test(mapper2d): example for scalar coloring with Mapper2D

Author: sankhesh

Examples/Rendering/Actor2D/index.js

@@ -88,23 +88,34 @@ mapper2D.setInputConnection(filter.getOutputPort());
 const c = vtkCoordinate.newInstance();
 c.setCoordinateSystemToWorld();
 mapper2D.setTransformCoordinate(c);
-mapper2D.setScalarVisibility(false);
+mapper2D.setScalarVisibility(true);
+mapper2D.setScalarMode(2);
+const mapper2 = vtkMapper2D.newInstance();
+mapper2.setInputConnection(coneSource.getOutputPort());
+mapper2.setTransformCoordinate(c);
+mapper2.setScalarVisibility(false);
 
 const actor = vtkActor.newInstance();
 actor.setMapper(mapper);
+actor.getProperty().setRepresentationToWireframe();
 actor.getProperty().setEdgeVisibility(true);
 actor.getProperty().setEdgeColor([0.5, 0, 0.6]);
 actor.getProperty().setLineWidth(3);
 const actor2D = vtkActor2D.newInstance();
 actor2D.setMapper(mapper2D);
 actor2D.getProperty().setColor([1, 0, 0]);
-actor2D.getProperty().setOpacity(0.5);
+actor2D.getProperty().setOpacity(0.75);
 actor2D.getProperty().setLineWidth(3);
 actor2D.getProperty().setDisplayLocation(DisplayLocation.FOREGROUND);
 actor2D.getProperty().setRepresentation(Representation.SURFACE);
+const actor2 = vtkActor2D.newInstance();
+actor2.setMapper(mapper2);
+actor2.getProperty().setOpacity(0.3);
 
 renderer.addActor(actor);
 renderer.addActor2D(actor2D);
+renderer.addActor2D(actor2);
+actor2D.setLayerNumber(2);
 renderer.resetCamera();
 renderWindow.render();
 fpsMonitor.update();

Sources/Rendering/Core/Actor2D/test/testActor2D.js

@@ -40,7 +40,7 @@ test.onlyIfWebGL('Test Actor2D', (t) => {
 
   const actor2D = gc.registerResource(vtkActor2D.newInstance());
   actor2D.getProperty().setColor([0.5, 0.8, 0]);
-  actor2D.getProperty().setOpacity(0.3);
+  actor2D.getProperty().setOpacity(0.5);
   actor2D.getProperty().setDisplayLocation(DisplayLocation.FOREGROUND);
   actor2D.getProperty().setRepresentation(Representation.SURFACE);
   actor2D.setLayerNumber(2);

Sources/Rendering/OpenGL/PolyDataMapper2D/index.js

@@ -350,7 +350,6 @@ function vtkOpenGLPolyDataMapper2D(publicAPI, model) {
         '//VTK::Color::Impl',
         colorImpl.concat([
           '  diffuseColor = vertexColorVSOutput.rgb;',
-          '  ambientColor = vertexColorVSOutput.rgb;',
           '  opacity = opacity*vertexColorVSOutput.a;',
         ])
       ).result;