I have designed a simple (as in, all flat polygonal surfaces) knife blade as a T-Spline. I would like to convert it to a solid. However, the convert command returns this error: "Surface G1 is discontinuous." I do not know which surface is G1 nor can I see any discontinuities (other than the creases). Because the shape is so simple, box view looks almost exactly like smooth view, and I can see that there are no intersections. Repair body does not identify any problem points, although I do have some star points and triangular faces.
What does this error mean and how can I fix it?
Thanks
Can you perform an "export archive" on the file and upload the resulting F3D file to this thread? You may need to zip the file before uploading to the forum post. If you'd prefer, feel free to e-mail it to me at nathan (DOT) chandler (AT) autodesk (DOT) com.
Thanks,
rnl9t,
The creases you added in the vicinity of the star points is what led to the error in conversion. The error message really isn't much help in giving you a way to fix it. That is something that is being worked on currently. Feedback on conversion failure are being improved and visual feedback on where the problem is as well. To be honest I don't know yet what the error is trying to convey but I can tell you where the problems probably originates.
Star points and creases don't get along very well currently. In your design there were creases added for the back of the blade that pointed right at star points. That caused the problem. It is hard to make the T-Spline both edgey and smooth at the same time. Again something that is being worked on. To address this I tried two different approaches. First I removed the creases. That solved the conversion problem but I think the results may not be what you wanted. The other thing I tried was to add some edges (Exact option to keep the shape) between those that were crease and the star point. That seemed to keep the creases but took away any smooth areas you may have intended.
I could suggest another approach which would be to use the Model workspace to define the blade and use sketches to remove portions of the blade blank through sweeps or extrusions. Sometimes T-Splines may not be the best approach. Certainly for the handle it makes sense.
Thanks
I seem to be running into the same kind of problem when trying to turn a T-spline into solid body, the message says: " The operation failed due to a G1 discontinuity in a surface.
Try adjusting the values or changing the input geometry."
and i tried un-creasing the edges that are close to the problematic zones, but it doesn't seem to do anything at all... if anyone could help me?
Tsplines like to have even numbers at intesections; a situation such as this might be recitified by adding a row extending through those T-intersections, trasnforming them into X's. Of course, this may cause simmilar problems along the new path; I take great care to avoid odd nodes, ensuring that each line is ultimately a loop that eventually finds itself is one way to do that.
I believe the problem in his case are the partial creases.
Learn to avoid these and add edge loops.
Can you share your model ?