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engine: restore delta float decode/encode from 2007 branch

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nillerusr 2022-07-31 20:11:48 +03:00
parent ba8fd2952f
commit 000b2db0b7
1 changed files with 133 additions and 87 deletions
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220
engine/dt_encode.cpp
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@ -19,101 +19,140 @@ extern bool ShouldWatchThisProp( const SendTable *pTable, int objectID, const ch
// The engine implements this.
extern const char* GetObjectClassName( int objectID );
void EncodeFloat( const SendProp *pProp, float fVal, bf_write *pOut, int objectID )
// Check for special flags like SPROP_COORD, SPROP_NOSCALE, and SPROP_NORMAL.
// Returns true if it encoded the float.
static inline bool EncodeSpecialFloat( const SendProp *pProp, float fVal, bf_write *pOut )
{
// Check for special flags like SPROP_COORD, SPROP_NOSCALE, and SPROP_NORMAL.
int flags = pProp->GetFlags();
if ( flags & SPROP_COORD )
{
pOut->WriteBitCoord( fVal );
return true;
}
else if ( flags & ( SPROP_COORD_MP | SPROP_COORD_MP_LOWPRECISION | SPROP_COORD_MP_INTEGRAL ) )
else if ( flags & SPROP_COORD_MP )
{
COMPILE_TIME_ASSERT( SPROP_COORD_MP_INTEGRAL == (1<<15) );
COMPILE_TIME_ASSERT( SPROP_COORD_MP_LOWPRECISION == (1<<14) );
pOut->WriteBitCoordMP( fVal, ((flags >> 15) & 1), ((flags >> 14) & 1) );
pOut->WriteBitCoordMP( fVal, false, false );
return true;
}
else if ( flags & SPROP_COORD_MP_LOWPRECISION )
{
pOut->WriteBitCoordMP( fVal, false, true );
return true;
}
else if ( flags & SPROP_COORD_MP_INTEGRAL )
{
pOut->WriteBitCoordMP( fVal, true, false );
return true;
}
else if ( flags & SPROP_NOSCALE )
{
pOut->WriteBitFloat( fVal );
return true;
}
else if ( flags & SPROP_NORMAL )
{
pOut->WriteBitNormal( fVal );
return true;
}
else // standard clamped-range float
return false;
}
static inline void EncodeFloat( const SendProp *pProp, float fVal, bf_write *pOut, int objectID )
{
// Check for special flags like SPROP_COORD, SPROP_NOSCALE, and SPROP_NORMAL.
if( EncodeSpecialFloat( pProp, fVal, pOut ) )
{
unsigned int ulVal;
int nBits = pProp->m_nBits;
if ( flags & SPROP_NOSCALE )
{
union { float f; uint32 u; } convert = { fVal };
ulVal = convert.u;
nBits = 32;
}
else if( fVal < pProp->m_fLowValue )
{
// clamp < 0
ulVal = 0;
if(!(flags & SPROP_ROUNDUP))
{
DataTable_Warning("(class %s): Out-of-range value (%f / %f) in SendPropFloat '%s', clamping.\n",
GetObjectClassName( objectID ), fVal, pProp->m_fLowValue, pProp->m_pVarName );
}
}
else if( fVal > pProp->m_fHighValue )
{
// clamp > 1
ulVal = ((1 << pProp->m_nBits) - 1);
if(!(flags & SPROP_ROUNDDOWN))
{
DataTable_Warning("%s: Out-of-range value (%f/%f) in SendPropFloat '%s', clamping.\n",
GetObjectClassName( objectID ), fVal, pProp->m_fHighValue, pProp->m_pVarName );
}
}
else
{
float fRangeVal = (fVal - pProp->m_fLowValue) * pProp->m_fHighLowMul;
if ( pProp->m_nBits <= 22 )
{
// this is the case we always expect to hit
ulVal = FastFloatToSmallInt( fRangeVal );
}
else
{
// retain old logic just in case anyone relies on its behavior
ulVal = RoundFloatToUnsignedLong( fRangeVal );
}
}
pOut->WriteUBitLong(ulVal, nBits);
return;
}
uint32 ulVal;
if( fVal < pProp->m_fLowValue )
{
// clamp < 0
ulVal = 0;
if(!(pProp->GetFlags() & SPROP_ROUNDUP))
{
DataTable_Warning("(class %s): Out-of-range value (%f) in SendPropFloat '%s', clamping.\n", GetObjectClassName( objectID ), fVal, pProp->m_pVarName );
}
}
else if( fVal > pProp->m_fHighValue )
{
// clamp > 1
ulVal = ((1 << pProp->m_nBits) - 1);
if(!(pProp->GetFlags() & SPROP_ROUNDDOWN))
{
DataTable_Warning("%s: Out-of-range value (%f) in SendPropFloat '%s', clamping.\n", GetObjectClassName( objectID ), fVal, pProp->m_pVarName );
}
}
else
{
float fRangeVal = (fVal - pProp->m_fLowValue) * pProp->m_fHighLowMul;
ulVal = RoundFloatToUnsignedLong( fRangeVal );
}
pOut->WriteUBitLong(ulVal, pProp->m_nBits);
}
// Look for special flags like SPROP_COORD, SPROP_NOSCALE, and SPROP_NORMAL and
// decode if they're there. Fills in fVal and returns true if it decodes anything.
static inline bool DecodeSpecialFloat( SendProp const *pProp, bf_read *pIn, float &fVal )
{
int flags = pProp->GetFlags();
if ( flags & SPROP_COORD )
{
fVal = pIn->ReadBitCoord();
return true;
}
else if ( flags & SPROP_COORD_MP )
{
fVal = pIn->ReadBitCoordMP( false, false );
return true;
}
else if ( flags & SPROP_COORD_MP_LOWPRECISION )
{
fVal = pIn->ReadBitCoordMP( false, true );
return true;
}
else if ( flags & SPROP_COORD_MP_INTEGRAL )
{
fVal = pIn->ReadBitCoordMP( true, false );
return true;
}
else if ( flags & SPROP_NOSCALE )
{
fVal = pIn->ReadBitFloat();
return true;
}
else if ( flags & SPROP_NORMAL )
{
fVal = pIn->ReadBitNormal();
return true;
}
return false;
}
static float DecodeFloat(SendProp const *pProp, bf_read *pIn)
{
int flags = pProp->GetFlags();
if ( flags & SPROP_COORD )
float fVal;
uint32 dwInterp;
// Check for special flags..
if( DecodeSpecialFloat( pProp, pIn, fVal ) )
{
return pIn->ReadBitCoord();
}
else if ( flags & ( SPROP_COORD_MP | SPROP_COORD_MP_LOWPRECISION | SPROP_COORD_MP_INTEGRAL ) )
{
return pIn->ReadBitCoordMP( (flags >> 15) & 1, (flags >> 14) & 1 );
}
else if ( flags & SPROP_NOSCALE )
{
return pIn->ReadBitFloat();
}
else if ( flags & SPROP_NORMAL )
{
return pIn->ReadBitNormal();
}
else // standard clamped-range float
{
unsigned int dwInterp = pIn->ReadUBitLong(pProp->m_nBits);
float fVal = (float)dwInterp / ((1 << pProp->m_nBits) - 1);
fVal = pProp->m_fLowValue + (pProp->m_fHighValue - pProp->m_fLowValue) * fVal;
return fVal;
}
dwInterp = pIn->ReadUBitLong(pProp->m_nBits);
fVal = (float)dwInterp / ((1 << pProp->m_nBits) - 1);
fVal = pProp->m_fLowValue + (pProp->m_fHighValue - pProp->m_fLowValue) * fVal;
return fVal;
}
static inline void DecodeVector(SendProp const *pProp, bf_read *pIn, float *v)
@ -400,26 +439,33 @@ void Float_Decode( DecodeInfo *pInfo )
int Float_CompareDeltas( const SendProp *pProp, bf_read *p1, bf_read *p2 )
{
int flags = pProp->GetFlags();
if ( flags & SPROP_COORD )
if ( pProp->GetFlags() & SPROP_COORD )
{
return p1->ReadBitCoordBits() != p2->ReadBitCoordBits();
return p1->ReadBitCoord() != p2->ReadBitCoord();
}
else if ( flags & ( SPROP_COORD_MP | SPROP_COORD_MP_LOWPRECISION | SPROP_COORD_MP_INTEGRAL ) )
else if ( pProp->GetFlags() & SPROP_COORD_MP )
{
return p1->ReadBitCoordMPBits( (flags >> 15) & 1, (flags >> 14) & 1 )
!= p2->ReadBitCoordMPBits( (flags >> 15) & 1, (flags >> 14) & 1 );
return p1->ReadBitCoordMP( false, false ) != p2->ReadBitCoordMP( false, false );
}
else if ( pProp->GetFlags() & SPROP_COORD_MP_LOWPRECISION )
{
return p1->ReadBitCoordMP( false, true ) != p2->ReadBitCoordMP( false, true );
}
else if ( pProp->GetFlags() & SPROP_COORD_MP_INTEGRAL )
{
return p1->ReadBitCoordMP( true, false ) != p2->ReadBitCoordMP( true, false );
}
else if ( pProp->GetFlags() & SPROP_NOSCALE )
{
return p1->ReadUBitLong( 32 ) != p2->ReadUBitLong( 32 );
}
else if ( pProp->GetFlags() & SPROP_NORMAL )
{
return p1->ReadUBitLong( NORMAL_FRACTIONAL_BITS+1 ) != p2->ReadUBitLong( NORMAL_FRACTIONAL_BITS+1 );
}
else
{
int bits;
if ( flags & SPROP_NOSCALE )
bits = 32;
else if ( flags & SPROP_NORMAL )
bits = NORMAL_FRACTIONAL_BITS+1;
else
bits = pProp->m_nBits;
return p1->ReadUBitLong( bits ) != p2->ReadUBitLong( bits );
return p1->ReadUBitLong( pProp->m_nBits ) != p2->ReadUBitLong( pProp->m_nBits );
}
}