feat: multiple face rendering and geometry storing

src/Engine/Operator/AttributeHandle.h

@@ -54,7 +54,7 @@ public:
         data_->push_back(value);
     }
 
-    std::vector<T> getData() const
+    std::vector<T> getAllValues() const
     {
         return *data_;
     }

src/Engine/Operator/Geometry.cpp

@@ -10,6 +10,7 @@ geo::Geometry::Geometry()
 {
     addVector3Attribute(ga::AttrOwner::POINT, "P");
     addIntAttribute(ga::AttrOwner::VERTEX, "point");
+    addIntAttribute(ga::AttrOwner::PRIMITIVE, "vertexCount");
 }
 
 ga::AttributeHandle<int> geo::Geometry::addIntAttribute(ga::AttributeOwner owner, std::string name)