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+/** 
+ * @file llphysicsmotion.h
+ * @brief Implementation of LLPhysicsMotion class.
+ *
+ * $LicenseInfo:firstyear=2001&license=viewergpl$
+ * 
+ * Copyright (c) 2001-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLPHYSICSMOTIONCONTROLLER_H
+#define LL_LLPHYSICSMOTIONCONTROLLER_H
+
+//-----------------------------------------------------------------------------
+// Header files
+//-----------------------------------------------------------------------------
+#include "llmotion.h"
+#include "llframetimer.h"
+
+#define PHYSICS_MOTION_FADEIN_TIME 1.0f
+#define PHYSICS_MOTION_FADEOUT_TIME 1.0f
+
+class LLPhysicsMotion;
+
+//-----------------------------------------------------------------------------
+// class LLPhysicsMotion
+//-----------------------------------------------------------------------------
+class LLPhysicsMotionController :
+	public LLMotion
+{
+public:
+	// Constructor
+	LLPhysicsMotionController(const LLUUID &id);
+
+	// Destructor
+	virtual ~LLPhysicsMotionController();
+
+public:
+	//-------------------------------------------------------------------------
+	// functions to support MotionController and MotionRegistry
+	//-------------------------------------------------------------------------
+
+	// static constructor
+	// all subclasses must implement such a function and register it
+	static LLMotion *create(const LLUUID &id) { return new LLPhysicsMotionController(id); }
+
+public:
+	//-------------------------------------------------------------------------
+	// animation callbacks to be implemented by subclasses
+	//-------------------------------------------------------------------------
+
+	// motions must specify whether or not they loop
+	virtual BOOL getLoop() { return TRUE; }
+
+	// motions must report their total duration
+	virtual F32 getDuration() { return 0.0; }
+
+	// motions must report their "ease in" duration
+	virtual F32 getEaseInDuration() { return PHYSICS_MOTION_FADEIN_TIME; }
+
+	// motions must report their "ease out" duration.
+	virtual F32 getEaseOutDuration() { return PHYSICS_MOTION_FADEOUT_TIME; }
+
+	// called to determine when a motion should be activated/deactivated based on avatar pixel coverage
+	virtual F32 getMinPixelArea();
+
+	// motions must report their priority
+	virtual LLJoint::JointPriority getPriority() { return LLJoint::MEDIUM_PRIORITY; }
+
+	virtual LLMotionBlendType getBlendType() { return ADDITIVE_BLEND; }
+
+	// run-time (post constructor) initialization,
+	// called after parameters have been set
+	// must return true to indicate success and be available for activation
+	virtual LLMotionInitStatus onInitialize(LLCharacter *character);
+
+	// called when a motion is activated
+	// must return TRUE to indicate success, or else
+	// it will be deactivated
+	virtual BOOL onActivate();
+
+	// called per time step
+	// must return TRUE while it is active, and
+	// must return FALSE when the motion is completed.
+	virtual BOOL onUpdate(F32 time, U8* joint_mask);
+
+	// called when a motion is deactivated
+	virtual void onDeactivate();
+
+	LLCharacter* getCharacter() { return mCharacter; }
+
+protected:
+	void addMotion(LLPhysicsMotion *motion);
+private:
+	LLCharacter*		mCharacter;
+
+	typedef std::vector<LLPhysicsMotion *> motion_vec_t;
+	motion_vec_t mMotions;
+};
+
+#endif // LL_LLPHYSICSMOTION_H
+