At the moment I have 6 points in each cross section but I may add more.
I have manually created mesh faces from 2 cross section points so if I take points {0;0} {0;1} {1;0} and {1.1} I can make a mesh face. Then {0;1} {0;2} {1;1} and {1;2} and so on until {0;4} {0;5} {1;4} and {1;5} and I have one row of mesh faces. I need to do this all the way along the shape until it is covered. I can then mirror this and add a nose and tail to make a closed mesh.
No prizes for guessing what it is.
I can’t figure out how to select the points from the cross sections and feed them into a Construct Mesh
The end goal here is to create a coarse mesh that can be converted into a SubD. I’m trying to keep some control over how the radius along the edge changes from sharp at the tail end and more rounded towards the nose. (+Y)
OK, thanks for this but what I want to do is create a mesh directly from the points.
The way you have done it would be great if Delaunay produced a quad mesh which feeds into SubD nicer IMO.
Also I think Loft is a bit of a heavy calculation.
It feels like I’m losing control of the mesh a bit because it goes through a loft, then delaunay and I then need to get it back to a quad mesh (I think) for it to translate to SubD well.
Here’s how I would do it if there were just 2 branches of points (i.e. 2 cross sections)…
with regards rocker, I’m sure there will be some SUPs with no rocker whatsoever but every one I’ve ever stood on has at least some rocker on the nose and I don’t recall seeing one that was totally flat. I will take your word for it though as its not worth arguing over.
Yes, I’ve noticed this on the SubD too. Its partly down to the way I’ve created the height of the points that run down the centre of the board on the top surface and possibly due to how I tried to keep the mesh faces quads at the nose and tail of the board.
When I create the point heights properly this almost goes away. I probably need to split this issue to a separate thread about subD…
Attached is the SubD Board with optional rocker and both @Joseph_Oster and @HS_Kim mesh from points solutions if anyone wants to look at how to get rid of the little blip on the surface. Sorry you don’t have SubD Joseph. SUBD_BOARD.gh (45.8 KB)
@HS_Kim Thank you! That’s a nice solution. I don’t know why I have a mistrust of the Loft component… I think I have been conditioned to think I should not mix Breps and meshes and rely on converting between them in case some scenarios fail. @Joseph_Oster also used lofts in his first solutions so maybe it is unnecessary to only build meshes from points.
This turned out to be just a setting on the SubD that I had got wrong (Used Interpolate = TRUE)
I almost didn’t post this after seeing the solutions already posted. I feel like a beginner at grasshopper compared to a lot of people in this forum, but I’m still learning.
First time I’ve used the Relative Item component. It seems to work well in this case.
Out of curiosity - because i’ve been trying something similar (without sub-D - which i quickly gave up before learning more like here! Thanks very much for the pointers!). But how would you make a double pintail? How would you create the fin boxes?
I ask this because it was quite a pain for me in this model…!
First result with CNC… Scaled to wood block i had handy.
