X-Received: by 10.182.216.232 with SMTP id ot8mr8812324obc.49.1429334885263; Fri, 17 Apr 2015 22:28:05 -0700 (PDT) X-Received: by 10.140.102.172 with SMTP id w41mr85235qge.40.1429334885113; Fri, 17 Apr 2015 22:28:05 -0700 (PDT) Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.glorb.com!l13no6644003iga.0!news-out.google.com!a41ni740qgf.1!nntp.google.com!z60no2383640qgd.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.graphics.rendering.renderman Date: Fri, 17 Apr 2015 22:28:04 -0700 (PDT) In-Reply-To: <2d3da870-b53d-4737-a4a0-0432b44a70f3@googlegroups.com> Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=80.185.179.49; posting-account=vrfdLAoAAAAauX_3XwyXEwXCWN3A1l8D NNTP-Posting-Host: 80.185.179.49 References: <2d3da870-b53d-4737-a4a0-0432b44a70f3@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Re: Basic question on transformations From: =?ISO-8859-1?Q?Yannick_Duch=EAne?= Injection-Date: Sat, 18 Apr 2015 05:28:05 +0000 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Xref: csiph.com comp.graphics.rendering.renderman:60 Le samedi 18 avril 2015 04:39:11 UTC+2, Yannick Duch=EAne a =E9crit=A0: >=20 > Where have I made an erroneous assumption? With the prior world coordinat= es transformations or with object coordinates transformations in the world = coordinates? May be my error was to assume the positive rotation around the X axis, make= s the Y axis go toward the Z axis? Is this the error I made?