fcad2017_ai6zun has 46 post(s)

If you’re curious to learn more about NURBS and continuity control, I’m sharing a couple of links that go more in depth on how this geometry works.

These series of articles are intended for Alias users, and although some tools and terminology is different, the theory is the same for Rhino. I would start with the “theory builder”:
http://www.aliasworkbench.com/theoryBuilders/

The section on “Golden Rules” is good too. We don’t necessarily follow all of them because some of them are specific to the needs of car body design and others are more finicky that are necessary at our skill level:
http://www.aliasworkbench.com/goldenRules/

See the rest of this site here:
http://www.aliasworkbench.com/

This article links to a somewhat comprehensive definition of NURBS
http://www.rhino3d.com/nurbs

The Wikipedia page for NURBS is also a useful reference:
https://en.wikipedia.org/wiki/Non-uniform_rational_B-spline

This has a relatively easy to follow, but very thorough discussion of the important terms:
http://www.pilot3d.com/NurbSecrets.htm

This article links to two other that are more deep in their description, with equations and formulas that are quite complex:
http://www.mactech.com/articles/develop/issue_25/schneider.html
http://web.cs.wpi.edu/~matt/courses/cs563/talks/nurbs.html

I will try to add the exhibition catalog to a course reserve in the library. Below are some slides I have put together.

Advanced: Build the “scoop” object shown below. It does not need to be a solid, and you only need to build one; three are shown to indicate the form. This Rhino file has some of the curves that can be used to build this object.

Top and Front Orthographic Views:

Potential Application:

Beginner: Working from the provided Rhino file, build the form shown below (do not use the patch tool!)
Orthographic Views:

Finnish designer Stian Korntved Ruud did a project where he made (and designed) a different wooden spoon every single day for a year. I think this is an interesting project to consider in light of our current cutlery design project because working within the category of spoon you can see some designs that are fairly conventional and familiar, but also others that are definitely outliers for what’s acceptable for the category. And if you can imagine having to come up with a new design for a spoon everyday, you would be forced to really understand the boundaries of the category. See more about the project (including an image of every spoon – I think) from the designer’s website here:

http://www.stiankorntvedruud.com/Daily-Spoon-2014-15-1

Beginner: Build a model of the metal spoon that has been distributed in class. Orthographic top and side view images of the spoon are provided for your convenience below.

Advanced: Build the common disposable plastic spoon depicted below. This object will be distributed in class for you to inspect. This Rhino file provides some of the curves you can use to build this object. Begin by building just the “top” surface of the spoon (as shown below) – don’t worry about giving it thickness or making it a solid. If you succeed with that, try to complete the “bottom” and other surfaces necessary to form a solid.

Here’s a link to the Bank Building CNC machine website:
http://risdbankcnc.squarespace.com

You can get the tool library for the Bank Building CNC on this page:
http://risdbankcnc.squarespace.com/import-to-mastercam/

I’m sharing the slides we looked at in class this past week. Enjoy!

This series of videos shows how to set-up a file in Rhino for export to MasterCAM, roughing and finishing operations, and “flipping” the part in MasterCAM to cut the second side.

If you need a refresher of the surfacing commands we have covered (sweep 1& 2, loft, networksrf), you can download the PDF file below. This tutorial will cover the steps to build the mustard bottle shown below.  You can also use the images below as textures to create a realistic rendering of this object.

http://cad2017.christopherspecce.com/wp-content/uploads/2017/10/MustardBottleTutorial.pdf

Build a model of the canoe as shown above. The Rhino file linked below includes some useful geometry for building this object.

http://cad2017.christopherspecce.com/wp-content/uploads/2017/10/CanoeExercise.zip

Build a model of the toy boat indicated in the orthographic views below (click on each image for the full size, uncropped file).

Here are the Grasshopper definitions I showed last week, with several variations on how to draw a star.

http://cad2017.christopherspecce.com/wp-content/uploads/2017/10/StarBuilder.zip

As I mentioned in class, the Grasshopper Primer is a great text to start with.
http://grasshopperprimer.com

Another great series is “Grasshopper Getting Started”, which are hosted by David Rutton, who is the creator of Grasshopper. It is from a few years back, but still a good thorough introduction.
https://vimeopro.com/rhino/grasshopper-getting-started-by-david-rutten

Lynda.com also has a 4 hour grasshopper course that looks pretty thorough. All RISD students have free acess to Lynda.com, you just need to register for an account while you are on the campus network. After that, you can access it anywhere. See more here about accessing your Lynda account.
https://www.lynda.com/Grasshopper-tutorials/Up-Running-Grasshopper/174491-2.html

See more options here:
http://www.grasshopper3d.com/page/tutorials-1

Write a detailed set of instructions describing how to draw a 5 pointed star. If this proves too difficult, do the same for a triangle.

We didn’t look at this in class, but the “History” functionality in Rhino could be very useful as you are work on building the bentwood chair. This functionality will link input and output geometry. In other words, it can connect a curve (input geometry) with a pipe (output geometry) so that if the input curve is manipulated, the resulting output surface will follow this change.

More information here:
http://docs.mcneel.com/rhino/5/help/en-us/commands/history.htm