#define VEHICLE_SYNC_PACKET_ID 100

typedef unsigned char   uint8_t;
typedef unsigned short  uint16_t;
typedef unsigned long   uint32_t;

/*
    You need bitstream.cpp and .h
*/

// only work for SA-MP 0.3d R1 Windows server.

int ( __thiscall* CNetGame__SendPacketToPlayer )( uint32_t __NetGame, RakNet::BitStream* bStream, uint16_t playerid ) )0x483DD0; // init a pointer to the CNetGame::SendPacketToPlayer from SA-MP.


void SendInCarSync( uint16_t playerid )
{
    /*
        Just create your function to get vehicleid, position, keystate etc ...
    */

    uint16_t vehicleid = 0, leftRightKeys = 0, upDownKeys = 0, Keys = 0;
    float quartRotation[ 4 ] = { 0.0f, 0.0f, 0.0f, 0.0f };
    float position[ 3 ] = { 0.0f, 0.0f, 0.0f, 0.0f}, velocity[ 3 ] = { 0.0f, 0.0f, 0.0f, 0.0f};
    float vehicleHealth = 1000.0f;
    float playerHealth = 100.0f, playerArmor = 0.0f;
    uint8_t playerWeapon = 0;

    RakNet::BitStream bStream;

    bStream.Write( ( uint8_t ) VEHICLE_SYNC_PACKET_ID );
    bStream.Write( ( uint16_t ) playerid );

    bStream.Write( ( uint16_t ) vehicleid );

    bStream.Write( ( uint16_t ) leftRightKeys );
    bStream.Write( ( uint16_t ) upDownKeys );
    bStream.Write( ( uint16_t ) Keys );

    bStream.WriteNormQuat( quartRotation[0], quartRotation[1], quartRotation[2], quartRotation[3] );
    bStream.Write( ( char* )position, 3 * 4 );
    bStream.WriteVector( velocity[ 0 ], velocity[ 1 ], velocity[ 2 ] );
    bStream.Write( vehicleHealth );

    uint8_t compressedHealthArmour = 0x00;

    if( playerHealth > 0.0f && playerHealth  < 100.0f )
        compressedHealthArmour = ( uint8_t )( playerHealth / 7 ) << 4;
    else if( playerHealth  >= 100.0f )
        compressedHealthArmour = 0xF0;

    if( playerArmor > 0 && playerArmor < 100.0f )
        compressedHealthArmour |= ( uint8_t )( playerArmor / 7 );
    else if( playerArmor >= 100.0f )
        compressedHealthArmour |= 0x0F;

    bStream.Write( ( uint8_t ) compressedHealthArmour );
    bStream.Write( ( uint8_t ) playerWeapon );

    bStream.Write( false ); // need to sync sirentType ?
    bStream.Write( false ); // need to sync gearState ?
    bStream.Write( false ); // need to sync hydra reactor angle ?
    bStream.Write( false ); // need to sync trailer position ?


    // *( uint32_t* )( 0x4E6238 ) == __NetGame
    CNetGame__SendPacketToPlayer( *( uint32_t* )( 0x4E6238 ), &bStream, playerid );
}