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Length cm, m

Posted: Tue May 15, 2018 9:49 pm
by Der_Zerspahner
Hello,

How can I specify the length of a line or plane in cm or m?

Re: Length cm, m

Posted: Wed May 16, 2018 12:59 am
by daniel
In CloudCompare, units are 'implicit'. Therefore, if you decide that 1 is 'meter' for instance, then 0.01 is 'cm', etc. This is due to the fact that almost not point cloud or mesh formats save the information about units...

And of course if you are doing this with an existing cloud or mesh, then you'll need to keep the same 'convention'.

Re: Length cm, m

Posted: Wed May 16, 2018 8:51 pm
by Der_Zerspahner
Thank you. So Is there a possibility to change the size of the object afterwards?

Re: Length cm, m

Posted: Wed May 16, 2018 9:57 pm
by daniel
Yes you can use the 'Edit > Multiply / scale' tool.

Re: Length cm, m

Posted: Thu May 17, 2018 8:21 pm
by Der_Zerspahner
Thank you for the quick reply, you help me a lot. One more question. Is it possible to set your own point clouds without uploading a Point cloud file. I want do digitalize a Picture with Points. So can i upload only the Picture in cloudcompare and add than the Points by hand?

Re: Length cm, m

Posted: Sun May 20, 2018 4:41 pm
by daniel
Of course. Simply create a ccPointCloud instance, then reserve some memory (with 'ccPointCloud::reserve'), and eventually fill it with points (addPoint), colors, etc.

If it's done in a plugin, you have to add this point cloud to the main DB (with 'm_app->addToDB()').