This is a sample code that launches the player up into the air towards North (with an azimuth of 45 degrees) and rotates him:
player allowDamage false;
onEachFrame {
if (isGamePaused) exitWith {};
if (isTouchingGround player) exitWith {player setVelocity [0,100,100]};
player setVectorDir ([vectorDirVisual player, 1] call BIS_fnc_rotateVector2D);
hintSilent str ([0,0,0] getDir velocity player)
}
setDir works correctly:
player allowDamage false;
onEachFrame {
if (isGamePaused) exitWith {};
if (isTouchingGround player) exitWith {player setVelocity [0,100,100]};
player setDir (getDirVisual player - 1);
hintSilent str ([0,0,0] getDir velocity player)
}