Trying to figure out how to read in a list of points, modify some of the points and then output points in original order. Reading points in to point cloud modifying all of the points and outputting point cloud keeps point order. Reading in points not into a point cloud, modifying and outputting points loses original point order. Any suggestions on how to do this?
Hi Dwight,
Please post an example of the input you are looking to modify. Thanks
Here is a simple point txt file. I want to read it in and move 4 points and output the file with the points in the same order they were read in.
sphere points.txt (9.5 KB)
This example is a sphere with 185 points I want to move 6 and output all the points in the original order. The excerpt from txt files shows that the original order is lost …
| original point txt file | modified txt file | |||||
|---|---|---|---|---|---|---|
| 1675.242625 | 16.3843611 | -23.82208293 | 1650.607025 | 3.0674119 | 7.361428261 | |
| 1682.604054 | 16.3843611 | -22.6561472 | 1646.279999 | 16.38436127 | 7.361428261 | |
| 1681.198146 | 20.71130019 | -22.6561472 | 1650.607025 | 29.70131111 | 7.361428261 | |
| 1677.517432 | 23.38549561 | -22.6561472 | 1649.663788 | 2.382091999 | 0 | |
| 1672.967819 | 23.38549561 | -22.6561472 | 1645.114105 | 16.38436127 | 0 | |
| 1669.287104 | 20.71130019 | -22.6561472 | 1649.663788 | 30.38663101 | 0 | |
| 1667.881197 | 16.3843611 | -22.6561472 | 1650.60699 | 3.067411903 | 7.361428466 | |
| 1669.287104 | 12.05742201 | -22.6561472 | 1646.280051 | 16.3843611 | 7.361428466 | |
| 1672.967819 | 9.38322659 | -22.6561472 | 1650.60699 | 29.7013103 | 7.361428466 | |
| 1677.517432 | 9.38322659 | -22.6561472 | 1649.663728 | 2.382092078 | 0 | |
| 1681.198146 | 12.05742201 | -22.6561472 | 1645.114115 | 16.3843611 | 0 | |
| 1689.244894 | 16.3843611 | -19.27246993 | 1649.663728 | 30.38663013 | 0 | |
| 1686.570699 | 24.61468833 | -19.27246993 | 1675.242676 | 16.38436127 | 23.82208252 | |
| … |
There are a number of ways to do this, here we bake the points to Rhino and move them about, then save to new file.
note that it appears each point has a duplicate.
To ensure that you are moving the correct one we could put the Index as its Object Name or as a User Text during the bake process
sphere points.txt (9.5 KB)
added the order to the name for proper selection
OutputPointInOrder-v2.gh (12.3 KB)
double checking the output order
You could also do this in Excel 
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I was hoping there was something easy in rhino I could do to maintain order versus sorting in excel or programing, typical use involves 20000 points.
I am sorry to say I am completely grasshopper illiterate; can you give me a few clues to get the “program” to work
Google Sheets too…
in Rhino you can start a new file, open grasshopper via the command Grasshopper or by a button, then open the file above. Once open right click on File Path and set it to your file. Mash the Push Content button to get the points in Grasshopper. Right click the last panel (labeled) to set the .txt output & enjoy.
That would require a quick rebuild with a 3rd party plugin. Is this a workflow you are interested in?
Thank you very much! I loaded workflow into rhino 8 and it displays the points to rhino after I point at the right file and do a push, I move some of the points in rhino and somehow do a pull in grasshopper and stream points to my destination. Does just what I want, i’m a little fuzzy on the pull commands but seem to be able to get it to work.
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