1 |
greg |
1.1 |
/* Copyright (c) 1987 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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7 |
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/* |
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* rview.c - routines and variables for interactive view generation. |
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* |
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* 3/24/87 |
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*/ |
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#include "standard.h" |
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#include "color.h" |
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#include "rpaint.h" |
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#include <signal.h> |
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21 |
greg |
1.13 |
#include <setjmp.h> |
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23 |
greg |
1.1 |
#include <ctype.h> |
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25 |
greg |
1.9 |
VIEW ourview = STDVIEW; /* viewing parameters */ |
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int hresolu, vresolu; /* image resolution */ |
27 |
greg |
1.1 |
|
28 |
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int psample = 8; /* pixel sample size */ |
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double maxdiff = .15; /* max. sample difference */ |
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31 |
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double exposure = 1.0; /* exposure for scene */ |
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33 |
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double dstrsrc = 0.0; /* square source distribution */ |
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greg |
1.3 |
double shadthresh = .1; /* shadow threshold */ |
35 |
greg |
1.4 |
double shadcert = .25; /* shadow certainty */ |
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greg |
1.1 |
|
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int maxdepth = 4; /* maximum recursion depth */ |
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double minweight = 1e-2; /* minimum ray weight */ |
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40 |
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COLOR ambval = BLKCOLOR; /* ambient value */ |
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double ambacc = 0.2; /* ambient accuracy */ |
42 |
greg |
1.5 |
int ambres = 8; /* ambient resolution */ |
43 |
greg |
1.1 |
int ambdiv = 32; /* ambient divisions */ |
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int ambssamp = 0; /* ambient super-samples */ |
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int ambounce = 0; /* ambient bounces */ |
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char *amblist[128]; /* ambient include/exclude list */ |
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int ambincl = -1; /* include == 1, exclude == 0 */ |
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49 |
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int greyscale = 0; /* map colors to brightness? */ |
50 |
greg |
1.11 |
char *devname = dev_default; /* output device name */ |
51 |
greg |
1.1 |
|
52 |
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struct driver *dev = NULL; /* driver functions */ |
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54 |
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VIEW oldview; /* previous view parameters */ |
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56 |
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PNODE ptrunk; /* the base of our image */ |
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RECT pframe; /* current frame boundaries */ |
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int pdepth; /* image depth in current frame */ |
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60 |
greg |
1.13 |
static jmp_buf mainloop; /* longjmp back to main loop */ |
61 |
greg |
1.12 |
static char *reserve_mem = NULL; /* pre-allocated reserve memory */ |
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63 |
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#define RESERVE_AMT 8192 /* amount of memory to reserve */ |
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65 |
greg |
1.1 |
#define CTRL(c) ('c'-'@') |
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67 |
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68 |
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quit(code) /* quit program */ |
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int code; |
70 |
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{ |
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devclose(); |
72 |
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exit(code); |
73 |
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} |
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75 |
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devopen(dname) /* open device driver */ |
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char *dname; |
78 |
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{ |
79 |
greg |
1.6 |
extern char *progname, *octname; |
80 |
greg |
1.7 |
char *id; |
81 |
greg |
1.1 |
register int i; |
82 |
greg |
1.6 |
|
83 |
greg |
1.7 |
id = octname!=NULL ? octname : progname; |
84 |
greg |
1.1 |
/* check device table */ |
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for (i = 0; devtable[i].name; i++) |
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if (!strcmp(dname, devtable[i].name)) |
87 |
greg |
1.7 |
if ((dev = (*devtable[i].init)(dname, id)) == NULL) { |
88 |
greg |
1.1 |
sprintf(errmsg, "cannot initialize %s", dname); |
89 |
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error(USER, errmsg); |
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} else |
91 |
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return; |
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/* not there, try exec */ |
93 |
greg |
1.7 |
if ((dev = comm_init(dname, id)) == NULL) { |
94 |
greg |
1.1 |
sprintf(errmsg, "cannot start device \"%s\"", dname); |
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error(USER, errmsg); |
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} |
97 |
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} |
98 |
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99 |
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100 |
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devclose() /* close our device */ |
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{ |
102 |
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if (dev != NULL) |
103 |
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(*dev->close)(); |
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dev = NULL; |
105 |
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} |
106 |
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107 |
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108 |
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printdevices() /* print list of output devices */ |
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{ |
110 |
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register int i; |
111 |
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112 |
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for (i = 0; devtable[i].name; i++) |
113 |
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printf("%-16s # %s\n", devtable[i].name, devtable[i].descrip); |
114 |
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} |
115 |
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116 |
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117 |
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rview() /* do a view */ |
118 |
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{ |
119 |
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char buf[32]; |
120 |
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121 |
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devopen(devname); /* open device */ |
122 |
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newimage(); /* set up image */ |
123 |
greg |
1.13 |
setjmp(mainloop); |
124 |
greg |
1.1 |
for ( ; ; ) { /* quit in command() */ |
125 |
greg |
1.9 |
while (hresolu <= 1<<pdepth && |
126 |
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vresolu <= 1<<pdepth) |
127 |
greg |
1.1 |
command("done: "); |
128 |
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129 |
greg |
1.9 |
if (hresolu <= psample<<pdepth && |
130 |
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vresolu <= psample<<pdepth) { |
131 |
greg |
1.1 |
sprintf(buf, "%d sampling...\n", 1<<pdepth); |
132 |
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(*dev->comout)(buf); |
133 |
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rsample(); |
134 |
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} else { |
135 |
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sprintf(buf, "%d refining...\n", 1<<pdepth); |
136 |
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(*dev->comout)(buf); |
137 |
greg |
1.9 |
refine(&ptrunk, 0, 0, hresolu, vresolu, pdepth+1); |
138 |
greg |
1.1 |
} |
139 |
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if (dev->inpready) |
140 |
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command(": "); |
141 |
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else |
142 |
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pdepth++; |
143 |
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} |
144 |
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} |
145 |
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146 |
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147 |
greg |
1.12 |
memreserve() /* fill memory reserves */ |
148 |
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{ |
149 |
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if (reserve_mem != NULL) |
150 |
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return; /* got some already */ |
151 |
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reserve_mem = malloc(RESERVE_AMT); |
152 |
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} |
153 |
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154 |
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155 |
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memerror(detail) /* try and rescue a memory error */ |
156 |
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char *detail; |
157 |
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{ |
158 |
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if (reserve_mem == NULL) { |
159 |
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sprintf(errmsg, "out of memory %s", detail); |
160 |
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error(SYSTEM, errmsg); |
161 |
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} |
162 |
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free(reserve_mem); |
163 |
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reserve_mem = NULL; |
164 |
greg |
1.13 |
do |
165 |
greg |
1.12 |
command("out of memory: "); |
166 |
greg |
1.13 |
while (reserve_mem == NULL); |
167 |
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longjmp(mainloop, 1); |
168 |
greg |
1.12 |
} |
169 |
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170 |
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171 |
greg |
1.1 |
command(prompt) /* get/execute command */ |
172 |
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char *prompt; |
173 |
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{ |
174 |
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#define badcom(s) strncmp(s, inpbuf, args-inpbuf-1) |
175 |
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double atof(); |
176 |
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char inpbuf[256]; |
177 |
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char *args; |
178 |
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again: |
179 |
greg |
1.10 |
(*dev->comin)(inpbuf, prompt); /* get command + arguments */ |
180 |
greg |
1.1 |
for (args = inpbuf; *args && *args != ' '; args++) |
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; |
182 |
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if (*args) *args++ = '\0'; |
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else *++args = '\0'; |
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185 |
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switch (inpbuf[0]) { |
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case 'f': /* new frame */ |
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if (badcom("frame")) |
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goto commerr; |
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getframe(args); |
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break; |
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case 'v': /* view */ |
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if (badcom("view")) |
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goto commerr; |
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getview(args); |
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break; |
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case 'l': /* last view */ |
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if (badcom("last")) |
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goto commerr; |
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lastview(args); |
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break; |
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case 'e': /* exposure */ |
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if (badcom("exposure")) |
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goto commerr; |
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getexposure(args); |
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break; |
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case 's': /* set a parameter */ |
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if (badcom("set")) |
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goto commerr; |
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setparam(args); |
210 |
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break; |
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case 'n': /* new picture */ |
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if (badcom("new")) |
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goto commerr; |
214 |
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newimage(); |
215 |
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break; |
216 |
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case 't': /* trace a ray */ |
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if (badcom("trace")) |
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goto commerr; |
219 |
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traceray(args); |
220 |
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break; |
221 |
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case 'a': /* aim camera */ |
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if (badcom("aim")) |
223 |
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goto commerr; |
224 |
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getaim(args); |
225 |
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break; |
226 |
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case 'm': /* move camera */ |
227 |
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if (badcom("move")) |
228 |
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goto commerr; |
229 |
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getmove(args); |
230 |
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break; |
231 |
greg |
1.8 |
case 'r': /* rotate/repaint */ |
232 |
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if (badcom("rotate")) { |
233 |
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if (badcom("repaint")) |
234 |
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goto commerr; |
235 |
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getrepaint(args); |
236 |
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break; |
237 |
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} |
238 |
greg |
1.1 |
getrotate(args); |
239 |
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break; |
240 |
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case 'p': /* pivot view */ |
241 |
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if (badcom("pivot")) |
242 |
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goto commerr; |
243 |
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getpivot(args); |
244 |
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break; |
245 |
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case CTRL(R): /* redraw */ |
246 |
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redraw(); |
247 |
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break; |
248 |
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case 'w': /* write */ |
249 |
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if (badcom("write")) |
250 |
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goto commerr; |
251 |
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writepict(args); |
252 |
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break; |
253 |
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case 'q': /* quit */ |
254 |
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if (badcom("quit")) |
255 |
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goto commerr; |
256 |
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quit(0); |
257 |
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case CTRL(C): /* interrupt */ |
258 |
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goto again; |
259 |
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#ifdef SIGTSTP |
260 |
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case CTRL(Z): /* stop */ |
261 |
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devclose(); |
262 |
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kill(0, SIGTSTP); |
263 |
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/* pc stops here */ |
264 |
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devopen(devname); |
265 |
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redraw(); |
266 |
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break; |
267 |
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#endif |
268 |
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case '\0': /* continue */ |
269 |
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break; |
270 |
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default:; |
271 |
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commerr: |
272 |
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if (iscntrl(inpbuf[0])) |
273 |
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sprintf(errmsg, "^%c: unknown control", |
274 |
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inpbuf[0]|0100); |
275 |
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else |
276 |
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sprintf(errmsg, "%s: unknown command", inpbuf); |
277 |
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error(COMMAND, errmsg); |
278 |
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break; |
279 |
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} |
280 |
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#undef badcom |
281 |
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} |
282 |
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283 |
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284 |
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rsample() /* sample the image */ |
285 |
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{ |
286 |
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int xsiz, ysiz, y; |
287 |
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RECT r; |
288 |
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PNODE *p; |
289 |
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register RECT *rl; |
290 |
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register PNODE **pl; |
291 |
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register int x; |
292 |
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/* |
293 |
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* We initialize the bottom row in the image at our current |
294 |
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* resolution. During sampling, we check super-pixels to the |
295 |
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* right and above by calling bigdiff(). If there is a significant |
296 |
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* difference, we subsample the super-pixels. The testing process |
297 |
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* includes initialization of the next row. |
298 |
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*/ |
299 |
greg |
1.9 |
xsiz = (((pframe.r-pframe.l)<<pdepth)+hresolu-1) / hresolu; |
300 |
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ysiz = (((pframe.u-pframe.d)<<pdepth)+vresolu-1) / vresolu; |
301 |
greg |
1.1 |
rl = (RECT *)malloc(xsiz*sizeof(RECT)); |
302 |
greg |
1.12 |
if (rl == NULL) |
303 |
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memerror("in rsample"); |
304 |
greg |
1.1 |
pl = (PNODE **)malloc(xsiz*sizeof(PNODE *)); |
305 |
greg |
1.12 |
if (pl == NULL) |
306 |
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memerror("in rsample"); |
307 |
greg |
1.1 |
/* |
308 |
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* Initialize the bottom row. |
309 |
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*/ |
310 |
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rl[0].l = rl[0].d = 0; |
311 |
greg |
1.9 |
rl[0].r = hresolu; rl[0].u = vresolu; |
312 |
greg |
1.1 |
pl[0] = findrect(pframe.l, pframe.d, &ptrunk, rl, pdepth); |
313 |
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for (x = 1; x < xsiz; x++) { |
314 |
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rl[x].l = rl[x].d = 0; |
315 |
greg |
1.9 |
rl[x].r = hresolu; rl[x].u = vresolu; |
316 |
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pl[x] = findrect(pframe.l+((x*hresolu)>>pdepth), |
317 |
greg |
1.1 |
pframe.d, &ptrunk, rl+x, pdepth); |
318 |
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} |
319 |
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/* sample the image */ |
320 |
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for (y = 0; /* y < ysiz */ ; y++) { |
321 |
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for (x = 0; x < xsiz-1; x++) { |
322 |
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if (dev->inpready) |
323 |
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goto escape; |
324 |
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/* |
325 |
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* Test super-pixel to the right. |
326 |
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*/ |
327 |
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if (pl[x] != pl[x+1] && bigdiff(pl[x]->v, |
328 |
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pl[x+1]->v, maxdiff)) { |
329 |
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refine(pl[x], rl[x].l, rl[x].d, |
330 |
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rl[x].r, rl[x].u, 1); |
331 |
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refine(pl[x+1], rl[x+1].l, rl[x+1].d, |
332 |
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rl[x+1].r, rl[x+1].u, 1); |
333 |
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} |
334 |
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} |
335 |
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if (y >= ysiz-1) |
336 |
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break; |
337 |
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for (x = 0; x < xsiz; x++) { |
338 |
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if (dev->inpready) |
339 |
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goto escape; |
340 |
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/* |
341 |
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* Find super-pixel at this position in next row. |
342 |
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*/ |
343 |
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r.l = r.d = 0; |
344 |
greg |
1.9 |
r.r = hresolu; r.u = vresolu; |
345 |
|
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p = findrect(pframe.l+((x*hresolu)>>pdepth), |
346 |
|
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pframe.d+(((y+1)*vresolu)>>pdepth), |
347 |
greg |
1.1 |
&ptrunk, &r, pdepth); |
348 |
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/* |
349 |
|
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* Test super-pixel in next row. |
350 |
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*/ |
351 |
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if (pl[x] != p && bigdiff(pl[x]->v, p->v, maxdiff)) { |
352 |
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refine(pl[x], rl[x].l, rl[x].d, |
353 |
|
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rl[x].r, rl[x].u, 1); |
354 |
|
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refine(p, r.l, r.d, r.r, r.u, 1); |
355 |
|
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} |
356 |
|
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/* |
357 |
|
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* Copy into super-pixel array. |
358 |
|
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*/ |
359 |
|
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rl[x].l = r.l; rl[x].d = r.d; |
360 |
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rl[x].r = r.r; rl[x].u = r.u; |
361 |
|
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pl[x] = p; |
362 |
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} |
363 |
|
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} |
364 |
|
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escape: |
365 |
|
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free((char *)rl); |
366 |
|
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free((char *)pl); |
367 |
|
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} |
368 |
|
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|
369 |
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|
370 |
|
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int |
371 |
|
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refine(p, xmin, ymin, xmax, ymax, pd) /* refine a node */ |
372 |
|
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register PNODE *p; |
373 |
|
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int xmin, ymin, xmax, ymax; |
374 |
|
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int pd; |
375 |
|
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{ |
376 |
|
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int growth; |
377 |
|
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int mx, my; |
378 |
|
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int i; |
379 |
|
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|
380 |
|
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if (dev->inpready) /* quit for input */ |
381 |
|
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return(0); |
382 |
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383 |
|
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if (pd <= 0) /* depth limit */ |
384 |
|
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return(0); |
385 |
|
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|
386 |
|
|
mx = (xmin + xmax) >> 1; |
387 |
|
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my = (ymin + ymax) >> 1; |
388 |
|
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growth = 0; |
389 |
|
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|
390 |
|
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if (p->kid == NULL) { /* subdivide */ |
391 |
|
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|
392 |
|
|
if ((p->kid = newptree()) == NULL) |
393 |
greg |
1.12 |
memerror("in refine"); |
394 |
greg |
1.1 |
/* |
395 |
|
|
* The following paint order can leave a black pixel |
396 |
|
|
* when redraw() is called in (*dev->paintr)(). |
397 |
|
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*/ |
398 |
|
|
if (p->x >= mx && p->y >= my) |
399 |
|
|
pcopy(p, p->kid+UR); |
400 |
|
|
else |
401 |
|
|
paint(p->kid+UR, mx, my, xmax, ymax); |
402 |
|
|
if (p->x < mx && p->y >= my) |
403 |
|
|
pcopy(p, p->kid+UL); |
404 |
|
|
else |
405 |
|
|
paint(p->kid+UL, xmin, my, mx, ymax); |
406 |
|
|
if (p->x >= mx && p->y < my) |
407 |
|
|
pcopy(p, p->kid+DR); |
408 |
|
|
else |
409 |
|
|
paint(p->kid+DR, mx, ymin, xmax, my); |
410 |
|
|
if (p->x < mx && p->y < my) |
411 |
|
|
pcopy(p, p->kid+DL); |
412 |
|
|
else |
413 |
|
|
paint(p->kid+DL, xmin, ymin, mx, my); |
414 |
|
|
|
415 |
|
|
growth++; |
416 |
|
|
} |
417 |
|
|
/* do children */ |
418 |
|
|
if (mx > pframe.l) { |
419 |
|
|
if (my > pframe.d) |
420 |
|
|
growth += refine(p->kid+DL, xmin, ymin, mx, my, pd-1); |
421 |
|
|
if (my < pframe.u) |
422 |
|
|
growth += refine(p->kid+UL, xmin, my, mx, ymax, pd-1); |
423 |
|
|
} |
424 |
|
|
if (mx < pframe.r) { |
425 |
|
|
if (my > pframe.d) |
426 |
|
|
growth += refine(p->kid+DR, mx, ymin, xmax, my, pd-1); |
427 |
|
|
if (my < pframe.u) |
428 |
|
|
growth += refine(p->kid+UR, mx, my, xmax, ymax, pd-1); |
429 |
|
|
} |
430 |
|
|
/* recompute sum */ |
431 |
|
|
if (growth) { |
432 |
|
|
setcolor(p->v, 0.0, 0.0, 0.0); |
433 |
|
|
for (i = 0; i < 4; i++) |
434 |
|
|
addcolor(p->v, p->kid[i].v); |
435 |
|
|
scalecolor(p->v, 0.25); |
436 |
|
|
} |
437 |
|
|
return(growth); |
438 |
|
|
} |