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
