Hello all,

I have created a bridge superstructure cross-section in the X-Z plane from lines (Node: <Line3D>) and would like to rotate it first around two axes (Z-axis: consideration of skewed structure with crossing angle not equal to 100 gon / Y-axis: consideration of cross slope) (Node: <Rotate>) in order to extrude the cross-section along a path afterwards. The result is shown in Figure 1.

The aim should be that the cross-section retains its shape and size regardless of the rotation and thus the dimensions remain identical in the view from the front (e.g. carriageway width). By extending the x-values of the lines (sine function) and correcting the cross slope, I was able to model the skew without any problems (see figure 3). However, when rotating around the Z- and Y-axis at the same time, it shows that the cross-section changes its shape when skewed and cross-sloped (see picture 2).

Does anyone know how I can solve this problem? In picture 3 I have drawn a more accurate representation of a rectangular cross section, how the rotation around the Z-Y axes should be done.

Thanks a lot

Marco