Hi, I am animating three different panels on a single window: a sound signal, the FFT, and a sonogram. So I need three redraw(). The result looks jerky as I start to increase the frame rate. If I disable the redraw on the signal and the FFT panels, then the sonogram display looks smooth even when I increase the frame rate.
I believe that doing three redraw() induces thee swaps of the OpenGL Buffer and this is too much traffic. I use a NVIDIA-8600 based card and the latest driver from NVIDIA. Is there a way to combine the three updates with a single swap of the video buffer while still using the OpenGL framework provided by Fltk? A typical behavior when I allow the three redraw() to occur is that starting from a frame rate of 20 Hz (I do 3 FFTs per frame each one drawn on its own pixel column) and increase to 60Hz, the display is at first smooth and swift, but after a second or so it begins to become jerky. Now I remove two redraw(), then the animation is smooth. I would like to animate all three panels though. I am using Fltk-1.1 latest edition and working on Linux. My PC is a quad core and it show at most 2% use so the processor is far from being overloaded. _______________________________________________ fltk-opengl mailing list fltk-opengl@easysw.com http://lists.easysw.com/mailman/listinfo/fltk-opengl
