/**
 * @file llkeyframefallmotion.h
 * @brief Implementation of LLKeframeWalkMotion 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
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 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 *
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 * 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
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 */

#ifndef LL_LLKeyframeFallMotion_H
#define LL_LLKeyframeFallMotion_H

#include "llcharacter.h"
#include "llkeyframemotion.h"
#include "llpreprocessor.h"

class LLKeyframeFallMotion final : public LLKeyframeMotion
{
protected:
	LOG_CLASS(LLKeyframeFallMotion);

public:
	LLKeyframeFallMotion(const LLUUID& id);

	LL_INLINE static LLMotion* create(const LLUUID& id)
	{
		return new LLKeyframeFallMotion(id);
	}

	LLMotionInitStatus onInitialize(LLCharacter* character) override;
	bool onActivate() override;

	LL_INLINE F32 getEaseInDuration() override
	{
		if (mVelocityZ == 0.f)
		{
			// We have already hit the ground
			return 0.4f;
		}
		return mCharacter->getPreferredPelvisHeight() / mVelocityZ;
	}

	bool onUpdate(F32 activeTime, U8* joint_mask) override;

protected:
	LLQuaternion			mRotationToGroundNormal;
	LLPointer<LLJointState>	mPelvisState;
	LLCharacter*			mCharacter;
	F32						mVelocityZ;
};

#endif // LL_LLKeyframeFallMotion_H