Posted by dxli on Apr 30, 2014; 12:39am
URL: https://forum.librecad.org/LibreCAD-for-3D-design-problem-with-hatching-tp5709872p5709873.html

we know the current hatching algorithm is not robust, and we would like to create a robust and efficient hatching algorithm in Version 3 of LibreCAD, which is still in early stage of development leading by Ries.

In your case, you can repeat trimming to create a close contour. Please note that “trimming both" is a little buggy.