On 23 Apr 2013, at 07:22, Renk Thorsten <thorsten.i.r...@jyu.fi> wrote: >> Stuart, is it possible to pass somehow the info what trees are deciduous? >> I've done some testing, and I can selectively pick 'green' hue in the shader >> and color-rotate these pixels to autumn colors, but this is not sensitive >> enough to key on the difference between leaf and needle - if we had that, we >> could have autumn colors in addition.
Yes. If we put the deciduous trees at the beginning of the texture strip I can pass through information on the fraction of trees that are deciduous as a uniform and you can compare the x texture coordinate against that. At most a couple of lines of c code. > >> Then "fall" and "windy" could be combined with particles (?) to simulate >> wind blown leaves and dynamically painting the foliage part of the >> texture with alpha to make leaves fall off on windy weather..? ;) Kinda >> special case and maybe not worth the effort but might be quite awesome >> jaw-dropper on the right moment.. ;-) > > Yes, let's forget about spending all the framerate for flight and do > realistic vegetation - trees and grass should also move in the wind :-) (I > like the idea in principle because it's just mad enough to be charming...) Actually, I had this working very nicely a couple of months ago - using a sine function on time multiplied by wind factor to shift the top texture coordinates so the top of the trees move. I even had a nice larger scale effect to produce the sort of wave affect you see across the tree tops However to be visible at normal ranges (500m+) the wind had to be absolutely howling and shifting the tree tops many meters, so it really didn't seem worth the minor computational cost. -Stuart > > * Thorsten > ------------------------------------------------------------------------------ > Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring service > that delivers powerful full stack analytics. Optimize and monitor your > browser, app, & servers with just a few lines of code. Try New Relic > and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr > _______________________________________________ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
