MOHAWK: Riven: Implement transition offsets

The games tries to match objects between the old and new card by
offsetting the transition of the new card.

Fixes #9947.

1 files changed, 8 insertions, 1 deletions

diff --git a/engines/mohawk/riven_card.h b/engines/mohawk/riven_card.h
index 0d752ed5c0..24f2c137e7 100644
--- a/engines/mohawk/riven_card.h
+++ b/engines/mohawk/riven_card.h
@@ -244,6 +244,13 @@ public:
 	/** Get the hotspot's enable list id */
 	uint16 getBlstId() const;
 
+	/**
+	 * Get the offset used to control overlap during transitions
+	 *
+	 * -1 means no overlap.
+	 */
+	int16 getTransitionOffset() const;
+
 	/** Write all of the hotspot's data to standard output */
 	void dump() const;
 
@@ -263,7 +270,7 @@ private:
 	uint16 _u0;
 	uint16 _mouseCursor;
 	uint16 _index;
-	int16 _u1;
+	int16 _transitionOffset;
 	uint16 _flags;
 	RivenScriptList _scripts;
 };