Extract x,y,z coordinates of surfaces in Rhino

Replies to This Discussion

Permalink Reply by Danny Boyes on June 13, 2014 at 2:34am

Using [Closest Point] you can get rid of all the ones that have a distance greater than 0. YOu then need to order them along the referenced curve to get your Nodes.

See next reply for File

Permalink Reply by Danny Boyes on June 13, 2014 at 2:37am

Error when uploading... try again

Attachments:

• AnsysMacro.gh, 175 KB

Permalink Reply by Danny Boyes on June 13, 2014 at 1:52pm

The components are already there just delete the [Join Text] and then rearrange as below

Panel[7] = D,

Panel[8] = UX,UY,UZ,ROTX,ROTY,ROTZ

Panel[7] --> (A) Concatenate[4]

Find Similar Member[2] (¡) --> (B) Concatenate[4]

Find Similar Member[2] (i): Graft = True

Concatenate[4] --> (A) Concatenate[5]

Panel[8] --> (B) Concatenate[5]

Concatenate[5] --> # this is you answer

Permalink Reply by Danny Boyes on June 13, 2014 at 2:47pm

You have to appreciate i did that solely from memory. What ever works

Permalink Reply by Peter Ayad on June 10, 2014 at 2:59pm

i was trying to export the points to CSV file regardless of the input data, but you are right; the script needs some tweaking to remove duplicates ... maybe the loop should check the existing points before adding a new point ID .. or something like that

Permalink Reply by Peter Ayad on June 10, 2014 at 4:03pm

i solved the duplicates issue .. and i also commented on functions so you can easily tweak the code yourself

import rhinoscriptsyntax as rs
import ghpythonlib.components as ghcomp

f = open("C:\ghExport.csv","wr") #file path change it if you want
f.write('SurfaceID,NodeID,x-value,y-value,z-value\n') #setting columns titles

#function to write a new row in CSV file
#the string is divided just to be easier to read
def writeNewRow(parentId,id,pt):
    s = str(parentId)+',' #SurfaceID column
    s = s + str(id)+',' #NodeID column
    s = s + str(pt[0])+',' #x-value column
    s = s + str(pt[1])+',' #y-value column
    s = s + str(pt[2])+'\n' #z-value column
    f.write(s)

#setting the point id list without dublicates
ptList = []
for srf in srfList:
    pts = rs.SurfacePoints(srf)
    for pt in pts: ptList.append( pt )
ptList = ghcomp.CullDuplicates(ptList).points

#setting the surface id list
if srfList:
    for i,srf in enumerate(srfList):
        points = rs.SurfacePoints(srf)
        for pt in points:
            for j in range(len(ptList)):
                if rs.PointCompare(pt,ptList[j]): # retrieving node ID
                    writeNewRow(i,j,pt)
                    break

f.close()

best of luck,

Attachments:

• to CSV no dublicates.gh, 3 KB

Permalink Reply by Peter Ayad on June 11, 2014 at 4:54am

i understood the problem, i tried to create a 3-points surface in rhino and its editpoints were still 4. So i figured why not working with mesh instead ... and it worked .. but of course you have to change the command inside the script instead of using the rs.SurfacePoints(srf) we will be using rs.MeshVertices(srf)

Attachments:

• to CSV no dublicates - mesh.gh, 5 KB

Permalink Reply by Peter Ayad on June 11, 2014 at 6:59am

when the surface is converted to mesh, it had more than one face; that's why it has more than 3 vertices. so i tried to reduce it in rhino using (_ReduceMesh) command and it works but i couldn't access the same command in python or grasshopper. so i couldn't solve it.

i recommend you to start a new discussion with this specific issue.

Permalink Reply by Peter Ayad on June 10, 2014 at 3:04pm

you have to manually create a new file in <C> partition and call it ghexport.csv before the first launch .. after that the code can modify the file ... or you can simply change the path of the file inside python .. both will work

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