so to make this easy think of a square texture that has a picture the globe centered inside it. i want to take that picture and map the flat image of the globe onto a hemisphere so that you see [in this virtual world] 1/2 of a globe, warped so that, in the virtual world, it looks correct.
-Alex On 10/15/07, marius schebella <[EMAIL PROTECTED]> wrote: > Hi alex, > I am not sure what you're trying to do, but I am eager to help you... > do you want to project the video onto a wall/ceiling hemisphere inside a > real room? or are you talking about virtual projections? > I guess what you have to do first is distort the circled video back into > a square and then use that to texture the sphere. > marius. > > > sphere with a ? is it just the mapping on the spherefor any distortion you > > Alex wrote: > > Maybe a different subject will inspire some help? > > > > basically, I have video that was shot on a mirrored spherical ball.. > > this gives a circular image inside a rectangular video, I've figured > > out how to crop it so that I just get the square that surrounds the > > circle, but I cannot figure out how to correctly map this texture onto > > a sphere so that it is only on one hemisphere and so that the circle's > > circumference is on a "great circle" of the sphere? [ie it the circle > > is warped out so that it becomes a hemisphere]. > > > > I figure maybe I have to do some GEMgl stuff for this? > > > > if anyone has done this, would you please share? > > > > If not, any advice? > > > > Thanks, > > -Alex > > > > > > On 10/10/07, Alex <[EMAIL PROTECTED]> wrote: > >> I have some panoramic video that I want to use to texture a hemisphere > >> [or rather, the bottom half of a sphere]. > >> > >> I cannot simply texture the sphere with the video because the warping > >> is not correct.. it seems that I need some sort of non-rectangular > >> warping of the image before I texture the object, or a non-rectangular > >> mapping of the texture onto the sphere. > >> > >> Any ideas or advice? Does anyone else have experience working with > >> panoramic video in Gem? > >> > >> -Alex > >> > > > > _______________________________________________ > > PD-list@iem.at mailing list > > UNSUBSCRIBE and account-management -> > > http://lists.puredata.info/listinfo/pd-list > > > > _______________________________________________ PD-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list