[Interest] Qt3D

Igor Mironchik igor.mironchik at gmail.com
Sat Apr 8 16:03:26 CEST 2017


Sorry guys. It seems that it my fault...

08.04.2017 15:18, Igor Mironchik пишет:
> Hello guys,
> Did anybody do any 3D project with new Qt3D? Did you do the scene 
> dynamically? I.e. did you allocate new and new QEntity with parent? Do 
> you see every QEntity? Does Qt3D stable?
> A lot of questions.
> I've played a little with Qt3D, I'm trying to implement 3D tree which 
> starts with one vertical branch and 2 leafs. First leaf I see, the 
> second - doesn't. It created but doesn't seen.
> When I deleted leafs, i.e. winter came, they dissapear, it's ok. but 
> in spring I create new branches and leafs. They creates, but doesn't 
> seen on the scene.
> In autumn I change colors of QPhongMaterial and my leaf becomes 
> black... Is it a bug? Or I miss something.
> Why does the scene with ~20 QEntity eats so much CPU? 3 entities ~17%, 
> 13 - ~ 40%, > 20 - ~75%, etc...
> I'm new at Qt3D, so maybe it's my bugs, missunderstanding of 
> something, that is why I'm asking.
> The first approximation is located here: 
> https://github.com/igormironchik/3Dtree
> If you wnat you can look at it. I know that I have bug with placing a 
> leaf (and probably child branches)...

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