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diff --git a/engines/fullpipe/interaction.h b/engines/fullpipe/interaction.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef FULLPIPE_INTERACTION_H
+#define FULLPIPE_INTERACTION_H
+
+#include "fullpipe/utils.h"
+
+namespace Fullpipe {
+
+class GameObject;
+class MessageQueue;
+class StaticANIObject;
+
+int handleObjectInteraction(StaticANIObject *subject, GameObject *object, int invId);
+bool canInteractAny(GameObject *obj1, GameObject *obj2, int invId);
+
+
+class CInteraction : public CObject {
+ public:
+	int16 _objectId1;
+	int16 _objectId2;
+	int16 _objectId3;
+	int16 _staticsId1;
+	int16 _staticsId2;
+	int _objectState1;
+	int _objectState2;
+	int _xOffs;
+	int _yOffs;
+	MessageQueue *_messageQueue;
+	int _sceneId;
+	int _field_28;
+	int _flags;
+	char *_actionName;
+
+ public:
+	CInteraction();
+	virtual bool load(MfcArchive &file);
+	bool canInteract(GameObject *obj1, GameObject *obj2, int invId);
+	bool isOverlapping(StaticANIObject *subj, GameObject *obj);
+};
+
+class CInteractionController : public CObject {
+ public:
+	CObList _interactions;
+	int16 _field_20;
+	bool _flag24;
+
+ private:
+	static bool compareInteractions(const void *p1, const void *p2);
+
+ public:
+	CInteractionController() : _field_20(0), _flag24(true) {}
+
+	virtual bool load(MfcArchive &file);
+
+	void enableFlag24() { _flag24 = true; }
+	void disableFlag24() { _flag24 = false; }
+
+	void sortInteractions(int sceneId);
+
+	bool handleInteraction(StaticANIObject *subj, GameObject *obj, int invId);
+};
+
+struct EntranceInfo {
+	int32 _sceneId;
+	int32 _field_4;
+	int32 _messageQueueId;
+	byte _gap_C[292]; // FIXME
+	int32 _field_130;
+
+	bool load(MfcArchive &file);
+};
+
+} // End of namespace Fullpipe
+
+#endif /* FULLPIPE_INTERACTION_H */