Prevent scatter3d to only display the first point on hover: issue 3258

package.json

@@ -80,7 +80,7 @@
     "gl-plot2d": "^1.4.0",
     "gl-plot3d": "^1.6.0",
     "gl-pointcloud2d": "^1.0.1",
-    "gl-scatter3d": "^1.1.0",
+    "gl-scatter3d": "^1.1.2",
     "gl-select-box": "^1.0.2",
     "gl-spikes2d": "^1.0.1",
     "gl-streamtube3d": "^1.1.1",

test/image/mocks/gl3d_multiple-scatter3d-traces.json

@@ -0,0 +1,40 @@
+{
+    "data": [
+        {
+            "type": "scatter3d",
+            "mode": "markers",
+            "marker": {"opacity": 1.0},
+            "x": [-1, 0, 1],
+            "y": [0, 0, 0],
+            "z": [0, 0, 0]
+        },
+        {
+            "type": "scatter3d",
+            "mode": "markers",
+            "marker": {"opacity": 1.0},
+            "x": [-1, 0, 1],
+            "y": [0, 0, 0],
+            "z": [10, 10, 10]
+        },
+        {
+            "type": "scatter3d",
+            "mode": "markers",
+            "marker": {"opacity": 1.0},
+            "x": [-1, 0, 1],
+            "y": [0, 0, 0],
+            "z": [-10, -10, -10]
+        }
+    ],
+    "layout": {
+        "title": "Hovering over data points of multiple scatter3d traces",
+        "width": 600,
+        "height": 400,
+        "scene": {
+            "camera": {
+                "eye": {"x": 1, "y": 1, "z": 1},
+                "center": {"x": 0, "y": 0, "z": 0},
+                "up": {"x": 0, "y": 0, "z": 1}
+            }
+        }
+    }
+}

test/jasmine/tests/gl3d_plot_interact_test.js

@@ -25,6 +25,7 @@ describe('Test gl3d plots', function() {
     var gd, ptData;
 
     var mock = require('@mocks/gl3d_marker-arrays.json');
+    var multipleScatter3dMock = require('@mocks/gl3d_multiple-scatter3d-traces.json');
 
     // lines, markers, text, error bars and surfaces each
     // correspond to one glplot object
@@ -74,6 +75,35 @@ describe('Test gl3d plots', function() {
         destroyGraphDiv();
     });
 
+    it('@noCI @gl should display correct hover labels of the second point of the very first scatter3d trace', function(done) {
+        var _mock = Lib.extendDeep({}, multipleScatter3dMock);
+
+        function _hover() {
+            mouseEvent('mouseover', 300, 200);
+            return delay(20)();
+        }
+
+        Plotly.plot(gd, _mock)
+        .then(delay(20))
+        .then(function() {
+            gd.on('plotly_hover', function(eventData) {
+                ptData = eventData.points[0];
+            });
+        })
+        .then(_hover)
+        .then(delay(20))
+        .then(function() {
+            assertHoverLabelContent(
+                {
+                    nums: ['x: 0', 'y: 0', 'z: 0'].join('\n'),
+                    name: 'trace 0'
+                }
+            );
+        })
+        .catch(failTest)
+        .then(done);
+    });
+
     it('@noCI @gl should display correct hover labels and emit correct event data (scatter3d case)', function(done) {
         var _mock = Lib.extendDeep({}, mock2);