new plugin: cross links

this plugin colors links red if they are crossing a drawnline.
any yellow if they are inside a drawn polygon.
(requires DrawTools)

plugins/cross_link.user.js

@@ -0,0 +1,188 @@
+// ==UserScript==
+// @id             iitc-plugin-cross-links@mcben
+// @name           IITC plugin: cross links
+// @category       Layer
+// @version        1.0.@@DATETIMEVERSION@@
+// @namespace      https://github.com/jonatkins/ingress-intel-total-conversion
+// @updateURL      @@UPDATEURL@@
+// @downloadURL    @@DOWNLOADURL@@
+// @description    [McBen] requires drawtool! coloring of link collision
+// @include        https://www.ingress.com/intel*
+// @include        http://www.ingress.com/intel*
+// @match          https://www.ingress.com/intel*
+// @match          http://www.ingress.com/intel*
+// @grant          none
+// ==/UserScript==
+
+@@PLUGINSTART@@
+
+// PLUGIN START ////////////////////////////////////////////////////////
+
+// use own namespace for plugin
+window.plugin.crossLinks = function() {};
+
+window.plugin.crossLinks.STYLE_LINECOLLISION = {color: '#f22', weight: 4};
+window.plugin.crossLinks.STYLE_INSIDEPOLY = {color: '#ff2', weight: 4};
+
+
+function relativeCCW(x1,y1,x2,y2, px, py) {
+   // code from java.awt
+         x2 -= x1;
+         y2 -= y1;
+         px -= x1;
+         py -= y1;
+
+         var ccw = px * y2 - py * x2;
+
+         if (ccw == 0.0) {
+             ccw = px * x2 + py * y2;
+
+             if (ccw > 0.0) {
+                 px -= x2;
+                 py -= y2;
+                 ccw = px * x2 + py * y2;
+
+                 if (ccw < 0.0) {
+                     ccw = 0.0;
+                 }
+             }
+         }
+         return (ccw < 0.0) ? -1 : ((ccw > 0.0) ? 1 : 0);
+     }
+
+function linesIntersect(x1,y1,x2,y2,x3,y3,x4,y4) {
+   // code from java.awt
+   return (    (relativeCCW(x1, y1, x2, y2, x3, y3) * relativeCCW(x1, y1, x2, y2, x4, y4) <= 0)
+            && (relativeCCW(x3, y3, x4, y4, x1, y1) * relativeCCW(x3, y3, x4, y4, x2, y2) <= 0));
+}
+
+function isCrossing(p1,p2,q1,q2) {
+    return linesIntersect( p1.lat,p1.lng,p2.lat,p2.lng,
+                           q1.lat,q1.lng,q2.lat,q2.lng);
+}
+
+window.plugin.crossLinks.testLine = function (drawline, link) {
+
+    var linkline= L.geodesicConvertLines(link._latlngs,0);
+
+    for (var j=0;j<linkline.length-1;++j) {
+      for (var i=0;i<drawline.length-1;++i) {
+        if (isCrossing(linkline[j],linkline[j+1], drawline[i],drawline[i+1])) {
+            return true;
+        }
+      }
+    }
+
+    return false;
+}
+
+function isPointInPolygon(poly, point)  {
+    // src: http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
+    var c = false;
+    var p2 = poly[0];
+    for (var i = 1; i < poly.length; ++i) {
+        var p1 = poly[i];
+        if ( ((p1.lng > point.lng) != (p2.lng>point.lng)) &&
+             (point.lat < (p2.lat - p1.lat)*(point.lng-p1.lng) / (p2.lng-p1.lng) + p1.lat))
+                c = !c;
+
+        p2 = p1;
+  }
+  return c;
+}
+
+window.plugin.crossLinks.testPolygons = function (polygons, link) {
+
+    var linkline= L.geodesicConvertLines(link._latlngs,0);
+
+    for (var pidx=0;pidx<polygons.length;++pidx) {
+        if (isPointInPolygon(polygons[pidx],linkline[0])) return true;
+    }
+
+    return false;
+  }
+
+window.plugin.crossLinks.onLinkAdded = function (data) {
+
+    var link = data.link;
+
+    window.plugin.drawTools.drawnItems.eachLayer( function(layer) {
+       if (layer instanceof L.GeodesicPolygon) {
+            var drawline  = L.geodesicConvertLines(layer.getLatLngs(),true);
+            drawline.push(drawline[0]);
+            var polyline= [drawline];
+            if (window.plugin.crossLinks.testLine(drawline, link)) {
+                link.setStyle (window.plugin.crossLinks.STYLE_LINECOLLISION);
+            } else if (window.plugin.crossLinks.testPolygons([drawline], link)) {
+                link.setStyle (window.plugin.crossLinks.STYLE_INSIDEPOLY);
+            }
+        } else if (layer instanceof L.GeodesicPolyline) {
+            var drawline  = L.geodesicConvertLines(layer.getLatLngs(),false);
+            if (window.plugin.crossLinks.testLine(drawline, link)) {
+                link.setStyle (window.plugin.crossLinks.STYLE_LINECOLLISION);
+            }
+        }
+    });
+}
+
+window.plugin.crossLinks.checkAllLinks = function() {
+  console.debug("Cross-Links: checking links");
+  
+  // get all lines
+  var drawpolygons = [];
+  var drawlines = [];
+  window.plugin.drawTools.drawnItems.eachLayer( function(layer) {
+      if (layer instanceof L.GeodesicPolyline) {
+          var newlines  = L.geodesicConvertLines(layer.getLatLngs(),false);
+          drawlines = drawlines.concat(newlines);
+      } else if (layer instanceof L.GeodesicPolygon) {
+          var newlines  = L.geodesicConvertLines(layer.getLatLngs(),true);
+          newlines.push(newlines[0]);
+          drawlines = drawlines.concat(newlines);
+          drawpolygons.push(newlines);
+      }
+  });
+
+  // check all links
+  $.each(window.links, function(guid, link) {
+      if (window.plugin.crossLinks.testLine(drawlines, link)) {
+	    link.setStyle (window.plugin.crossLinks.STYLE_LINECOLLISION);
+      } else if (window.plugin.crossLinks.testPolygons(drawpolygons, link)) {
+	    link.setStyle (window.plugin.crossLinks.STYLE_INSIDEPOLY);
+      } else {
+        link.setStyle ({color: COLORS[link.options.team], weight: 2});
+      }
+    });
+  }
+
+
+window.plugin.crossLinks.drawTools_save = function() {
+  window.plugin.crossLinks.ori_drawTools_save();
+  window.plugin.crossLinks.checkAllLinks();
+ }
+
+window.plugin.crossLinks.drawTools_load = function() {
+  window.plugin.crossLinks.ori_drawTools_load();
+  window.plugin.crossLinks.checkAllLinks();
+ }
+
+
+var setup = function() {
+  console.debug("Cross-Links: init");
+  if (window.plugin.drawTools === undefined) {
+      alert("'Cross-Links' requires 'draw-tools'");
+      return;
+  }
+
+  // hook 'drawTools'
+  window.plugin.crossLinks.ori_drawTools_save = window.plugin.drawTools.save;
+  window.plugin.drawTools.save = window.plugin.crossLinks.drawTools_save;
+  window.plugin.crossLinks.ori_drawTools_load = window.plugin.drawTools.load;
+  window.plugin.drawTools.load = window.plugin.crossLinks.drawTools_load;
+
+  window.addHook('linkAdded', window.plugin.crossLinks.onLinkAdded);
+}
+
+// PLUGIN END //////////////////////////////////////////////////////////
+
+@@PLUGINEND@@