From 3d89db48d9e1ea020972e8fb9566bea1dc8aa495 Mon Sep 17 00:00:00 2001 From: Gregor Aisch Date: Fri, 27 Sep 2013 12:20:56 +0200 Subject: [PATCH] fixed centroid calculation for empty polygons, contours always in clockwise order --- CHANGELOG.md | 4 ++ kartograph-0.8.1.min.js | 3 -- kartograph-0.8.1.js => kartograph-0.8.2.js | 48 ++++++++++++++++------ kartograph-0.8.2.min.js | 3 ++ kartograph.js | 2 +- package.json | 2 +- src/core/path.coffee | 37 +++++++++++++---- 7 files changed, 73 insertions(+), 26 deletions(-) delete mode 100644 kartograph-0.8.1.min.js rename kartograph-0.8.1.js => kartograph-0.8.2.js (99%) create mode 100644 kartograph-0.8.2.min.js diff --git a/CHANGELOG.md b/CHANGELOG.md index 5903842..577f8e5 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -1,3 +1,7 @@ +### 0.8.2 +* fixed centroid calculation for polygons with area = 0 +* fixed order for polygons + ### 0.8.1 * simplified API: loadMap() --> load() diff --git a/kartograph-0.8.1.min.js b/kartograph-0.8.1.min.js 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t,r,e,o,i,a,s,l,u,p,h,c,f,d,y,m,v,g,_,b,x,w,M,P,C,j,A,B,L,S,k,I,N,G,z,E,T,R,F,V,O,H,X,q,D,U,Q;if(n=this,null==(H=n.osymbols)&&(n.osymbols=n.symbols),u=3,t=n.type,ae.call(t.props,"radius")<0)return Sr('noverlap layout only available for symbols with property "radius"'),void 0;for(j=n.osymbols.slice(),null!=n.clusteringOpts&&(L=n.clusteringOpts.tolerance,f=n.clusteringOpts.maxRatio),null==L&&(L=.05),null==f&&(f=.8),s=N=0,X=u-1;X>=0?X>=N:N>=X;s=X>=0?++N:--N){for(j.sort(function(t,r){return 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t,r,o,i,a,s,l,u,p,h,c;for(n=this,i=n.tooltip,h=n.symbols,s=0,u=h.length;u>s;s++)for(o=h[s],t={position:{target:"mouse",viewport:e(window),adjust:{x:7,y:7}},show:{delay:20},content:{},events:{show:function(t,r){return e(".qtip").filter(function(){return this!==r.elements.tooltip.get(0)}).hide()}}},a=i(o.data,o.key),"string"===Nr(a)?t.content.text=a:"array"===Nr(a)&&(t.content.title=a[0],t.content.text=a[1]),c=o.nodes(),l=0,p=c.length;p>l;l++)r=c[l],e(r).qtip(t)},r.prototype.onResize=function(){var t,r,e,o;for(n=this,n.layout(),o=n.symbols,r=0,e=o.length;e>r;r++)t=o[r],t.update()},r.prototype.update=function(t,r,e){var o,i,a,s,l,u,p,h;for(n=this,null==t&&(t={}),p=n.symbols,a=0,l=p.length;l>a;a++){for(i=p[a],h=n.type.props,s=0,u=h.length;u>s;s++)o=h[s],null!=t[o]?i[o]=n._evaluate(t[o],i.data):null!=n[o]&&(i[o]=n._evaluate(n[o],i.data));i.update(r,e)}return n},r}(),cr._layerid=0,br.SymbolGroup=cr,S.prototype.addSymbols=function(t){return t.map=this,new 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Balthasart, Behrmann, BlurFilter, Bubble, CEA, CantersModifiedSinusoidalI, Circle, CohenSutherland, Conic, Cylindrical, EckertIV, EquidistantAzimuthal, Equirectangular, Filter, GallPeters, GlowFilter, GoodeHomolosine, Hatano, HoboDyer, HtmlLabel, Icon, K, Kartograph, LAEA, LCC, LabeledBubble, LatLon, Line, LinearScale, LogScale, LonLat, Loximuthal, MapLayer, MapLayerPath, Mercator, Mollweide, NaturalEarth, Nicolosi, Orthographic, Path, PieChart, Proj, PseudoConic, PseudoCylindrical, QuantileScale, REbraces, REcomment_string, REfull, REmunged, Robinson, Satellite, Scale, Sinusoidal, SqrtScale, StackedBarChart, Stereographic, SvgLabel, Symbol, SymbolGroup, View, WagnerIV, WagnerV, Winkel3, drawPieChart, filter, hex2rgb, kartograph, log, map_layer_path_uid, munge, munged, parsedeclarations, resolve, restore, root, uid, warn, __point_in_polygon, __proj, __type, _base, _base1, _ref, _ref1, _ref10, _ref11, _ref12, _ref13, _ref14, _ref15, _ref16, _ref17, _ref18, _ref19, _ref2, _ref20, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8, _ref9, + var $, Aitoff, Azimuthal, BBox, Balthasart, Behrmann, BlurFilter, Bubble, CEA, CantersModifiedSinusoidalI, Circle, CohenSutherland, Conic, Cylindrical, EckertIV, EquidistantAzimuthal, Equirectangular, Filter, GallPeters, GlowFilter, GoodeHomolosine, Hatano, HoboDyer, HtmlLabel, Icon, K, Kartograph, LAEA, LCC, LabeledBubble, LatLon, Line, LinearScale, LogScale, LonLat, Loximuthal, MapLayer, MapLayerPath, Mercator, Mollweide, NaturalEarth, Nicolosi, Orthographic, Path, PieChart, Proj, PseudoConic, PseudoCylindrical, QuantileScale, REbraces, REcomment_string, REfull, REmunged, Robinson, Satellite, Scale, Sinusoidal, SqrtScale, StackedBarChart, Stereographic, SvgLabel, Symbol, SymbolGroup, View, WagnerIV, WagnerV, Winkel3, drawPieChart, filter, hex2rgb, kartograph, log, map_layer_path_uid, munge, munged, parsedeclarations, resolve, restore, root, uid, warn, __area, __is_clockwise, __point_in_polygon, __proj, __type, _base, _base1, _ref, _ref1, _ref10, _ref11, _ref12, _ref13, _ref14, _ref15, _ref16, _ref17, _ref18, _ref19, _ref2, _ref20, _ref3, _ref4, _ref5, _ref6, _ref7, _ref8, _ref9, __hasProp = {}.hasOwnProperty, __extends = function(child, parent) { for (var key in parent) { if (__hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; }, __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; }, @@ -1597,14 +1597,21 @@ represents complex polygons (aka multi-polygons) */ function Path(type, contours, closed) { - var self; + var cnt, self, _i, _len; if (closed == null) { closed = true; } self = this; self.type = type; - self.contours = contours; + self.contours = []; + for (_i = 0, _len = contours.length; _i < _len; _i++) { + cnt = contours[_i]; + if (!__is_clockwise(cnt)) { + cnt.reverse(); + } + self.contours.push(cnt); + } self.closed = closed; } @@ -1649,7 +1656,7 @@ }; Path.prototype.area = function() { - var area, cnt, i, me, _i, _j, _len, _ref5, _ref6; + var area, cnt, me, _i, _len, _ref5; me = this; if (me.areas != null) { @@ -1660,12 +1667,7 @@ _ref5 = me.contours; for (_i = 0, _len = _ref5.length; _i < _len; _i++) { cnt = _ref5[_i]; - area = 0; - for (i = _j = 0, _ref6 = cnt.length - 2; 0 <= _ref6 ? _j <= _ref6 : _j >= _ref6; i = 0 <= _ref6 ? ++_j : --_j) { - area += cnt[i][0] * cnt[i + 1][1] - cnt[i + 1][0] * cnt[i][1]; - } - area *= .5; - area = area; + area = __area(cnt); me.areas.push(area); me._area += area; } @@ -1685,6 +1687,11 @@ cnt_orig = me.contours[i]; cnt = []; l = cnt_orig.length; + a = me.areas[i]; + k = a / area; + if (k === 0) { + continue; + } for (j = _j = 0, _ref6 = l - 1; 0 <= _ref6 ? _j <= _ref6 : _j >= _ref6; j = 0 <= _ref6 ? ++_j : --_j) { p0 = cnt_orig[j]; p1 = cnt_orig[(j + 1) % l]; @@ -1704,7 +1711,6 @@ } } } - a = me.areas[i]; x = y = x_ = y_ = 0; l = cnt.length; _lengths = []; @@ -1724,7 +1730,6 @@ x += w * p0[0]; y += w * p0[1]; } - k = a / area; cx += x * k; cy += y * k; } @@ -1929,6 +1934,25 @@ return Math.abs(angle) >= pi; }; + __is_clockwise = function(contour) { + return __area(contour) > 0; + }; + + __area = function(contour) { + var i, n, s, x1, x2, y1, y2, _i; + + s = 0; + n = contour.length; + for (i = _i = 0; 0 <= n ? _i < n : _i > n; i = 0 <= n ? ++_i : --_i) { + x1 = contour[i][0]; + y1 = contour[i][1]; + x2 = contour[(i + 1) % n][0]; + y2 = contour[(i + 1) % n][1]; + s += x1 * y2 - x2 * y1; + } + return s *= 0.5; + }; + /* kartograph - a svg mapping library Copyright (C) 2011 Gregor Aisch diff --git a/kartograph-0.8.2.min.js b/kartograph-0.8.2.min.js new file mode 100644 index 0000000..cca8ea1 --- /dev/null +++ b/kartograph-0.8.2.min.js @@ -0,0 +1,3 @@ +!function(){function t(){var t={},e=[],n=1,o=1;return t.size=function(r){return arguments.length?(o=r,t):o},t.iterations=function(r){return arguments.length?(n=r,t):n},t.add=function(r){return 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t,r,e,o,i,a,s,l,u,p,h,c,f,d,y,m,v,g,_,b,x,w,M,P,C,j,A,B,L,S,k,I,N,G,z,E,T,R,F,V,O,H,X,q,D,U,Q;if(n=this,null==(H=n.osymbols)&&(n.osymbols=n.symbols),u=3,t=n.type,le.call(t.props,"radius")<0)return Sr('noverlap layout only available for symbols with property "radius"'),void 0;for(j=n.osymbols.slice(),null!=n.clusteringOpts&&(L=n.clusteringOpts.tolerance,f=n.clusteringOpts.maxRatio),null==L&&(L=.05),null==f&&(f=.8),s=N=0,X=u-1;X>=0?X>=N:N>=X;s=X>=0?++N:--N){for(j.sort(function(t,r){return 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t,r,o,i,a,s,l,u,p,h,c;for(n=this,i=n.tooltip,h=n.symbols,s=0,u=h.length;u>s;s++)for(o=h[s],t={position:{target:"mouse",viewport:e(window),adjust:{x:7,y:7}},show:{delay:20},content:{},events:{show:function(t,r){return e(".qtip").filter(function(){return this!==r.elements.tooltip.get(0)}).hide()}}},a=i(o.data,o.key),"string"===zr(a)?t.content.text=a:"array"===zr(a)&&(t.content.title=a[0],t.content.text=a[1]),c=o.nodes(),l=0,p=c.length;p>l;l++)r=c[l],e(r).qtip(t)},r.prototype.onResize=function(){var t,r,e,o;for(n=this,n.layout(),o=n.symbols,r=0,e=o.length;e>r;r++)t=o[r],t.update()},r.prototype.update=function(t,r,e){var o,i,a,s,l,u,p,h;for(n=this,null==t&&(t={}),p=n.symbols,a=0,l=p.length;l>a;a++){for(i=p[a],h=n.type.props,s=0,u=h.length;u>s;s++)o=h[s],null!=t[o]?i[o]=n._evaluate(t[o],i.data):null!=n[o]&&(i[o]=n._evaluate(n[o],i.data));i.update(r,e)}return n},r}(),cr._layerid=0,br.SymbolGroup=cr,S.prototype.addSymbols=function(t){return t.map=this,new 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100644 --- a/package.json +++ b/package.json @@ -1,7 +1,7 @@ { "name" : "kartograph-js", "description" : "JavaScript library for SVG mapping", - "version" : "0.8.1", + "version" : "0.8.2", "author" : "Gregor Aisch", "homepage" : "http://kartograph.org", "keywords" : ["svg", "map", "raphael"], diff --git a/src/core/path.coffee b/src/core/path.coffee index 99e3b5a..cbaa619 100644 --- a/src/core/path.coffee +++ b/src/core/path.coffee @@ -25,7 +25,11 @@ class Path constructor: (type, contours, closed=true) -> self = @ self.type = type - self.contours = contours + self.contours = [] + for cnt in contours + if not __is_clockwise cnt + cnt.reverse() + self.contours.push cnt self.closed = closed clipToBBox: (bbox) -> @@ -60,11 +64,7 @@ class Path me.areas = [] me._area = 0 for cnt in me.contours - area = 0 - for i in [0..cnt.length-2] - area += cnt[i][0]*cnt[i+1][1] - cnt[i+1][0]*cnt[i][1] - area *= .5 - area = area + area = __area cnt me.areas.push area me._area += area me._area @@ -82,6 +82,11 @@ class Path cnt = [] l = cnt_orig.length + a = me.areas[i] + k = a/area + if k == 0 + continue + for j in [0..l-1] p0 = cnt_orig[j] p1 = cnt_orig[(j+1)%l] @@ -98,7 +103,6 @@ class Path cnt.push sp # insert new points in between - a = me.areas[i] x = y = x_ = y_ = 0 l = cnt.length # at first compute total edge length @@ -119,7 +123,6 @@ class Path x += w * p0[0] y += w * p0[1] - k = a/area cx += x * k cy += y * k me._centroid = [cx,cy] @@ -272,5 +275,21 @@ __point_in_polygon = (polygon, p) -> while dtheta < -pi dtheta += twopi angle += dtheta - return Math.abs(angle) >= pi + Math.abs(angle) >= pi + + +__is_clockwise = (contour) -> + __area(contour) > 0 + + +__area = (contour) -> + s = 0 + n = contour.length + for i in [0...n] + x1 = contour[i][0] + y1 = contour[i][1] + x2 = contour[(i+1)%n][0] + y2 = contour[(i+1)%n][1] + s += x1 * y2 - x2 * y1 + s *= 0.5