The ARGoS Forum

Hi,

Can I in ARGoS save automatically snapshots of the experiment (ex. on 1k, 2k and 3k simulation step)?
I am almost sure that I've read somewhere that it is possible, but I cannot find it now

Thank you for your help!

Hi Pawel,

You have a number of ways to do this. The two simplest ways are:

1. Turn on frame grabbing in the GUI, set the "draw frame every" parameter to what you need, and press fast-forward
2. Do it in the loop functions. In the PreStep() method, call the method CQTOpenGLWidget:: SetGrabFrame(bool) with true when you want to start saving frames, and with false when you want to stop. To get a reference to the visualization, you can do something like this:

   Code: Select all

   void CMyLoopFunctions()::PreStep() { CQTOpenGLRender& render = dynamic_cast<CQTOpenGLRender&>(GetSimulator().GetVisualization()); CQTOpenGLWidget& widget = render. GetMainWindow().GetOpenGLWidget(); if(/* must save frame */) widget.SetGrabFrame(true); else widget.SetGrabFrame(false); }

Cheers,
Carlo

I like this fist option

Additional question, if I may. Can I set orthogonal projection instead of perspective projection? It top-view I would like to have 2D-like image.

You can't in the current version of the code. You'd need to patch the Qt OpenGL widget to obtain this effect.