[Joe Staff]

Something like this I guess

pawn Код:

#define TRAVEL_TYPES 2

#define TRAVEL_ONFOOT 0

#define TRAVEL_DRIVER 1

#define INVALID_POS -10000.00

forward UpdateTravel();

new Float:pTravelDist[MAX_PLAYERS][TRAVEL_TYPES];
new Float:pOldPos[MAX_PLAYERS][3];

stock PlayerDistanceToPoint(playerid,Float:x,Float:y,Float:z)
{
  new Float:px,Float:py,Float:pz;
  GetPlayerPos(playerid,py,px,pz);
  return floatsqroot( ( (x-px)*(x-px) ) + ( (y-py)*(y-py) ) + ( (z-pz)*(z-pz) ) );
}

public OnGameModeInit()
{
  SetTimer("UpdateTravel",1000,1);
  return 1;
}

public OnPlayerConnect(playerid)
{
  pOldPos[playerid]={INVALID_POS,...};
  return 1;
}

public OnPlayerSpawn(playerid)
{
  pOldPos[playerid]={INVALID_POS,...};
  return 1;
}

public UpdateTravel()
{
  new Float:x,Float:y,Float:z;
  for(new playerid;playerid<MAX_PLAYERS;playerid++) //Suggested to use foreach
  {
    if(!IsPlayerConnected(playerid))continue;
    GetPlayerPos(playerid,x,y,z);
    if(pOldDist[playerid][0]=INVALID_POS)
    {
      pOldDist[playerid][0]=x;
      pOldDist[playerid][1]=y;
      pOldDist[playerid][2]=z;
    }else{
      switch(GetPlayerState(playerid))
      {
        case PLAYER_STATE_ONFOOT: pTravelDist[playerid][TRAVEL_ONFOOT]+=PlayerDistanceToPoint(playerid,pOldDist[playerid][0],pOldDist[playerid][1],pOldDist[playerid][2]);
        case PLAYER_STATE_DRIVER: pTravelDist[playerid][TRAVEL_DRIVER]+=PlayerDistanceToPoint(playerid,pOldDist[playerid][0],pOldDist[playerid][1],pOldDist[playerid][2]);
      }
      pOldDist[playerid][0]=x;
      pOldDist[playerid][1]=y;
      pOldDist[playerid][2]=z;
    }
  }
}

With that script, the variables pTravelDist[playerid][TRAVEL_ONFOOT] and pTravelDist[playerid][TRAVEL_DRIVER] will keep tracking of your distance traveled on foot and whilst driver, respectively.

EDIT* Note that those values are in meters.