[Babul]

agreed. if you check for positive velocity, then only when driving north or east will trigger that axis. simply dont check for any speed, try:

Code:

new Float:X, Float:Y, Float:Z;
GetVehicleVelocity(GetPlayerVehicleID(playerid),X,Y,Z);
X=-X;
Y=-Y;
Z=-Z;
SetVehicleVelocity(GetPlayerVehicleID(playerid),X,Y,Z);