SubD shape fitting with degree curve (continuous curvature)
In Alias Speedform there is an extremely helpful and cool feature to adjust the SubD shape.
You can select a range of edges and align them using a degree curve or adjust them using the degree curve. This has the advantage that you don’t have to move each point, face or edge individually by hand. Another huge advantage is that the result has a totally clean gradient with little effort. The degree can be determined for each curve. So the curve to edit can be very simple with 3 degrees or more detailed for example with 5 degrees.
The finer the mesh, the more useful this feature is.
Rhino really needs this feature.
Or even better.
In Alias Speedform you can use only one degree curve for a selection of edges. You could also extend this feature.
-It would be cool if I could adjust multiple selected edges with one curve in parallel.
-Cool would be the same principle with faces. If a selection of faces could be adjusted and/or aligned using a surface.
The video shows a selection of faces that is adjusted with a grad curve. (Alais Speedform)
The sequence of images shows the selection and use of the feature in Alias Speedform.
softtransform is for me a completely different tool and very inaccurate.
the align to curve tool is helpful and can produce a good result. but it’s just not the tool i want to get to the target quickly and accurately without fiddling around.
what is missing from the tool is that i can adjust the target curve afterwards and the subd surface changes accordingly. then it would be quite similar to the tool from alias speedform. but still more cumbersome.
"edit by curve from alias is a powerful tool without a cumbersome workaround.
I know the tool “align to curve”, but a bit impractical and it is not customizable. I can’t directly adjust the result with the CV points.
In this sequence of images you can see the problem that I change the curve, but geometry does not, even with history turned on.
This is exactly where the strength of the “edit by curve” tool from alias.
Unfortunately, none of the issues have been addressed in the current Rhino wip.
-No tool similar to “edit by curve” from alias / speedform.
-Align by curve still doesn’t have the possibility to change the result with the target curve (CV Points). you still have to repeat the procedure every time until the desired shape is reached.
Best would be both tools! something like edit by curve and align by curve improved. because both would have own small advantages.
@ rhino: please make at least one of both possible in rhino 8.
This would make SubD a lot more precise.
Hi @nik.mvk! As @Tom_P suggested, you should check TestSubDEdgeMatch, a new test command in Rhino 8 WIP . This test command should be able to help you fit a set of SubD boundary edges to a target curve. History is not supported yet, but we are working on it so that you can modify the target curve after and get the SubD match updated automatically.