Hello Stefan! On 17/10/10 15:56, Stefan Eilemann wrote: >> To keep things simple, I plan to use a single 2D canvas in the Equalizer >> configuration for video - anything else would not make much sense. Now I >> need information about this canvas in two places: >> >> 1. The config needs to know the geometry of the whole canvas, so that it >> can decide which part of the canvas to use to keep the aspect ratio of >> the video. > > Can you use the canvas wall to get the width & height?
Yes, but how do I get it? I can get the canvas with getCanvases()[0]. But how do I get the wall of the canvas? >> 2. The channels needs to know its relative viewport inside the canvas so >> that it can display the correct subset of the video. > > Either use Channel::getFrustum or Channel::getViewport. > > I would probably just place the video on a screen-aligned and screen-centered > quad at depth 1.0, with a configurable size. i.e. of height 1.0 and width = > f( height, aspect ratio). This approach requires you to change nothing in the > GL path. > > The viewport is the fractional viewport wrt the destination view. I guess I was looking for Channel::getViewport, but I'm a little confused what 'destination view' means. How is this related to the segment defined in the configuration file? Is this the same? Martin -- Computer Graphics and Multimedia Systems Group University of Siegen, Germany http://www.cg.informatik.uni-siegen.de/ _______________________________________________ eq-dev mailing list [email protected] http://www.equalizergraphics.com/cgi-bin/mailman/listinfo/eq-dev http://www.equalizergraphics.com
