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root/Development/ray/src/px/pf2.c
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Comparing ray/src/px/pf2.c (file contents):
Revision 2.7 by schorsch, Sun Mar 28 20:33:14 2004 UTC vs.
Revision 2.10 by greg, Thu Dec 7 21:15:54 2023 UTC

# Line 5 | Line 5 | static const char      RCSid[] = "$Id$";
5   *  pf2.c - routines used by pfilt.
6   */
7  
8 – #include  <stdio.h>
9 – #include  <stdlib.h>
10 – #include  <math.h>
11 –
12 – #include  "rterror.h"
13 – #include  "random.h"
14 – #include  "color.h"
8   #include  "pfilt.h"
9 + #include  "random.h"
10  
17 – #define  PI             3.14159265359
18 – #define  FTINY          (1e-6)
19 –
11   #define  AVGLVL         0.5     /* target mean brightness */
12  
13   double  avgbrt;                 /* average picture brightness */
# Line 36 | Line 27 | double sprdfact;               /* computed spread factor */
27   static void starpoint(COLOR  fcol, int  x, int  y, HOTPIX        *hp);
28  
29  
30 < extern void
30 > void
31   pass1init(void)                 /* prepare for first pass */
32   {
33          avgbrt = 0.0;
# Line 45 | Line 36 | pass1init(void)                        /* prepare for first pass */
36   }
37  
38  
39 < extern void
39 > void
40   pass1default(void)                      /* for single pass */
41   {
42          avgbrt = AVGLVL;
# Line 54 | Line 45 | pass1default(void)                     /* for single pass */
45   }
46  
47  
48 < extern void
48 > void
49   pass1scan(              /* process first pass scanline */
50 <        register COLOR  *scan,
50 >        COLOR   *scan,
51          int  y
52   )
53   {
54          double  cbrt;
55 <        register int  x;
56 <        register HOTPIX  *hp;
55 >        int  x;
56 >        HOTPIX   *hp;
57  
58          for (x = 0; x < xres; x++) {
59          
# Line 85 | Line 76 | pass1scan(             /* process first pass scanline */
76                          copycolor(hp->val, scan[x]);
77                          hp->x = x;
78                          hp->y = y;
79 <                        hp->slope = tan(PI*(0.5-(random()%npts+0.5)/npts));
79 >                        hp->slope = tan(PI*(0.5-(irandom(npts)+0.5)/npts));
80                          hp->next = head;
81                          head = hp;
82                  }
# Line 93 | Line 84 | pass1scan(             /* process first pass scanline */
84   }
85  
86  
87 < extern void
87 > void
88   pass2init(void)                 /* prepare for final pass */
89   {
90          if (!npix) {
# Line 110 | Line 101 | pass2init(void)                        /* prepare for final pass */
101   }
102  
103  
104 < extern void
104 > void
105   pass2scan(              /* process final pass scanline */
106 <        register COLOR  *scan,
106 >        COLOR   *scan,
107          int  y
108   )
109   {
110          int  xmin, xmax;
111 <        register int  x;
112 <        register HOTPIX  *hp;
111 >        int  x;
112 >        HOTPIX   *hp;
113          
114          for (hp = head; hp != NULL; hp = hp->next) {
115                  if (hp->slope > FTINY) {
# Line 151 | Line 142 | starpoint(             /* pixel is on the star's point */
142          COLOR  fcol,
143          int  x,
144          int  y,
145 <        register HOTPIX  *hp
145 >        HOTPIX   *hp
146   )
147   {
148          COLOR  ctmp;

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