On 16. Oct 2010, at 16:53, Martin Lambers 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? > 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. HTH, Stefan. _______________________________________________ eq-dev mailing list [email protected] http://www.equalizergraphics.com/cgi-bin/mailman/listinfo/eq-dev http://www.equalizergraphics.com
