yade-users team mailing list archive

[Václav Šmilauer <eu@xxxxxxxx>]

> > What's more, I also want to know how to zoom the view automatically 
> > by adding some codes in GLViewer.cpp file? For instance, I want my 
> > model always be shown in the same size as the view.
> Hi Tao, there is a functionality to save & load the 3d view 
> configuration (using the keys Alt-7,8,9 and 7,8,9 to save/load, and 
> Alt-S to save to file I think), and one can also handle that from 
> scripts. They key is to understand that the GL rendering happens in 2 
> places, one is qt.OpenGLRenderer, the other one is qt.GLViewer (which 
> you can retrive by calling qt.views()[0] IIRC). I will write you a 
> proper answer tomorrow, you can have a look in docs for now.
Hi Tao, sorry for late reply. I fixed the docs so that the python 
interface to the glviewer is properly documented now 
(https://www.yade-dem.org/sphinx/yade.qt.html ; note that the 
yade.qt._GLViewer is itself imported directly to yade.qt, so you never 
have to specify _GLViewer). You can save views with Alt+7,8,9 and load 
it by pressing 7,8,9 again (press "h" in the view to get some terse help 
on that); those 3 states are saved in scene and can be saved/loaded 
programatically via loadState(num)/saveState(num). The viewer object can 
be obtained either when you create it with v=qt.View(), or when already 
opened, with v=qt.views()[0].

Then use v.loadState(1), v.saveState(2) etc. Individual parameters can 
be also manipulated, see 
https://www.yade-dem.org/sphinx/yade.qt.html#yade.qt._GLViewer.GLViewer 
, also get some inspiration in scripts/test/beam-l3geom.py where the 
view is set "by hand".

The GLViewer determines how do you look the scene, whereas 
OpenGLRenderer determines what is actually drawn in the 3d space 
(whether you see particles, or interactions etc); for that, see 
https://www.yade-dem.org/sphinx/yade.wrapper.html#yade.wrapper.OpenGLRenderer, 
which is also accessible from the second tab of the Controller (In 
there, you also have access to all Gl1_* functors and their attributes). 
You can get the renderer (there is only one instance of it) from 
qt.Renderer() and then play with that.

Hope this help a bit.

Cheers, v.