I am using Grasshopper to create some Nurbs text objects and want to export them for 3D printing.
Something strange I noticed though is that if I bake the nurbs object and try to export to say .stl that obviously Rhino needs to turn it into a mesh first and is giving me some options. If I leave at the default then it takes quite a long time (around 6 seconds) and the resulting mesh in many places is off by quite a lot (see images below).
If on the other hand I create a mesh in Grasshopper using the default Mesh Brep component with the Settings (Quality) (Smooth) then that process takes around 500ms, so half a second and the resulting Mesh is much more accurate and around 20 times smaller.
How come there is such a difference in time and quality?
Can the Rhino exporter somehow use the meshing algorithm Grasshopper is using instead of its own if it appears to be that much better?
What am I doing wrong?
Here is the comparison:
Detail on the original nurbs object:
Detail on the mesh created in Rhino:
Detail on the mesh created in Grasshopper:
In the attached .3dm I removed the mesh created by Rhino as it was increasing the file size by >25MB. Just select the Nurbs object and mesh with default settings.
My default settings:
word_object.3dm (6.2 MB)