Re: [PD] GEM- simple img texturing into a circle
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...) Why not render the picture on a square/rectangle, and put a 'hole' in front of it (for instance a cylinder: make it very wide, thick, and short. rotate 90 degrees so we are looking 'throught' it). moving the picture your 'hole' in coordinated fashion back and forth could create a telescope like effect, no? ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] GEM- simple img texturing into a circle
[disk] will give you this kind of bagel shape. Am 25.03.2008 um 16:49 schrieb Oded Ben-Tal: 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...) Why not render the picture on a square/rectangle, and put a 'hole' in front of it (for instance a cylinder: make it very wide, thick, and short. rotate 90 degrees so we are looking 'throught' it). moving the picture your 'hole' in coordinated fashion back and forth could create a telescope like effect, no? ___ 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
Re: [PD] GEM- simple img texturing into a circle
On Tue, Mar 25, 2008 at 4:51 AM, Max Neupert [EMAIL PROTECTED] wrote: [disk] will give you this kind of bagel shape. [torus] makes a pretty good bagel too. ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] GEM- simple img texturing into a circle
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] www.realidadvisual.org/jaimeoliver www-crca.ucsd.edu/ www.realidadvisual.org 9168 Regents Rd. Apt. G La Jolla, CA 92037 USA texturing test.pd Description: Binary data texturingtests_p3.pd Description: Binary data ___ PD-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] GEM- simple img texturing into a circle
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
Re: [PD] GEM- simple img texturing into a circle
Hi Ben Why not: a. texture a large plane with a circular alpha channel hole b. model a large plane with a circular hole. I'll give that a try, I think i'll need some more flexibility since i need to have other polygons in the same patch... but maybe i can solve it in a different way... Both would be a mask that show through what is rendered behind them, should be very fast, but not as flexible, as your ideas. Being fast is definitely going to be a requirement. Now, in this context, is flexibility a synonym for madness? or more precisely, is this approach too slow? best, J .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 -- Jaime E Oliver LR [EMAIL PROTECTED] www.realidadvisual.org/jaimeoliver www-crca.ucsd.edu/ 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
