diff -r e1ced2523cad -r b6cbba6e29a1 CMakeLists.txt
--- a/CMakeLists.txt	Tue Nov 02 15:43:57 2021 +0200
+++ b/CMakeLists.txt	Thu Mar 03 11:42:52 2022 +0200
@@ -25,7 +25,7 @@
 source_group("3.2 Widgets" REGULAR_EXPRESSION "src/(ui|widgets)/.+\\.(cpp|h|ui)")
 source_group("3.1 Settings editor" REGULAR_EXPRESSION "src/settingseditor/.+\\.(cpp|h|ui)")
 source_group("3 User interface" REGULAR_EXPRESSION "src/(mainwindow|document|documentmanager|uiutilities)\\.(cpp|h|ui)")
-source_group("2 Model handling" REGULAR_EXPRESSION "src/(model|modeleditcontext|libraries|colors|parser|vertexmap|edithistory)\\.(cpp|h|ui)")
+source_group("2 Model handling" REGULAR_EXPRESSION "src/(model|modeleditcontext|libraries|colors|parser|vertexmap|edithistory|polygoncache)\\.(cpp|h|ui)")
 source_group("6 Editing tools" REGULAR_EXPRESSION "src/tools/.+\\.(cpp|h|ui)")
 
 set (LDFORGE_SOURCES
@@ -42,6 +42,7 @@
 	src/model.cpp
 	src/modeleditcontext.cpp
 	src/parser.cpp
+	src/polygoncache.cpp
 	src/uiutilities.cpp
 	src/version.cpp
 	src/vertexmap.cpp
@@ -95,6 +96,7 @@
 	src/model.h
 	src/modeleditcontext.h
 	src/parser.h
+	src/polygoncache.h
 	src/ring.h
 	src/uiutilities.h
 	src/utility.h