Set a different default light position for surface vs mesh

Author: monfera

src/traces/mesh3d/attributes.js

@@ -124,7 +124,11 @@ module.exports = {
     reversescale: colorscaleAttrs.reversescale,
     showscale: colorscaleAttrs.showscale,
 
-    lightposition: extendFlat({}, surfaceAtts.lightposition),
+    lightposition: {
+        'x': extendFlat({}, surfaceAtts.lightposition.x, {dflt: 1e5}),
+        'y': extendFlat({}, surfaceAtts.lightposition.y, {dflt: 1e5}),
+        'z': extendFlat({}, surfaceAtts.lightposition.z, {dflt: 0})
+    },
     lighting: extendFlat({
         vertexnormalsepsilon: {
             valType: 'number',

src/traces/surface/attributes.js

@@ -153,7 +153,7 @@ module.exports = {
             role: 'style',
             min: -1e5,
             max: 1e5,
-            dflt: 1e5,
+            dflt: 10,
             description: 'Numeric vector, representing the X coordinate for each vertex.'
         },
         y: {