rm node visitor

Core/Export/MaterialKeyHandler.cpp

@@ -16,24 +16,34 @@
 #include "Base/Util/Assert.h"
 #include "Sample/Material/Material.h"
 #include <algorithm>
+#include <iostream>
 #include <set>
 #include <stdexcept>
 
 void MaterialKeyHandler::insertMaterial(const Material* mat)
 {
+    std::cout << "MKH 0" << std::endl;
+    ASSERT(mat);
+    std::cout << "MKH insert " << mat->materialName() << std::endl;
     for (const auto& it : m_Mat2Unique)
         if (*it.second == *mat) {
             m_Mat2Unique.emplace(mat, it.second);
+            std::cout << "MKH duplicate entry" << std::endl;
             return;
         }
+    std::cout << "MKH 1" << std::endl;
     m_Mat2Unique.emplace(mat, mat);
+    std::cout << "MKH 2" << std::endl;
 
     const std::string key = "material_" + mat->materialName();
+    std::cout << "MKH key = " << key << std::endl;
     if (m_Key2Mat.count(key))
         throw std::runtime_error(
             "Material name " + mat->materialName()
             + " used more than once, which is not supported by Python exporter");
+    std::cout << "MKH 3" << std::endl;
     m_Key2Mat.emplace(key, mat);
+    std::cout << "MKH 4" << std::endl;
 }
 
 const std::string& MaterialKeyHandler::mat2key(const Material* mat) const