+ fixes #0001363: VRML export can produce corrupt files

src/Gui/SoFCDB.cpp

@@ -90,6 +90,7 @@ void Gui::SoFCDB::init()
     SoFCVectorizeU3DAction          ::initClass();
     SoHighlightElementAction        ::initClass();
     SoSelectionElementAction        ::initClass();
+    SoVRMLAction                    ::initClass();
     SoSkipBoundingGroup             ::initClass();
     SoTextLabel                     ::initClass();
     SoStringLabel                   ::initClass();

src/Gui/SoFCUnifiedSelection.cpp

@@ -46,6 +46,7 @@
 #include <Inventor/elements/SoElements.h>
 #include <Inventor/elements/SoFontNameElement.h>
 #include <Inventor/elements/SoFontSizeElement.h>
+#include <Inventor/elements/SoMaterialBindingElement.h>
 #include <Inventor/elements/SoModelMatrixElement.h>
 #include <Inventor/elements/SoShapeStyleElement.h>
 #include <Inventor/elements/SoProfileCoordinateElement.h>
@@ -58,6 +59,8 @@
 #include <Inventor/events/SoMouseButtonEvent.h>
 #include <Inventor/misc/SoState.h>
 #include <Inventor/misc/SoChildList.h>
+#include <Inventor/nodes/SoMaterial.h>
+#include <Inventor/nodes/SoMaterialBinding.h>
 #include <Inventor/events/SoLocation2Event.h>
 #include <Inventor/SoPickedPoint.h>
 
@@ -682,3 +685,43 @@ const SoDetail* SoSelectionElementAction::getElement() const
 {
     return this->_det;
 }
+
+// ---------------------------------------------------------------
+
+SO_ACTION_SOURCE(SoVRMLAction);
+
+void SoVRMLAction::initClass()
+{
+    SO_ACTION_INIT_CLASS(SoVRMLAction,SoAction);
+
+    SO_ENABLE(SoVRMLAction, SoSwitchElement);
+
+    SO_ACTION_ADD_METHOD(SoNode,nullAction);
+
+    SO_ENABLE(SoVRMLAction, SoCoordinateElement);
+    SO_ENABLE(SoVRMLAction, SoMaterialBindingElement);
+    SO_ENABLE(SoVRMLAction, SoLazyElement);
+    SO_ENABLE(SoVRMLAction, SoShapeStyleElement);
+
+    SO_ACTION_ADD_METHOD(SoCoordinate3,callDoAction);
+    SO_ACTION_ADD_METHOD(SoMaterialBinding,callDoAction);
+    SO_ACTION_ADD_METHOD(SoMaterial,callDoAction);
+    SO_ACTION_ADD_METHOD(SoGroup,callDoAction);
+    SO_ACTION_ADD_METHOD(SoIndexedLineSet,callDoAction);
+    SO_ACTION_ADD_METHOD(SoIndexedFaceSet,callDoAction);
+    SO_ACTION_ADD_METHOD(SoPointSet,callDoAction);
+}
+
+SoVRMLAction::SoVRMLAction()
+{
+    SO_ACTION_CONSTRUCTOR(SoVRMLAction);
+}
+
+SoVRMLAction::~SoVRMLAction()
+{
+}
+
+void SoVRMLAction::callDoAction(SoAction *action,SoNode *node)
+{
+    node->doAction(action);
+}

src/Gui/SoFCUnifiedSelection.h

@@ -177,6 +177,24 @@ private:
     const SoDetail* _det;
 };
 
+/**
+ * @author Werner Mayer
+ */
+class GuiExport SoVRMLAction : public SoAction
+{
+    SO_ACTION_HEADER(SoVRMLAction);
+
+public:
+    SoVRMLAction();
+    ~SoVRMLAction();
+
+    static void initClass();
+
+private:
+    static void callDoAction(SoAction *action,SoNode *node);
+
+};
+
 
 } // namespace Gui
 

src/Gui/View3DInventorViewer.cpp

@@ -1041,6 +1041,8 @@ bool View3DInventorViewer::dumpToFile(const char* filename, bool binary) const
         if (fi.hasExtension("wrz"))
             binary = true;
 
+        SoVRMLAction vrml2;
+        vrml2.apply(pcViewProviderRoot);
         SoToVRML2Action tovrml2;
         tovrml2.apply(pcViewProviderRoot);
         SoVRMLGroup* vrmlRoot = tovrml2.getVRML2SceneGraph();

src/Mod/Part/Gui/SoBrepFaceSet.cpp

@@ -44,6 +44,7 @@
 # include <Inventor/actions/SoWriteAction.h>
 # include <Inventor/bundles/SoMaterialBundle.h>
 # include <Inventor/bundles/SoTextureCoordinateBundle.h>
+# include <Inventor/elements/SoLazyElement.h>
 # include <Inventor/elements/SoOverrideElement.h>
 # include <Inventor/elements/SoCoordinateElement.h>
 # include <Inventor/elements/SoGLCoordinateElement.h>
@@ -148,6 +149,35 @@ void SoBrepFaceSet::doAction(SoAction* action)
             }
         }
     }
+    else if (action->getTypeId() == Gui::SoVRMLAction::getClassTypeId()) {
+        // update the materialIndex field to match with the number of triangles if needed
+        SoState * state = action->getState();
+        Binding mbind = this->findMaterialBinding(state);
+        if (mbind == PER_PART) {
+            const SoLazyElement* mat = SoLazyElement::getInstance(state);
+            int numColor = 1;
+            int numParts = partIndex.getNum();
+            if (mat) {
+                numColor = mat->getNumDiffuse();
+                if (numColor == numParts) {
+                    int count = 0;
+                    const int32_t * indices = this->partIndex.getValues(0);
+                    for (int i=0; i<numParts; i++) {
+                        count += indices[i];
+                    }
+                    this->materialIndex.setNum(count);
+                    int32_t * matind = this->materialIndex.startEditing();
+                    int32_t k = 0;
+                    for (int i=0; i<numParts; i++) {
+                        for (int j=0; j<indices[i]; j++) {
+                            matind[k++] = i;
+                        }
+                    }
+                    this->materialIndex.finishEditing();
+                }
+            }
+        }
+    }
 
     inherited::doAction(action);
 }