Did you try Curve - Fit on Curve?
On Tue, Jun 18, 2013 at 4:08 PM, Ponthieux, Joseph G. (LARC-E1A)[LITES]
j.ponthi...@nasa.gov wrote:
Its been so long since I’ve tried this in Soft I can’t remember…
** **
Is there any logic or formula that will allow you to replicate a Bezier
Knot
Sares
Sent: Wednesday, June 19, 2013 3:28 AM
To: softimage@listproc.autodesk.com
Subject: Re: bezier - nurbs
Hi,
to clear the fog a bit more (or thicken it)...
- A Nurbs curve consists of a list of CVs (x0, y0, z0, w0, x1, y1, z1, w1,
...), and a knot vector (0.0, 0.0, 0.0, 1.0, 2.5, 4.0 ,5.0, 5.0
and do not
represent the opinions of NASA or any other party.
*From:*softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] *On Behalf Of *Eugen
Sares
*Sent:* Wednesday, June 19, 2013 3:28 AM
*To:* softimage@listproc.autodesk.com
*Subject:* Re: bezier - nurbs
Its been so long since I've tried this in Soft I can't remember...
Is there any logic or formula that will allow you to replicate a Bezier Knot
curve as a CV curve?
I thought all you had to do was make sure the CVs on a Nurbs curve matched the
handle points on a Bezier curve and they would
Raise the knot to multiplicity 3 (similar to bezier)
Lower the knots to 2 (curvature) first and second derivative continuity,
smoother curve.
Lower the knots to 1 (tangent) first derivative continuity, tangent
continuity
Lower the knots to 0 (linear), sharp turns, no continuity between knots
On
Oops, reverse.
From the book
Multiplicity is a property of knots that refers to the number of control
points associated to a knot. On a cubic curve, a knot can have a
multiplicity of 1, 2, or 3. On a surface, each knot curve has two
multiplicities: one in the U direction and one in V. All knots
Bezier and NURBS are different.
NURBS have a weight attribute on each knot that allow you to adjust the
curve. You cannot create a perfect circle with bezier curve but you can
with NURBS curves because of the non-rational attributes (weighting or the
Knots).
On Tue, Jun 18, 2013 at 4:39 PM,
...@listproc.autodesk.com] On Behalf Of Daniel Brassard
Sent: Tuesday, June 18, 2013 4:40 PM
To: softimage@listproc.autodesk.com
Subject: Re: bezier - nurbs
Oops, reverse.
From the book
Multiplicity is a property of knots that refers to the number of control points
associated to a knot. On a cubic curve, a knot
] *On Behalf Of *Daniel Brassard
*Sent:* Tuesday, June 18, 2013 4:40 PM
*To:* softimage@listproc.autodesk.com
*Subject:* Re: bezier - nurbs
** **
Oops, reverse.
** **
From the book
** **
Multiplicity is a property of knots that refers to the number of control
points associated
only ever be an approximation.
gray
From: softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Ponthieux, Joseph
G. (LARC-E1A)[LITES]
Sent: Tuesday, June 18, 2013 04:08 PM
To: softimage@listproc.autodesk.com
Subject: bezier - nurbs
Its been so long
@listproc.autodesk.commailto:softimage@listproc.autodesk.com
Subject: bezier - nurbs
Its been so long since I've tried this in Soft I can't remember...
Is there any logic or formula that will allow you to replicate a Bezier Knot
curve as a CV curve?
I thought all you had to do was make sure the CVs
-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Daniel Brassard
Sent: Tuesday, June 18, 2013 4:54 PM
To: softimage@listproc.autodesk.com
Subject: Re: bezier - nurbs
There are also the degree and parameterization of the NURB curve. Did you try
...@listproc.autodesk.com] On Behalf Of Ponthieux, Joseph
G. (LARC-E1A)[LITES]
Sent: Tuesday, June 18, 2013 04:49 PM
To: softimage@listproc.autodesk.com
Subject: RE: bezier - nurbs
Yeah, tried that, except when I set the multiplicity to 3 it apparently
converts the curve to Bezier control. Kinda defeats
of the author and do not
represent the opinions of NASA or any other party.
From: softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Grahame Fuller
Sent: Tuesday, June 18, 2013 5:16 PM
To: softimage@listproc.autodesk.com
Subject: RE: bezier - nurbs
A Bezier
14 matches
Mail list logo
