do not apply line --> marker color defaulting on scatter3d plots

Author: monfera

src/traces/scatter/marker_defaults.js

@@ -19,13 +19,14 @@ var subTypes = require('./subtypes');
 // common to 'scatter', 'scatter3d', 'scattergeo' and 'scattergl'
 module.exports = function markerDefaults(traceIn, traceOut, defaultColor, layout, coerce) {
     var isBubble = subTypes.isBubble(traceIn),
+        isScatter3d = traceIn.type === 'scatter3d',
         lineColor = (traceIn.line || {}).color,
         lineColorscale = (traceIn.line || {}).colorscale,
         defaultColorscale,
         defaultMLC;
 
-    if(lineColor) defaultColor = lineColor;
-    if(lineColorscale) defaultColorscale = lineColorscale;
+    if(!isScatter3d && lineColor) defaultColor = lineColor;
+    if(!isScatter3d && lineColorscale) defaultColorscale = lineColorscale;
 
     coerce('marker.symbol');
     coerce('marker.opacity', isBubble ? 0.7 : 1);
@@ -42,7 +43,7 @@ module.exports = function markerDefaults(traceIn, traceOut, defaultColor, layout
     // if there's a line with a different color than the marker, use
     // that line color as the default marker line color
     // mostly this is for transparent markers to behave nicely
-    if(lineColor && (traceOut.marker.color !== lineColor)) {
+    if(!isScatter3d && lineColor && (traceOut.marker.color !== lineColor)) {
         defaultMLC = lineColor;
     }
     else if(isBubble) defaultMLC = Color.background;

test/image/baselines/gl3d_projection-traces.png

@@ -22,7 +22,7 @@
     "type":"scatter3d"
   }],
   "layout": {
-    "title": "Markers should default to line color, partly to evade Z fighting",
+    "title": "Markers should not default to line color, partly to evade Z fighting",
     "height":758,
     "width":1310
   }

test/image/baselines/gl3d_scatter-color-array-with-default-marker.png

@@ -11,7 +11,7 @@
     "type":"scatter3d"
   }],
   "layout": {
-    "title": "Specific color chosen for the line should transfer to markers to evade Z fighting",
+    "title": "Specific color chosen for the line should not transfer to markers",
     "height":758,
     "width":1310
   }

test/image/baselines/gl3d_scatter-color-mono-with-default-marker.png

@@ -15,7 +15,7 @@
     "type":"scatter3d"
   }],
   "layout": {
-    "title": "Markers should default to line color, partly to evade Z fighting",
+    "title": "Markers should not default to line color",
     "height":758,
     "width":1310
   }