mirror of
https://github.com/id-Software/DOOM-3-BFG.git
synced 2024-11-22 04:12:09 +00:00
958 lines
25 KiB
C++
958 lines
25 KiB
C++
/*
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===========================================================================
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Doom 3 BFG Edition GPL Source Code
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Copyright (C) 1993-2012 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 BFG Edition GPL Source Code ("Doom 3 BFG Edition Source Code").
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Doom 3 BFG Edition Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 BFG Edition Source Code 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 BFG Edition Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 BFG Edition Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 BFG Edition Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#ifndef __BITMSG_H__
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#define __BITMSG_H__
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/*
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================================================
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idBitMsg operates on a sequence of individual bits. It handles byte ordering and
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avoids alignment errors. It allows concurrent writing and reading. The data set with Init
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is never free-d.
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================================================
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*/
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class idBitMsg {
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public:
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idBitMsg() { InitWrite( NULL, 0 ); }
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idBitMsg( byte * data, int length ) { InitWrite( data, length ); }
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idBitMsg( const byte * data, int length ) { InitRead( data, length ); }
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// both read & write
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void InitWrite( byte *data, int length );
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// read only
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void InitRead( const byte *data, int length );
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// get data for writing
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byte * GetWriteData();
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// get data for reading
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const byte * GetReadData() const;
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// get the maximum message size
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int GetMaxSize() const;
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// generate error if not set and message is overflowed
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void SetAllowOverflow( bool set );
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// returns true if the message was overflowed
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bool IsOverflowed() const;
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// size of the message in bytes
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int GetSize() const;
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// set the message size
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void SetSize( int size );
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// get current write bit
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int GetWriteBit() const;
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// set current write bit
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void SetWriteBit( int bit );
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// returns number of bits written
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int GetNumBitsWritten() const;
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// space left in bytes for writing
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int GetRemainingSpace() const;
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// space left in bits for writing
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int GetRemainingWriteBits() const;
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//------------------------
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// Write State
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//------------------------
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// save the write state
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void SaveWriteState( int &s, int &b, uint64 &t ) const;
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// restore the write state
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void RestoreWriteState( int s, int b, uint64 t );
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//------------------------
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// Reading
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//------------------------
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// bytes read so far
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int GetReadCount() const;
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// set the number of bytes and bits read
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void SetReadCount( int bytes );
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// get current read bit
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int GetReadBit() const;
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// set current read bit
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void SetReadBit( int bit );
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// returns number of bits read
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int GetNumBitsRead() const;
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// number of bytes left to read
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int GetRemainingData() const;
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// number of bits left to read
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int GetRemainingReadBits() const;
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// save the read state
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void SaveReadState( int &c, int &b ) const;
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// restore the read state
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void RestoreReadState( int c, int b );
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//------------------------
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// Writing
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//------------------------
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// begin writing
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void BeginWriting();
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// write up to the next byte boundary
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void WriteByteAlign();
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// write the specified number of bits
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void WriteBits( int value, int numBits );
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void WriteBool( bool c );
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void WriteChar( int8 c );
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void WriteByte( uint8 c );
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void WriteShort( int16 c );
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void WriteUShort( uint16 c );
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void WriteLong( int32 c );
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void WriteLongLong( int64 c );
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void WriteFloat( float f );
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void WriteFloat( float f, int exponentBits, int mantissaBits );
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void WriteAngle8( float f );
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void WriteAngle16( float f );
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void WriteDir( const idVec3 &dir, int numBits );
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void WriteString( const char *s, int maxLength = -1, bool make7Bit = true );
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void WriteData( const void *data, int length );
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void WriteNetadr( const netadr_t adr );
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void WriteUNorm8( float f ) { WriteByte( idMath::Ftob( f * 255.0f ) ); }
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void WriteUNorm16( float f ) { WriteUShort( idMath::Ftoi( f * 65535.0f ) ); }
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void WriteNorm16( float f ) { WriteShort( idMath::Ftoi( f * 32767.0f ) ); }
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void WriteDeltaChar( int8 oldValue, int8 newValue ) { WriteByte( newValue - oldValue ); }
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void WriteDeltaByte( uint8 oldValue, uint8 newValue ) { WriteByte( newValue - oldValue ); }
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void WriteDeltaShort( int16 oldValue, int16 newValue ) { WriteUShort( newValue - oldValue ); }
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void WriteDeltaUShort( uint16 oldValue, uint16 newValue ) { WriteUShort( newValue - oldValue ); }
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void WriteDeltaLong( int32 oldValue, int32 newValue ) { WriteLong( newValue - oldValue ); }
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void WriteDeltaFloat( float oldValue, float newValue ) { WriteFloat( newValue - oldValue ); }
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void WriteDeltaFloat( float oldValue, float newValue, int exponentBits, int mantissaBits ) { WriteFloat( newValue - oldValue, exponentBits, mantissaBits ); }
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bool WriteDeltaDict( const idDict &dict, const idDict *base );
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template< int _max_, int _numBits_ >
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void WriteQuantizedFloat( float value );
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template< int _max_, int _numBits_ >
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void WriteQuantizedUFloat( float value ); // Quantize a float to a variable number of bits (assumes unsigned, uses simple quantization)
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template< typename T >
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void WriteVectorFloat( const T & v ) { for ( int i = 0; i < v.GetDimension(); i++ ) { WriteFloat( v[i] ); } }
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template< typename T >
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void WriteVectorUNorm8( const T & v ) { for ( int i = 0; i < v.GetDimension(); i++ ) { WriteUNorm8( v[i] ); } }
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template< typename T >
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void WriteVectorUNorm16( const T & v ) { for ( int i = 0; i < v.GetDimension(); i++ ) { WriteUNorm16( v[i] ); } }
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template< typename T >
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void WriteVectorNorm16( const T & v ) { for ( int i = 0; i < v.GetDimension(); i++ ) { WriteNorm16( v[i] ); } }
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// Compress a vector to a variable number of bits (assumes signed, uses simple quantization)
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template< typename T, int _max_, int _numBits_ >
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void WriteQuantizedVector( const T & v ) { for ( int i = 0; i < v.GetDimension(); i++ ) { WriteQuantizedFloat< _max_, _numBits_ >( v[i] ); } }
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// begin reading.
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void BeginReading() const;
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// read up to the next byte boundary
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void ReadByteAlign() const;
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// read the specified number of bits
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int ReadBits( int numBits ) const;
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bool ReadBool() const;
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int ReadChar() const;
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int ReadByte() const;
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int ReadShort() const;
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int ReadUShort() const;
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int ReadLong() const;
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int64 ReadLongLong() const;
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float ReadFloat() const;
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float ReadFloat( int exponentBits, int mantissaBits ) const;
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float ReadAngle8() const;
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float ReadAngle16() const;
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idVec3 ReadDir( int numBits ) const;
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int ReadString( char *buffer, int bufferSize ) const;
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int ReadString( idStr & str ) const;
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int ReadData( void *data, int length ) const;
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void ReadNetadr( netadr_t *adr ) const;
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float ReadUNorm8() const { return ReadByte() / 255.0f; }
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float ReadUNorm16() const { return ReadUShort() / 65535.0f; }
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float ReadNorm16() const { return ReadShort() / 32767.0f; }
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int8 ReadDeltaChar( int8 oldValue ) const { return oldValue + ReadByte(); }
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uint8 ReadDeltaByte( uint8 oldValue ) const { return oldValue + ReadByte(); }
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int16 ReadDeltaShort( int16 oldValue ) const { return oldValue + ReadUShort(); }
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uint16 ReadDeltaUShort( uint16 oldValue ) const { return oldValue + ReadUShort(); }
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int32 ReadDeltaLong( int32 oldValue ) const { return oldValue + ReadLong(); }
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float ReadDeltaFloat( float oldValue ) const { return oldValue + ReadFloat(); }
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float ReadDeltaFloat( float oldValue, int exponentBits, int mantissaBits ) const { return oldValue + ReadFloat( exponentBits, mantissaBits ); }
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bool ReadDeltaDict( idDict &dict, const idDict *base ) const;
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template< int _max_, int _numBits_ >
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float ReadQuantizedFloat() const;
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template< int _max_, int _numBits_ >
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float ReadQuantizedUFloat() const;
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template< typename T >
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void ReadVectorFloat( T & v ) const { for ( int i = 0; i < v.GetDimension(); i++ ) { v[i] = ReadFloat(); } }
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template< typename T >
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void ReadVectorUNorm8( T & v ) const { for ( int i = 0; i < v.GetDimension(); i++ ) { v[i] = ReadUNorm8(); } }
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template< typename T >
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void ReadVectorUNorm16( T & v ) const { for ( int i = 0; i < v.GetDimension(); i++ ) { v[i] = ReadUNorm16(); } }
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template< typename T >
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void ReadVectorNorm16( T & v ) const { for ( int i = 0; i < v.GetDimension(); i++ ) { v[i] = ReadNorm16(); } }
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template< typename T, int _max_, int _numBits_ >
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void ReadQuantizedVector( T & v ) const { for ( int i = 0; i < v.GetDimension(); i++ ) { v[i] = ReadQuantizedFloat< _max_, _numBits_ >(); } }
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static int DirToBits( const idVec3 &dir, int numBits );
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static idVec3 BitsToDir( int bits, int numBits );
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void SetHasChanged( bool b ) { hasChanged = b; }
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bool HasChanged() const { return hasChanged; }
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private:
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byte * writeData; // pointer to data for writing
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const byte * readData; // pointer to data for reading
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int maxSize; // maximum size of message in bytes
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int curSize; // current size of message in bytes
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mutable int writeBit; // number of bits written to the last written byte
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mutable int readCount; // number of bytes read so far
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mutable int readBit; // number of bits read from the last read byte
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bool allowOverflow; // if false, generate error when the message is overflowed
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bool overflowed; // set true if buffer size failed (with allowOverflow set)
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bool hasChanged; // Hack
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mutable uint64 tempValue;
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private:
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bool CheckOverflow( int numBits );
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byte * GetByteSpace( int length );
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};
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/*
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========================
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idBitMsg::InitWrite
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========================
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*/
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ID_INLINE void idBitMsg::InitWrite( byte *data, int length ) {
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writeData = data;
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readData = data;
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maxSize = length;
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curSize = 0;
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writeBit = 0;
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readCount = 0;
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readBit = 0;
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allowOverflow = false;
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overflowed = false;
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tempValue = 0;
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}
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/*
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========================
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idBitMsg::InitRead
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========================
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*/
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ID_INLINE void idBitMsg::InitRead( const byte *data, int length ) {
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writeData = NULL;
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readData = data;
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maxSize = length;
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curSize = length;
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writeBit = 0;
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readCount = 0;
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readBit = 0;
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allowOverflow = false;
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overflowed = false;
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tempValue = 0;
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}
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/*
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========================
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idBitMsg::GetWriteData
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========================
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*/
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ID_INLINE byte *idBitMsg::GetWriteData() {
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return writeData;
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}
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/*
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========================
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idBitMsg::GetReadData
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========================
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*/
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ID_INLINE const byte *idBitMsg::GetReadData() const {
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return readData;
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}
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/*
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========================
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idBitMsg::GetMaxSize
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========================
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*/
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ID_INLINE int idBitMsg::GetMaxSize() const {
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return maxSize;
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}
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/*
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========================
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idBitMsg::SetAllowOverflow
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========================
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*/
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ID_INLINE void idBitMsg::SetAllowOverflow( bool set ) {
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allowOverflow = set;
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}
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/*
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========================
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idBitMsg::IsOverflowed
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========================
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*/
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ID_INLINE bool idBitMsg::IsOverflowed() const {
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return overflowed;
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}
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/*
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========================
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idBitMsg::GetSize
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========================
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*/
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ID_INLINE int idBitMsg::GetSize() const {
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return curSize + ( writeBit != 0 );
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}
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/*
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========================
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idBitMsg::SetSize
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========================
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*/
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ID_INLINE void idBitMsg::SetSize( int size ) {
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assert( writeBit == 0 );
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if ( size > maxSize ) {
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curSize = maxSize;
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} else {
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curSize = size;
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}
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}
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/*
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========================
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idBitMsg::GetWriteBit
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========================
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*/
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ID_INLINE int idBitMsg::GetWriteBit() const {
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return writeBit;
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}
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/*
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========================
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idBitMsg::SetWriteBit
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========================
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*/
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ID_INLINE void idBitMsg::SetWriteBit( int bit ) {
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// see idBitMsg::WriteByteAlign
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assert( false );
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writeBit = bit & 7;
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if ( writeBit ) {
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writeData[curSize - 1] &= ( 1 << writeBit ) - 1;
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}
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}
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/*
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========================
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idBitMsg::GetNumBitsWritten
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========================
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*/
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ID_INLINE int idBitMsg::GetNumBitsWritten() const {
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return ( curSize << 3 ) + writeBit;
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}
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/*
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========================
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idBitMsg::GetRemainingSpace
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========================
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*/
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ID_INLINE int idBitMsg::GetRemainingSpace() const {
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return maxSize - GetSize();
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}
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/*
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========================
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idBitMsg::GetRemainingWriteBits
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========================
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*/
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ID_INLINE int idBitMsg::GetRemainingWriteBits() const {
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return ( maxSize << 3 ) - GetNumBitsWritten();
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}
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/*
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========================
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idBitMsg::SaveWriteState
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========================
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*/
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ID_INLINE void idBitMsg::SaveWriteState( int &s, int &b, uint64 &t ) const {
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s = curSize;
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b = writeBit;
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t = tempValue;
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}
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/*
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========================
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idBitMsg::RestoreWriteState
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========================
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*/
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ID_INLINE void idBitMsg::RestoreWriteState( int s, int b, uint64 t ) {
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curSize = s;
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writeBit = b & 7;
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if ( writeBit ) {
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writeData[curSize] &= ( 1 << writeBit ) - 1;
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}
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tempValue = t;
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}
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/*
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========================
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idBitMsg::GetReadCount
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========================
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*/
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ID_INLINE int idBitMsg::GetReadCount() const {
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return readCount;
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}
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/*
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========================
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idBitMsg::SetReadCount
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========================
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*/
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ID_INLINE void idBitMsg::SetReadCount( int bytes ) {
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readCount = bytes;
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}
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/*
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========================
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idBitMsg::GetReadBit
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========================
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*/
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ID_INLINE int idBitMsg::GetReadBit() const {
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return readBit;
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}
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/*
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========================
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idBitMsg::SetReadBit
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========================
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*/
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ID_INLINE void idBitMsg::SetReadBit( int bit ) {
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readBit = bit & 7;
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}
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/*
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========================
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idBitMsg::GetNumBitsRead
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========================
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*/
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ID_INLINE int idBitMsg::GetNumBitsRead() const {
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return ( ( readCount << 3 ) - ( ( 8 - readBit ) & 7 ) );
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}
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/*
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========================
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idBitMsg::GetRemainingData
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========================
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*/
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ID_INLINE int idBitMsg::GetRemainingData() const {
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assert( writeBit == 0 );
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return curSize - readCount;
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}
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/*
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========================
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idBitMsg::GetRemainingReadBits
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========================
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*/
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ID_INLINE int idBitMsg::GetRemainingReadBits() const {
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assert( writeBit == 0 );
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return ( curSize << 3 ) - GetNumBitsRead();
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}
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/*
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========================
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idBitMsg::SaveReadState
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========================
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*/
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ID_INLINE void idBitMsg::SaveReadState( int &c, int &b ) const {
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assert( writeBit == 0 );
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c = readCount;
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b = readBit;
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}
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/*
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========================
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idBitMsg::RestoreReadState
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========================
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*/
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ID_INLINE void idBitMsg::RestoreReadState( int c, int b ) {
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assert( writeBit == 0 );
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readCount = c;
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readBit = b & 7;
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}
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/*
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========================
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idBitMsg::BeginWriting
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========================
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*/
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ID_INLINE void idBitMsg::BeginWriting() {
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curSize = 0;
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overflowed = false;
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writeBit = 0;
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tempValue = 0;
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}
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/*
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========================
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idBitMsg::WriteByteAlign
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========================
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*/
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ID_INLINE void idBitMsg::WriteByteAlign() {
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// it is important that no uninitialized data slips in the msg stream,
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|
// because we use memcmp to decide if entities have changed and wether we should transmit them
|
|
// this function has the potential to leave uninitialized bits into the stream,
|
|
// however idBitMsg::WriteBits is properly initializing the byte to 0 so hopefully we are still safe
|
|
// adding this extra check just in case
|
|
curSize += writeBit != 0;
|
|
assert( writeBit == 0 || ( ( writeData[curSize - 1] >> writeBit ) == 0 ) ); // had to early out writeBit == 0 because when writeBit == 0 writeData[curSize - 1] may be the previous byte written and trigger false positives
|
|
writeBit = 0;
|
|
tempValue = 0;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteBool
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteBool( bool c ) {
|
|
WriteBits( c, 1 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteChar
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteChar( int8 c ) {
|
|
WriteBits( c, -8 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteByte
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteByte( uint8 c ) {
|
|
WriteBits( c, 8 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteShort
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteShort( int16 c ) {
|
|
WriteBits( c, -16 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteUShort
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteUShort( uint16 c ) {
|
|
WriteBits( c, 16 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteLong
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteLong( int32 c ) {
|
|
WriteBits( c, 32 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteLongLong
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteLongLong( int64 c ) {
|
|
int a = c;
|
|
int b = c >> 32;
|
|
WriteBits( a, 32 );
|
|
WriteBits( b, 32 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteFloat
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteFloat( float f ) {
|
|
WriteBits( *reinterpret_cast<int *>(&f), 32 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteFloat
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteFloat( float f, int exponentBits, int mantissaBits ) {
|
|
int bits = idMath::FloatToBits( f, exponentBits, mantissaBits );
|
|
WriteBits( bits, 1 + exponentBits + mantissaBits );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteAngle8
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteAngle8( float f ) {
|
|
WriteByte( ANGLE2BYTE( f ) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteAngle16
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteAngle16( float f ) {
|
|
WriteShort( ANGLE2SHORT(f) );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteDir
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::WriteDir( const idVec3 &dir, int numBits ) {
|
|
WriteBits( DirToBits( dir, numBits ), numBits );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::BeginReading
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::BeginReading() const {
|
|
readCount = 0;
|
|
readBit = 0;
|
|
|
|
writeBit = 0;
|
|
tempValue = 0;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadByteAlign
|
|
========================
|
|
*/
|
|
ID_INLINE void idBitMsg::ReadByteAlign() const {
|
|
readBit = 0;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadBool
|
|
========================
|
|
*/
|
|
ID_INLINE bool idBitMsg::ReadBool() const {
|
|
return ( ReadBits( 1 ) == 1 ) ? true : false;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadChar
|
|
========================
|
|
*/
|
|
ID_INLINE int idBitMsg::ReadChar() const {
|
|
return (signed char)ReadBits( -8 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadByte
|
|
========================
|
|
*/
|
|
ID_INLINE int idBitMsg::ReadByte() const {
|
|
return (unsigned char)ReadBits( 8 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadShort
|
|
========================
|
|
*/
|
|
ID_INLINE int idBitMsg::ReadShort() const {
|
|
return (short)ReadBits( -16 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadUShort
|
|
========================
|
|
*/
|
|
ID_INLINE int idBitMsg::ReadUShort() const {
|
|
return (unsigned short)ReadBits( 16 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadLong
|
|
========================
|
|
*/
|
|
ID_INLINE int idBitMsg::ReadLong() const {
|
|
return ReadBits( 32 );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadLongLong
|
|
========================
|
|
*/
|
|
ID_INLINE int64 idBitMsg::ReadLongLong() const {
|
|
int64 a = ReadBits( 32 );
|
|
int64 b = ReadBits( 32 );
|
|
int64 c = ( 0x00000000ffffffff & a ) | ( b << 32 );
|
|
return c;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadFloat
|
|
========================
|
|
*/
|
|
ID_INLINE float idBitMsg::ReadFloat() const {
|
|
float value;
|
|
*reinterpret_cast<int *>(&value) = ReadBits( 32 );
|
|
return value;
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadFloat
|
|
========================
|
|
*/
|
|
ID_INLINE float idBitMsg::ReadFloat( int exponentBits, int mantissaBits ) const {
|
|
int bits = ReadBits( 1 + exponentBits + mantissaBits );
|
|
return idMath::BitsToFloat( bits, exponentBits, mantissaBits );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadAngle8
|
|
========================
|
|
*/
|
|
ID_INLINE float idBitMsg::ReadAngle8() const {
|
|
return BYTE2ANGLE( ReadByte() );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadAngle16
|
|
========================
|
|
*/
|
|
ID_INLINE float idBitMsg::ReadAngle16() const {
|
|
return SHORT2ANGLE( ReadShort() );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadDir
|
|
========================
|
|
*/
|
|
ID_INLINE idVec3 idBitMsg::ReadDir( int numBits ) const {
|
|
return BitsToDir( ReadBits( numBits ), numBits );
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteQuantizedFloat
|
|
========================
|
|
*/
|
|
template< int _max_, int _numBits_ >
|
|
ID_INLINE void idBitMsg::WriteQuantizedFloat( float value ) {
|
|
enum { storeMax = ( 1 << ( _numBits_ - 1 ) ) - 1 };
|
|
if ( _max_ > storeMax ) {
|
|
// Scaling down (scale should be < 1)
|
|
const float scale = (float)storeMax / (float)_max_;
|
|
WriteBits( idMath::ClampInt( -storeMax, storeMax, idMath::Ftoi( value * scale ) ), -_numBits_ );
|
|
} else {
|
|
// Scaling up (scale should be >= 1) (Preserve whole numbers when possible)
|
|
enum { scale = storeMax / _max_ };
|
|
WriteBits( idMath::ClampInt( -storeMax, storeMax, idMath::Ftoi( value * scale ) ), -_numBits_ );
|
|
}
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::WriteQuantizedUFloat
|
|
========================
|
|
*/
|
|
template< int _max_, int _numBits_ >
|
|
ID_INLINE void idBitMsg::WriteQuantizedUFloat( float value ) {
|
|
enum { storeMax = ( 1 << _numBits_ ) - 1 };
|
|
if ( _max_ > storeMax ) {
|
|
// Scaling down (scale should be < 1)
|
|
const float scale = (float)storeMax / (float)_max_;
|
|
WriteBits( idMath::ClampInt( 0, storeMax, idMath::Ftoi( value * scale ) ), _numBits_ );
|
|
} else {
|
|
// Scaling up (scale should be >= 1) (Preserve whole numbers when possible)
|
|
enum { scale = storeMax / _max_ };
|
|
WriteBits( idMath::ClampInt( 0, storeMax, idMath::Ftoi( value * scale ) ), _numBits_ );
|
|
}
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadQuantizedFloat
|
|
========================
|
|
*/
|
|
template< int _max_, int _numBits_ >
|
|
ID_INLINE float idBitMsg::ReadQuantizedFloat() const {
|
|
enum { storeMax = ( 1 << ( _numBits_ - 1 ) ) - 1 };
|
|
if ( _max_ > storeMax ) {
|
|
// Scaling down (scale should be < 1)
|
|
const float invScale = (float)_max_ / (float)storeMax;
|
|
return (float)ReadBits( -_numBits_ ) * invScale;
|
|
} else {
|
|
// Scaling up (scale should be >= 1) (Preserve whole numbers when possible)
|
|
// Scale will be a whole number.
|
|
// We use a float to get rid of (potential divide by zero) which is handled above, but the compiler is dumb
|
|
const float scale = storeMax / _max_;
|
|
const float invScale = 1.0f / scale;
|
|
return (float)ReadBits( -_numBits_ ) * invScale;
|
|
}
|
|
}
|
|
|
|
/*
|
|
========================
|
|
idBitMsg::ReadQuantizedUFloat
|
|
========================
|
|
*/
|
|
template< int _max_, int _numBits_ >
|
|
float idBitMsg::ReadQuantizedUFloat() const {
|
|
enum { storeMax = ( 1 << _numBits_ ) - 1 };
|
|
if ( _max_ > storeMax ) {
|
|
// Scaling down (scale should be < 1)
|
|
const float invScale = (float)_max_ / (float)storeMax;
|
|
return (float)ReadBits( _numBits_ ) * invScale;
|
|
} else {
|
|
// Scaling up (scale should be >= 1) (Preserve whole numbers when possible)
|
|
// Scale will be a whole number.
|
|
// We use a float to get rid of (potential divide by zero) which is handled above, but the compiler is dumb
|
|
const float scale = storeMax / _max_;
|
|
const float invScale = 1.0f / scale;
|
|
return (float)ReadBits( _numBits_ ) * invScale;
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
WriteFloatArray
|
|
Writes all the values from the array to the bit message.
|
|
================
|
|
*/
|
|
template< class _arrayType_ >
|
|
void WriteFloatArray( idBitMsg & message, const _arrayType_ & sourceArray ) {
|
|
for( int i = 0; i < idTupleSize< _arrayType_ >::value; ++i ) {
|
|
message.WriteFloat( sourceArray[i] );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
WriteFloatArrayDelta
|
|
Writes _num_ values from the array to the bit message.
|
|
================
|
|
*/
|
|
template< class _arrayType_ >
|
|
void WriteDeltaFloatArray( idBitMsg & message, const _arrayType_ & oldArray, const _arrayType_ & newArray ) {
|
|
for( int i = 0; i < idTupleSize< _arrayType_ >::value; ++i ) {
|
|
message.WriteDeltaFloat( oldArray[i], newArray[i] );
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
ReadFloatArray
|
|
Reads _num_ values from the array to the bit message.
|
|
================
|
|
*/
|
|
template< class _arrayType_ >
|
|
_arrayType_ ReadFloatArray( const idBitMsg & message ) {
|
|
_arrayType_ result;
|
|
|
|
for( int i = 0; i < idTupleSize< _arrayType_ >::value; ++i ) {
|
|
result[i] = message.ReadFloat();
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
================
|
|
ReadDeltaFloatArray
|
|
Reads _num_ values from the array to the bit message.
|
|
================
|
|
*/
|
|
template< class _arrayType_ >
|
|
_arrayType_ ReadDeltaFloatArray( const idBitMsg & message, const _arrayType_ & oldArray ) {
|
|
_arrayType_ result;
|
|
|
|
for( int i = 0; i < idTupleSize< _arrayType_ >::value; ++i ) {
|
|
result[i] = message.ReadDeltaFloat( oldArray[i] );
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
#endif /* !__BITMSG_H__ */
|