Reply To: How to create 2D triangle ？

The next release is planned for sometime in the first half of 2022 (we realize that it already has been quite a while since the last release, however the next release will be worth the wait in more than one aspect… :-))

Your indicator class looks ok at first glance but I am afraid that we can not provide general C++ programming support here. Did you check it in a minimal example (i.e. without XML, as simple as you can make it). If you satisfy the basic indicator interface operator()(bool output[], const S input[]) then everything downstream should work.