Hi Jamie, Why not:
a. texture a large plane with a circular alpha channel hole b. model a large plane with a circular hole. Both would be a mask that show through what is rendered behind them, should be very fast, but not as flexible, as your ideas. .b. Jaime Oliver wrote: > Hello all, I am trying to do something which should be fairly easy: I am > trying to see a circle that let's through an image that is behind it. > (As if through a telescope...) So my attempt so far consists of > texturing this image into a circle and compensate changes in translation > and size of the circle with the pix_coordinate object. I have managed to > do this with rectangles and triangles, but can't a find a way around > circles. The main idea is the next: > > pix_image > | > pix_texture coordinate-mess > | / > pix_coordinate > | > rotateXYZ > | > translateXYZ > | > circle > > The coordinate message has this behaviour: > -the 1st two floats don't have any effect. > -the 3rd one compresses/expands left-right, > -the 4th one compresses/expands up-down, > -the 5th doesn't do anything, > -the 6th one seems to offest the vertical compression/expanssion > -any succesive floats have no effect. > > So my problem is that without any horixontal offest i can't compensate > for size/transaltion values. If i had that i think i could do some math > to do this.... > > Anyone has any suggestions? Is this the wrong approach?? > > I am attaching the patch if anyone want's to test this and I am also > attaching an example of how i am compensating this for a polygon 3 > > best, > > J > > > -- > Jaime E Oliver LR > > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > www.realidadvisual.org/jaimeoliver > <http://www.realidadvisual.org/jaimeoliver> > www-crca.ucsd.edu/ <http://www-crca.ucsd.edu/> > www.realidadvisual.org <http://www.realidadvisual.org> > > 9168 Regents Rd. Apt. G > La Jolla, CA 92037 > USA > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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