I have tried to create GHS input to Autoship Modelmaker (.GF) using the AttachGHSdata function in Rhino, but the curves become unspeakably coarse. This is not improved by refining number of stations, it is the curves themselves that seem to be straight lines from just 4-5 points. The model is created originally in Rhino. I have tried to create GHS data both from shape and from curves.
If anyone has any idea of how to solve this, please assist.
I’m not a GHS user but was curious about your question. From the AttachGHSdata help AttachGHSData | Rhino 3-D modeling It appears that GHS uses polylines as input.
GHS represents volumes by a series of closed polylines (stations). These are cut from the meshes for Rhino geometry.
Are you trying to use GHS data to transfer the shape? Keep in mind that GHS data was designed to provide input to stability contributions with sufficient accuracy, not to directly represent the shape.
Hi, yes I am trying to use GHS to transfer the shape to the stability software we are using (Autoship Modelmake/Autohydro). I do not need a perfect representation, but the curves I get are basically tree or four points with straight lines between them, and that is not sufficient.
Refine the render mesh. It looks like Rhino creates the GHS data from the render mesh.
Options > Mesh You may need to experiment with custom settings. The simplest place to start is to set number of initial quads to a large number such as 5000 or 10000.
Hi David, thank you very much, that solved it!
I had modeled in m while the mesh was in mm, so it became too coarse.
Appreciate it!
Hi @morten.forsberg,
Autoship supports DXF and IGES files, I don’t understand why would you go for mesh/polyline export.
Simply export your geometry as iges and import it into autoship.
Hi Ivelin,
I got trouble with the IGES/DXF import function in modelmaker, so I did not pursue that further. Could have been due to the unit mismatch. I will try that the next time.
Thx
@pascal Perhaps AttachGHSdata needs the option to refine the mesh for purposes of the command similar to that provided in Zebra, EMap, CurvatureAnalysis, etc.