Issues with polygon results of multi-slicing about steptoxsection

[aleutgeb]

Hello,

currently the command line utility extracts contours using the ply format in the following way. In the case of the format "ply_edges" the ply file contains elements with two vertex indices per element (line segments). In the case of the format "ply_polygons" the ply file contains elements with an arbitrary number of vertex indices per element, where two neighboring vertices represent one line segment of the contour. According to the ply specification (http://paulbourke.net/dataformats/ply) faces with more than three vertices are interpreted in a triangle fan way (center of the fan is always the first vertex). Because our tools use the sequence of vertices only for contour information this is not an issue for us, but 3D viewers will interprete the sequence in a triangle fan way resulting in an erroneous visualization (see your illustration).

Kind regards,
Alex

[yvanblanchard]

That's very clear. Thank you Alex