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From: R. R. <ren...@ba...> - 2008-08-15 09:28:54
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On Fri August 15 2008 09:10, R. Reucher wrote: > I vote for 2D sprites! It should be fine to have "snow ball" like marble > sprites for ~180 degrees (assuming that the marbles/textures/bump-maps use > rotational symmetry, which would even avoid the problem with the rotation > angle!). A "frame skip" of 5 should be sufficient, meaning to require at > least 36 sprite images per marble. If we do all textures / bump-maps the > same and just use different colors, it would be sufficient to have those 36 > images in white; I could create the rest on-the-fly in a precalculation > step -- colorization, plus pseudo dynamic lightning / reflections / other > effects. It should be possible to run smoothly this way, even on systems > with a slower graphics subsystem. Thinking about it again, it should even be sufficient to render less than that... because if we use a rotational symmetric texture / bump map, a set of images for 90 degrees / a quarter of a full rotation should be enough, too. But we should perhaps narrow the angle skip to 2 degrees, which means that we would need 45 images of the marble sprite to animate the rotation. And... depending on the kind of texture / bump map, this could also be narrowed down to 45 degrees with a 1 degree "angle skip" (also 45 images). This should really be enough for a smooth animation of rotating "snow marbles" :)... Have fun, René -- René Reucher Tel: +49 160 7115802 FAX: +49 6359 205423 ren...@ba... http://www.batcom-it.net/ A truly wise man never plays leapfrog with a unicorn. |