CloudCompare forum

Hi,

I manually segmented some trees and want to use to cross section tool to generate some envelopes as its described in the wiki here: https://www.cloudcompare.org/doc/wiki/i ... ss_Section. My goal is to get convex hulls.
What I understood is that the concave hull algorithm starts as a convex hull and then starts splitting. When i hover over the 'max edge length' parameter field, a small tool tips pops up which is saying that when the value is 0, a convex hull is generated. In the wiki this is not explicitly stated.
When I run the tool with the value 0, concave hulls a generated, which makes sense for the value 0 if it were not special.

So my questions is, whether the generation of the concave hull is intended or whether the convex hull should be generated. For my case i simply use a high enough value for the 'max edge length' parameter as a workaround, but since the algorithm starts at a convex hull, it would be nice to be able to simply use that starting hull. I added a screenshot for your understanding.

Thank you very much for your software! :)

So you mean that you don't get the convex hull when using 0 as parameter? You get instead the result in your screenshot? That's definitely not intended.

Just in case, have you tried with the latest 2.14.beta version?

Hi,

Thank you for your response

Yeah exactly. When I'm using 0 as a parameter, I get the concave hull instead of the convex hull.
I just tested it with 2.14 beta version and the same problems still occurs.

Here is a fixed version: https://www.cloudcompare.org/release/Cl ... up_x64.exe

(sadly, it's a non-signed version as I have some issues with my certificate - you'll have to convince Windows that it's safe to run)