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From: Ruhollah Tavakoli <rohtav@gm...>  20081105 19:05:21

intersection is also easily possible by GTS, there is an example for it in lib as well "..\test\boolean" if u like to use GTS on windows, u have 2 solutions: 1. use cygwin shell and compile GTS on it, 2) use native compilers directly fortunately, GTS can be easily used under native win compilers without any probelm (MSVC 6 as well as MSVC 7, 8), a little modification is needed, also u need precompiled GLIB. i recommned to do not think about method M. Aftosmis described, it is very difficult to implement, in particular for novice peoples. if u just need volume of a manifold, you can compute its approximate volume very easily by using a uniform cartesian grid generator, i.e. generate uniform grid by input output flag and count input cells then multiply by cell volume. if you use very fine grid your volume will have good accurary, further boolean operation can be also applied by using such grid. for this look at my uniform cart generator code (works on win as well) and also its related paper. Google on "CartGen" RT On Wed, Nov 5, 2008 at 8:58 PM, Sara Mahdavi <saram@...> wrote: > Thanks….but I guess I still have to find the intersection. What I mean is > for example the volume between a sphere and a cube which have intersection. > > Michael, I saw the link and have read your paper. I am trying to implement > the algorithm myself but I prefer something downloadable. Unfortunately all > I find can only be used in Unix or Linux. Does anyone know anything that > works in Windows? > > >  > > *From:* Ruhollah Tavakoli [mailto:rohtav@...] > *Sent:* November0508 8:49 AM > *To:* general discussion about GTS > *Subject:* Re: [gtsgeneral] volume enclosed between two surfaces > > > > hi, > > > > > > > Can someone tell me how to calculate the volume enclosed between two > surfaces? > > > > ur question is ambigious, volume is meaningful for a closed manifold, so u > can do boolean operations on your surfacepatches to convert them into a > closed manifold > > > > btw, look at examples folder GTS lib, there r something interesting for u > > > > > > though method mentioned by Michael works well, but i think that it is not > the easiest way (sophisticated programming is needed, an approximate version > mentioned method is now available in gerris flow solver). > > > > If you have a closedorientable manifold, it's easy to compute its volume > by divergence theorem, e.g. (take Omega as spatial domain and Gamma as its > boundary) > > > > vol = \int 1 d \Omega = \int_\omega div(F) d \Omega > > > > where vector field, F = (x/3, y/3, z/3) > > > > using div theorem, > > > > \int_\Omega div(F) d Omega = \int_\Gamma F. n d \Gamma > > > > where n is surface unit normal. > > > > > > RT > > > > > > > > On Wed, Nov 5, 2008 at 7:10 PM, Michael J. Aftosmis < > maftosmis@...> wrote: > > Simplest way is to simply do the intersection of the polyhedra and > compute the volume. > > Michael > > http://people.nas.nasa.gov/~aftosmis/cart3d/ > > > > > Begin forwarded message: > > > ResentFrom: <maftosmis@...> > > From: "Sara Mahdavi" <saram@...> > > Date: November 4, 2008 3:16:09 PM PST > > To: <gtsgeneral@...> > > Subject: [gtsgeneral] volume enclosed between two surfaces > > ReplyTo: general discussion about GTS <gts > > general@...> > > > > Hi, > > > > I'm totally new to gts. Can someone tell me how to calculate the > > volume enclosed between two surfaces? > > > > Thanks > >  > >  > > This SF.Net email is sponsored by the Moblin Your Move Developer's > > challenge > > Build the coolest Linux based applications with Moblin SDK & win > > great prizes > > Grand prize is a trip for two to an Open Source event anywhere in > > the world > > http://moblincontest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > Gtsgeneral mailing list > > Gtsgeneral@... > > https://lists.sourceforge.net/lists/listinfo/gtsgeneral > >  > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblincontest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gtsgeneral mailing list > Gtsgeneral@... > https://lists.sourceforge.net/lists/listinfo/gtsgeneral > > > >  > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblincontest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gtsgeneral mailing list > Gtsgeneral@... > https://lists.sourceforge.net/lists/listinfo/gtsgeneral > > 
From: Sara Mahdavi <saram@ec...>  20081105 17:28:23

Thanks..but I guess I still have to find the intersection. What I mean is for example the volume between a sphere and a cube which have intersection. Michael, I saw the link and have read your paper. I am trying to implement the algorithm myself but I prefer something downloadable. Unfortunately all I find can only be used in Unix or Linux. Does anyone know anything that works in Windows? _____ From: Ruhollah Tavakoli [mailto:rohtav@...] Sent: November0508 8:49 AM To: general discussion about GTS Subject: Re: [gtsgeneral] volume enclosed between two surfaces hi, > Can someone tell me how to calculate the volume enclosed between two surfaces? ur question is ambigious, volume is meaningful for a closed manifold, so u can do boolean operations on your surfacepatches to convert them into a closed manifold btw, look at examples folder GTS lib, there r something interesting for u though method mentioned by Michael works well, but i think that it is not the easiest way (sophisticated programming is needed, an approximate version mentioned method is now available in gerris flow solver). If you have a closedorientable manifold, it's easy to compute its volume by divergence theorem, e.g. (take Omega as spatial domain and Gamma as its boundary) vol = \int 1 d \Omega = \int_\omega div(F) d \Omega where vector field, F = (x/3, y/3, z/3) using div theorem, \int_\Omega div(F) d Omega = \int_\Gamma F. n d \Gamma where n is surface unit normal. RT On Wed, Nov 5, 2008 at 7:10 PM, Michael J. Aftosmis <maftosmis@...> wrote: Simplest way is to simply do the intersection of the polyhedra and compute the volume. Michael http://people.nas.nasa.gov/~aftosmis/cart3d/ Begin forwarded message: > ResentFrom: <maftosmis@...> > From: "Sara Mahdavi" <saram@...> > Date: November 4, 2008 3:16:09 PM PST > To: <gtsgeneral@...> > Subject: [gtsgeneral] volume enclosed between two surfaces > ReplyTo: general discussion about GTS <gts > general@...> > > Hi, > > I'm totally new to gts. Can someone tell me how to calculate the > volume enclosed between two surfaces? > > Thanks >  >  > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win > great prizes > Grand prize is a trip for two to an Open Source event anywhere in > the world > http://moblincontest.org/redirect.php?banner_id=100 <http://moblincontest.org/redirect.php?banner_id=100&url=/>; &url=/ > _______________________________________________ > Gtsgeneral mailing list > Gtsgeneral@... > https://lists.sourceforge.net/lists/listinfo/gtsgeneral  This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblincontest.org/redirect.php?banner_id=100 <http://moblincontest.org/redirect.php?banner_id=100&url=/>; &url=/ _______________________________________________ Gtsgeneral mailing list Gtsgeneral@... https://lists.sourceforge.net/lists/listinfo/gtsgeneral 
From: Ruhollah Tavakoli <rohtav@gm...>  20081105 16:48:54

hi, > Can someone tell me how to calculate the volume enclosed between two surfaces? ur question is ambigious, volume is meaningful for a closed manifold, so u can do boolean operations on your surfacepatches to convert them into a closed manifold btw, look at examples folder GTS lib, there r something interesting for u though method mentioned by Michael works well, but i think that it is not the easiest way (sophisticated programming is needed, an approximate version mentioned method is now available in gerris flow solver). If you have a closedorientable manifold, it's easy to compute its volume by divergence theorem, e.g. (take Omega as spatial domain and Gamma as its boundary) vol = \int 1 d \Omega = \int_\omega div(F) d \Omega where vector field, F = (x/3, y/3, z/3) using div theorem, \int_\Omega div(F) d Omega = \int_\Gamma F. n d \Gamma where n is surface unit normal. RT On Wed, Nov 5, 2008 at 7:10 PM, Michael J. Aftosmis < maftosmis@...> wrote: > Simplest way is to simply do the intersection of the polyhedra and > compute the volume. > > Michael > > http://people.nas.nasa.gov/~aftosmis/cart3d/ > > > > > Begin forwarded message: > > > ResentFrom: <maftosmis@...> > > From: "Sara Mahdavi" <saram@...> > > Date: November 4, 2008 3:16:09 PM PST > > To: <gtsgeneral@...> > > Subject: [gtsgeneral] volume enclosed between two surfaces > > ReplyTo: general discussion about GTS <gts > > general@...> > > > > Hi, > > > > I'm totally new to gts. Can someone tell me how to calculate the > > volume enclosed between two surfaces? > > > > Thanks > >  > >  > > This SF.Net email is sponsored by the Moblin Your Move Developer's > > challenge > > Build the coolest Linux based applications with Moblin SDK & win > > great prizes > > Grand prize is a trip for two to an Open Source event anywhere in > > the world > > http://moblincontest.org/redirect.php?banner_id=100&url=/ > > _______________________________________________ > > Gtsgeneral mailing list > > Gtsgeneral@... > > https://lists.sourceforge.net/lists/listinfo/gtsgeneral > >  > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblincontest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gtsgeneral mailing list > Gtsgeneral@... > https://lists.sourceforge.net/lists/listinfo/gtsgeneral > 
From: Michael J. Aftosmis <maftosmis@ma...>  20081105 16:06:57

Simplest way is to simply do the intersection of the polyhedra and compute the volume. Michael http://people.nas.nasa.gov/~aftosmis/cart3d/ Begin forwarded message: > ResentFrom: <maftosmis@...> > From: "Sara Mahdavi" <saram@...> > Date: November 4, 2008 3:16:09 PM PST > To: <gtsgeneral@...> > Subject: [gtsgeneral] volume enclosed between two surfaces > ReplyTo: general discussion about GTS <gts > general@...> > > Hi, > > I'm totally new to gts. Can someone tell me how to calculate the > volume enclosed between two surfaces? > > Thanks >  >  > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win > great prizes > Grand prize is a trip for two to an Open Source event anywhere in > the world > http://moblincontest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Gtsgeneral mailing list > Gtsgeneral@... > https://lists.sourceforge.net/lists/listinfo/gtsgeneral 