...
If the default conversion option “NURBS” is activated, the Retransition back to a NURBS-Geometry (CAD) runs automatically. In this case please continue with Step 2.
If the conversion option “Facet” is activated, the Facet-Geometry is transferred to the Pre Processing.
With the Facet to NURBS Tool in the Geometry Edit Tools the STL-file can be transitioned to a NURBS-Geometry. Therefore, the Automatic Size Calculation and the Partition Preview can stay active. The NURBS Face Density influences the number of patches merged together to one bigger patch. A low density value means that fewer, bigger patches and a high density means that more, smaller patches are created.
With the middle mouse button (MMB) the operation is executed.
In a first step a preview of the partitioned quad mesh is shown.
If the partition looks satisfying the NURBS patch creation can be started. If a higher precision is desired the NURBS Face size can be varied manually. To change the size of the patches the NURBS Face Density can be modified.
When the transition is finished, the status bar in the bottom left displays “NURBS is created based on partitioned Facet Body” and a new solid shows up in the model tree.
From time to time and depending on the geometry some NURBS patches might fail. These will be displayed in the status bar as well. If this happens the geometry can be repaired manually. How this works is described here.
Step 2: Geometry Cleanup
...