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361 lines
10 KiB
C++
361 lines
10 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "std3d.h"
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#include "nel/misc/quat.h"
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#include "nel/misc/common.h"
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#include "nel/3d/track_sampled_quat.h"
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#include "nel/3d/track_sampled_quat_small_header.h"
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using namespace NLMISC;
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using namespace std;
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namespace NL3D
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{
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// ***************************************************************************
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// ***************************************************************************
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// Quaternion compression
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// ***************************************************************************
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// ***************************************************************************
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const double NL3D_OO32767= 1.0f/32767;
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const double NL3D_OO65535= 1.0f/65535;
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#ifdef NL3D_TSQ_ALLOW_QUAT_COMPRESS
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// ***************************************************************************
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void CQuatPack::pack(const CQuat &quat)
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{
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/*
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This is the most precise/faster compression we can have. Some other tries have been made.
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- deducing w from x,y,z is possible with w= 1-sqrt(x^2+y^2+z^2) (with tradeoff of the W sign)
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but very not precise.
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- Transform the quaternion to an AxisAngle is possible, but slower (some cos/sin or LUT).
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Axis is encoded with sint16, and angle is encoded with uint16.
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- The same than above, but encode the axis as X/Y only, and deduce Z from
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them, is possible but precision problems arise.
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You can see that the operation "deduce a 3/4 member from unit length rule" is definetly not precise.
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Hence this simpler but workable way.
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*/
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// normalize the quaterion.
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CQuatD nquat= quat;
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nquat.normalize();
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sint ax= (sint)floor(nquat.x * 32767 + 0.5);
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sint ay= (sint)floor(nquat.y * 32767 + 0.5);
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sint az= (sint)floor(nquat.z * 32767 + 0.5);
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sint aw= (sint)floor(nquat.w * 32767 + 0.5);
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clamp(ax, -32767, 32767);
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clamp(ay, -32767, 32767);
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clamp(az, -32767, 32767);
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clamp(aw, -32767, 32767);
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x= ax;
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y= ay;
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z= az;
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w= aw;
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}
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// ***************************************************************************
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void CQuatPack::unpack(CQuat &quat)
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{
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// unpack x/y/z.
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CQuatD quatD;
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quatD.x= x * NL3D_OO32767;
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quatD.y= y * NL3D_OO32767;
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quatD.z= z * NL3D_OO32767;
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quatD.w= w * NL3D_OO32767;
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quatD.normalize();
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quat= quatD;
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}
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#endif
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// ***************************************************************************
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// ***************************************************************************
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// CTrackSampledQuat
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// ***************************************************************************
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// ***************************************************************************
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// ***************************************************************************
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CTrackSampledQuat::CTrackSampledQuat()
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{
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}
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// ***************************************************************************
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CTrackSampledQuat::~CTrackSampledQuat()
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{
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}
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// ***************************************************************************
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void CTrackSampledQuat::serial(NLMISC::IStream &f)
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{
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/*
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Version 1:
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- split class with base CTrackSampledCommon (must add a version in it).
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Version 0:
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- base version.
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*/
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sint ver= f.serialVersion(1);
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if( ver<=0 )
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{
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// serial Time infos, directly in CTrackSampledCommon
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f.serial(_LoopMode);
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f.serial(_BeginTime);
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f.serial(_EndTime) ;
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f.serial(_TotalRange);
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f.serial(_OOTotalRange);
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f.serial(_DeltaTime);
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f.serial(_OODeltaTime);
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f.serial(_TimeBlocks);
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}
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else
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{
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// serial Time infos.
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CTrackSampledCommon::serialCommon(f);
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}
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// serial Keys.
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f.serial(_Keys);
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}
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// ***************************************************************************
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void CTrackSampledQuat::build(const std::vector<uint16> &timeList, const std::vector<CQuat> &keyList,
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float beginTime, float endTime)
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{
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nlassert( endTime>beginTime || (beginTime==endTime && keyList.size()<=1) );
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nlassert( keyList.size()==timeList.size() );
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uint i;
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// reset.
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uint numKeys= (uint)keyList.size();
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_Keys.clear();
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_TimeBlocks.clear();
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// Build Common time information
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CTrackSampledCommon::buildCommon(timeList, beginTime, endTime);
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// Compute All Key values.
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//===================
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_Keys.resize(numKeys);
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for(i=0; i<numKeys;i++)
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{
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_Keys[i].pack(keyList[i]);
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}
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}
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// ***************************************************************************
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const IAnimatedValue &CTrackSampledQuat::eval (const TAnimationTime& date, CAnimatedValueBlock &avBlock)
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{
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/* IF YOU CHANGE THIS CODE, CHANGE too CTrackSampledQuatSmallHeader
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*/
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// Eval time, and get key interpolation info
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uint keyId0;
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uint keyId1;
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float interpValue;
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TEvalType evalType= evalTime(date, _Keys.size(), keyId0, keyId1, interpValue);
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// Discard?
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if( evalType==EvalDiscard )
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return avBlock.ValQuat;
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// One Key? easy, and quit.
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else if( evalType==EvalKey0 )
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{
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_Keys[keyId0].unpack(avBlock.ValQuat.Value);
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}
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// interpolate
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else if( evalType==EvalInterpolate )
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{
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CQuatPack valueKey0= _Keys[keyId0];
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CQuatPack valueKey1= _Keys[keyId1];
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// If the 2 keys have same value, just unpack.
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if(valueKey0 == valueKey1)
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{
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valueKey0.unpack(avBlock.ValQuat.Value);
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}
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// else interpolate
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else
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{
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// unpack key value.
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CQuat quat0, quat1;
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valueKey0.unpack(quat0);
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valueKey1.unpack(quat1);
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// interpolate
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avBlock.ValQuat.Value= CQuat::slerp(quat0, quat1, interpValue);
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}
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}
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else
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{
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nlstop;
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}
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return avBlock.ValQuat;
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}
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// ***************************************************************************
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void CTrackSampledQuat::applySampleDivisor(uint sampleDivisor)
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{
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if(sampleDivisor<=1)
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return;
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// **** build the key indices to keep, and rebuild the timeBlocks
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static std::vector<uint32> keepKeys;
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applySampleDivisorCommon(sampleDivisor, keepKeys);
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// **** rebuild the keys
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NLMISC::CObjectVector<CQuatPack, false> newKeys;
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newKeys.resize((uint32)keepKeys.size());
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for(uint i=0;i<newKeys.size();i++)
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{
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newKeys[i]= _Keys[keepKeys[i]];
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}
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// copy
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_Keys= newKeys;
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// TestYoyo
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/*nlinfo("ANIMQUAT:\t%d\t%d\t%d\t%d", sizeof(*this), _TimeBlocks.size(),
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_TimeBlocks.size()?_TimeBlocks[0].Times.size():0,
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_Keys.size() * sizeof(CQuatPack));*/
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}
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// ***************************************************************************
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bool CTrackSampledQuat::applyTrackQuatHeaderCompressionPass0(class CTrackSampleCounter &quatCounter)
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{
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// if there is more than 1 timeBlock, fails
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if(_TimeBlocks.size()>1)
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return false;
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// Support only 255 keys and not 256!!! cause _NumKeys is encoded in 8 bits!
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if(_Keys.size()>=256)
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return false;
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// if the number of keys ovveride the uint16 limit, abort
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if(_Keys.size()+quatCounter.NumKeys > 65536)
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return false;
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// Search if the Track header is the same as one of the quatCounter.
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// NB: O(N*N) but quatCounter.TrackHeaders should be very small
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uint headerIndex;
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for(headerIndex=0;headerIndex<quatCounter.TrackHeaders.size();headerIndex++)
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{
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CTrackSampleHeader &tsh= quatCounter.TrackHeaders[headerIndex];
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if( tsh.LoopMode == _LoopMode &&
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tsh.BeginTime == _BeginTime &&
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tsh.EndTime == _EndTime &&
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tsh.TotalRange == _TotalRange &&
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tsh.OOTotalRange == _OOTotalRange &&
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tsh.DeltaTime == _DeltaTime &&
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tsh.OODeltaTime == _OODeltaTime )
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break;
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}
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if(headerIndex==quatCounter.TrackHeaders.size())
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{
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// then must increment the TrackHeaders. must not ovverride the uint8 limit
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if(quatCounter.TrackHeaders.size()==256)
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return false;
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else
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{
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nlassert(quatCounter.TrackHeaders.size()<256);
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CTrackSampleHeader tsh;
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tsh.LoopMode = _LoopMode;
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tsh.BeginTime = _BeginTime;
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tsh.EndTime = _EndTime;
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tsh.TotalRange = _TotalRange;
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tsh.OOTotalRange = _OOTotalRange;
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tsh.DeltaTime = _DeltaTime;
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tsh.OODeltaTime = _OODeltaTime;
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quatCounter.TrackHeaders.push_back(tsh);
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}
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}
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// else ok, one Header match
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// increment the number of keys in the packed data
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quatCounter.NumKeys+= _Keys.size();
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// at least this track can be compressed
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return true;
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}
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// ***************************************************************************
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ITrack *CTrackSampledQuat::applyTrackQuatHeaderCompressionPass1(uint &globalKeyOffset, class CTrackSamplePack &quatPacker)
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{
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// if there is more than 1 timeBlock, fails
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if(_TimeBlocks.size()>1)
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return NULL;
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// Support only 255 keys and not 256!!! cause _NumKeys is encoded in 8 bits!
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if(_Keys.size()>=256)
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return NULL;
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// if the number of keys ovveride the uint16 limit, abort
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if(_Keys.size()+globalKeyOffset > 65536)
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return NULL;
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// Search if the Track header is the same as one of the quatPacker.
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// NB: O(N*N) but quatPacker.TrackHeaders should be very small
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uint headerIndex;
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for(headerIndex=0;headerIndex<quatPacker.TrackHeaders.size();headerIndex++)
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{
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CTrackSampleHeader &tsh= quatPacker.TrackHeaders[headerIndex];
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if( tsh.LoopMode == _LoopMode &&
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tsh.BeginTime == _BeginTime &&
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tsh.EndTime == _EndTime &&
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tsh.TotalRange == _TotalRange &&
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tsh.OOTotalRange == _OOTotalRange &&
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tsh.DeltaTime == _DeltaTime &&
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tsh.OODeltaTime == _OODeltaTime )
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break;
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}
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if(headerIndex==quatPacker.TrackHeaders.size())
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{
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return NULL;
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}
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// OK! this track can be converted to a CTrackSampledQuatSmallHeader
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uint keyIndex= globalKeyOffset;
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// increment the number of keys in the packed data
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globalKeyOffset+= _Keys.size();
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// **** fill the packer struct
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uint i;
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for(i=0;i<_Keys.size();i++)
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{
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quatPacker.Times[keyIndex+i]= _TimeBlocks[0].Times[i];
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quatPacker.Keys[keyIndex+i]= _Keys[i];
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}
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// **** Build the compressed quat, and return it
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return new CTrackSampledQuatSmallHeader(&quatPacker, (uint8)headerIndex, (uint8)_Keys.size(), keyIndex);
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}
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} // NL3D
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