1 files changed, 22 insertions, 0 deletions
diff --git a/main.h b/main.h
index 4e48fc5..a31bc64 100644
--- a/main.h
+++ b/main.h
@@ -67,10 +67,31 @@ struct cached_bitmap {
     uint32 Frame;           // What frame it is.
 };
 
+// Some actions may require a higher-level function to undo to a satisfactory
+// standard, so actions are allowed to do more than just set/swap single values.
+enum action_entry_type {
+    action_entry_layerinit,
+    action_entry_default
+};
+
+struct action_entry {
+    char *Name;
+    action_entry_type Type;
+    void *ExtraPointer;
+    uint16 NumberOfActions;
+};
+
+struct action_entries {
+    action_entry Entry[1024];
+    uint16 Index;
+    uint16 NumberOfEntries;
+};
+
 struct memory {
     memory_table Slot[16];
     cached_bitmap Bitmap[4096];
     void *Scratch;                  // 64 MB of data
+    action_entries Action;
 };
 
 struct property_channel;
@@ -486,6 +507,7 @@ struct project_state
     selection_type RecentSelectionType = selection_none;
 
     bool32 IsInteracting;
+    real32 InteractCache[4];        // we need to store the initial position in order to record it in the undo tree
     transforms_hotkey_interact TransformsHotkeyInteract;
 
     int32 MsgTime; // currently in "frames"