🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.graphics.animation
Article #704

Re: Macintosh PlayMation experience

#704
From: chris williams
Date: Tue, 26 Jan 1993 02:49
49 lines
2944 bytes
 
In article Robert Reed writes:
>In article chrisw@fciad2.bsd.uchicago.edu (chris williams) writes:
>|In article  Jack Palevich <Jack_Palevich@Taligent.com> writes:
>|>Cons:
>|> * Weird user interface. Doesn't work like a Mac program. Limited Undo.
>|
>|    Different user interface. Most parts of the Mac paradime don't
>|apply. Most 3D programs have *no* undo at all.
 
>Weird or different, it's still not as good.  Node selection is not a natural
>extension of typical point selection techniques, but a completely different
>and nonintuitive offshoot. 
 
   Intuitive in the real sense, or "intuitive" is the Mac-buzzword sense?
Press the "g" key for group. Press "Return" to un-group all. About two minutes
to get it, tops.
 
>Spline curvatures are edited by nonintuitive curvature control parameters
>attached to the nodes, 
 
   Complain to Ed Catmull. Catmull-Rom splines behave differently than the
Bezier splines that you are used to. The advantages of these splines for
easy objects creation are fairly obvious. Bezier patches are difficult to
control when you want to create a mesh, while continuity between Catmull
patches is simple. B-Spline patches have continuity, but require "ghost
points" outside the object.
 
>There is pointer based control of these
>curvature parameters, but it's a crude second order effect (e.g., you 
>move the cursor back and forth, and the curvature parameter is modified
>over SOME range, which shows up as some one or two axis flex of the curve.
 
   I have built *many* objects, and have *yet* to use the curve controls.
I suspect that you are trying to force the Catmull-Rom splines to behave as
Bezier patches, and are getting frustrated. Read up on Catmull-Rom patches.
(...and why you shouldn't put <tab>'s in an ASCII forum)
 
>________________________________________________________________________________
>Robert Reed                    Home Animation Ltd.             503-656-8414
>robert@slipknot.rain.com       5686 First Court, West Linn, OR 97068
>
>When I'm really bored, I hope to drive downtown, get a great parking spot,
>then sit in my car and count how many people asked me if I'm leaving.
>--Steve Wright
>________________________________________________________________________________
 
                             Chris Williams
                              chrisw@fciad2.bsd.uchicago.edu
Technical Details
Message-ID: <1993Jan26.024907.1777@midway.uchicago.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!uwm.edu!linac!uchinews!fciad2.bsd.uchicago.edu!chrisw
References: <C1CI80.Iq@taligent.com> <1993Jan24.093443.6267@midway.uchicago.edu> <C1DonD.2A5@slipknot.rain.com>

Show Full Headers
Complete Article Headers
Newsgroups: comp.graphics.animation
Path: arc1-ca.pugleaf.net!sparky!uunet!cs.utexas.edu!uwm.edu!linac!uchinews!fciad2.bsd.uchicago.edu!chrisw
From: chrisw@fciad2.bsd.uchicago.edu (chris williams)
Subject: Re: Macintosh PlayMation experience
Message-ID: <1993Jan26.024907.1777@midway.uchicago.edu>
Sender: news@uchinews.uchicago.edu (News System)
Organization: FCIA Univ. of Chicago
References: <C1CI80.Iq@taligent.com> <1993Jan24.093443.6267@midway.uchicago.edu> <C1DonD.2A5@slipknot.rain.com>
Date: Tue, 26 Jan 1993 02:49:07 GMT
Lines: 50