Im having a blast in Rhino for the last 50 days but one issue keeps coming up again and again:
The inability to join surfaces that I created using crv2View and loft and/or patch.
I have learned that refitting curves and rebuilding surfaces sometimes helps but the lost accuracy (since they deviate from my original curve) causes other problems down the line. I rarely ever get the patch tool to join with my other surfaces. Very annoying since there is also no tolerance indicator and I have no idea how many faces I need in order to match with another edge within tolerance.
I have also learned that surfaces created by extruding a control point curve are not compatible with flowalongsrf a lot of the time because the isocurves are not spaced evenly.
Is there a rule of thumb or a video that goes into the topic or fitting and refitting or am I doing something wrong?
I would add the following:
Avoid YouTube videos that teach you to rely primary on “Network surface”, “Patch” and “Blend surface” with hundreds of spans.
When I have the curves, I would extrude the curve and trim the rest but how would you close this body if you have no original curves? (Like when you used offsetSrf to get a new edge offset in the direction of the normal of the lofted surface?)
Also some functions require rebuilding. If I try flowalongsrf stuff distorts otherwise because the isocurves of the surface are not evenly distributed. - This stuff overwhelms me because that then causes other things not to fit within tolerance anymore.
I don’t know where to start or even how to phrase my problem really. Sorry. If I had a specific case, I would have posted. Like my last post, that nobody replied to. Issue with PointDeviation not showing any deviation?
Rather than getting sucked into “clickety-click quick-fix” tools, best is to start learning NURBS surface modelling principles, the type of 3D modelling Rhino was made for, and there are many beginner tutorials available to get you started (select topics on the left). There’s also some information about curves and surfaces here (scroll to the bottom regarding links to some all-important “curve and surface anatomy” topics).
These YouTube videos by @sgreenawalt are very good for the beginner; and I’d say even for novices, because you immediately steer away from botch, notwork surface, and boo ; )
In the picture I don’t see any need of patch or complex construction.
The extruded surface was made from the side curve so extruding the side curve would create a “perfect enough” intersection that will let you to cut them and join everything into a solid.
Luckily @Lagom didn’t read you were using Crv2views… another tool that, imo, should be dismissed.
You better to extruded all the curve and wimpy get the intersections between them ( for this specific case)
FlowSrf need to match two surfaces so it’s based on the parametrization of both. This means that more dense the iso curve (number of point) less distorsione there’s in between them so the deformation gives better result. For this rebuild is a must to do, normally I do 32 or more point trying to achieve a quasi square subdivision.
