Finding objects in an arc/pie ?

Hello =)

Im having trouble with my combat system , I made one simple before where it just casted a raycast and it worked , But now i noticed it was kinda buggy , and you could even hit yourself sometimes . Well basicly I want to find all objects in an arc infront of me and send the damage input , yet i cant figure out how to do it :/ (Im a java script coder)

Thanks in advance , Utaelilya =)