observe from inside of object

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Lucien
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Joined: Wed Jun 08, 2016 7:51 am

observe from inside of object

Postby Lucien » Mon Jul 18, 2016 8:56 am

Is it possible in CloudCompare to put the point of view in side of a closed object to observe it from inside?

daniel
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Re: observe from inside of object

Postby daniel » Mon Jul 18, 2016 9:08 am

Yes, but you have to switch to perspective mode. Then either you modify the viewport with the mouse (or better the 3D mouse) or you set the right position with the Camera parameters dialog.
Daniel, CloudCompare admin

Lucien
Posts: 37
Joined: Wed Jun 08, 2016 7:51 am

Re: observe from inside of object

Postby Lucien » Mon Aug 08, 2016 8:44 am

I picked a point from inside(perspective mode and camera center inside).

But when I zoomed out, I found that the picked point was in fact a outside point
Capture.JPG
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Attachments
Capture01.JPG
Capture01.JPG (84.09 KiB) Viewed 1328 times

daniel
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Joined: Wed Oct 13, 2010 7:34 am
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Re: observe from inside of object

Postby daniel » Mon Aug 08, 2016 5:05 pm

Are you still using an old version or is it with the 2.8.beta (trunk) version?

There was several glitches that were fixed recently.

Another test (if you did test with the latest version): you can tell CC to perform the picking with OpenGL (see the main options). In this case, does it change the behavior?
Daniel, CloudCompare admin

Lucien
Posts: 37
Joined: Wed Jun 08, 2016 7:51 am

Re: observe from inside of object

Postby Lucien » Wed Aug 10, 2016 12:52 pm

I didn't find the OpenGL option in v2.8beta
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daniel
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Re: observe from inside of object

Postby daniel » Wed Aug 10, 2016 5:02 pm

It's the 'never' option of 'auto compute octree for picking'. You can either use the octree (in which case CC performs the picking procedure) otherwise the GPU driver is used.

Can you compare both modes?
Daniel, CloudCompare admin

Lucien
Posts: 37
Joined: Wed Jun 08, 2016 7:51 am

Re: observe from inside of object

Postby Lucien » Thu Aug 11, 2016 6:51 am

Capture.JPG
Capture.JPG (89.21 KiB) Viewed 1312 times

Capture01.JPG
Capture01.JPG (30.69 KiB) Viewed 1312 times

There is apparently no difference in OpenGL mode. I picked a point from inside but it's in fact the closest point of outside.

daniel
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Posts: 3513
Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: observe from inside of object

Postby daniel » Fri Aug 12, 2016 8:35 pm

But where you actually using the octree/cpu mode before? (as the 'never' option was already selected on your snapshot).

And if both versions (CC or the GPU driver) give the same result, I'm not sure what to think...
Daniel, CloudCompare admin


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