Hi Igor, I am facing the same problem. Have you found a solution to pick a surface by a mouse click using OpenGL in PyQtGraph ?
Greetings Sven Am Mittwoch, 7. September 2016 14:46:20 UTC+2 schrieb [email protected]: > > Hello Luke, > > > I am looking for a tool to visualize and manipulate tetrahedral mesh. I > have some experience with numpy, matplotlib but nothing with opengl. > With PyQtGraph you are doing a great job and pyqtgraph.examples helps to > easily understand the functionality. I have a question about > pyqtgraph.opengl.GLViewWidget.itemsAt. It takes the rectangular regions of > interest and gives back the list of items which are currently inside. But > how can I get the ID of a single face from the mesh item? > > > Let me shortly explain. I display tetrahedral mesh (vertices, faces) like > a single item using pyqtgraph.openg.GLMeshItem. And I want to click at a > single face and to get it’s ID in order to, let's say, change the face > color and modify a numpy array which is linked to the face by the ID. > > I tried to plot faces like a separate items but it works slow and itemsAt > returns all the faces which are in the region of interest, while I need > only the one which is closest to the user. > > > Could you please give me advice how can I effectively plot a huge mesh and > get access to a single face by mouse click? Maybe I have not managed to > explain properly. Please have a look at java script example > <http://threejs.org/examples/?q=active#webgl_interactive_cubes_gpu>which > almost does what I tried to in Python using PyQtGraph. > > > <http://threejs.org/examples/?q=active#webgl_interactive_cubes_gpu> > > Thank and best regards, > > Igor. > -- You received this message because you are subscribed to the Google Groups "pyqtgraph" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/pyqtgraph/5ea8be8a-a2f8-443e-8ec7-14e48f20a9cf%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
