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Bounce.html">Bounce</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Circular.html">Circular</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Cubic.html">Cubic</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Elastic.html">Elastic</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Exponential.html">Exponential</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Linear.html">Linear</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Quadratic.html">Quadratic</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Quartic.html">Quartic</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Quintic.html">Quintic</a> </li> <li class="class-depth-2"> <a href="Phaser.Easing.Sinusoidal.html">Sinusoidal</a> </li> <li class="class-depth-1"> <a href="Phaser.Ellipse.html">Ellipse</a> </li> <li class="class-depth-1"> <a href="Phaser.Events.html">Events</a> </li> <li class="class-depth-1"> <a href="Phaser.Filter.html">Filter</a> </li> <li class="class-depth-1"> <a href="Phaser.FlexGrid.html">FlexGrid</a> </li> <li class="class-depth-1"> <a href="Phaser.FlexLayer.html">FlexLayer</a> </li> <li class="class-depth-1"> <a href="Phaser.Frame.html">Frame</a> </li> <li class="class-depth-1"> <a href="Phaser.FrameData.html">FrameData</a> </li> <li class="class-depth-1"> <a href="Phaser.Game.html">Game</a> </li> <li class="class-depth-1"> <a href="Phaser.GameObjectCreator.html">GameObjectCreator</a> </li> <li class="class-depth-1"> <a href="Phaser.GameObjectFactory.html">GameObjectFactory</a> </li> <li class="class-depth-1"> <a href="Phaser.Gamepad.html">Gamepad</a> </li> <li class="class-depth-1"> <a href="Phaser.Graphics.html">Graphics</a> </li> <li class="class-depth-1"> <a href="Phaser.Group.html">Group</a> </li> <li class="class-depth-1"> <a href="Phaser.Hermite.html">Hermite</a> </li> <li class="class-depth-1"> <a href="Phaser.Image.html">Image</a> </li> <li class="class-depth-1"> <a href="Phaser.ImageCollection.html">ImageCollection</a> </li> <li class="class-depth-1"> <a href="Phaser.Input.html">Input</a> </li> <li class="class-depth-1"> <a href="Phaser.InputHandler.html">InputHandler</a> </li> <li class="class-depth-1"> <a href="Phaser.Key.html">Key</a> </li> <li class="class-depth-1"> <a href="Phaser.Keyboard.html">Keyboard</a> </li> <li class="class-depth-1"> <a href="Phaser.KeyCode.html">KeyCode</a> </li> <li class="class-depth-1"> <a href="Phaser.Line.html">Line</a> </li> <li class="class-depth-1"> <a href="Phaser.LinkedList.html">LinkedList</a> </li> <li class="class-depth-1"> <a href="Phaser.Loader.html">Loader</a> </li> <li class="class-depth-1"> <a href="Phaser.LoaderParser.html">LoaderParser</a> </li> <li class="class-depth-1"> <a href="Phaser.Math.html">Math</a> </li> <li class="class-depth-1"> <a href="Phaser.Matrix.html">Matrix</a> </li> <li class="class-depth-1"> <a href="Phaser.Mouse.html">Mouse</a> </li> <li class="class-depth-1"> <a href="Phaser.MSPointer.html">MSPointer</a> </li> <li class="class-depth-1"> <a href="Phaser.Net.html">Net</a> </li> <li class="class-depth-1"> <a href="Phaser.Particle.html">Particle</a> </li> <li class="class-depth-1"> <a href="Phaser.Particles.html">Particles</a> </li> <li class="class-depth-2"> <a href="Phaser.Particles.Arcade.html">Arcade</a> </li> <li class="class-depth-3"> <a href="Phaser.Particles.Arcade.Emitter.html">Emitter</a> </li> <li class="class-depth-1"> <a href="Phaser.Path.html">Path</a> </li> <li class="class-depth-1"> <a href="Phaser.PathFollower.html">PathFollower</a> </li> <li class="class-depth-1"> <a href="Phaser.PathPoint.html">PathPoint</a> </li> <li class="class-depth-1"> <a href="Phaser.Physics.html">Physics</a> </li> <li class="class-depth-2"> <a href="Phaser.Physics.Arcade.html">Arcade</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.Arcade.Body.html">Body</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.Arcade.TilemapCollision.html">TilemapCollision</a> </li> <li class="class-depth-2"> <a href="Phaser.Physics.Ninja.html">Ninja</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.Ninja.AABB.html">AABB</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.Ninja.Body.html">Body</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.Ninja.Circle.html">Circle</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.Ninja.Tile.html">Tile</a> </li> <li class="class-depth-2"> <a href="Phaser.Physics.P2.html">P2</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.Body.html">Body</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.BodyDebug.html">BodyDebug</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.CollisionGroup.html">CollisionGroup</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.ContactMaterial.html">ContactMaterial</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.DistanceConstraint.html">DistanceConstraint</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.FixtureList.html">FixtureList</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.GearConstraint.html">GearConstraint</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.InversePointProxy.html">InversePointProxy</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.LockConstraint.html">LockConstraint</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.Material.html">Material</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.PointProxy.html">PointProxy</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.PrismaticConstraint.html">PrismaticConstraint</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.RevoluteConstraint.html">RevoluteConstraint</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.RotationalSpring.html">RotationalSpring</a> </li> <li class="class-depth-3"> <a href="Phaser.Physics.P2.Spring.html">Spring</a> </li> <li class="class-depth-1"> <a href="Phaser.Plugin.html">Plugin</a> </li> <li class="class-depth-2"> <a href="Phaser.Plugin.PathManager.html">PathManager</a> </li> <li class="class-depth-1"> <a href="Phaser.PluginManager.html">PluginManager</a> </li> <li class="class-depth-1"> <a href="Phaser.Point.html">Point</a> </li> <li class="class-depth-1"> <a href="Phaser.Pointer.html">Pointer</a> </li> <li class="class-depth-1"> <a href="Phaser.PointerMode.html">PointerMode</a> </li> <li class="class-depth-1"> <a href="Phaser.Polygon.html">Polygon</a> </li> <li class="class-depth-1"> <a href="Phaser.QuadTree.html">QuadTree</a> </li> <li class="class-depth-1"> <a href="Phaser.RandomDataGenerator.html">RandomDataGenerator</a> </li> <li class="class-depth-1"> <a href="Phaser.Rectangle.html">Rectangle</a> </li> <li class="class-depth-1"> <a href="Phaser.RenderTexture.html">RenderTexture</a> </li> <li class="class-depth-1"> <a href="Phaser.RequestAnimationFrame.html">RequestAnimationFrame</a> </li> <li class="class-depth-1"> <a href="Phaser.RetroFont.html">RetroFont</a> </li> <li class="class-depth-1"> <a href="Phaser.Rope.html">Rope</a> </li> <li class="class-depth-1"> <a href="Phaser.RoundedRectangle.html">RoundedRectangle</a> </li> <li class="class-depth-1"> <a href="Phaser.ScaleManager.html">ScaleManager</a> </li> <li class="class-depth-1"> <a href="Phaser.Signal.html">Signal</a> </li> <li class="class-depth-1"> <a href="Phaser.SignalBinding_.html">SignalBinding</a> </li> <li class="class-depth-1"> <a href="Phaser.SinglePad.html">SinglePad</a> </li> <li class="class-depth-1"> <a href="Phaser.Sound.html">Sound</a> </li> <li class="class-depth-1"> <a href="Phaser.SoundManager.html">SoundManager</a> </li> <li class="class-depth-1"> <a href="Phaser.Sprite.html">Sprite</a> </li> <li class="class-depth-1"> <a href="Phaser.SpriteBatch.html">SpriteBatch</a> </li> <li class="class-depth-1"> <a href="Phaser.Stage.html">Stage</a> </li> <li class="class-depth-1"> <a href="Phaser.State.html">State</a> </li> <li class="class-depth-1"> <a href="Phaser.StateManager.html">StateManager</a> </li> <li class="class-depth-1"> <a href="Phaser.Text.html">Text</a> </li> <li class="class-depth-1"> <a href="Phaser.Tile.html">Tile</a> </li> <li class="class-depth-1"> <a href="Phaser.Tilemap.html">Tilemap</a> </li> <li class="class-depth-1"> <a href="Phaser.TilemapLayer.html">TilemapLayer</a> </li> <li class="class-depth-1"> <a href="Phaser.TilemapParser.html">TilemapParser</a> </li> <li class="class-depth-1"> <a href="Phaser.Tileset.html">Tileset</a> </li> <li class="class-depth-1"> <a href="Phaser.TileSprite.html">TileSprite</a> </li> <li class="class-depth-1"> <a href="Phaser.Time.html">Time</a> </li> <li class="class-depth-1"> <a href="Phaser.Timer.html">Timer</a> </li> <li class="class-depth-1"> <a href="Phaser.TimerEvent.html">TimerEvent</a> </li> <li class="class-depth-1"> <a href="Phaser.Touch.html">Touch</a> </li> <li class="class-depth-1"> <a href="Phaser.Tween.html">Tween</a> </li> <li class="class-depth-1"> <a href="Phaser.TweenData.html">TweenData</a> </li> <li class="class-depth-1"> <a href="Phaser.TweenManager.html">TweenManager</a> </li> <li class="class-depth-1"> <a href="Phaser.Utils.html">Utils</a> </li> <li class="class-depth-2"> <a href="Phaser.Utils.Debug.html">Debug</a> </li> <li class="class-depth-1"> <a href="Phaser.Video.html">Video</a> </li> <li class="class-depth-1"> <a href="Phaser.Weapon.html">Weapon</a> </li> <li class="class-depth-1"> <a href="Phaser.World.html">World</a> </li> <li class="class-depth-1"> <a href="PIXI.AbstractFilter.html">AbstractFilter</a> </li> <li class="class-depth-1"> <a href="PIXI.BaseTexture.html">BaseTexture</a> </li> <li class="class-depth-1"> <a href="PIXI.CanvasBuffer.html">CanvasBuffer</a> </li> <li class="class-depth-1"> <a href="PIXI.CanvasGraphics.html">CanvasGraphics</a> </li> <li class="class-depth-1"> <a href="PIXI.CanvasMaskManager.html">CanvasMaskManager</a> </li> <li class="class-depth-1"> <a href="PIXI.CanvasPool.html">CanvasPool</a> </li> <li class="class-depth-1"> <a href="PIXI.CanvasRenderer.html">CanvasRenderer</a> </li> <li class="class-depth-1"> <a href="PIXI.CanvasTinter.html">CanvasTinter</a> </li> <li class="class-depth-1"> <a href="PIXI.ComplexPrimitiveShader.html">ComplexPrimitiveShader</a> </li> <li class="class-depth-1"> <a href="PIXI.DisplayObjectContainer.html">DisplayObjectContainer</a> </li> <li class="class-depth-1"> <a href="PIXI.EarCut.html">EarCut</a> </li> <li class="class-depth-1"> <a href="PIXI.Event.html">Event</a> </li> <li class="class-depth-1"> <a href="PIXI.EventTarget.html">EventTarget</a> </li> <li class="class-depth-1"> <a href="PIXI.FilterTexture.html">FilterTexture</a> </li> <li class="class-depth-1"> <a href="PIXI.Graphics.html">Graphics</a> </li> <li class="class-depth-1"> <a href="PIXI.GraphicsData.html">GraphicsData</a> </li> <li class="class-depth-1"> <a href="PIXI.PIXI.html">PIXI</a> </li> <li class="class-depth-2"> <a href="PIXI.PIXI.DisplayObject.html">DisplayObject</a> </li> <li class="class-depth-1"> <a href="PIXI.PixiFastShader.html">PixiFastShader</a> </li> <li class="class-depth-1"> <a href="PIXI.PixiShader.html">PixiShader</a> </li> <li class="class-depth-1"> <a href="PIXI.PrimitiveShader.html">PrimitiveShader</a> </li> <li class="class-depth-1"> <a href="PIXI.RenderTexture.html">RenderTexture</a> </li> <li class="class-depth-1"> <a href="PIXI.Rope.html">Rope</a> </li> <li class="class-depth-1"> <a href="PIXI.Sprite.html">Sprite</a> </li> <li class="class-depth-1"> <a href="PIXI.SpriteBatch.html">SpriteBatch</a> </li> <li class="class-depth-1"> <a href="PIXI.Strip.html">Strip</a> </li> <li class="class-depth-1"> <a href="PIXI.StripShader.html">StripShader</a> </li> <li class="class-depth-1"> <a href="PIXI.Texture.html">Texture</a> </li> <li class="class-depth-1"> <a href="PIXI.TilingSprite.html">TilingSprite</a> </li> <li class="class-depth-1"> <a 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href="http://phaser.io/learn">Tutorials</a></li> <li class="class-depth-1"><a href="http://phaser.io/community/newsletter">Newsletter</a></li> <li class="class-depth-1"><a href="http://phaser.io/community/twitter">Twitter</a></li> <li class="class-depth-1"><a href="http://phaser.io/community/slack">Slack</a></li> <li class="class-depth-1"><a href="http://phaser.io/community/donate">Donate</a></li> <li class="class-depth-1"><a href="https://www.codeandweb.com/texturepacker/phaser">Texture Packer</a></li> </ul> </li> </ul> </div> </div> <div class="row-fluid"> <div class="span12"> <div id="main"> <h1 class="page-title">Source: src/pixi/utils/EarCut.js</h1> <section> <article> <pre class="sunlight-highlight-javascript linenums">/* Copyright (c) 2016, Mapbox Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /** * @class EarCut */ PIXI.EarCut = {}; PIXI.EarCut.Triangulate = function (data, holeIndices, dim) { dim = dim || 2; var hasHoles = holeIndices && holeIndices.length, outerLen = hasHoles ? holeIndices[0] * dim : data.length, outerNode = PIXI.EarCut.linkedList(data, 0, outerLen, dim, true), triangles = []; if (!outerNode) return triangles; var minX, minY, maxX, maxY, x, y, size; if (hasHoles) outerNode = PIXI.EarCut.eliminateHoles(data, holeIndices, outerNode, dim); // if the shape is not too simple, we'll use z-order curve hash later; calculate polygon bbox if (data.length > 80 * dim) { minX = maxX = data[0]; minY = maxY = data[1]; for (var i = dim; i < outerLen; i += dim) { x = data[i]; y = data[i + 1]; if (x < minX) minX = x; if (y < minY) minY = y; if (x > maxX) maxX = x; if (y > maxY) maxY = y; } // minX, minY and size are later used to transform coords into integers for z-order calculation size = Math.max(maxX - minX, maxY - minY); } PIXI.EarCut.earcutLinked(outerNode, triangles, dim, minX, minY, size); return triangles; } // create a circular doubly linked list from polygon points in the specified winding order PIXI.EarCut.linkedList = function (data, start, end, dim, clockwise) { var sum = 0, i, j, last; // calculate original winding order of a polygon ring for (i = start, j = end - dim; i < end; i += dim) { sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]); j = i; } // link points into circular doubly-linked list in the specified winding order if (clockwise === (sum > 0)) { for (i = start; i < end; i += dim) last = PIXI.EarCut.insertNode(i, data[i], data[i + 1], last); } else { for (i = end - dim; i >= start; i -= dim) last = PIXI.EarCut.insertNode(i, data[i], data[i + 1], last); } return last; } // eliminate colinear or duplicate points PIXI.EarCut.filterPoints = function (start, end) { if (!start) return start; if (!end) end = start; var p = start, again; do { again = false; if (!p.steiner && (PIXI.EarCut.equals(p, p.next) || PIXI.EarCut.area(p.prev, p, p.next) === 0)) { PIXI.EarCut.removeNode(p); p = end = p.prev; if (p === p.next) return null; again = true; } else { p = p.next; } } while (again || p !== end); return end; } // main ear slicing loop which triangulates a polygon (given as a linked list) PIXI.EarCut.earcutLinked = function (ear, triangles, dim, minX, minY, size, pass) { if (!ear) return; // interlink polygon nodes in z-order if (!pass && size) PIXI.EarCut.indexCurve(ear, minX, minY, size); var stop = ear, prev, next; // iterate through ears, slicing them one by one while (ear.prev !== ear.next) { prev = ear.prev; next = ear.next; if (size ? PIXI.EarCut.isEarHashed(ear, minX, minY, size) : PIXI.EarCut.isEar(ear)) { // cut off the triangle triangles.push(prev.i / dim); triangles.push(ear.i / dim); triangles.push(next.i / dim); PIXI.EarCut.removeNode(ear); // skipping the next vertice leads to less sliver triangles ear = next.next; stop = next.next; continue; } ear = next; // if we looped through the whole remaining polygon and can't find any more ears if (ear === stop) { // try filtering points and slicing again if (!pass) { PIXI.EarCut.earcutLinked(PIXI.EarCut.filterPoints(ear), triangles, dim, minX, minY, size, 1); // if this didn't work, try curing all small self-intersections locally } else if (pass === 1) { ear = PIXI.EarCut.cureLocalIntersections(ear, triangles, dim); PIXI.EarCut.earcutLinked(ear, triangles, dim, minX, minY, size, 2); // as a last resort, try splitting the remaining polygon into two } else if (pass === 2) { PIXI.EarCut.splitEarcut(ear, triangles, dim, minX, minY, size); } break; } } } // check whether a polygon node forms a valid ear with adjacent nodes PIXI.EarCut.isEar = function (ear) { var a = ear.prev, b = ear, c = ear.next; if (PIXI.EarCut.area(a, b, c) >= 0) return false; // reflex, can't be an ear // now make sure we don't have other points inside the potential ear var p = ear.next.next; while (p !== ear.prev) { if (PIXI.EarCut.pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && PIXI.EarCut.area(p.prev, p, p.next) >= 0) return false; p = p.next; } return true; } PIXI.EarCut.isEarHashed = function (ear, minX, minY, size) { var a = ear.prev, b = ear, c = ear.next; if (PIXI.EarCut.area(a, b, c) >= 0) return false; // reflex, can't be an ear // triangle bbox; min & max are calculated like this for speed var minTX = a.x < b.x ? (a.x < c.x ? a.x : c.x) : (b.x < c.x ? b.x : c.x), minTY = a.y < b.y ? (a.y < c.y ? a.y : c.y) : (b.y < c.y ? b.y : c.y), maxTX = a.x > b.x ? (a.x > c.x ? a.x : c.x) : (b.x > c.x ? b.x : c.x), maxTY = a.y > b.y ? (a.y > c.y ? a.y : c.y) : (b.y > c.y ? b.y : c.y); // z-order range for the current triangle bbox; var minZ = PIXI.EarCut.zOrder(minTX, minTY, minX, minY, size), maxZ = PIXI.EarCut.zOrder(maxTX, maxTY, minX, minY, size); // first look for points inside the triangle in increasing z-order var p = ear.nextZ; while (p && p.z <= maxZ) { if (p !== ear.prev && p !== ear.next && PIXI.EarCut.pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && PIXI.EarCut.area(p.prev, p, p.next) >= 0) return false; p = p.nextZ; } // then look for points in decreasing z-order p = ear.prevZ; while (p && p.z >= minZ) { if (p !== ear.prev && p !== ear.next && PIXI.EarCut.pointInTriangle(a.x, a.y, b.x, b.y, c.x, c.y, p.x, p.y) && PIXI.EarCut.area(p.prev, p, p.next) >= 0) return false; p = p.prevZ; } return true; } // go through all polygon nodes and cure small local self-intersections PIXI.EarCut.cureLocalIntersections = function (start, triangles, dim) { var p = start; do { var a = p.prev, b = p.next.next; // a self-intersection where edge (v[i-1],v[i]) intersects (v[i+1],v[i+2]) if (PIXI.EarCut.intersects(a, p, p.next, b) && PIXI.EarCut.locallyInside(a, b) && PIXI.EarCut.locallyInside(b, a)) { triangles.push(a.i / dim); triangles.push(p.i / dim); triangles.push(b.i / dim); // remove two nodes involved PIXI.EarCut.removeNode(p); PIXI.EarCut.removeNode(p.next); p = start = b; } p = p.next; } while (p !== start); return p; } // try splitting polygon into two and triangulate them independently PIXI.EarCut.splitEarcut = function (start, triangles, dim, minX, minY, size) { // look for a valid diagonal that divides the polygon into two var a = start; do { var b = a.next.next; while (b !== a.prev) { if (a.i !== b.i && PIXI.EarCut.isValidDiagonal(a, b)) { // split the polygon in two by the diagonal var c = PIXI.EarCut.splitPolygon(a, b); // filter colinear points around the cuts a = PIXI.EarCut.filterPoints(a, a.next); c = PIXI.EarCut.filterPoints(c, c.next); // run earcut on each half PIXI.EarCut.earcutLinked(a, triangles, dim, minX, minY, size); PIXI.EarCut.earcutLinked(c, triangles, dim, minX, minY, size); return; } b = b.next; } a = a.next; } while (a !== start); } // link every hole into the outer loop, producing a single-ring polygon without holes PIXI.EarCut.eliminateHoles = function (data, holeIndices, outerNode, dim) { var queue = [], i, len, start, end, list; for (i = 0, len = holeIndices.length; i < len; i++) { start = holeIndices[i] * dim; end = i < len - 1 ? holeIndices[i + 1] * dim : data.length; list = PIXI.EarCut.linkedList(data, start, end, dim, false); if (list === list.next) list.steiner = true; queue.push(PIXI.EarCut.getLeftmost(list)); } queue.sort(compareX); // process holes from left to right for (i = 0; i < queue.length; i++) { PIXI.EarCut.eliminateHole(queue[i], outerNode); outerNode = PIXI.EarCut.filterPoints(outerNode, outerNode.next); } return outerNode; } PIXI.EarCut.compareX = function (a, b) { return a.x - b.x; } // find a bridge between vertices that connect