-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Not that it really matters, but three points can define a plane and it's normal based on the order in which they are listed.
For example, declare that you always list the points in a clockwise direction (based on the desired plane normal). Then you can take the same set of points, list them in a different order, and provide for either normal direction. On 4/19/2012 2:08 PM, Ian McMahon wrote: > Yep, you're right... you need a plane normal to be able to put a > value on "clockwise" :) > > > On Apr 19, 2012, at 2:57 PM, Chris Radek wrote: > >> On Thu, Apr 19, 2012 at 09:45:42PM +0300, Viesturs L??cis wrote: >>> >>> Uhhh, You are right, halfcircles. All three points are on a >>> straight line, around which the arc can freely rotate. I guess >>> that this is special case (is there any other?), >> >> That is just the worst problem. Your system doesn't uniquely >> identify any arc. For every start, center, end points there are >> a pair of arcs that share the points. This is why we have G2/G3. >> If you don't have a normal vector you can't say which way is >> clockwise, so G2/G3 don't make sense. >> >> This is also a problem you get when you specify the arbitrary >> plane with three points, as was proposed by Ian M. >> >> The correct solution is probably to specify the plane's normal >> vector. >> >> While it's entirely possible to do, I doubt anyone would ever use >> this feature if someone did the work to implement it. >> >> Chris >> >> ------------------------------------------------------------------------------ >> >> For Developers, A Lot Can Happen In A Second. >> Boundary is the first to Know...and Tell You. Monitor Your >> Applications in Ultra-Fine Resolution. Try it FREE! >> http://p.sf.net/sfu/Boundary-d2dvs2 >> _______________________________________________ Emc-users mailing >> list Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > > For Developers, A Lot Can Happen In A Second. > Boundary is the first to Know...and Tell You. Monitor Your > Applications in Ultra-Fine Resolution. Try it FREE! > http://p.sf.net/sfu/Boundary-d2dvs2 > _______________________________________________ Emc-users mailing > list Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users - -- Charles Steinkuehler char...@steinkuehler.net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk+RZ/sACgkQLywbqEHdNFzVFACdG2DgE8JHjU0S2qe8g56pu7+S y+QAnjJa73lfevSnxB6n1yyj+QMmceFD =nncz -----END PGP SIGNATURE----- ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
