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Comparing ray/src/rt/aniso.c (file contents):
Revision 2.33 by gwlarson, Wed Dec 16 18:14:57 1998 UTC vs.
Revision 2.35 by greg, Tue Feb 25 02:47:22 2003 UTC

#	Line 1 | Line 1
1	–	/* Copyright (c) 1998 Silicon Graphics, Inc. */
2	–
1		#ifndef lint
2	<	static char SCCSid[] = "$SunId$ SGI";
2	>	static const char       RCSid[] = "$Id$";
3		#endif
6	–
4		/*
5		*  Shading functions for anisotropic materials.
6		*/
7
8	+	#include "copyright.h"
9	+
10		#include  "ray.h"
11
12		#include  "otypes.h"
#	Line 16 | Line 15 | static char SCCSid[] = "$SunId$ SGI";
15
16		#include  "random.h"
17
19	–	extern double  specthresh;              /* specular sampling threshold */
20	–	extern double  specjitter;              /* specular sampling jitter */
21	–
22	–	extern int  backvis;                    /* back faces visible? */
23	–
18		#ifndef  MAXITER
19		#define  MAXITER        10              /* maximum # specular ray attempts */
20		#endif
21
28	–	static  agaussamp(), getacoords();
29	–
22		/*
23		*      This routine implements the anisotropic Gaussian
24		*  model described by Ward in Siggraph `92 article.
#	Line 68 | Line 60 | typedef struct {
60		double  pdot;           /* perturbed dot product */
61		}  ANISODAT;            /* anisotropic material data */
62
63	+	static void     getacoords();
64	+	static void     agaussamp();
65
66	+
67	+	static void
68		diraniso(cval, np, ldir, omega)         /* compute source contribution */
69		COLOR  cval;                    /* returned coefficient */
70		register ANISODAT  *np;         /* material data */
#	Line 182 | Line 178 | double  omega;                 /* light source size */
178		}
179
180
181	+	int
182		m_aniso(m, r)                   /* shade ray that hit something anisotropic */
183		register OBJREC  *m;
184		register RAY  *r;
#	Line 307 | Line 304 | register RAY  *r;
304		}
305
306
307	<	static
307	>	static void
308		getacoords(r, np)               /* set up coordinate system */
309		RAY  *r;
310		register ANISODAT  *np;
#	Line 337 | Line 334 | register ANISODAT  *np;
334		}
335
336
337	<	static
337	>	static void
338		agaussamp(r, np)                /* sample anisotropic gaussian specular */
339		RAY  *r;
340		register ANISODAT  *np;

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