khanat-opennel-code/code/nel/src/3d/track_sampled_quat.cpp

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2010-05-06 00:08:41 +00:00
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "std3d.h"
#include "nel/misc/quat.h"
#include "nel/misc/common.h"
#include "nel/3d/track_sampled_quat.h"
#include "nel/3d/track_sampled_quat_small_header.h"
using namespace NLMISC;
using namespace std;
namespace NL3D
{
// ***************************************************************************
// ***************************************************************************
// Quaternion compression
// ***************************************************************************
// ***************************************************************************
const double NL3D_OO32767= 1.0f/32767;
const double NL3D_OO65535= 1.0f/65535;
#ifdef NL3D_TSQ_ALLOW_QUAT_COMPRESS
// ***************************************************************************
void CQuatPack::pack(const CQuat &quat)
{
/*
This is the most precise/faster compression we can have. Some other tries have been made.
- 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.
- Transform the quaternion to an AxisAngle is possible, but slower (some cos/sin or LUT).
Axis is encoded with sint16, and angle is encoded with uint16.
- The same than above, but encode the axis as X/Y only, and deduce Z from
them, is possible but precision problems arise.
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.
*/
// normalize the quaterion.
CQuatD nquat= quat;
nquat.normalize();
sint ax= (sint)floor(nquat.x * 32767 + 0.5);
sint ay= (sint)floor(nquat.y * 32767 + 0.5);
sint az= (sint)floor(nquat.z * 32767 + 0.5);
sint aw= (sint)floor(nquat.w * 32767 + 0.5);
clamp(ax, -32767, 32767);
clamp(ay, -32767, 32767);
clamp(az, -32767, 32767);
clamp(aw, -32767, 32767);
x= ax;
y= ay;
z= az;
w= aw;
}
// ***************************************************************************
void CQuatPack::unpack(CQuat &quat)
{
// unpack x/y/z.
CQuatD quatD;
quatD.x= x * NL3D_OO32767;
quatD.y= y * NL3D_OO32767;
quatD.z= z * NL3D_OO32767;
quatD.w= w * NL3D_OO32767;
quatD.normalize();
quat= quatD;
}
#endif
// ***************************************************************************
// ***************************************************************************
// CTrackSampledQuat
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
CTrackSampledQuat::CTrackSampledQuat()
{
}
// ***************************************************************************
CTrackSampledQuat::~CTrackSampledQuat()
{
}
// ***************************************************************************
void CTrackSampledQuat::serial(NLMISC::IStream &f)
{
/*
Version 1:
- split class with base CTrackSampledCommon (must add a version in it).
Version 0:
- base version.
*/
sint ver= f.serialVersion(1);
if( ver<=0 )
{
// serial Time infos, directly in CTrackSampledCommon
f.serial(_LoopMode);
f.serial(_BeginTime);
f.serial(_EndTime) ;
f.serial(_TotalRange);
f.serial(_OOTotalRange);
f.serial(_DeltaTime);
f.serial(_OODeltaTime);
f.serial(_TimeBlocks);
}
else
{
// serial Time infos.
CTrackSampledCommon::serialCommon(f);
}
// serial Keys.
f.serial(_Keys);
}
// ***************************************************************************
void CTrackSampledQuat::build(const std::vector<uint16> &timeList, const std::vector<CQuat> &keyList,
float beginTime, float endTime)
{
nlassert( endTime>beginTime || (beginTime==endTime && keyList.size()<=1) );
nlassert( keyList.size()==timeList.size() );
uint i;
// reset.
uint numKeys= (uint)keyList.size();
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_Keys.clear();
_TimeBlocks.clear();
// Build Common time information
CTrackSampledCommon::buildCommon(timeList, beginTime, endTime);
// Compute All Key values.
//===================
_Keys.resize(numKeys);
for(i=0; i<numKeys;i++)
{
_Keys[i].pack(keyList[i]);
}
}
// ***************************************************************************
const IAnimatedValue &CTrackSampledQuat::eval (const TAnimationTime& date, CAnimatedValueBlock &avBlock)
{
/* IF YOU CHANGE THIS CODE, CHANGE too CTrackSampledQuatSmallHeader
*/
// Eval time, and get key interpolation info
uint keyId0;
uint keyId1;
float interpValue;
TEvalType evalType= evalTime(date, _Keys.size(), keyId0, keyId1, interpValue);
// Discard?
if( evalType==EvalDiscard )
return avBlock.ValQuat;
// One Key? easy, and quit.
else if( evalType==EvalKey0 )
{
_Keys[keyId0].unpack(avBlock.ValQuat.Value);
}
// interpolate
else if( evalType==EvalInterpolate )
{
CQuatPack valueKey0= _Keys[keyId0];
CQuatPack valueKey1= _Keys[keyId1];
// If the 2 keys have same value, just unpack.
if(valueKey0 == valueKey1)
{
valueKey0.unpack(avBlock.ValQuat.Value);
}
// else interpolate
else
{
// unpack key value.
CQuat quat0, quat1;
valueKey0.unpack(quat0);
valueKey1.unpack(quat1);
// interpolate
avBlock.ValQuat.Value= CQuat::slerp(quat0, quat1, interpValue);
}
}
else
{
nlstop;
}
return avBlock.ValQuat;
}
// ***************************************************************************
void CTrackSampledQuat::applySampleDivisor(uint sampleDivisor)
{
if(sampleDivisor<=1)
return;
// **** build the key indices to keep, and rebuild the timeBlocks
static std::vector<uint32> keepKeys;
applySampleDivisorCommon(sampleDivisor, keepKeys);
// **** rebuild the keys
NLMISC::CObjectVector<CQuatPack, false> newKeys;
newKeys.resize((uint32)keepKeys.size());
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for(uint i=0;i<newKeys.size();i++)
{
newKeys[i]= _Keys[keepKeys[i]];
}
// copy
_Keys= newKeys;
// TestYoyo
/*nlinfo("ANIMQUAT:\t%d\t%d\t%d\t%d", sizeof(*this), _TimeBlocks.size(),
_TimeBlocks.size()?_TimeBlocks[0].Times.size():0,
_Keys.size() * sizeof(CQuatPack));*/
}
// ***************************************************************************
bool CTrackSampledQuat::applyTrackQuatHeaderCompressionPass0(class CTrackSampleCounter &quatCounter)
{
// if there is more than 1 timeBlock, fails
if(_TimeBlocks.size()>1)
return false;
// Support only 255 keys and not 256!!! cause _NumKeys is encoded in 8 bits!
if(_Keys.size()>=256)
return false;
// if the number of keys ovveride the uint16 limit, abort
if(_Keys.size()+quatCounter.NumKeys > 65536)
return false;
// Search if the Track header is the same as one of the quatCounter.
// NB: O(N*N) but quatCounter.TrackHeaders should be very small
uint headerIndex;
for(headerIndex=0;headerIndex<quatCounter.TrackHeaders.size();headerIndex++)
{
CTrackSampleHeader &tsh= quatCounter.TrackHeaders[headerIndex];
if( tsh.LoopMode == _LoopMode &&
tsh.BeginTime == _BeginTime &&
tsh.EndTime == _EndTime &&
tsh.TotalRange == _TotalRange &&
tsh.OOTotalRange == _OOTotalRange &&
tsh.DeltaTime == _DeltaTime &&
tsh.OODeltaTime == _OODeltaTime )
break;
}
if(headerIndex==quatCounter.TrackHeaders.size())
{
// then must increment the TrackHeaders. must not ovverride the uint8 limit
if(quatCounter.TrackHeaders.size()==256)
return false;
else
{
nlassert(quatCounter.TrackHeaders.size()<256);
CTrackSampleHeader tsh;
tsh.LoopMode = _LoopMode;
tsh.BeginTime = _BeginTime;
tsh.EndTime = _EndTime;
tsh.TotalRange = _TotalRange;
tsh.OOTotalRange = _OOTotalRange;
tsh.DeltaTime = _DeltaTime;
tsh.OODeltaTime = _OODeltaTime;
quatCounter.TrackHeaders.push_back(tsh);
}
}
// else ok, one Header match
// increment the number of keys in the packed data
quatCounter.NumKeys+= _Keys.size();
// at least this track can be compressed
return true;
}
// ***************************************************************************
ITrack *CTrackSampledQuat::applyTrackQuatHeaderCompressionPass1(uint &globalKeyOffset, class CTrackSamplePack &quatPacker)
{
// if there is more than 1 timeBlock, fails
if(_TimeBlocks.size()>1)
return NULL;
// Support only 255 keys and not 256!!! cause _NumKeys is encoded in 8 bits!
if(_Keys.size()>=256)
return NULL;
// if the number of keys ovveride the uint16 limit, abort
if(_Keys.size()+globalKeyOffset > 65536)
return NULL;
// Search if the Track header is the same as one of the quatPacker.
// NB: O(N*N) but quatPacker.TrackHeaders should be very small
uint headerIndex;
for(headerIndex=0;headerIndex<quatPacker.TrackHeaders.size();headerIndex++)
{
CTrackSampleHeader &tsh= quatPacker.TrackHeaders[headerIndex];
if( tsh.LoopMode == _LoopMode &&
tsh.BeginTime == _BeginTime &&
tsh.EndTime == _EndTime &&
tsh.TotalRange == _TotalRange &&
tsh.OOTotalRange == _OOTotalRange &&
tsh.DeltaTime == _DeltaTime &&
tsh.OODeltaTime == _OODeltaTime )
break;
}
if(headerIndex==quatPacker.TrackHeaders.size())
{
return NULL;
}
// OK! this track can be converted to a CTrackSampledQuatSmallHeader
uint keyIndex= globalKeyOffset;
// increment the number of keys in the packed data
globalKeyOffset+= _Keys.size();
// **** fill the packer struct
uint i;
for(i=0;i<_Keys.size();i++)
{
quatPacker.Times[keyIndex+i]= _TimeBlocks[0].Times[i];
quatPacker.Keys[keyIndex+i]= _Keys[i];
}
// **** Build the compressed quat, and return it
return new CTrackSampledQuatSmallHeader(&quatPacker, (uint8)headerIndex, (uint8)_Keys.size(), keyIndex);
}
} // NL3D