adding opacity to isosurface

Author: archmoj

src/traces/isosurface/attributes.js

@@ -235,10 +235,11 @@ colorscaleAttrs('', {
 
     colorbar: colorbarAttrs,
 
-    contour: meshAttrs.contour,
+    opacity: meshAttrs.opacity,
     lightposition: meshAttrs.lightposition,
     lighting: meshAttrs.lighting,
     flatshading: meshAttrs.flatshading,
+    contour: meshAttrs.contour,
 
     hoverinfo: extendFlat({}, baseAttrs.hoverinfo)
 }), 'calc', 'nested');

src/traces/isosurface/convert.js

@@ -115,7 +115,7 @@ proto.update = function(data) {
         fresnel: data.lighting.fresnel,
         vertexNormalsEpsilon: data.lighting.vertexnormalsepsilon,
         faceNormalsEpsilon: data.lighting.facenormalsepsilon,
-        opacity: 1, // Note: no need to create transparent surfaces
+        opacity: data.opacity,
         contourEnable: data.contour.show,
         contourColor: str2RgbaArray(data.contour.color).slice(0, 3),
         contourWidth: data.contour.width,

src/traces/isosurface/defaults.js

@@ -95,7 +95,8 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
         'lightposition.x',
         'lightposition.y',
         'lightposition.z',
-        'flatshading'
+        'flatshading',
+        'opacity'
     ].forEach(function(x) { coerce(x); });
 
     colorscaleDefaults(traceIn, traceOut, layout, coerce, {prefix: '', cLetter: 'c'});