scatter3d errorbars now fallback to default attributes if error_z is empty

Author: antoinerg

src/traces/scatter3d/convert.js

@@ -23,6 +23,7 @@ var DASH_PATTERNS = require('../../constants/gl3d_dashes');
 var MARKER_SYMBOLS = require('../../constants/gl3d_markers');
 
 var calculateError = require('./calc_errors');
+var errorBarsAttributes = require('../../components/errorbars/attributes');
 
 function LineWithMarkers(scene, uid) {
     this.scene = scene;
@@ -124,9 +125,9 @@ function calculateErrorParams(errors) {
         if(e && e.copy_zstyle !== false) e = errors[2];
         if(!e) continue;
 
-        capSize[i] = e.width / 2;  // ballpark rescaling
+        capSize[i] = (e.width || 0) / 2;  // ballpark rescaling
         color[i] = str2RgbaArray(e.color);
-        lineWidth = e.thickness;
+        lineWidth = (e.thickness || errorBarsAttributes.thickness.dflt);
 
     }
 

test/image/mocks/gl3d_errorbars_xy.json

@@ -0,0 +1,19 @@
+{
+    "data": [{
+        "type": "scatter3d",
+        "mode": "markers",
+        "x": [1],
+        "y": [1],
+        "z": [1],
+        "error_x": {
+            "type": "sqrt",
+            "thickness": 5
+        },
+        "error_y": {
+            "type": "sqrt",
+            "thickness": 5,
+            "color": "red"
+        }
+    }],
+    "layout": {}
+}