khanat-opennel-code/code/nel/src/3d/track_sampled_common.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/misc/algo.h"
#include "nel/3d/track_sampled_common.h"
#include "nel/misc/vectord.h"
using namespace NLMISC;
using namespace std;
namespace NL3D
{
// ***************************************************************************
// ***************************************************************************
// CTrackSampledCommon
// ***************************************************************************
// ***************************************************************************
// ***************************************************************************
CTrackSampledCommon::CTrackSampledCommon()
{
_LoopMode= true;
}
// ***************************************************************************
CTrackSampledCommon::~CTrackSampledCommon()
{
}
// ***************************************************************************
bool CTrackSampledCommon::getLoopMode() const
{
return _LoopMode;
}
// ***************************************************************************
TAnimationTime CTrackSampledCommon::getBeginTime () const
{
return _BeginTime;
}
// ***************************************************************************
TAnimationTime CTrackSampledCommon::getEndTime () const
{
return _EndTime;
}
// ***************************************************************************
void CTrackSampledCommon::CTimeBlock::serial(NLMISC::IStream &f)
{
(void)f.serialVersion(0);
f.serial(TimeOffset);
f.serial(KeyOffset);
f.serial(Times);
}
// ***************************************************************************
void CTrackSampledCommon::serialCommon(NLMISC::IStream &f)
{
(void)f.serialVersion(0);
f.serial(_LoopMode);
f.serial(_BeginTime);
f.serial(_EndTime) ;
f.serial(_TotalRange);
f.serial(_OOTotalRange);
f.serial(_DeltaTime);
f.serial(_OODeltaTime);
f.serial(_TimeBlocks);
}
// ***************************************************************************
void CTrackSampledCommon::buildCommon(const std::vector<uint16> &timeList, float beginTime, float endTime)
{
nlassert( endTime>beginTime || (beginTime==endTime && timeList.size()<=1) );
uint i;
// reset.
uint numKeys= timeList.size();
_TimeBlocks.clear();
// Special case of 0 or 1 key.
//===================
if(numKeys<=1)
{
_BeginTime= beginTime;
_EndTime= endTime;
_TotalRange= 0;
_OOTotalRange= 0;
_DeltaTime= 0;
_OODeltaTime= 0;
if(numKeys==1)
{
_TimeBlocks.resize(1);
_TimeBlocks[0].TimeOffset= 0;
_TimeBlocks[0].Times.resize(1);
_TimeBlocks[0].Times[0]= 0;
}
return;
}
// Compute All Time blocks.
//===================
sint32 lastBlockFrame= -1000000;
nlassert(timeList[0] == 0);
// Header info for creating timeBlocks
vector<uint> timeBlockKeyId;
vector<uint> timeBlockNumKeys;
// compute how many time block we need.
for(i=0; i<numKeys; i++)
{
// verify growing order, and time difference.
if(i>0)
{
nlassert(timeList[i]>timeList[i-1]);
nlassert(timeList[i]-timeList[i-1] <= 255 );
}
// If the current frame is to far from the last TimeBlock frame (or if 1st timeBlock), must create a new timeBlock
if(timeList[i]-lastBlockFrame>255)
{
// create a new timeblock
timeBlockKeyId.push_back(i);
// Add this key to this new time Block (numKey == 1).
timeBlockNumKeys.push_back(1);
lastBlockFrame= timeList[i];
}
else
{
// Add this key to the timeBlock.
timeBlockNumKeys[timeBlockNumKeys.size()-1]++;
}
}
// Build the timeBlocks.
_TimeBlocks.resize(timeBlockKeyId.size());
for(i=0; i<timeBlockKeyId.size(); i++)
{
CTimeBlock &timeBlock= _TimeBlocks[i];
uint firstKeyId= timeBlockKeyId[i];
uint numKeys= timeBlockNumKeys[i];
// compute the offset time and key
timeBlock.KeyOffset= firstKeyId;
timeBlock.TimeOffset= timeList[firstKeyId];
// create array of key
timeBlock.Times.resize(numKeys);
for(uint j=0;j<timeBlock.Times.size(); j++)
{
// get the key time and make it local to the timeBlock.
timeBlock.Times[j]= timeList[firstKeyId+j] - timeBlock.TimeOffset;
}
}
// Compute other params
//===================
_BeginTime= beginTime;
_EndTime= endTime;
// compute deltatime for a frame to an other
uint totalFrameCount= timeList[numKeys-1] - timeList[0];
nlassert(totalFrameCount>0);
_DeltaTime= (_EndTime-_BeginTime) / totalFrameCount;
_OODeltaTime= (float)(1.0 / _DeltaTime);
// Compute range of anim
_TotalRange= _EndTime-_BeginTime;
_OOTotalRange= float(1.0/_TotalRange);
}
// ***************************************************************************
void CTrackSampledCommon::setLoopMode(bool mode)
{
_LoopMode= mode;
}
// ***************************************************************************
CTrackSampledCommon::TEvalType CTrackSampledCommon::evalTime (const TAnimationTime& date, uint numKeys, uint &keyId0, uint &keyId1, float &interpValue)
{
/* IF YOU CHANGE THIS CODE, CHANGE too CTrackSampledQuatSmallHeader
*/
// Empty? quit
if(numKeys==0)
return EvalDiscard;
// One Key? easy, and quit.
if(numKeys==1)
{
keyId0= 0;
return EvalKey0;
}
// manage Loop
//=====================
float localTime;
if(_LoopMode)
{
nlassert(_TotalRange>0);
// get relative to BeginTime.
localTime= date-_BeginTime;
// force us to be in interval [0, _TotalRange[.
if( localTime<0 || localTime>=_TotalRange )
{
double d= localTime*_OOTotalRange;
// floor(d) is the truncated number of loops.
d= localTime- floor(d)*_TotalRange;
localTime= (float)d;
// For precision problems, ensure correct range.
if(localTime<0 || localTime >= _TotalRange)
localTime= 0;
}
}
else
{
// get relative to BeginTime.
localTime= date-_BeginTime;
}
// Find the first key before localTime
//=====================
// get the frame in the track.
sint frame= (sint)floor(localTime*_OODeltaTime);
// clamp to uint16
clamp(frame, 0, 65535);
// Search the TimeBlock.
CTimeBlock keyTB;
keyTB.TimeOffset= frame;
uint tbId;
tbId= searchLowerBound(_TimeBlocks.getPtr(), _TimeBlocks.size(), keyTB);
// get this timeBlock.
CTimeBlock &timeBlock= _TimeBlocks[tbId];
// get frame relative to this timeBlock.
sint frameRel= frame-timeBlock.TimeOffset;
// clamp to uint8
clamp(frameRel, 0, 255);
// get the key in this timeBlock.
uint keyIdRel;
keyIdRel= searchLowerBound(timeBlock.Times.getPtr(), timeBlock.Times.size(), (uint8)frameRel);
// Get the Frame and Value of Key0.
uint frameKey0= timeBlock.TimeOffset + timeBlock.Times[keyIdRel];
// this is the key to evaluate
keyId0= timeBlock.KeyOffset + keyIdRel;
// Interpolate with next key
//=====================
// If not the last Key
if(keyId0<numKeys-1)
{
// Get the next key.
keyId1= keyId0+1;
uint frameKey1;
// If last key of the timeBlock, get the first time of the next timeBlock.
if( keyIdRel+1 >= timeBlock.Times.size() )
{
nlassert(tbId+1<_TimeBlocks.size());
frameKey1= _TimeBlocks[tbId+1].TimeOffset;
}
else
{
frameKey1= timeBlock.TimeOffset + timeBlock.Times[keyIdRel+1];
}
// unpack time.
float time0= frameKey0*_DeltaTime;
float time1= frameKey1*_DeltaTime;
// interpolate.
float t= (localTime-time0);
// If difference is one frame, optimize.
if(frameKey1-frameKey0==1)
t*= _OODeltaTime;
else
t/= (time1-time0);
clamp(t, 0.f, 1.f);
// store this interp value.
interpValue= t;
return EvalInterpolate;
}
// else (last key of anim), just eval this key.
return EvalKey0;
}
// ***************************************************************************
void CTrackSampledCommon::applySampleDivisorCommon(uint sampleDivisor, std::vector<uint32> &keepKeys)
{
nlassert(sampleDivisor>=2);
uint i,j;
/*
NB: to be faster, if we have multiple timeblock (rare, cause implies the anim>8.5 sec), the
number of time block is kept after this process, either if it could be lowered.
NB: for same reason, the first and last key of each timeBlock is kept to be simpler, and to avoid bug
in searchLowerBound() (we must keep first key of each timeBlock)
*/
// clear
keepKeys.clear();
// **** build the key indices to keep
static std::vector<uint32> blockKeepStart;
static std::vector<uint32> blockKeepEnd;
blockKeepStart.resize(_TimeBlocks.size());
blockKeepEnd.resize(_TimeBlocks.size());
// must Keep the first and last key.
uint lastKeyTime= 0;
for(i=0;i<_TimeBlocks.size();i++)
{
CTimeBlock &timeBlock= _TimeBlocks[i];
// keep track of the start new key for this block
blockKeepStart[i]= keepKeys.size();
for(j=0;j<timeBlock.Times.size();j++)
{
// get the time of this key
uint keyTime= timeBlock.Times[j] + timeBlock.TimeOffset;
// if the diff time with last inserted key is >= than the sampleDivisor, add it!
if( (keyTime - lastKeyTime >= sampleDivisor) ||
// add it also if it is the first or last key of the block
(j==0 || j==timeBlock.Times.size()-1) )
{
lastKeyTime= keyTime;
keepKeys.push_back(j+timeBlock.KeyOffset);
}
}
// keep track of the end (not included) new key for this block
blockKeepEnd[i]= keepKeys.size();
}
// **** rebuild the TimeBlocks
for(i=0;i<_TimeBlocks.size();i++)
{
CTimeBlock &timeBlock= _TimeBlocks[i];
uint keepStart= blockKeepStart[i];
uint keepEnd= blockKeepEnd[i];
NLMISC::CObjectVector<uint8, false> newKeys;
newKeys.resize(keepEnd-keepStart);
for(uint j=0;j<newKeys.size();j++)
{
newKeys[j]= timeBlock.Times[keepKeys[keepStart+j]-timeBlock.KeyOffset];
}
// copy
timeBlock.Times= newKeys;
// change the key offset!
timeBlock.KeyOffset= keepStart;
}
}
} // NL3D