Problem: Surface of revolution analyisis plugin

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jperos
Posts: 3
Joined: Wed Sep 06, 2017 7:19 am

Problem: Surface of revolution analyisis plugin

Postby jperos » Wed Sep 06, 2017 7:34 am

Hi,

First of all thank you for your great software, it is proven invaluable for me :)

The bug that bothers me is in the Surface of revolution analysis plug-in.
When I try to compare a point cloud and a primitive cylinder the plug-in only compares the top half of the point cloud and creates the 2d deformation map for it. I tried using real world point cloud data to compare with a cylinder, also I tried using a cylinder exported from 3ds Max and the results are the same.

CC_RA_example.PNG
CC_RA_example.PNG (127.7 KiB) Viewed 171 times


The attached picture is an example of the results I am getting, the bright coloured part of the point cloud is the only part that is compared to the cylinder with the plug-in.

The test were done using versions 2.9 and 2.8.1 and the result are the same.

Thanks in advance.

With regards,
JP

daniel
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Location: Grenoble, France
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Re: Problem: Surface of revolution analyisis plugin

Postby daniel » Thu Sep 07, 2017 8:12 am

Can you provide me with your test data? (cloudcompare [at] danielgm.net).
Daniel, CloudCompare admin

daniel
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Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
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Re: Problem: Surface of revolution analyisis plugin

Postby daniel » Mon Sep 11, 2017 8:29 pm

Okay, I fixed the bug. You can download the latest 2.9 beta release online.
Daniel, CloudCompare admin

jperos
Posts: 3
Joined: Wed Sep 06, 2017 7:19 am

Re: Problem: Surface of revolution analyisis plugin

Postby jperos » Fri Sep 29, 2017 7:57 am

Once again thank you for the quick fix.

Is there a reason why the Surface of revolution analysis plug-in doesn't use absolute heights but instead the lower half of the tank has negative heights an the upper part positive. Is it possible to make an adjustment so that the bottom has the height of zero ( or the height from the point cloud ) and positive heights to the top.
The problem is visible on the attached image.

Thank in advance.
Attachments
CC_RA_example_height.PNG
CC_RA_example_height.PNG (96.25 KiB) Viewed 101 times

daniel
Site Admin
Posts: 3238
Joined: Wed Oct 13, 2010 7:34 am
Location: Grenoble, France
Contact:

Re: Problem: Surface of revolution analyisis plugin

Postby daniel » Fri Sep 29, 2017 8:55 am

Oh, it's because cylinders are centered on 0 by default in CC. I'll see what can be done.
Daniel, CloudCompare admin

jperos
Posts: 3
Joined: Wed Sep 06, 2017 7:19 am

Re: Problem: Surface of revolution analyisis plugin

Postby jperos » Wed Oct 11, 2017 8:39 am

Found the solution.
When you generate the 2D distance map (Surface of Revolution) in the Generatrix tab the Z value has to be 0, then the heights in the map will be apsolute.
Attachments
CC_RA_example_height_SOLUTION.PNG
CC_RA_example_height_SOLUTION.PNG (12.78 KiB) Viewed 45 times


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