Checkpoint and autosave system with trigger volumes

Pattern: BP_Checkpoint with BoxTrigger, variable CheckpointID(int). OnBeginOverlap(Player) → DoOnce → CreateSaveGameObject(MySaveGame) → SET PlayerLocation, Health, Inventory, CheckpointID → SaveGameToSlot('AutoSave', 0). On death/respawn: LoadGameFromSlot('AutoSave') → Cast → TeleportTo(SavedLocation) → restore Health etc. Show 'Checkpoint Reached' UI briefly.

DoesSaveGameExist — check if save slot exists

DoesSaveGameExist — check if a save slot exists on disk

SaveGameToSlot — save a SaveGame object to disk

SlotName is an arbitrary string key (e.g. 'SaveSlot1'). UserIndex 0 for single-player.

CreateSaveGameObject — create save game instance

UGameplayStatics::CreateSaveGameObject. Cast result to your SaveGame class.

CreateSaveGameObject — create a new SaveGame instance

Cast ReturnValue to your SaveGame subclass (e.g. UBP_SaveGame) to set variables on it.

SetLifeSpan — set actor lifetime before auto-destroy

0 = live forever.

SaveGameToSlot — save game data to named slot

Save and load game data with SaveGame class

Save: CreateSaveGameObject(MySaveGameClass) → Cast → SET variables → SaveGameToSlot(Object, SlotName, 0). Load: DoesSaveGameExist(SlotName, 0) → Branch → True: LoadGameFromSlot(SlotName, 0) → Cast to MySaveGame → GET variables. Put save/load logic in GameInstance for persistence across levels.

Create a Blueprint for a car turntable that auto-rotates and allows mouse drag to manually rotate the car