Grasshopper Tutorial 04 | Dividing Surfaces

Tutorial for the Visual Programming Basics course at RWTH Aachen.
Covers:
- dividing the UV Domain and IsoTrim
- dividing a curve to divide a surface

[@ninalatorre6600]

GOD BLESS! thank you thank you thank you from Miami!!!

[@constantinosschinas4503]

you can calculate a somewhat rectangular subdivision by averaging the opposite surface edges, and use their ratio to drive the domain UV divisions. It's not perfect (for some reason they don't permit floating point in UV divisions) but it is automated so you don't have to manually eyeball every time you change surface input. For curved rectangular surfaces, facades, even pretty distorded etc (ok, balls won't work) it is quite handy. For very bulgy surfaces, you can extract middle isocurves and use them alone or.for averagings, to get the ratio. ps. you can also drive a quite good real scale size for your ie. windows/facade panels this way. just divide the size you want with the averages you already calculated, and you automatically get your U and V subdivisions. this means that as you alter your model or apply the same paneling to new geometries, you work always with the maximum size permitted, by each material or construction technique.

[@SAISAI-kv7ds]

HALLO, I tried to divide the surface with angles(such as square), but it doesn't recognize the Brep.

[@alializadeh8195]

thanx

[@bk3310_hd]

I want to get NURBS data (control points in u and v directions, knot vectors in u and v directions and weights of the control points) of a trimmed surface. Is there any way to make this happen in Rhino or Grasshopper?

[@alexhu5696]

COOL!

[@shafinhaider4905]

I want to create a mesh using equilateral triangles. (not by assigning u and v numbers). Is it possible in rhino or in grasshopper or any other plug-in of rhino?

[@TheSameDonkey]

It definitely is, but equilateral triangles tend to give you planes. So if you want to say take this wobbly surface and convert it to a mesh of equilateral triangles then I think you might be asking for the mathematically impossible. You could, however, make a definition that takes a surface makes a mesh of triangles without much difficulty if you don't have the requirement of them being equilateral

[@franzolubitz9035]

krass！