@flatten-js/core

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width,initial-scale=1"> <title>classes/edge.js - Documentation</title> <script src="scripts/prettify/prettify.js"></script> <script src="scripts/prettify/lang-css.js"></script>  <link type="text/css" rel="stylesheet" href="https://code.ionicframework.com/ionicons/2.0.1/css/ionicons.min.css"> <link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css"> <link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css"> </head> <body> <input type="checkbox" id="nav-trigger" class="nav-trigger" /> <label for="nav-trigger" class="navicon-button x"> <div class="navicon"></div> </label> <label for="nav-trigger" class="overlay"></label> <nav> <li class="nav-link nav-home-link"><a href="index.html">Home</a></li><li class="nav-heading">Classes</li><li class="nav-heading">C<a href="Arc.html">Arc</a></li><li class="nav-item">F<a href="Arc.html#clone">clone</a></li><li 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href="Point.html#lessThan">lessThan</a></li><li class="nav-item">F<a href="Point.html#rotate">rotate</a></li><li class="nav-item">F<a href="Point.html#translate">translate</a></li><li class="nav-item">F<a href="Point.html#transform">transform</a></li><li class="nav-item">F<a href="Point.html#projectionOn">projectionOn</a></li><li class="nav-item">F<a href="Point.html#leftTo">leftTo</a></li><li class="nav-item">F<a href="Point.html#distanceTo">distanceTo</a></li><li class="nav-item">F<a href="Point.html#on">on</a></li><li class="nav-item">F<a href="Point.html#toJSON">toJSON</a></li><li class="nav-item">F<a href="Point.html#svg">svg</a></li><li class="nav-heading">C<a href="Polygon.html">Polygon</a></li><li class="nav-item">F<a href="Polygon.html#clone">clone</a></li><li class="nav-item">F<a href="Polygon.html#isEmpty">isEmpty</a></li><li class="nav-item">F<a href="Polygon.html#isValid">isValid</a></li><li class="nav-item">F<a href="Polygon.html#area">area</a></li><li class="nav-item">F<a href="Polygon.html#addFace">addFace</a></li><li class="nav-item">F<a href="Polygon.html#deleteFace">deleteFace</a></li><li class="nav-item">F<a href="Polygon.html#removeChain">removeChain</a></li><li class="nav-item">F<a href="Polygon.html#addVertex">addVertex</a></li><li class="nav-item">F<a href="Polygon.html#cut">cut</a></li><li class="nav-item">F<a href="Polygon.html#cutFace">cutFace</a></li><li class="nav-item">F<a href="Polygon.html#findEdgeByPoint">findEdgeByPoint</a></li><li class="nav-item">F<a href="Polygon.html#splitToIslands">splitToIslands</a></li><li class="nav-item">F<a href="Polygon.html#reverse">reverse</a></li><li class="nav-item">F<a href="Polygon.html#contains">contains</a></li><li class="nav-item">F<a href="Polygon.html#distanceTo">distanceTo</a></li><li class="nav-item">F<a href="Polygon.html#intersect">intersect</a></li><li class="nav-item">F<a href="Polygon.html#translate">translate</a></li><li class="nav-item">F<a href="Polygon.html#rotate">rotate</a></li><li class="nav-item">F<a href="Polygon.html#transform">transform</a></li><li class="nav-item">F<a href="Polygon.html#toJSON">toJSON</a></li><li class="nav-item">F<a href="Polygon.html#toArray">toArray</a></li><li class="nav-item">F<a href="Polygon.html#svg">svg</a></li><li class="nav-heading">C<a href="Ray.html">Ray</a></li><li class="nav-item">F<a href="Ray.html#clone">clone</a></li><li class="nav-item">F<a href="Ray.html#contains">contains</a></li><li class="nav-item">F<a href="Ray.html#split">split</a></li><li class="nav-item">F<a href="Ray.html#intersect">intersect</a></li><li class="nav-item">F<a href="Ray.html#svg">svg</a></li><li class="nav-heading">C<a href="Segment.html">Segment</a></li><li class="nav-item">F<a href="Segment.html#clone">clone</a></li><li class="nav-item">F<a href="Segment.html#equalTo">equalTo</a></li><li class="nav-item">F<a href="Segment.html#contains">contains</a></li><li class="nav-item">F<a href="Segment.html#intersect">intersect</a></li><li class="nav-item">F<a href="Segment.html#distanceTo">distanceTo</a></li><li class="nav-item">F<a href="Segment.html#tangentInStart">tangentInStart</a></li><li class="nav-item">F<a href="Segment.html#tangentInEnd">tangentInEnd</a></li><li class="nav-item">F<a href="Segment.html#reverse">reverse</a></li><li class="nav-item">F<a href="Segment.html#split">split</a></li><li class="nav-item">F<a href="Segment.html#middle">middle</a></li><li class="nav-item">F<a href="Segment.html#translate">translate</a></li><li class="nav-item">F<a href="Segment.html#rotate">rotate</a></li><li class="nav-item">F<a href="Segment.html#transform">transform</a></li><li class="nav-item">F<a href="Segment.html#isZeroLength">isZeroLength</a></li><li class="nav-item">F<a href="Segment.html#sortPoints">sortPoints</a></li><li class="nav-item">F<a href="Segment.html#toJSON">toJSON</a></li><li class="nav-item">F<a href="Segment.html#svg">svg</a></li><li 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href="Vector.html#projectionOn">projectionOn</a></li><li class="nav-item">F<a href="Vector.html#toJSON">toJSON</a></li><li class="nav-heading">C<a href="CircularLinkedList.html">CircularLinkedList</a></li><li class="nav-item">F<a href="CircularLinkedList.html#append">append</a></li><li class="nav-item">F<a href="CircularLinkedList.html#insert">insert</a></li><li class="nav-item">F<a href="CircularLinkedList.html#remove">remove</a></li><li class="nav-heading">C<a href="DE9IM.html">DE9IM</a></li><li class="nav-item">F<a href="DE9IM.html#toString">toString</a></li><li class="nav-heading">C<a href="LinkedList.html">LinkedList</a></li><li class="nav-item">F<a href="LinkedList.html#toArray">toArray</a></li><li class="nav-item">F<a href="LinkedList.html#append">append</a></li><li class="nav-item">F<a href="LinkedList.html#insert">insert</a></li><li class="nav-item">F<a href="LinkedList.html#remove">remove</a></li><li class="nav-item">F<a href="LinkedList.html#isEmpty">isEmpty</a></li><li class="nav-item">F<a href="LinkedList.html#.testInfiniteLoop">testInfiniteLoop</a></li><li class="nav-heading">C<a href="PlanarSet.html">PlanarSet</a></li><li class="nav-item">F<a href="PlanarSet.html#add">add</a></li><li class="nav-item">F<a href="PlanarSet.html#delete">delete</a></li><li class="nav-item">F<a href="PlanarSet.html#clear">clear</a></li><li class="nav-item">F<a href="PlanarSet.html#search">search</a></li><li class="nav-item">F<a href="PlanarSet.html#hit">hit</a></li><li class="nav-item">F<a href="PlanarSet.html#svg">svg</a></li><li class="nav-heading">C<a href="Errors.html">Errors</a></li><li class="nav-heading">Modules</li><li class="nav-heading">M<a href="module-BooleanOperations.html">BooleanOperations</a></li><li class="nav-item">F<a href="module-BooleanOperations.html#.unify">unify</a></li><li class="nav-item">F<a href="module-BooleanOperations.html#.subtract">subtract</a></li><li class="nav-item">F<a href="module-BooleanOperations.html#.intersect">intersect</a></li><li class="nav-item">F<a href="module-BooleanOperations.html#.innerClip">innerClip</a></li><li class="nav-item">F<a href="module-BooleanOperations.html#.outerClip">outerClip</a></li><li class="nav-item">F<a href="module-BooleanOperations.html#.calculateIntersections">calculateIntersections</a></li><li class="nav-heading">M<a href="module-RayShoot.html">RayShoot</a></li><li class="nav-item">F<a href="module-RayShoot.html#.ray_shoot">ray_shoot</a></li><li class="nav-heading">M<a href="module-Relation.html">Relation</a></li><li class="nav-item">F<a href="module-Relation.html#.equal">equal</a></li><li class="nav-item">F<a href="module-Relation.html#.intersect">intersect</a></li><li class="nav-item">F<a href="module-Relation.html#.touch">touch</a></li><li class="nav-item">F<a href="module-Relation.html#.disjoint">disjoint</a></li><li class="nav-item">F<a href="module-Relation.html#.inside">inside</a></li><li class="nav-item">F<a href="module-Relation.html#.covered">covered</a></li><li class="nav-item">F<a href="module-Relation.html#.contain">contain</a></li><li class="nav-item">F<a href="module-Relation.html#.cover">cover</a></li><li class="nav-item">F<a href="module-Relation.html#.relate">relate</a></li><li class="nav-heading"><a href="global.html">Globals</a></li><li class="nav-item">F<a href="global.html#inverse">inverse</a></li><li class="nav-item">M<a href="global.html#arc">arc</a></li><li class="nav-item">M<a href="global.html#box">box</a></li><li class="nav-item">M<a href="global.html#circle">circle</a></li><li class="nav-item">M<a href="global.html#line">line</a></li><li class="nav-item">M<a href="global.html#matrix">matrix</a></li><li class="nav-item">M<a href="global.html#multiline">multiline</a></li><li class="nav-item">M<a href="global.html#point">point</a></li><li class="nav-item">M<a href="global.html#polygon">polygon</a></li><li class="nav-item">M<a href="global.html#segment">segment</a></li><li class="nav-item">M<a href="global.html#vector">vector</a></li><li class="nav-item">M<a href="global.html#CCW">CCW</a></li><li class="nav-item">M<a href="global.html#CW">CW</a></li><li class="nav-item">M<a href="global.html#ORIENTATION">ORIENTATION</a></li><li class="nav-item">M<a href="global.html#DP_TOL">DP_TOL</a></li><li class="nav-item">F<a href="global.html#setTolerance">setTolerance</a></li><li class="nav-item">F<a href="global.html#getTolerance">getTolerance</a></li><li class="nav-item">F<a href="global.html#EQ_0">EQ_0</a></li><li class="nav-item">F<a href="global.html#EQ">EQ</a></li><li class="nav-item">F<a href="global.html#GT">GT</a></li><li class="nav-item">F<a href="global.html#GE">GE</a></li><li class="nav-item">F<a href="global.html#LT">LT</a></li><li class="nav-item">F<a href="global.html#LE">LE</a></li> </nav> <div id="main"> <h1 class="page-title">classes/edge.js</h1> <section> <article> <pre class="prettyprint source linenums"><code>/** * Created by Alex Bol on 3/17/2017. */ import Flatten from '../flatten'; import {ray_shoot} from "../algorithms/ray_shooting"; /** * Class representing an edge of polygon. Edge shape may be Segment or Arc. * Each edge contains references to the next and previous edges in the face of the polygon. * * @type {Edge} */ export class Edge { /** * Construct new instance of edge * @param {Shape} shape Shape of type Segment or Arc */ constructor(shape) { /** * Shape of the edge: Segment or Arc * @type {Segment|Arc} */ this.shape = shape; /** * Pointer to the next edge in the face * @type {Edge} */ this.next = undefined; /** * Pointer to the previous edge in the face * @type {Edge} */ this.prev = undefined; /** * Pointer to the face containing this edge * @type {Face} */ this.face = undefined; /** * "Arc distance" from the face start * @type {number} */ this.arc_length = 0; /** * Start inclusion flag (inside/outside/boundary) * @type {*} */ this.bvStart = undefined; /** * End inclusion flag (inside/outside/boundary) * @type {*} */ this.bvEnd = undefined; /** * Edge inclusion flag (Flatten.INSIDE, Flatten.OUTSIDE, Flatten.BOUNDARY) * @type {*} */ this.bv = undefined; /** * Overlap flag for boundary edge (Flatten.OVERLAP_SAME/Flatten.OVERLAP_OPPOSITE) * @type {*} */ this.overlap = undefined; } /** * Get edge start point */ get start() { return this.shape.start; } /** * Get edge end point */ get end() { return this.shape.end; } /** * Get edge length */ get length() { return this.shape.length; } /** * Get bounding box of the edge * @returns {Box} */ get box() { return this.shape.box; } isSegment() { return this.shape instanceof Flatten.Segment; } isArc() { return this.shape instanceof Flatten.Arc; } /** * Get middle point of the edge * @returns {Point} */ middle() { return this.shape.middle(); } /** * Returns true if point belongs to the edge, false otherwise * @param {Point} pt - test point */ contains(pt) { return this.shape.contains(pt); } /** * Set inclusion flag of the edge with respect to another polygon * Inclusion flag is one of Flatten.INSIDE, Flatten.OUTSIDE, Flatten.BOUNDARY * @param polygon */ setInclusion(polygon) { if (this.bv !== undefined) return this.bv; if (this.shape instanceof Flatten.Line || this.shape instanceof Flatten.Ray) { this.bv = Flatten.OUTSIDE; return this.bv; } if (this.bvStart === undefined) { this.bvStart = ray_shoot(polygon, this.start); } if (this.bvEnd === undefined) { this.bvEnd = ray_shoot(polygon, this.end); } /* At least one end outside - the whole edge outside */ if (this.bvStart === Flatten.OUTSIDE || this.bvEnd == Flatten.OUTSIDE) { this.bv = Flatten.OUTSIDE; } /* At least one end inside - the whole edge inside */ else if (this.bvStart === Flatten.INSIDE || this.bvEnd == Flatten.INSIDE) { this.bv = Flatten.INSIDE; } /* Both are boundary - check the middle point */ else { let bvMiddle = ray_shoot(polygon, this.middle()); // let boundary = this.middle().distanceTo(polygon)[0] < 10*Flatten.DP_TOL; // let bvMiddle = boundary ? Flatten.BOUNDARY : ray_shoot(polygon, this.middle()); this.bv = bvMiddle; } return this.bv; } /** * Set overlapping between two coincident boundary edges * Overlapping flag is one of Flatten.OVERLAP_SAME or Flatten.OVERLAP_OPPOSITE * @param edge */ setOverlap(edge) { let flag = undefined; let shape1 = this.shape; let shape2 = edge.shape; if (shape1 instanceof Flatten.Segment && shape2 instanceof Flatten.Segment) { if (shape1.start.equalTo(shape2.start) && shape1.end.equalTo(shape2.end)) { flag = Flatten.OVERLAP_SAME; } else if (shape1.start.equalTo(shape2.end) && shape1.end.equalTo(shape2.start)) { flag = Flatten.OVERLAP_OPPOSITE; } } else if (shape1 instanceof Flatten.Arc && shape2 instanceof Flatten.Arc) { if (shape1.start.equalTo(shape2.start) && shape1.end.equalTo(shape2.end) && /*shape1.counterClockwise === shape2.counterClockwise &&*/ shape1.middle().equalTo(shape2.middle())) { flag = Flatten.OVERLAP_SAME; } else if (shape1.start.equalTo(shape2.end) && shape1.end.equalTo(shape2.start) && /*shape1.counterClockwise !== shape2.counterClockwise &&*/ shape1.middle().equalTo(shape2.middle())) { flag = Flatten.OVERLAP_OPPOSITE; } } else if (shape1 instanceof Flatten.Segment && shape2 instanceof Flatten.Arc || shape1 instanceof Flatten.Arc && shape2 instanceof Flatten.Segment) { if (shape1.start.equalTo(shape2.start) && shape1.end.equalTo(shape2.end) && shape1.middle().equalTo(shape2.middle())) { flag = Flatten.OVERLAP_SAME; } else if (shape1.start.equalTo(shape2.end) && shape1.end.equalTo(shape2.start) && shape1.middle().equalTo(shape2.middle())) { flag = Flatten.OVERLAP_OPPOSITE; } } /* Do not update overlap flag if already set on previous chain */ if (this.overlap === undefined) this.overlap = flag; if (edge.overlap === undefined) edge.overlap = flag; } svg() { if (this.shape instanceof Flatten.Segment) { return ` L${this.shape.end.x},${this.shape.end.y}`; } else if (this.shape instanceof Flatten.Arc) { let arc = this.shape; let largeArcFlag; let sweepFlag = arc.counterClockwise ? "1" : "0"; // Draw full circe arc as special case: split it into two half-circles if (Flatten.Utils.EQ(arc.sweep, 2 * Math.PI)) { let sign = arc.counterClockwise ? 1 : -1; let halfArc1 = new Flatten.Arc(arc.pc, arc.r, arc.startAngle, arc.startAngle + sign * Math.PI, arc.counterClockwise); let halfArc2 = new Flatten.Arc(arc.pc, arc.r, arc.startAngle + sign * Math.PI, arc.endAngle, arc.counterClockwise); largeArcFlag = "0"; return ` A${halfArc1.r},${halfArc1.r} 0 ${largeArcFlag},${sweepFlag} ${halfArc1.end.x},${halfArc1.end.y} A${halfArc2.r},${halfArc2.r} 0 ${largeArcFlag},${sweepFlag} ${halfArc2.end.x},${halfArc2.end.y}` } else { largeArcFlag = arc.sweep <= Math.PI ? "0" : "1"; return ` A${arc.r},${arc.r} 0 ${largeArcFlag},${sweepFlag} ${arc.end.x},${arc.end.y}`; } } } toJSON() { return this.shape.toJSON(); } }; Flatten.Edge = Edge; </code></pre> </article> </section> </div> <footer> Generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.6.3</a> on Sun May 16 2021 15:05:05 GMT+0300 (Israel Daylight Time) using the Minami theme. </footer> <script>prettyPrint();</script> <script src="scripts/linenumber.js"></script> </body> </html>