Added regular polygon shape.
Added regular polygon shape.

yglukhov/nimx,bogdan-voevoda/nimx,rrenderr/nimx,rrenderr/nimx,bogdan-voevoda/nimx,qqquinta/nimx,qqquinta/nimx,qqquinta/nimx,yglukhov/nimx,bogdan-voevoda/nimx,rrenderr/nimx,yglukhov/nimx