cross links plugin

- fixed indentation
- fixed off-by-one error on polygons
- made lines dashed, and less opaque - so it's easier to see the colour of the link they're drawn on

plugins/cross_link.user.js

@@ -34,6 +34,10 @@ var near_0 = 1e-6;
 
 function greatCircleArcIntersect(a0,a1,b0,b1) {
 
+    function length(x, y, z) {
+        return Math.sqrt(x * x + y * y + z * z);
+    }
+
     // Order points
     if (a1.lat < a0.lat) { var t=a1;a1=a0;a0=t;}
     if (b1.lat < b0.lat) { var t=b1;b1=b0;b0=t;}
@@ -128,17 +132,7 @@ function greatCircleArcIntersect(a0,a1,b0,b1) {
     }
 }
 
-function length(x, y, z) {
-  return Math.sqrt(x * x + y * y + z * z);
-}
 
-/*
- smallCircleIntersect
- idea:
-  - build the plane of the small circle: normalvector (center) and p=center+radian // E:n1*x+n2*y+n3*z=n1*p1+n2*p2+n3*p3
-  - calc distance to both points // d=(n1*x+n2*y+n3*z- (n1*p1+n2*p2+n3*p3)) / length(n)
-  - both >0 = inside ; one >0 = collision
-*/
 
 window.plugin.crossLinks.testPolyLine = function (polyline, link,closed) {
 
@@ -150,7 +144,7 @@ window.plugin.crossLinks.testPolyLine = function (polyline, link,closed) {
     }
 
     if (closed) {
-        if (greatCircleArcIntersect(a[0],a[1],b[b.length],b[0])) return true;
+        if (greatCircleArcIntersect(a[0],a[1],b[b.length-1],b[0])) return true;
     }
 
     return false;
@@ -198,9 +192,10 @@ window.plugin.crossLinks.showLink = function(link) {
 
     var poly = L.geodesicPolyline(link.getLatLngs(), {
        color: '#f11',
-       opacity: 0.7,
-       weight: 4,
+       opacity: 0.5,
+       weight: 5,
        clickable: false,
+       dashArray: [8,8],
 
        guid: link.options.guid
     });