Question

I am trying to grab images using MIL library and I wanted to render the image to glCanvas window using OpenGL. However, the problem is my

    OnPaint( wxPaintEvent &event)

method is not running in a loop to show the pictures. I have put code in this method to grab images using MIL and set them as textures before displaying them. So, if wxPaintEvent is running itself in a loop, why don’t I see an image sequence, like a video? When I check with default texture without using MIL, its working. So, basically, I’m just setting the textures!

I’m not using interprocess and mutexes, could this be a problem? Or, do I need to be more careful about timing of this event?

Answer 1

Paint events are usually only issued if the window has been marked as “invalid” or “dirty”, and is deemed to require a redraw. If you want to play an animation, either mark the window as subject your redraw yourself ( wxWindow::Refresh ). Or, the preferred method, register an idle event handler and perform OpenGL operations from there: http://wiki.wxwidgets.org/Making_a_render_loop