[BUG] in circular section, rotation angle set to 0 becomes 15°

[johnnyontheweb]

Describe the bug Unexpected behaviour of IOM in Circle cross section definition: an angle of 15° is added!

To Reproduce In IOM model, define a circle section with: CrossSectionFactory.FillCircle(css3, 0.01) an you'll get:

      <CrossSectionRotation>0</CrossSectionRotation>
      <CrossSectionType>O</CrossSectionType>

Unexpectedly, in IDEA Connection the section has 15° as angle of rotation.

Expected behavior I expect rotation to be zero. This can create confusion on results processing (principal vs. local axes).

Desktop (please complete the following information):

• OS: Windows 10 - latest
• IOM Version 21.0.14.0 and all previous
• IdeaStatiCa Version 20.1

[vojtech-chalupa]

Hello, thank you for your question. Speaking of "rod" cross-sections, this specific "alpha" angle doesn't specify the rotation of the CSS. It has to do with the discretization of circular cross-sections. In fact, this parameter is obsolete and I believe that it will be removed in the next release.

[johnnyontheweb]

This was truly unclear, now the drawing makes sense. I hope this would be removed, especially if this parameter cannot be controlled by IOM.