Can smb add reading feature ID also if trace was successful? I would like to implement destroying barricades on group way.

It's rts\ExternalAI\AICheats.cpp, int CAICheats::HandleCommand(int commandId, void *data). When calling helper->TraceRay() there are 7 arguments passed, and feature can be retrieved via 8th.

done, please test it with this build:
http://springrts.com/dl/buildbot/defaul ... -g1f664b6/

commit:
http://github.com/spring/spring/commit/ ... 5cd#L3R123

i will have to alter this.
the specs for the callback & commands, allows only one return value. so it will be split into two commands. in other words, do not use as it is yet, and wait for the change please.

Why do you need more than one return value?