Hello Laurent,
I have posted the same question actually on the block that is related with the pleat creation but nobody replied 
to me so far . So I though I could ask you to give me at least some kind of advice/ direction on how to go about it ? I struggle with C# , i wanted to project points from the curves on to the surface but I am stuck - so i can create some points so can I play with thr shape them with kangaroo. All I want its advice on how to project points on to the mesh . the actual post is that one :
Can you please advice me …
Thank you in advance for any advice