Merge pull request #478 from Kitware/fix_volume_visibility

fix(Rendering): fix volume visibility

Author: martinken

Sources/Filters/General/AppendPolyData/test/testAppendPolyData.js

@@ -8,7 +8,6 @@ import vtkPlaneSource     from 'vtk.js/Sources/Filters/Sources/PlaneSource';
 import vtkCalculator      from 'vtk.js/Sources/Filters/General/Calculator';
 
 import vtkActor               from 'vtk.js/Sources/Rendering/Core/Actor';
-import vtkDataArray           from 'vtk.js/Sources/Common/Core/DataArray';
 import vtkMapper              from 'vtk.js/Sources/Rendering/Core/Mapper';
 import vtkOpenGLRenderWindow  from 'vtk.js/Sources/Rendering/OpenGL/RenderWindow';
 import vtkRenderWindow        from 'vtk.js/Sources/Rendering/Core/RenderWindow';

Sources/Rendering/Core/Glyph3DMapper/test/testGlyph3DMapper.png

@@ -33,6 +33,19 @@ function vtkOpenGLVolume(publicAPI, model) {
     }
   };
 
+  publicAPI.traverseVolumePass = (renderPass) => {
+    if (!model.renderable ||
+        !model.renderable.getVisibility()) {
+      return;
+    }
+
+    publicAPI.apply(renderPass, true);
+
+    model.children[0].traverse(renderPass);
+
+    publicAPI.apply(renderPass, false);
+  };
+
   // Renders myself
   publicAPI.volumePass = (prepass) => {
     if (!model.renderable || !model.renderable.getVisibility()) {