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[cgal-discuss] Alpha value in Polyhedron demo


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  • From: David Rochera <>
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  • Subject: [cgal-discuss] Alpha value in Polyhedron demo
  • Date: Wed, 10 Mar 2021 11:04:35 +0100
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Hello everybody,

I found what seems to be a bug in the Polyhedron demo, maybe it is already known (I'm using a recent version of CGAL in MacOS). 

It is regarding the "alpha value" of a surface mesh. It only works properly for the full opacity, for any other value, the original figure loses its opacity and a duplicated figure (with the correct opacity) is generated at some other place but scaled by some factor (see the attached figure as an example). Moreover, the edges of this second figure disappear while rotating the scene holding any button of the mouse.

Thank you very much and best regards,

David

Attachment: alpha-value-polyhedron.png
Description: PNG image




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