src/hd/rhd_sample.h

/* Copyright (c) 1998 Silicon Graphics, Inc. */

/* SCCSid "$SunId$ SGI" */

/*
 * Sample data structures for holodeck display drivers.
 */
#include "color.h"
#include "tonemap.h"
#include "rhdriver.h"

#ifndef int2
#define int2    short
#endif
#ifndef int4
#define int4    int
#endif

#ifndef INVALID
#define INVALID  -1
#endif


typedef struct samp {
        float           (*wp)[3];       /* world intersection point array */
        int4            *wd;            /* world direction array */
#ifndef HP_VERSION
        TMbright        *brt;           /* encoded brightness array */
#endif
        BYTE            (*chr)[3];      /* encoded chrominance array */
        BYTE            (*rgb)[3];      /* tone-mapped color array */
        int             *info;          /* Extra sample info */
        int             *info1;          /* Extra sample info */
        int             max_samp;       /* maximum number of samples */
        int             max_base_pt;     /* maximum number of aux points */
        int             next_base_pt;    /* next auxilliary point to add */
        int             replace_samp;   /* next sample to free  */
        int             num_samp;       /* current number of samples */
        int             tone_map;       /* pointer to next value(s)t tonemap*/
        int             free_samp;      /* free sample-not available yet */
        char            *base;          /* base of allocated memory */
} SAMP;

/* Sample field access macros */
#define S_W_PT(s)               ((s)->wp)
#define S_W_DIR(s)              ((s)->wd)
#define S_BRT(s)                ((s)->brt)
#define S_CHR(s)                ((s)->chr)
#define S_RGB(s)                ((s)->rgb)
#define S_INFO(s)               ((s)->info)
#define S_INFO1(s)               ((s)->info1)
#define S_MAX_SAMP(s)           ((s)->max_samp)
#define S_MAX_BASE_PT(s)        ((s)->max_base_pt)
#define S_NEXT_BASE_PT(s)       ((s)->next_base_pt)
#define S_REPLACE_SAMP(s)       ((s)->replace_samp)
#define S_NUM_SAMP(s)           ((s)->num_samp)
#define S_TONE_MAP(s)           ((s)->tone_map)
#define S_FREE_SAMP(s)          ((s)->free_samp)
#define S_BASE(s)               ((s)->base)

#define S_MAX_POINTS(s)         ((s)->max_base_pt)
#define S_NTH_W_PT(s,n)         (S_W_PT(s)[(n)])
#define S_NTH_W_DIR(s,n)        (S_W_DIR(s)[(n)])
#define S_NTH_RGB(s,n)          (S_RGB(s)[(n)])
#define S_NTH_CHR(s,n)          (S_CHR(s)[(n)])
#define S_NTH_INFO(s,n)         (S_INFO(s)[(n)])
#define S_NTH_INFO1(s,n)         (S_INFO1(s)[(n)])
#define S_NTH_BRT(s,n)          (S_BRT(s)[(n)])

/* Sample Flag macros */
#define S_IS_FLAG(s)            IS_FLAG(samp_flag,s)
#define S_SET_FLAG(s)           SET_FLAG(samp_flag,s)
#define S_CLR_FLAG(s)           CLR_FLAG(samp_flag,s)

#define S_NTH_NEXT(s,n)         S_NTH_W_DIR(s,n)
#define sUnalloc_samp(s,n) (S_NTH_NEXT(s,n)=S_FREE_SAMP(s),S_FREE_SAMP(s)=n)
#define sClear_base_points(s)  (S_NEXT_BASE_PT(s) = S_MAX_SAMP(s))
#define sClear(s)      sInit(s)
/* MAXDIFF2 Max allowed cos angle squared of sample dir from current view */
/* In terms of cos: if angle is 30: MAXDIFF2 = cos(30)^2, if difference
  is greater than this point not accepted on rebuild
  */
#define MAXDIFF2        0.75
/* Max difference in direction for points at infinity: if over 45degrees
  not accepted on rebuild cos(45)
  */
#define MAXDIR           0.70710678        
#define MAXQUALITY      10000   /* Maximum quality for rendering rep */

extern  SAMP rsL;                       
extern double   sDepthEps;      /* epsilon to compare depths (z fraction) */
extern int4     encodedir();    /* Encodes FVECT direction */
extern void     decodedir();    /* Decodes dir-> FVECT */
extern double   fdir2diff(), dir2diff(); /* Compare dir and FVECT */
extern int4    *samp_flag;     /* Per/sample flags s */

/* These values are set by the driver, and used in the OGL call for glFrustum*/
extern double dev_zmin,dev_zmax;

extern SAMP *sAlloc();


Revision:	3.6
Committed:	Mon Jun 7 13:23:48 1999 UTC (26 years, 7 months ago) by gwlarson
Content type:	text/plain
Branch:	MAIN
Changes since 3.5:	+20 -8 lines
Log Message:	miscellaneous changes
#	User	Rev	Content
1	gwlarson	3.1	/* Copyright (c) 1998 Silicon Graphics, Inc. */
2
3			/* SCCSid "$SunId$ SGI" */
4
5			/*
6			* Sample data structures for holodeck display drivers.
7			*/
8			#include "color.h"
9			#include "tonemap.h"
10			#include "rhdriver.h"
11
12			#ifndef int2
13			#define int2 short
14			#endif
15			#ifndef int4
16			#define int4 int
17			#endif
18	gwlarson	3.3
19			#ifndef INVALID
20			#define INVALID -1
21			#endif
22
23	gwlarson	3.6
24	gwlarson	3.3	typedef struct samp {
25	gwlarson	3.1	float (wp)[3]; / world intersection point array */
26			int4 wd; / world direction array */
27	gwlarson	3.3	#ifndef HP_VERSION
28	gwlarson	3.1	TMbright brt; / encoded brightness array */
29	gwlarson	3.3	#endif
30	gwlarson	3.1	BYTE (chr)[3]; / encoded chrominance array */
31			BYTE (rgb)[3]; / tone-mapped color array */
32	gwlarson	3.6	int info; / Extra sample info */
33			int info1; / Extra sample info */
34	gwlarson	3.1	int max_samp; /* maximum number of samples */
35	gwlarson	3.3	int max_base_pt; /* maximum number of aux points */
36			int next_base_pt; /* next auxilliary point to add */
37			int replace_samp; /* next sample to free */
38			int num_samp; /* current number of samples */
39			int tone_map; /* pointer to next value(s)t tonemap*/
40	gwlarson	3.6	int free_samp; /* free sample-not available yet */
41	gwlarson	3.1	char base; / base of allocated memory */
42	gwlarson	3.3	} SAMP;
43	gwlarson	3.1
44	gwlarson	3.3	/* Sample field access macros */
45			#define S_W_PT(s) ((s)->wp)
46			#define S_W_DIR(s) ((s)->wd)
47			#define S_BRT(s) ((s)->brt)
48			#define S_CHR(s) ((s)->chr)
49			#define S_RGB(s) ((s)->rgb)
50	gwlarson	3.6	#define S_INFO(s) ((s)->info)
51			#define S_INFO1(s) ((s)->info1)
52	gwlarson	3.3	#define S_MAX_SAMP(s) ((s)->max_samp)
53			#define S_MAX_BASE_PT(s) ((s)->max_base_pt)
54			#define S_NEXT_BASE_PT(s) ((s)->next_base_pt)
55			#define S_REPLACE_SAMP(s) ((s)->replace_samp)
56			#define S_NUM_SAMP(s) ((s)->num_samp)
57			#define S_TONE_MAP(s) ((s)->tone_map)
58	gwlarson	3.6	#define S_FREE_SAMP(s) ((s)->free_samp)
59	gwlarson	3.3	#define S_BASE(s) ((s)->base)
60	gwlarson	3.1
61	gwlarson	3.3	#define S_MAX_POINTS(s) ((s)->max_base_pt)
62			#define S_NTH_W_PT(s,n) (S_W_PT(s)[(n)])
63			#define S_NTH_W_DIR(s,n) (S_W_DIR(s)[(n)])
64			#define S_NTH_RGB(s,n) (S_RGB(s)[(n)])
65			#define S_NTH_CHR(s,n) (S_CHR(s)[(n)])
66	gwlarson	3.6	#define S_NTH_INFO(s,n) (S_INFO(s)[(n)])
67			#define S_NTH_INFO1(s,n) (S_INFO1(s)[(n)])
68	gwlarson	3.3	#define S_NTH_BRT(s,n) (S_BRT(s)[(n)])
69	gwlarson	3.6
70	gwlarson	3.3	/* Sample Flag macros */
71			#define S_IS_FLAG(s) IS_FLAG(samp_flag,s)
72			#define S_SET_FLAG(s) SET_FLAG(samp_flag,s)
73			#define S_CLR_FLAG(s) CLR_FLAG(samp_flag,s)
74	gwlarson	3.1
75	gwlarson	3.4	#define S_NTH_NEXT(s,n) S_NTH_W_DIR(s,n)
76	gwlarson	3.6	#define sUnalloc_samp(s,n) (S_NTH_NEXT(s,n)=S_FREE_SAMP(s),S_FREE_SAMP(s)=n)
77	gwlarson	3.3	#define sClear_base_points(s) (S_NEXT_BASE_PT(s) = S_MAX_SAMP(s))
78			#define sClear(s) sInit(s)
79	gwlarson	3.6	/* MAXDIFF2 Max allowed cos angle squared of sample dir from current view */
80			/* In terms of cos: if angle is 30: MAXDIFF2 = cos(30)^2, if difference
81			is greater than this point not accepted on rebuild
82			*/
83			#define MAXDIFF2 0.75
84			/* Max difference in direction for points at infinity: if over 45degrees
85			not accepted on rebuild cos(45)
86			*/
87			#define MAXDIR 0.70710678
88	gwlarson	3.5	#define MAXQUALITY 10000 /* Maximum quality for rendering rep */
89	gwlarson	3.1
90	gwlarson	3.3	extern SAMP rsL;
91			extern double sDepthEps; /* epsilon to compare depths (z fraction) */
92			extern int4 encodedir(); /* Encodes FVECT direction */
93			extern void decodedir(); /* Decodes dir-> FVECT */
94			extern double fdir2diff(), dir2diff(); /* Compare dir and FVECT */
95			extern int4 samp_flag; / Per/sample flags s */
96
97	gwlarson	3.1	/* These values are set by the driver, and used in the OGL call for glFrustum*/
98			extern double dev_zmin,dev_zmax;
99	gwlarson	3.3
100			extern SAMP *sAlloc();
101	gwlarson	3.1
102
103
104
105
106
107