Trimmed parametric surface in Blender Geometry Nodes vs Rhino Grasshopper

[@thierrycaracalla1139]

Hello ! I appreciate your videos, it's clear. I've one question : Wich software is better for an architect according to you and your experience ? Blender or Rhino3d ?n. Thank you !

[@UHStudio]

Hi! I would say both. Rhino is Nurbs and has Grasshopper, excellent documentation capabilities, and works well with Revit. However, it is too precise for early conceptual work and even though it uses Cycles, the implementation is not as good for rendering as in Blender. Blender, has excellent inherent parametric modeling capabilities that allow you to be as fast and precise or imprecise as you would like to be to get the ideas flowing. Blender also fits conveniently in between the explicit and completely non-parametric modeling in Rhino, and the completely parametric, but sometimes it-just-takes-too-damn-long-to-construct in Grasshopper. And of course you can render really well with Cycles inside of Blender. But Blender's documentation capabilities come from addons like BlenderBIM and MeasureIt Arch, which are themselves in early development Sorry, not a short and sweet response, but if you have any more questions shoot them :)

[@UHStudio]

Maybe that should be a video to talk about when and what each is useful for? 🤔

[@dannel_reskala]

@@UHStudio i would really love to see the process 'after' the blender phase. Like how do you convert these conceptual meshes into a parameteic model, then into the documentation phase

[@archjenifer8964]

Whoa ! Watching your work is just like watching a thrilling movie ! Yay! I have started Rhino. Once I get a basic control on it I'll start blender too. I'm so excited!

[@UHStudio]

Thanks, and let me know how your learning journey goes

[@archjenifer8964]

@@UHStudio Sure! Definitely I will !

[@PeterBoronski]

Hi Dimitar, I have just come across this and it is awesome! It has very practical applications for architecture with distorted wall or roof framing. But I would really like to know how to put a profile onto the lines joining the two curves. This would really add to the functionality of it. (An H profile for steel or a simple rectangle for a timber wall frame). Can you point me in the right direction to execute this??

[@jimmyjames6913]

HI fantastic to find somebody else who uses GN und grasshopper :) very interestingt! I wish I could just graft a list- or do other such simple grasshopper operation! Did you find a decent workaround to deal with the missing listhandling in GN?

[@UHStudio]

Coming from GH to GN was indeed a struggle for simple things like that! They are adding more data-based parsing but no where as much nodes as in GH or Sverchok. Having said that, the mentality of working with it needs to be a bit different than GH. For example, in GN, instancing on points and then modifying the result with set position is different than in GH where first we set out the points in the correct order and data format and draw curves or whatever else on top of them. So for something like graft, in the most typical base case scenario of points aloing the U and V of a surface where you want to create curves based on points in the perpendicular direction in GH, in GN you would simply add a mesh line and instance the perpendicular geometry on the points.

[@charbelchagoury3755]

Hi any idea how I can extrude a face from an object along a drawn curve in blender? In maya you can select a face and a curve, do extrude and pick the option to extrude along the curve

[@UHStudio]

You can do a straightforward sweep in Geometry nodes with the Curve to Mesh Node.

[@charbelchagoury3755]

@UHStudio oh cool, thank you btw, I saw the building model you worked on while you were at HOK in Nigeria Lagos airport, thought you'd like to know that, also wanted to send you pics on your insta page

[@hakankosebas2085]

could you do geometry node setup for surface morph command in grasshopper

[@UHStudio]

Do you mean like taking a flat object and apllying it onto a surface? That's essentially a tessellation. Take a look at my videos on the Tissue Addon, as it does precisely this.

[@UHStudio]

There are also node groups that do tessellations in geometry Nodes. However, quite a few of them are paid, like the Erindale Toolkit.

[@neilmarshall5087]

Hi. So (in Blender) do you know how to do this with the bottom curve split into two sections? Your setup will only use the first section/island....

[@UHStudio]

Sorry, I don't understand your question

[@neilmarshall5087]

@@UHStudio If the bottom curve is split into 2 parts your nodes ignore the second half. Imagine 2 sections of roof joining. Or fingers joining the palm of a hand. How do I make this work - so the node setup sees both parts of the bottom curve and joins both correctly to the top curve. Thanks for the attention...

[@UHStudio]

@@neilmarshall5087 for two separate bottom curves and one top curve, you would either have to separate the top curve and perform the operation twice or combine the bottom curves into one curve. But if there are sharp corners, the perpendicular curves will be hard to control, so better split the 2nd curve

[@neilmarshall5087]

@@UHStudio OK. I will be looking at the Sample Curve Node after watching Erindales latest video. That seems to offer a solution.

[@rajendrameena150]

Every video of your confuse me between Rhino+grasshopper and Blender+geometry nodes, the two big ships for the journey of parametric modelling. One is established path and other is growing so phenomenal with diversity that we can't ignore. Can you describe the fundamental difference on both approach. Even now the boundary line between nurbs and mesh is getting shattered when i progressed because there are plenty of addons in blender which use curves to generate mesh and even some addons like mesh machine, loop tools which allow you to change density of surface later on, it is just the matter of time when blender will surpass it.

[@mrsuper21100]

Hello Dimitar! Ты знаешь русский?

[@UHStudio]

Hi. No, but close - Bulgarian

[@mrsuper21100]

I asked because your last name is similar to Russian.Okay I'll think about it🎉