Python Error

Hey all,

There is something wrong with the way that I am doing this, but I can't figure it out...extra eyes please.

Took this simple fragment from some other code I am writing, which is erroring and I can't see why...it's got to be a simple solution!!

line 9 is where I call SurfaceClosestPoint

import rhinoscriptsyntax as rs

cpoints = []
cpoints = points
cp = rs.SurfaceClosestPoint(surface, cpoints[0])

Runtime error (TypeErrorException): Parameter must be a Guid or string representing a Guid
Traceback:
line 468, in coerceguid, "C:\Users\Aaron\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\utility.py"
line 465, in coerceguid, "C:\Users\Aaron\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\utility.py"
line 547, in coercesurface, "C:\Users\Aaron\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\utility.py"
line 1564, in SurfaceClosestPoint, "C:\Users\Aaron\AppData\Roaming\McNeel\Rhinoceros\5.0\Plug-ins\IronPython (814d908a-e25c-493d-97e9-ee3861957f49)\settings\lib\rhinoscript\surface.py"
line 9, in script

Replies to This Discussion

Permalink Reply by Marios Tsiliakos on January 1, 2014 at 12:41pm

Hi,

what are you feeding into points? rhino geometry or gh created geometry.

Try to switch your hint as ghdoc to see what happens

Best,

Permalink Reply by Aaron M. Ryan on January 1, 2014 at 12:46pm

Marios,

I'm feeding gh points (from a curve divide) into the ghpython component type hinted as Point3D with List Access enabled (although switching to Item Access doesn't change the error).

Changing the type hint to ghdoc doesn't modify the error and No Type hint doesn't change anything either.

Permalink Reply by Ethan on January 1, 2014 at 1:15pm

im a beginner at python but i think whats happening is your overwriting your list rather than adding your points to it...maybe try :

cpoints = []
cpoints.append (points)
cp = rs.SurfaceClosestPoint(surface, cpoints[0])

Permalink Reply by Marios Tsiliakos on January 1, 2014 at 1:20pm

Well,

I seems to work for me mate. Makes sure both inputs are ghdoc. first one list and the second one item.

Best,

Permalink Reply by Aaron M. Ryan on January 1, 2014 at 2:18pm

Ok...here is the most basic version of the script and the Rhino Surface (.3DM)

If I change the second input to List Access, I get results, but they are not properly output as a UV point or even a list of (u,v,w)..instead it is broken into two items in a list--missing the third, "w" value.

Thanks again for your help.

Attachments:

closestPointTest.gh, 11 KB
surface.3dm, 170 KB

Permalink Reply by Marios Tsiliakos on January 1, 2014 at 4:15pm

in the component

import rhinoscriptsyntax as rs
#this is the u,v
uv = rs.SurfaceClosestPoint(surface, points[0])
u=uv[0]
v = uv[1]
cp= rs.EvaluateSurface(surface,u,v)

Best,

Attachments:

closestPointTest_rev1.gh, 16 KB

Permalink Reply by Aaron M. Ryan on January 1, 2014 at 6:19pm

Cool!

thanks!

aaron

Permalink Reply by Nicholas Rawitscher on March 20, 2016 at 8:28pm

Hey Guys,

I am getting the same mistake, the only difference is that I imput GH created geometry only, I Know there are a lot of topics related to this in the forum, but I haven't had any luck on getting on the right track. I am trying to write a very simple script to extend a list of lines to a list of surfaces. Attached is my file

Thank you in advance!

Attachments: