NURBS, the parametric representation of curvy geometry, is at the core of Rhino's capabilities. Likewise, some of the most powerful features of Grasshopper leverage Rhino's NURBS tools. This video uses surface sampling to illustrate the basics of NURBS and discusses some examples of how that can be used throughout your Grasshopper workflow.
- [Instructor] I have my exercise file open already. … At the core of Grasshopper is Rhino … and at the core of Rhino is NURBS … or Non-Uniform Rational B-Splines. … NURBS is the math, … the functionality that enables us … to do complex geometric operations … accurately with curvy surfaces. … A great way to understand NURBS, … is to interrogate the process of sampling. … This is really how NURBS works. … We give inputs control points … and the NURBS math returns the locations … in space along a complex surface. … So in Grasshopper, … I have a 2D slider set up, … which enables me to move a point … and that point is from zero zero … to one one in the Cartesian system. … Then I have a surface here, … so I'm going to bake the surface into Rhino … then I'm going to select the surface … and re-import it back into Grasshopper. … This enables me to make changes in model … that I'll see within Grasshopper. … So let's do some sampling. … I'm going to go to surface, evaluate surface. … I'll plug in my surface and plug in my point. …
Note: Because this is an ongoing series, viewers will not receive a certificate of completion.