Recently, Alex Tweedly wrote: > I want a nice, simple (?) visual effect: > > I have two images (which may be different sizes), and I want to swap > them over (such that each one stretches or shrinks to occupy the space > previously taken up by the other one). > > I thought this would be simple ... loop some number of times, adjusting > the "rect" of each image - then find a suitable "wait" value to slow it > down. > > In fact, it is unbearably slow - even for medium sized images (320*240 > swapping with a 320*480) each step is clearly visible. > For 2 images of 160*120 it's almost a smooth animation - I'm not sure if > it's just that they are smaller sizes, or if it's the fact that the > sizes remain the same. (all on medium laptop - Pentium P4 2.8G with > low-end ATI graphics) > > It does look OK on a top of the range Pentium laptop with ATI92xx > graphics (my wife needs high-end hardware to play Sims :-), but that's > not exactly typical hardware yet. > > Is there some other way I should be approaching this ?
Without seeing exactly what you're doing, I'll go out on a limb and guess that yes, the images are too large for Rev to really do this smoothly. If Rev had some kind of direct-to-screen option, this might be doable, but the images are probably a bit large for Rev to do natively. Three suggestions: 1) If possible, map the images down to 8 bit color, no transparency. The fewer calculations Rev has to do to render the image/s on the card, the faster the transition can be. 2) If possible, don't do a "real" scaling effect. Instead, create the in-between frames in advance and show those, for example, as icons of a button. But again, given the size of the image, the delay between image updates may still be too great, and of course, you probably want to do this on-the-fly with any given images. I just realized you mentioned Windows platform, so QT effects are probably out. But FWIW, I've seen the QT effects do blend/dissolve effects very quickly, though I'm pretty sure the advanced ones are limited to OSX. Sorry the above isn't much help. Regards, Scott Rossi Creative Director Tactile Media, Multimedia & Design ----- E: [EMAIL PROTECTED] W: http://www.tactilemedia.com _______________________________________________ use-revolution mailing list use-revolution@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-revolution