400 lines
15 KiB
C++
400 lines
15 KiB
C++
/**
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* @file llkeyframewalkmotion.cpp
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* @brief Implementation of LLKeyframeWalkMotion class.
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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//-----------------------------------------------------------------------------
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// Header Files
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//-----------------------------------------------------------------------------
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#include "linden_common.h"
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#include "llkeyframewalkmotion.h"
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#include "llcharacter.h"
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#include "llmath.h"
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#include "m3math.h"
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#include "llcriticaldamp.h"
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//-----------------------------------------------------------------------------
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// Macros
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//-----------------------------------------------------------------------------
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const F32 MAX_WALK_PLAYBACK_SPEED = 8.f; // max m/s for which we adjust walk cycle speed
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const F32 MIN_WALK_SPEED = 0.1f; // minimum speed at which we use velocity for down foot detection
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const F32 TIME_EPSILON = 0.001f; // minumum frame time
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const F32 MAX_TIME_DELTA = 2.f; // max two seconds a frame for calculating interpolation
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F32 SPEED_ADJUST_MAX_SEC = 2.f; // maximum adjustment to walk animation playback speed for a second
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F32 ANIM_SPEED_MAX = 1.5f; // absolute upper limit on animation speed
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const F32 DRIFT_COMP_MAX_TOTAL = 0.1f; // maximum drift compensation overall, in any direction
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const F32 DRIFT_COMP_MAX_SPEED = 4.f; // speed at which drift compensation total maxes out
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const F32 MAX_ROLL = 0.6f;
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const F32 PELVIS_COMPENSATION_WIEGHT = 0.7f; // proportion of foot drift that is compensated by moving the avatar directly
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const F32 SPEED_ADJUST_TIME_CONSTANT = 0.1f; // time constant for speed adjustment interpolation
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//-----------------------------------------------------------------------------
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// LLKeyframeWalkMotion()
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// Class Constructor
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//-----------------------------------------------------------------------------
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LLKeyframeWalkMotion::LLKeyframeWalkMotion(const LLUUID &id)
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: LLKeyframeMotion(id),
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mCharacter(NULL),
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mCyclePhase(0.0f),
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mRealTimeLast(0.0f),
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mAdjTimeLast(0.0f),
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mDownFoot(0)
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{}
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//-----------------------------------------------------------------------------
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// ~LLKeyframeWalkMotion()
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// Class Destructor
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//-----------------------------------------------------------------------------
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LLKeyframeWalkMotion::~LLKeyframeWalkMotion()
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{}
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//-----------------------------------------------------------------------------
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// LLKeyframeWalkMotion::onInitialize()
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//-----------------------------------------------------------------------------
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LLMotion::LLMotionInitStatus LLKeyframeWalkMotion::onInitialize(LLCharacter *character)
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{
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mCharacter = character;
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return LLKeyframeMotion::onInitialize(character);
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}
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//-----------------------------------------------------------------------------
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// LLKeyframeWalkMotion::onActivate()
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//-----------------------------------------------------------------------------
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BOOL LLKeyframeWalkMotion::onActivate()
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{
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mRealTimeLast = 0.0f;
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mAdjTimeLast = 0.0f;
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return LLKeyframeMotion::onActivate();
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}
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//-----------------------------------------------------------------------------
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// LLKeyframeWalkMotion::onDeactivate()
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//-----------------------------------------------------------------------------
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void LLKeyframeWalkMotion::onDeactivate()
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{
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mCharacter->removeAnimationData("Down Foot");
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LLKeyframeMotion::onDeactivate();
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}
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//-----------------------------------------------------------------------------
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// LLKeyframeWalkMotion::onUpdate()
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//-----------------------------------------------------------------------------
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BOOL LLKeyframeWalkMotion::onUpdate(F32 time, U8* joint_mask)
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{
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// compute time since last update
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F32 deltaTime = time - mRealTimeLast;
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void* speed_ptr = mCharacter->getAnimationData("Walk Speed");
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F32 speed = (speed_ptr) ? *((F32 *)speed_ptr) : 1.f;
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// adjust the passage of time accordingly
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F32 adjusted_time = mAdjTimeLast + (deltaTime * speed);
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// save time for next update
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mRealTimeLast = time;
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mAdjTimeLast = adjusted_time;
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// handle wrap around
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if (adjusted_time < 0.0f)
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{
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adjusted_time = getDuration() + fmod(adjusted_time, getDuration());
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}
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// let the base class update the cycle
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return LLKeyframeMotion::onUpdate( adjusted_time, joint_mask );
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}
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// End
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//-----------------------------------------------------------------------------
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// LLWalkAdjustMotion()
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// Class Constructor
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//-----------------------------------------------------------------------------
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LLWalkAdjustMotion::LLWalkAdjustMotion(const LLUUID &id) :
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LLMotion(id),
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mLastTime(0.f),
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mAnimSpeed(0.f),
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mAdjustedSpeed(0.f),
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mRelativeDir(0.f),
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mAnkleOffset(0.f)
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{
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mName = "walk_adjust";
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mPelvisState = new LLJointState;
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}
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//-----------------------------------------------------------------------------
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// LLWalkAdjustMotion::onInitialize()
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//-----------------------------------------------------------------------------
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LLMotion::LLMotionInitStatus LLWalkAdjustMotion::onInitialize(LLCharacter *character)
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{
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mCharacter = character;
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mLeftAnkleJoint = mCharacter->getJoint("mAnkleLeft");
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mRightAnkleJoint = mCharacter->getJoint("mAnkleRight");
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mPelvisJoint = mCharacter->getJoint("mPelvis");
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mPelvisState->setJoint( mPelvisJoint );
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if ( !mPelvisJoint )
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{
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llwarns << getName() << ": Can't get pelvis joint." << llendl;
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return STATUS_FAILURE;
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}
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mPelvisState->setUsage(LLJointState::POS);
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addJointState( mPelvisState );
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return STATUS_SUCCESS;
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}
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//-----------------------------------------------------------------------------
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// LLWalkAdjustMotion::onActivate()
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//-----------------------------------------------------------------------------
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BOOL LLWalkAdjustMotion::onActivate()
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{
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mAnimSpeed = 0.f;
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mAdjustedSpeed = 0.f;
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mRelativeDir = 1.f;
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mPelvisState->setPosition(LLVector3::zero);
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// store ankle positions for next frame
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mLastLeftFootGlobalPos = mCharacter->getPosGlobalFromAgent(mLeftAnkleJoint->getWorldPosition());
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mLastLeftFootGlobalPos.mdV[VZ] = 0.0;
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mLastRightFootGlobalPos = mCharacter->getPosGlobalFromAgent(mRightAnkleJoint->getWorldPosition());
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mLastRightFootGlobalPos.mdV[VZ] = 0.0;
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F32 leftAnkleOffset = (mLeftAnkleJoint->getWorldPosition() - mCharacter->getCharacterPosition()).magVec();
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F32 rightAnkleOffset = (mRightAnkleJoint->getWorldPosition() - mCharacter->getCharacterPosition()).magVec();
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mAnkleOffset = llmax(leftAnkleOffset, rightAnkleOffset);
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return TRUE;
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}
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//-----------------------------------------------------------------------------
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// LLWalkAdjustMotion::onUpdate()
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//-----------------------------------------------------------------------------
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BOOL LLWalkAdjustMotion::onUpdate(F32 time, U8* joint_mask)
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{
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// delta_time is guaranteed to be non zero
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F32 delta_time = llclamp(time - mLastTime, TIME_EPSILON, MAX_TIME_DELTA);
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mLastTime = time;
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// find the avatar motion vector in the XY plane
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LLVector3 avatar_velocity = mCharacter->getCharacterVelocity() * mCharacter->getTimeDilation();
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avatar_velocity.mV[VZ] = 0.f;
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F32 speed = llclamp(avatar_velocity.magVec(), 0.f, MAX_WALK_PLAYBACK_SPEED);
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// grab avatar->world transforms
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LLQuaternion avatar_to_world_rot = mCharacter->getRootJoint()->getWorldRotation();
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LLQuaternion world_to_avatar_rot(avatar_to_world_rot);
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world_to_avatar_rot.conjugate();
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LLVector3 foot_slip_vector;
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// find foot drift along velocity vector
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if (speed > MIN_WALK_SPEED)
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{ // walking/running
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// calculate world-space foot drift
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// use global coordinates to seamlessly handle region crossings
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LLVector3d leftFootGlobalPosition = mCharacter->getPosGlobalFromAgent(mLeftAnkleJoint->getWorldPosition());
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leftFootGlobalPosition.mdV[VZ] = 0.0;
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LLVector3 leftFootDelta(leftFootGlobalPosition - mLastLeftFootGlobalPos);
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mLastLeftFootGlobalPos = leftFootGlobalPosition;
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LLVector3d rightFootGlobalPosition = mCharacter->getPosGlobalFromAgent(mRightAnkleJoint->getWorldPosition());
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rightFootGlobalPosition.mdV[VZ] = 0.0;
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LLVector3 rightFootDelta(rightFootGlobalPosition - mLastRightFootGlobalPos);
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mLastRightFootGlobalPos = rightFootGlobalPosition;
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// get foot drift along avatar direction of motion
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F32 left_foot_slip_amt = leftFootDelta * avatar_velocity;
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F32 right_foot_slip_amt = rightFootDelta * avatar_velocity;
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// if right foot is pushing back faster than left foot...
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if (right_foot_slip_amt < left_foot_slip_amt)
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{ //...use it to calculate optimal animation speed
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foot_slip_vector = rightFootDelta;
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}
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else
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{ // otherwise use the left foot
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foot_slip_vector = leftFootDelta;
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}
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// calculate ideal pelvis offset so that foot is glued to ground and damp towards it
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// this will soak up transient slippage
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//
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// FIXME: this interacts poorly with speed adjustment
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// mPelvisOffset compensates for foot drift by moving the avatar pelvis in the opposite
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// direction of the drift, up to a certain limited distance
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// but this will cause the animation playback rate calculation below to
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// kick in too slowly and sometimes start playing the animation in reverse.
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//mPelvisOffset -= PELVIS_COMPENSATION_WIEGHT * (foot_slip_vector * world_to_avatar_rot);//lerp(LLVector3::zero, -1.f * (foot_slip_vector * world_to_avatar_rot), LLCriticalDamp::getInterpolant(0.1f));
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////F32 drift_comp_max = DRIFT_COMP_MAX_TOTAL * (llclamp(speed, 0.f, DRIFT_COMP_MAX_SPEED) / DRIFT_COMP_MAX_SPEED);
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//F32 drift_comp_max = DRIFT_COMP_MAX_TOTAL;
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//// clamp pelvis offset to a 90 degree arc behind the nominal position
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//// NB: this is an ADDITIVE amount that is accumulated every frame, so clamping it alone won't do the trick
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//// must clamp with absolute position of pelvis in mind
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//LLVector3 currentPelvisPos = mPelvisState->getJoint()->getPosition();
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//mPelvisOffset.mV[VX] = llclamp( mPelvisOffset.mV[VX], -drift_comp_max, drift_comp_max );
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//mPelvisOffset.mV[VY] = llclamp( mPelvisOffset.mV[VY], -drift_comp_max, drift_comp_max );
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//mPelvisOffset.mV[VZ] = 0.f;
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//
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//mLastRightFootGlobalPos += LLVector3d(mPelvisOffset * avatar_to_world_rot);
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//mLastLeftFootGlobalPos += LLVector3d(mPelvisOffset * avatar_to_world_rot);
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//foot_slip_vector -= mPelvisOffset;
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LLVector3 avatar_movement_dir = avatar_velocity;
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avatar_movement_dir.normalize();
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// planted foot speed is avatar velocity - foot slip amount along avatar movement direction
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F32 foot_speed = speed - ((foot_slip_vector * avatar_movement_dir) / delta_time);
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// multiply animation playback rate so that foot speed matches avatar speed
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F32 min_speed_multiplier = clamp_rescale(speed, 0.f, 1.f, 0.f, 0.1f);
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F32 desired_speed_multiplier = llclamp(speed / foot_speed, min_speed_multiplier, ANIM_SPEED_MAX);
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// blend towards new speed adjustment value
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F32 new_speed_adjust = lerp(mAdjustedSpeed, desired_speed_multiplier, LLCriticalDamp::getInterpolant(SPEED_ADJUST_TIME_CONSTANT));
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// limit that rate at which the speed adjustment changes
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F32 speedDelta = llclamp(new_speed_adjust - mAdjustedSpeed, -SPEED_ADJUST_MAX_SEC * delta_time, SPEED_ADJUST_MAX_SEC * delta_time);
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mAdjustedSpeed += speedDelta;
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// modulate speed by dot products of facing and velocity
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// so that if we are moving sideways, we slow down the animation
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// and if we're moving backward, we walk backward
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// do this at the end to be more responsive to direction changes instead of in the above speed calculations
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F32 directional_factor = (avatar_movement_dir * world_to_avatar_rot).mV[VX];
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mAnimSpeed = mAdjustedSpeed * directional_factor;
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}
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else
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{ // standing/turning
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// damp out speed adjustment to 0
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mAnimSpeed = lerp(mAnimSpeed, 1.f, LLCriticalDamp::getInterpolant(0.2f));
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//mPelvisOffset = lerp(mPelvisOffset, LLVector3::zero, LLCriticalDamp::getInterpolant(0.2f));
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}
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// broadcast walk speed change
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mCharacter->setAnimationData("Walk Speed", &mAnimSpeed);
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// set position
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// need to update *some* joint to keep this animation active
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mPelvisState->setPosition(mPelvisOffset);
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return TRUE;
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}
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//-----------------------------------------------------------------------------
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// LLWalkAdjustMotion::onDeactivate()
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//-----------------------------------------------------------------------------
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void LLWalkAdjustMotion::onDeactivate()
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{
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mCharacter->removeAnimationData("Walk Speed");
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}
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//-----------------------------------------------------------------------------
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// LLFlyAdjustMotion::LLFlyAdjustMotion()
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//-----------------------------------------------------------------------------
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LLFlyAdjustMotion::LLFlyAdjustMotion(const LLUUID &id)
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: LLMotion(id),
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mRoll(0.f)
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{
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mName = "fly_adjust";
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mPelvisState = new LLJointState;
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}
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//-----------------------------------------------------------------------------
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// LLFlyAdjustMotion::onInitialize()
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//-----------------------------------------------------------------------------
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LLMotion::LLMotionInitStatus LLFlyAdjustMotion::onInitialize(LLCharacter *character)
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{
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mCharacter = character;
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LLJoint* pelvisJoint = mCharacter->getJoint("mPelvis");
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mPelvisState->setJoint( pelvisJoint );
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if ( !pelvisJoint )
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{
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llwarns << getName() << ": Can't get pelvis joint." << llendl;
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return STATUS_FAILURE;
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}
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mPelvisState->setUsage(LLJointState::POS | LLJointState::ROT);
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addJointState( mPelvisState );
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return STATUS_SUCCESS;
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}
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//-----------------------------------------------------------------------------
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// LLFlyAdjustMotion::onActivate()
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//-----------------------------------------------------------------------------
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BOOL LLFlyAdjustMotion::onActivate()
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{
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mPelvisState->setPosition(LLVector3::zero);
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mPelvisState->setRotation(LLQuaternion::DEFAULT);
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mRoll = 0.f;
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return TRUE;
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}
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//-----------------------------------------------------------------------------
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// LLFlyAdjustMotion::onUpdate()
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//-----------------------------------------------------------------------------
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BOOL LLFlyAdjustMotion::onUpdate(F32 time, U8* joint_mask)
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{
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LLVector3 ang_vel = mCharacter->getCharacterAngularVelocity() * mCharacter->getTimeDilation();
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F32 speed = mCharacter->getCharacterVelocity().magVec();
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F32 roll_factor = clamp_rescale(speed, 7.f, 15.f, 0.f, -MAX_ROLL);
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F32 target_roll = llclamp(ang_vel.mV[VZ], -4.f, 4.f) * roll_factor;
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// roll is critically damped interpolation between current roll and angular velocity-derived target roll
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mRoll = lerp(mRoll, target_roll, LLCriticalDamp::getInterpolant(0.1f));
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LLQuaternion roll(mRoll, LLVector3(0.f, 0.f, 1.f));
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mPelvisState->setRotation(roll);
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return TRUE;
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}
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