FIXED volume rendering for VTK8

modified so that VTK6 and VTK7 version is still available

sdk/actions/image/volumerendering/CMakeLists.txt

-# Note: add flag DISABLED to disable a specific action
 camitk_extension(ACTION_EXTENSION
                  NEEDS_QTXML
                  DEFINES COMPILE_VOLUME_RENDERING_ACTION_API

sdk/actions/image/volumerendering/VolumeRenderingAction.cpp

@@ -27,9 +27,15 @@
 // -- vtk stuff --
 #include <vtkImageCast.h>
 #include <vtkVolume.h>
-#include <vtkVolumeRayCastMapper.h>
 #include <vtkPiecewiseFunction.h>
+
+#if VTK_MAJOR_VERSION == 8
+#include <vtkFixedPointVolumeRayCastMapper.h>
+#else
+#include <vtkVolumeRayCastMapper.h>
 #include <vtkVolumeRayCastCompositeFunction.h>
+#endif
+
 #include <vtkColorTransferFunction.h>
 #include <vtkRenderWindowInteractor.h>
 #include <vtkRenderWindow.h>
@@ -59,12 +65,10 @@ VolumeRenderingAction::VolumeRenderingAction(ActionExtension* extension) : Actio
     myWidget = nullptr;
     volumeName = "volume-rendering";
 
-
     // Setting name, description and input component
     setName("Volume Rendering");
     setEmbedded(false);
-    setDescription(tr("Volume rendering of 3D medical image using ray casting<br/>\
-				   (Use Ctrl+R to render a selected image volume)"));
+    setDescription(tr("Volume rendering of 3D medical image using ray casting<br/>(Use Ctrl+R to render a selected image volume)"));
     setComponent("ImageComponent");
 
     // Setting classification family and tags
@@ -76,31 +80,14 @@ VolumeRenderingAction::VolumeRenderingAction(ActionExtension* extension) : Actio
     // add shortcut
     getQAction()->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_R));
     getQAction()->setShortcutContext(Qt::ApplicationShortcut);
-
-    /*
-    // Define default colors
-    defaultTransparencies.insert(  0, 0.0);
-    defaultTransparencies.insert(255, 1.0);
-
-    defaultColors.insert(  0, QColor(204,  77,  51, 255));
-    defaultColors.insert(255, QColor(128, 128, 128, 255));
-
-    defaultGradientOpacities.insert(0, 0.0);
-    defaultGradientOpacities.insert(90, 0.5);
-    defaultGradientOpacities.insert(150, 1.0);
-
-    defaultAmbiant	= 0.4;
-    defaultDiffuse	= 0.6;
-    defaultSpecular = 0.2;
-    */
 }
 
-// --------------- getWidget -------------------
+// --------------- getWidget ---------------
 QWidget* VolumeRenderingAction::getWidget() {
     return nullptr;
 }
 
-// --------------- apply -------------------
+// --------------- apply ---------------
 Action::ApplyStatus VolumeRenderingAction::apply() {
     foreach (Component* comp, getTargets()) {
         ImageComponent* input = dynamic_cast<ImageComponent*>(comp);
@@ -109,6 +96,7 @@ Action::ApplyStatus VolumeRenderingAction::apply() {
     return SUCCESS;
 }
 
+// --------------- process ---------------
 void VolumeRenderingAction::process(ImageComponent* comp) {
     bool isVisible	= comp->getVolumeRenderingChild()->getVisibility(InteractiveViewer::get3DViewer());
     bool existVR	= (comp->getVolumeRenderingChild()->getProp(volumeName) != NULL);
@@ -139,6 +127,7 @@ void VolumeRenderingAction::process(ImageComponent* comp) {
 }
 
 
+// --------------- createVolumeRendering ---------------
 void VolumeRenderingAction::createVolumeRendering(ImageComponent* comp) {
     // Get the transfer function from the widget
     QMap<int, double> transparencies = myWidget->getTransparencyPoints();
@@ -150,8 +139,8 @@ void VolumeRenderingAction::createVolumeRendering(ImageComponent* comp) {
     QMap<int, double> gradientOpacities = myWidget->getOpacityPoints();
     QMap<int, double>::const_iterator gradientIt;
 
-    double ambiant	= myWidget->getAmbiant();
-    double diffuse	= myWidget->getDiffuse();
+    double ambiant = myWidget->getAmbiant();
+    double diffuse = myWidget->getDiffuse();
     double specular = myWidget->getSpecular();
 
     // FILTER
@@ -166,16 +155,21 @@ void VolumeRenderingAction::createVolumeRendering(ImageComponent* comp) {
     magnitudeFilter->Update();
 
     // MAPPER
+#if VTK_MAJOR_VERSION == 8
+    vtkSmartPointer<vtkFixedPointVolumeRayCastMapper> volumeMapper = vtkSmartPointer<vtkFixedPointVolumeRayCastMapper>::New();
+    volumeMapper->SetInputData(magnitudeFilter->GetOutput());
+#else
     vtkSmartPointer<vtkVolumeRayCastMapper> volumeMapper = vtkSmartPointer<vtkVolumeRayCastMapper>::New();
     volumeMapper->SetInputData(magnitudeFilter->GetOutput());
-
+    
     // The volume will be displayed by ray-cast alpha compositing.
     // A ray-cast mapper is needed to do the ray-casting, and a
     // compositing function is needed to do the compositing along the ray.
     vtkSmartPointer<vtkVolumeRayCastCompositeFunction> rayCastFunction =
         vtkSmartPointer<vtkVolumeRayCastCompositeFunction>::New();
     volumeMapper->SetVolumeRayCastFunction(rayCastFunction);
-
+#endif    
+   
     // RENDERER
     // Here, there is only one renderer : the one of the volume, but contains many properties
     vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();