RE: just not normal

2013-08-15 Thread Matt Lind
12:57 PM To: softimage@listproc.autodesk.com Subject: RE: just not normal Matt, maybe it was the same textbook? :) I forget the author but as I recall it was a grey hardback with pinkish/purplish printing on the front. "True vector" I obviously not a technical term, but I find it's us

Re: just not normal

2013-08-15 Thread Raffaele Fragapane
Yes, a linear algebra book will tell you what you need to know in the context of ICE to KNOW that. "Positions converted with 4x4 and locations with 3x3" is scarily incorrect and highly coincidental. I really, really do recommend some fundamentals of linear algebra if you're getting deeper into ICE

RE: just not normal

2013-08-15 Thread Grahame Fuller
y, August 15, 2013 2:31 PM To: softimage@listproc.autodesk.com Subject: Re: just not normal MIT Courseware Linear Agebra with videos http://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-spring-2010/ On Thu, Aug 15, 2013 at 1:51 PM, Matt Lind mailto:ml...@carbinestudios.com>> wrote:

RE: just not normal

2013-08-15 Thread Ponthieux, Joseph G. (LARC-E1A)[LITES]
Of Grahame Fuller Sent: Thursday, August 15, 2013 12:18 PM To: softimage@listproc.autodesk.com Subject: RE: just not normal Joey, ICE doesn't convert locations directly. It can display them as vectors for debugging purposes but under the hood they are really a triangle ID + baryce

Re: just not normal

2013-08-15 Thread Daniel Brassard
for CAD and CG co-written with Dianne Hansford. > > ** ** > > ** ** > > Matt > > ** ** > > ** ** > > ** ** > > ** ** > > ** ** > > ** ** > > *From:* softimage-boun...@listproc.autodesk.com [mailto: > softimage-boun...@listproc.autodesk.com] *On

RE: just not normal

2013-08-15 Thread Matt Lind
CG co-written with Dianne Hansford. Matt From: softimage-boun...@listproc.autodesk.com [mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Grahame Fuller Sent: Thursday, August 15, 2013 9:18 AM To: softimage@listproc.autodesk.com Subject: RE: just not normal Joey, ICE doesn

RE: just not normal

2013-08-15 Thread Grahame Fuller
n Behalf Of Matt Lind Sent: Wednesday, August 14, 2013 7:52 PM To: softimage@listproc.autodesk.com Subject: RE: just not normal It will differentiate how to handle orientation vectors differently from position vectors which is the solution to the problem you said you couldn't solve on your own. M

RE: just not normal

2013-08-13 Thread Grahame Fuller
ent: Tuesday, August 13, 2013 10:49 AM To: softimage@listproc.autodesk.com Subject: RE: just not normal I tried this already, but it didn't work. Rather, it works but not how I need it to work. So I've got two point positions, a vector is derived from these point positions. Be

RE: just not normal

2013-08-13 Thread Ponthieux, Joseph G. (LARC-E1A)[LITES]
Mailing List Subject: Re: just not normal Absolutely possible. What you're experiencing is that self.PointNormal (and I think maybe all or most preexisting iceattributes) are in the object's local space always. If you get a "Multiply vector by matrix" node and fe

Re: just not normal

2013-08-13 Thread Alan Fregtman
Absolutely possible. What you're experiencing is that self.PointNormal (and I think maybe all or most preexisting iceattributes) are in the object's local space always. If you get a "Multiply vector by matrix" node and feed it your self.PointNormal and a getdata of self.kine.global into the matri

just not normal

2013-08-13 Thread Ponthieux, Joseph G. (LARC-E1A)[LITES]
Howdy, I'm trying to get a vector which is the normal of a surface relative to world space, not local space. The object is moving. I managed to get the vector using both PointNormal and SurfaceGeometricNormal. Sometimes the calculations work and sometimes they don't. It appears when I display t