Problem with lofting in grasshopper/python

Hi all,

I'm a beginner using python and also in the programming world. I got into a problem I cannot find the reason why it does not work, so maybe some of you can give me a hand.Thanks in advance.

I have two lists of planar curves each list lying in a plane. Both planes are parallel and separated x distance. I would like to make a loft between the curves of list 1 with the corresponding curves of list 2. I made a loop to automate this:

curves1=[]

curves2=[]

lofts = []

for i in range (0,int(N)):
....loft=rs.AddLoftSrf ([curves1[i],curves2[i]])
....lofts.append(loft)

To get the resulting list of lofts in grasshopper I do:

a=lofts

However the lofted surfaces do not appear in the rhino screen and in the a output of my python button it says: "Ironpython.Runtime.List" I know that the outcome must be a list, but why can't I see on display the lofted surfaces?

I realized that if I call a= lofts[0], the lofted surface "0" appears (so the list is working), but I would like to get all of them without calling them one by one.

Any help will be welcome!

Replies to This Discussion

Permalink Reply by djordje on January 16, 2014 at 12:01pm

Hi allanimals,

rs.AddLoftSrf() function returns a list of lofted surface identifier that you created.

So what you are doing with each iteration is: adding a list (with a single item in it: identifier of a surface) to a "lofts" list. It's a list of lists, and Grasshopper does not understand that.
You can solve this by appending only the resulting surface identifier itself, instead of a list: