Make proper fill behaviour

Author: dy

src/traces/scattergl/index.js

@@ -574,8 +574,11 @@ ScatterGl.scene = function getScene(container, subplot) {
 
         // draw traces in proper order
         scene.draw = function draw() {
-            for(var i = 0; i < scene.count; i++) {
+            var i;
+            for(i = 0; i < scene.count; i++) {
                 if(scene.fill2d) scene.fill2d.draw(i);
+            }
+            for(i = 0; i < scene.count; i++) {
                 if(scene.line2d) {
                     scene.line2d.draw(i);
                 }
@@ -786,7 +789,7 @@ ScatterGl.plot = function plot(container, subplot, cdata) {
         if(scene.fill2d) {
             scene.fillOptions.forEach(function(fillOptions, i) {
                 var cdscatter = cdata[i];
-                if(!cdscatter || !cdscatter[0] || !cdscatter[0].trace) return;
+                if(!fillOptions || !cdscatter || !cdscatter[0] || !cdscatter[0].trace) return;
                 var cd = cdscatter[0];
                 var trace = cd.trace;
                 var stash = cd.t;