add defaultCoreMaterialItem()

GUI/Model/Sample/MaterialModel.cpp

@@ -147,10 +147,19 @@ MaterialItem* MaterialModel::defaultMaterialItem() const
     return materialItems().front();
 }
 
+MaterialItem *MaterialModel::defaultCoreMaterialItem() const
+{
+    for(auto* material : materialItems())
+        if(material->matItemName() == material_name_map.key(DefaultMaterials::Particle_Core))
+            return material;
+
+    return defaultMaterialItem();
+}
+
 MaterialItem *MaterialModel::defaultParticleMaterialItem() const
 {
     for(auto* material : materialItems())
-        if(material->matItemName() == "Particle")
+        if(material->matItemName() == material_name_map.key(DefaultMaterials::Particle))
             return material;
 
     return defaultMaterialItem();

GUI/Model/Sample/MaterialModel.h

@@ -47,6 +47,7 @@ public:
     const QVector<MaterialItem*>& materialItems() const;
 
     MaterialItem* defaultMaterialItem() const;
+    MaterialItem* defaultCoreMaterialItem() const;
     MaterialItem* defaultParticleMaterialItem() const;
 
     void removeMaterialItem(MaterialItem* materialItem);