Re: [PD] Find distance to a line in 3d space
Thanks. It will take me some days until I can have a look at it. In case you're interested in arrays, here is something I was working on in the last days: http://lists.puredata.info/pipermail/pd-list/2013-12/105216.html Hi João, I patched something for you, maybe it's useful. ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
Hi João, I patched something for you, maybe it's useful. 3dspacedistance.pd Description: Binary data http://mathsfirst.massey.ac.nz/Algebra/PythagorasTheorem/pythapp.htm Am 11.12.2013 um 02:30 schrieb João Pais jmmmp...@googlemail.com: Am 06.12.2013, 00:51 Uhr, schrieb Claude Heiland-Allen cla...@mathr.co.uk: On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. it looks interesting, and I also checked for more content with a similar title. the thing is, my math/geometry skills are too bad, and I don't understand where they get the formulas for the points and lines. I'll keep watching the links, but I might not get it in time for the purpose I was looking for. thanks anyway, João ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list signature.asc Description: Message signed with OpenPGP using GPGMail ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
Hi If you want to know the distance between a point and line in 3D space : 1 - you calculate the vector director (= vecteur directeur ?) u- of the line 2 - you select any point A from your line 3 - you calculate the vector AB- 4 - you calculate || (AB-) ^ (u-) || / || u- || , with || . || euclidian norm and ^ cross product the distance is d = || (AB-) ^ (u-) || / || u- || Prince 2013/12/26 Max abonneme...@revolwear.com Hi João, I patched something for you, maybe it's useful. http://mathsfirst.massey.ac.nz/Algebra/PythagorasTheorem/pythapp.htm Am 11.12.2013 um 02:30 schrieb João Pais jmmmp...@googlemail.com: Am 06.12.2013, 00:51 Uhr, schrieb Claude Heiland-Allen cla...@mathr.co.uk: On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. it looks interesting, and I also checked for more content with a similar title. the thing is, my math/geometry skills are too bad, and I don't understand where they get the formulas for the points and lines. I'll keep watching the links, but I might not get it in time for the purpose I was looking for. thanks anyway, João ___ 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 ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
Am 06.12.2013, 00:51 Uhr, schrieb Claude Heiland-Allen cla...@mathr.co.uk: On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. it looks interesting, and I also checked for more content with a similar title. the thing is, my math/geometry skills are too bad, and I don't understand where they get the formulas for the points and lines. I'll keep watching the links, but I might not get it in time for the purpose I was looking for. thanks anyway, João ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
check pdmtl abstractions too. they contain that and a lot more . check gems.* patches https://github.com/aalex/pdmtl 2013/12/6 tim vets timv...@gmail.com [list-dotprod] from list-abs might come in handy 2013/12/6 Claude Heiland-Allen cla...@mathr.co.uk On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. Claude As I see it, the process goes this way: - define a line from coordinates x1,y1,z1 to x2,y2,z2 - declare the point x3,y3,z3 - find the distance from that point to the nearest point belonging to the said line Any existing examples with gem rendering would be great. Thanks as usual, jmmmp -- http://mathr.co.uk ___ 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 ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
after checking the other posts , i only answered partially your question . 2013/12/6 Py Fave pyf...@gmail.com check pdmtl abstractions too. they contain that and a lot more . check gems.* patches https://github.com/aalex/pdmtl 2013/12/6 tim vets timv...@gmail.com [list-dotprod] from list-abs might come in handy 2013/12/6 Claude Heiland-Allen cla...@mathr.co.uk On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. Claude As I see it, the process goes this way: - define a line from coordinates x1,y1,z1 to x2,y2,z2 - declare the point x3,y3,z3 - find the distance from that point to the nearest point belonging to the said line Any existing examples with gem rendering would be great. Thanks as usual, jmmmp -- http://mathr.co.uk ___ 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 ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
[PD] Find distance to a line in 3d space
Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. As I see it, the process goes this way: - define a line from coordinates x1,y1,z1 to x2,y2,z2 - declare the point x3,y3,z3 - find the distance from that point to the nearest point belonging to the said line Any existing examples with gem rendering would be great. Thanks as usual, jmmmp ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. Claude As I see it, the process goes this way: - define a line from coordinates x1,y1,z1 to x2,y2,z2 - declare the point x3,y3,z3 - find the distance from that point to the nearest point belonging to the said line Any existing examples with gem rendering would be great. Thanks as usual, jmmmp -- http://mathr.co.uk ___ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management - http://lists.puredata.info/listinfo/pd-list
Re: [PD] Find distance to a line in 3d space
[list-dotprod] from list-abs might come in handy 2013/12/6 Claude Heiland-Allen cla...@mathr.co.uk On 05/12/13 23:40, João Pais wrote: Hello list, I had a doubt, will try to explain. I wanted to define a line in a 3d space through 2 points, and be able to find out the distance from another point to that line. Since I'm very bad at math, I wanted to know if anyone has done something similar, or knows how to get to it. http://paulbourke.net/geometry/pointlineplane/ first example on the page, you just need to clamp u to [0..1] if you want to make it work for a line segment instead of an infinite line. Claude As I see it, the process goes this way: - define a line from coordinates x1,y1,z1 to x2,y2,z2 - declare the point x3,y3,z3 - find the distance from that point to the nearest point belonging to the said line Any existing examples with gem rendering would be great. Thanks as usual, jmmmp -- http://mathr.co.uk ___ 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
