I have imported a point cloud. Inside my point cloud node, I have made a selection (a subset of the points in the cloud). I would like to translate these selected points by a given amount.

Can anyone suggest how I might do this? I connected the point cloud output to a transform node, but the transform considers the whole cloud.

If you make your selection into a group, you can tell the transform node to only transform that group.

You can make a group by selecting the points in the viewport, then while still hovering your mouse over the viewport press tab and select group from the menu.

Try to group the selected points, and then specify the name of the new group in the transform nodes group field.

-b

EDIT: didn't see mart1jn's reply

or maybe this can help
https://www.sidefx.com/index.php?option=com_content&task=view&id=3071&Itemid=404 [sidefx.com]

Mart1jn, bonsak, thank you. That worked.

Tamte, the tutorial is useful. I must have missed it since it doesn't explicitly deal with point clouds. The technique is the same, though. Thanks

I have a followup question. How do I then manipulate the selected points in a vex node?

I have created a group from my selected points, and input that to a vex node. For testing the vex node simply translates the points obtained from the global variables ‘P’ variable.

This configuration not only translates the selected points, but also the non-selected points. Can anyone tell me what is wrong, and why my vex node is applying it's change to all data instead of only the selected points?

The VEX node also has a group field. Enter the name of your new group there and the VEX node will only operate on the points in that group. Another way would be to use an if statement in the VEX node to test if the incoming point is a member of the group or not. Group membership is just an attribute set to either 0 or 1. Take a look in your geometry spreadsheet.

-b