Hi everyone, Happy new year! I’m reviving this thread with the hope of having constraint back into the development pipeline. I send a letter to Santa asking for constraint integration into Rhino sketches and, because I was really kind, also full implementation of Bongo 3. Thanks Riccardo

I find I’m using Rhino less & less and pretty much only use it for grasshopper these days. Majority of my work requires regular design changes (especially during prototype phase & printing parts) and it takes far too long to change geometry in Rhino vs. parametric software. I could never do this qui…

Parametric changes are limited to parametric shapes, i.e. basic geometry such like cylinders, boxes, fillets and adjusting the position of holes. There was one exception, a program called SolidThinking, which was able to modify models locally (similar to what “Box edit” in Rhino does, but more adva…

[image] Rhino_Bulgaria: Parametric changes are limited to parametric shapes, i.e. basic geometry such like cylinders, boxes and moving holes. Everything is parametric…sweeps, blends, fillets etc. If I build a surface from curves and the geometry that forms those curves changes, then the surfa…

It’s not that people don’t need parametric function. Parametric programs are quite limited when it comes to free-form surface modeling (which is the primary purpose and strength of Rhino). I create models for 3d printing, but they are not cylinders, boxes and other basic shapes that could be adjuste…

as Rhino is quite strong in the educational context - already the argument: students need to learn the concept of sketch, constraint, feature is very strong. Many of my students have to learn another CAD after their diploma and it would be easier to give them a foundation for this step. Currently …

Every shape can be created with parametric software. If we start calling these systems by their proper name, feature based, it becomes easier to understand their capabilities. What this software does, much like Grasshopper, is rebuild the entire model every time a change is made. Unlike Grasshoppe…

[image] skysurfer: I can build that shape in Onshape without any issue. I would gladly watch a video that shows how that ring is being modeled in Onshape parametrically instead of using surfacing tools.

[image] skysurfer: feature based I like the name implicit cad. By combining features you create a recipe … You do not explicit generate unrelated geometry item s.

[image] Bobi: ring is being modeled in Onshape The big challenge for implicit modeling is change in topology in multiple depending features Meaning another number of surfaces or edges…

You can build this using parametrical surface. And here become the power: you combine surface modeling of complex shape with fast rebuilding of the model. For certain application is a game changer way to build shapes. The cons is that you require to setup the correct set of constraints at the begi…

McNeel Forum

Will Santa and 2025 bring constraint back?

Serengeti (Rhino BETA) Constraints

Tom_P November 16, 2025, 12:24pm 34

@Rhino_Bulgaria
here you go - i started a separate topic - if anyone ones to try it with grasshopper - good luck, even if the first version of grasshopper was called “explicit history”

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Will Santa and 2025 bring constraint back?

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