[misco]

Finally the Velocity functions are here.

Код:

stock GetPlayerSpeed(playerid,bool:kmh) // by misco
{
  new Float:Vx,Float:Vy,Float:Vz,Float:rtn;
  if(IsPlayerInAnyVehicle(playerid)) GetVehicleVelocity(GetPlayerVehicleID(playerid),Vx,Vy,Vz); else GetPlayerVelocity(playerid,Vx,Vy,Vz);
  rtn = floatsqroot(floatabs(floatpower(Vx + Vy + Vz,2)));
  return kmh?floatround(rtn * 100 * 1.61):floatround(rtn * 100);
}

(edited)
Example usage:

Код:

if (!strcmp("/myspeed", cmdtext, true))
	{
		new str[128];
		format(str,128,"My speed is %d km/h and %d mph !",GetPlayerSpeed(playerid,true),GetPlayerSpeed(playerid,false));
		SendClientMessage(playerid,0xFFFFFFAA,str);
		return 1;
	}

Returned values seems real.