How to identify point coordinates in a scene interactively?

ParaView Support
1

Aloha. I’m using PV 6.0.0 on OSX 15.6 with M2 Max.

I once think I found a way to do this but can’t find it again. I’m using a *.vti file on a voxelized scence and using the slice option under the Blend control.
I cannot figure out how to be able to click on a point and display the coordinates. I’ve tried numerous suggestions from bots with no avail. I need human help.

Mahalo. J.

2

There are several ways to do this.

  1. Create a “Point Source” and pick a point using the P or Ctrl+P (Cmd-P on macos) key. The point coordinates will be displayed in the property panel.
  2. Click on the “Hover Points On” button just above the render view (and beneath the “Layout #1” tab). When you hover over a point, it will pop up a tool-tip with the nearest mesh point on your input data. This will only show coordinates of the nearest mesh point (not points on the surface in between mesh points).
  3. Select points using the d or g keys in a render view (or the selection buttons as in #2 above). Then use a Spreadsheet view or the Find Data panel to show the selected points (which will include their coordinates). This will only show coordinates of the nearest mesh point (not points on the surface in between mesh points).
  4. Programmatically via python. (I don’t remember this off the top of my head, but it is possible).
3

Mahalo.

I think I cannot do that with a voxelized object. It has to be in point mode, not volume. Is that correct, please?

J.

4

My understanding of your description was that you were in slice mode or had used a cut filter to render a surface inside the volume. You should be able to use point selection in either of those cases. I do not believe volume rendering allows interactive hovering.

5

Right. That’s what I think I’ve found as well. Mahalo for the answer.

My setup was a little different, though. I had (have) a volume for which I operate the Slice option of the Blend parameter; not a Slice filter.

This enables interactive scrolling through the volume but not much else AFAIK. However, when you embed the sliced volume (little s) it in a point-based scene, it’s a pretty cool capability.

However, I haven’t figured out how to get the color maps to be the same.

J.