How to obtain and manipulate QMesh vertices, faces, something else?

Question

I got arbitrary solid QMesh on my screen using examples. It's great. But I can to do nothing with it. mesh->children().count = 0, mesh->primitiveCount=0, mesh->geometry()=0 and so on. How to obtain internal contents of QMesh? Can I change QMesh vertices (geometry) programmatically, on the fly? The "setSource()" does not seems sufficient for all occasions.

Can you provide some code samples so we can better see what you are trying to accomplish? — MichaelDotKnox, Jul 31 '16 at 13:41

UncleSal · Answer 1 · 2016-07-31T15:31:58.490

0

Qt3DCore::QEntity * meshEntity = new Qt3DCore::QEntity( rootEntity ); 
Qt3DRender::QMesh * mesh = new Qt3DRender::QMesh(); 

QUrl url; 
url.setScheme("file"); 
url.setPath("/tmp/trefoil.obj");
mesh->setSource( url ); 

// now i print some of properties. 
qDebug() << mesh->geometry() << ", children nodes=" << mesh->childrenNodes().count(); 
// ... children... primitiveCount... and so on. I see only empty values.

edited Jul 31 '16 at 15:31

answered Jul 31 '16 at 14:54

UncleSal

41
4

I wonder something similar to mesh->getVertices(), mesh->getBones(), getFacets()... and so on. Any form of geometrical descriptions of the body (solid) within the mesh. – UncleSal Jul 31 '16 at 14:59
I am looking for the same thing. Did you manage to do it please? – SteveTJS Mar 22 '17 at 11:04
Unfortunately no. Instead of that, I used the assimp library and QOpenGLWindow-based visualization. – UncleSal Mar 22 '17 at 15:21
OK :(. Thanks anyway! – SteveTJS Mar 22 '17 at 16:27

How to obtain and manipulate QMesh vertices, faces, something else?

1 Answers1