home *** CD-ROM | disk | FTP | other *** search
- From theseas!fs.Princeton.EDU!cek Thu, 1 Jul 93 08:24:33 EET
- Received: by kriton.UUCP (V1.16/Amiga)
- id AA00000; Thu, 1 Jul 93 08:24:33 EET
- Received: by theseas.ntua.gr with UUCP; Thu, 1 Jul 93 00:46:12 +0300
- Received: from mcsun.EU.net by pythia.ics.forth.gr via ITEnet with SMTP;
- id AA05912 (5.65c/FORTH-ICS-3.0-MHS-7.0); Wed, 30 Jun 1993 23:35:51 +0300
- Received: by mcsun.EU.net with UUCP
- id AA17351 (5.65b/CWI-%I%); Wed, 30 Jun 1993 22:35:30 +0200
- Received: from Princeton.EDU by relay1.UU.NET with SMTP
- (5.61/UUNET-internet-primary) id AA17461; Mon, 28 Jun 93 07:36:27 -0400
- Received: from fs.Princeton.EDU by Princeton.EDU (5.65b/2.96/princeton)
- id AA06542; Mon, 28 Jun 93 07:35:09 -0400
- Received: by fs.Princeton.EDU (4.1/1.105)
- id AA18872; Mon, 28 Jun 93 07:35:07 EDT
- Received: from faui45.informatik.uni-erlangen.de ([131.188.34.45]) by fs.Princeton.EDU (4.1/1.105)
- id AA18785; Mon, 28 Jun 93 07:34:10 EDT
- Received: from faui43.informatik.uni-erlangen.de by uni-erlangen.de with SMTP;
- id AA11826 (5.65c-5/7.3u-FAU); Mon, 28 Jun 1993 13:34:03 +0200
- Received: by immd4.informatik.uni-erlangen.de;
- id AA03497 (5.65c-5/7.3m-FAU); Mon, 28 Jun 1993 13:34:01 +0200
- Message-Id: <199306281134.AA03497@faui43.informatik.uni-erlangen.de>
- Date: Mon, 28 Jun 93 13:34:01 METDST
- X-Mailer: ELM [version 2.3 PL11]
- Errors-To: Princeton.EDU!cek
- Remailed-Date: Mon Jun 28 07:34:26 EDT 1993
- From: "Michael Schroeder (Inf4 - hiwi)" <immd4.informatik.uni-erlangen.de!mlschroe>
- To: "Rayshade Distribution List" <cs.Princeton.EDU!rayshade-users>
- Subject: sphere...
-
-
- Uuuuugh, of cause the division by the radius of the sphere is
- now obsolete. The patch should read:
-
- *** sphere.c.orig Sun Jun 27 21:53:08 1993
- --- sphere.c Mon Jun 28 13:32:55 1993
- ***************
- *** 135,143 ****
- Sphere *sphere;
- Vector *pos, *nrm, *gnrm;
- {
- ! nrm->x = (pos->x - sphere->x) / sphere->r;
- ! nrm->y = (pos->y - sphere->y) / sphere->r;
- ! nrm->z = (pos->z - sphere->z) / sphere->r;
- *gnrm = *nrm;
- return FALSE;
- }
- --- 135,148 ----
- Sphere *sphere;
- Vector *pos, *nrm, *gnrm;
- {
- ! nrm->x = pos->x - sphere->x;
- ! nrm->y = pos->y - sphere->y;
- ! nrm->z = pos->z - sphere->z;
- ! /*
- ! * We cannot divide by sphere->r to normalize the vector
- ! * because of roundoff errors in the intersection calculation.
- ! */
- ! VecNormalize(nrm);
- *gnrm = *nrm;
- return FALSE;
- }
-
- Michael.
-
- ---------------------------------------------------------------
- Michael Schroeder mlschroe@faui43.informatik.uni-erlangen.de
- main(a){while(a=~getchar())putchar(~a-1/(~(a|32)/13*2-11)*13);}
-
- ----------
- Administrivia: rayshade-request@cs.princeton.edu
- Mailing list: rayshade-users@cs.princeton.edu
-
-