curve- , Bref- tutorial

Hi

I'm looking for a tutorial especially about curve modelling, because I think there must be more things posssible, than taking curves directly from rhino.
I'm very new in grasshopper and it would great to take a look on how professionals work with realistic design-products, built out of parametric curves manipulated with grasshopper. And with following surfaces, which depend on each other, and are all together at the end a closed BRef. (like in solidworks)

As I told, I'm very new in Grasshopper, but nevertheless I want to ask something even it is ... ;-) ,
Is it right, that perhaps in grasshopper you work in annother way or philosophy with curves and surfaces than in rhino ? ... perhaps more in a way like with meshes ??
Or can you also build a surface based on other surfaces with a tangential connection ?

Perhaps someone know some good tutorials.

thanks for all

greetings from berlin

carsten

Replies to This Discussion

Permalink Reply by Dirk Anderson on June 5, 2009 at 9:31pm

It's probably best for you to start with the Grasshopper Primer V2, and RhinoScript 101. Hopefully this will give you a better understanding of parametric modelling in Grasshopper and methods used to generate particular geometry.

Permalink Reply by carsten schlichting on June 6, 2009 at 4:39am

Hi
thanks for answer.

I know the grasshopper Primer V2 tutorial, but I didn't find a tutorial, in which surfaces depends on other surfaces. It would be great to see one time in a tutorial, how user analyze surfaces and take the infornation to new surfaces.
Is it true, that in grasshopper _NetworkSrf und _Patch didn't exist directly.??

Permalink Reply by Damien Alomar on June 7, 2009 at 8:55am

Neither of these are in the Rhino SDK, so you're only options are to script them which isn't a very good solution.

Permalink Reply by carsten schlichting on June 7, 2009 at 1:00pm

Hi

Thanks for answer.
First .. I decided to read the rhino script primer to get a more and deeper understanding of all. And so I must ask this question again later.

But nevertheless - what means exactly, that these function are not in the rhino SDK?
- That these function are only directly in rhino available, but not in rhinoscript?

And is there beside this bad solution a good solution? Or will these function perhaps be part in a later beta of grasshopper .

Permalink Reply by Damien Alomar on June 7, 2009 at 10:42pm

It means that there is no function with the Rhino SDK (Software Development Kit) that will allow you to perform that operation. So the only option that is there is to essentially run a command macro through your dot.NET code. This is the same as if you typed the command in Rhino, so you'll have to track down the object that was created, pull that into grasshopper and then most likely delete the surface you just created. Because you're running an actual command, all geometry that is needed to create that surface needs to be part of the rhino document, so if you have some base curves with GH, you'll have to add those to the document and delete those as well. This is all limiting, time consuming, and cumbersome, but you also are limited to what you can do through the command line with those commands. So things like picking an edge and setting up tangents with other surfaces won't be possible, since you can't pick an edge through the command line.

Permalink Reply by carsten schlichting on June 8, 2009 at 2:33am

Pfhhh ... this sounds not very good.
but I see the command "Surface From Points" .

Perhaps this could be a usual way to build surfaces like _Patch. (together with common scripts and trim-commands)

Perhaps there is a tutorial for this ?
Or a common sketch how you can build smooth surfaces with this command together with some script-classes and so on?

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