1 |
greg |
1.1 |
#ifndef lint |
2 |
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static char SCCSid[] = "$SunId$ LBL"; |
3 |
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#endif |
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5 |
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/* |
6 |
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* Interpolate and extrapolate pictures with different view parameters. |
7 |
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* |
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* Greg Ward 09Dec89 |
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*/ |
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#include "standard.h" |
12 |
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13 |
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#include "view.h" |
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15 |
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#include "color.h" |
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17 |
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#define pscan(y) (ourpict+(y)*ourview.hresolu) |
18 |
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#define zscan(y) (ourzbuf+(y)*ourview.hresolu) |
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20 |
greg |
1.11 |
#define F_FORE 1 /* fill foreground */ |
21 |
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#define F_BACK 2 /* fill background */ |
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23 |
greg |
1.3 |
#define ABS(x) ((x)>0?(x):-(x)) |
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25 |
greg |
1.1 |
VIEW ourview = STDVIEW(512); /* desired view */ |
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27 |
greg |
1.8 |
double zeps = .02; /* allowed z epsilon */ |
28 |
greg |
1.1 |
|
29 |
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COLR *ourpict; /* output picture */ |
30 |
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float *ourzbuf; /* corresponding z-buffer */ |
31 |
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32 |
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char *progname; |
33 |
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34 |
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VIEW theirview = STDVIEW(512); /* input view */ |
35 |
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int gotview; /* got input view? */ |
36 |
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37 |
greg |
1.11 |
int fill = F_FORE|F_BACK; /* fill level */ |
38 |
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COLR backcolr = BLKCOLR; /* background color */ |
39 |
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40 |
greg |
1.5 |
double theirs2ours[4][4]; /* transformation matrix */ |
41 |
greg |
1.11 |
int normdist = 1; /* normalized distance? */ |
42 |
greg |
1.1 |
|
43 |
greg |
1.5 |
|
44 |
greg |
1.1 |
main(argc, argv) /* interpolate pictures */ |
45 |
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int argc; |
46 |
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char *argv[]; |
47 |
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{ |
48 |
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#define check(olen,narg) if (argv[i][olen] || narg >= argc-i) goto badopt |
49 |
greg |
1.11 |
extern double atof(); |
50 |
greg |
1.1 |
int gotvfile = 0; |
51 |
greg |
1.11 |
char *zfile = NULL; |
52 |
greg |
1.1 |
char *err; |
53 |
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int i; |
54 |
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55 |
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progname = argv[0]; |
56 |
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57 |
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for (i = 1; i < argc && argv[i][0] == '-'; i++) |
58 |
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switch (argv[i][1]) { |
59 |
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case 't': /* threshold */ |
60 |
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check(2,1); |
61 |
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zeps = atof(argv[++i]); |
62 |
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break; |
63 |
greg |
1.11 |
case 'n': /* dist. normalized? */ |
64 |
greg |
1.10 |
check(2,0); |
65 |
greg |
1.11 |
normdist = !normdist; |
66 |
greg |
1.10 |
break; |
67 |
greg |
1.11 |
case 'f': /* fill type */ |
68 |
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switch (argv[i][2]) { |
69 |
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case '0': /* none */ |
70 |
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check(3,0); |
71 |
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fill = 0; |
72 |
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break; |
73 |
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case 'f': /* foreground */ |
74 |
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check(3,0); |
75 |
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fill = F_FORE; |
76 |
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break; |
77 |
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case 'b': /* background */ |
78 |
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check(3,0); |
79 |
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fill = F_BACK; |
80 |
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break; |
81 |
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case 'a': /* all */ |
82 |
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check(3,0); |
83 |
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fill = F_FORE|F_BACK; |
84 |
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break; |
85 |
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case 'c': /* color */ |
86 |
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check(3,3); |
87 |
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setcolr(backcolr, atof(argv[i+1]), |
88 |
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atof(argv[i+2]), atof(argv[i+3])); |
89 |
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i += 3; |
90 |
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break; |
91 |
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default: |
92 |
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goto badopt; |
93 |
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} |
94 |
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break; |
95 |
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case 'z': /* z file */ |
96 |
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check(2,1); |
97 |
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zfile = argv[++i]; |
98 |
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break; |
99 |
greg |
1.6 |
case 'x': /* x resolution */ |
100 |
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check(2,1); |
101 |
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ourview.hresolu = atoi(argv[++i]); |
102 |
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break; |
103 |
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case 'y': /* y resolution */ |
104 |
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check(2,1); |
105 |
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ourview.vresolu = atoi(argv[++i]); |
106 |
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break; |
107 |
greg |
1.1 |
case 'v': /* view */ |
108 |
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switch (argv[i][2]) { |
109 |
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case 't': /* type */ |
110 |
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check(4,0); |
111 |
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ourview.type = argv[i][3]; |
112 |
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break; |
113 |
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case 'p': /* point */ |
114 |
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check(3,3); |
115 |
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ourview.vp[0] = atof(argv[++i]); |
116 |
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ourview.vp[1] = atof(argv[++i]); |
117 |
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ourview.vp[2] = atof(argv[++i]); |
118 |
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break; |
119 |
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case 'd': /* direction */ |
120 |
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check(3,3); |
121 |
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ourview.vdir[0] = atof(argv[++i]); |
122 |
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ourview.vdir[1] = atof(argv[++i]); |
123 |
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ourview.vdir[2] = atof(argv[++i]); |
124 |
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break; |
125 |
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case 'u': /* up */ |
126 |
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check(3,3); |
127 |
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ourview.vup[0] = atof(argv[++i]); |
128 |
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ourview.vup[1] = atof(argv[++i]); |
129 |
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ourview.vup[2] = atof(argv[++i]); |
130 |
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break; |
131 |
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case 'h': /* horizontal */ |
132 |
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check(3,1); |
133 |
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ourview.horiz = atof(argv[++i]); |
134 |
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break; |
135 |
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case 'v': /* vertical */ |
136 |
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check(3,1); |
137 |
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ourview.vert = atof(argv[++i]); |
138 |
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break; |
139 |
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case 'f': /* file */ |
140 |
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check(3,1); |
141 |
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gotvfile = viewfile(argv[++i], &ourview); |
142 |
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if (gotvfile < 0) { |
143 |
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perror(argv[i]); |
144 |
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exit(1); |
145 |
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} else if (gotvfile == 0) { |
146 |
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fprintf(stderr, "%s: bad view file\n", |
147 |
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argv[i]); |
148 |
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exit(1); |
149 |
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} |
150 |
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break; |
151 |
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default: |
152 |
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goto badopt; |
153 |
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} |
154 |
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break; |
155 |
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default: |
156 |
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badopt: |
157 |
greg |
1.10 |
fprintf(stderr, "%s: command line error at '%s'\n", |
158 |
greg |
1.1 |
progname, argv[i]); |
159 |
greg |
1.10 |
goto userr; |
160 |
greg |
1.1 |
} |
161 |
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/* check arguments */ |
162 |
greg |
1.10 |
if (argc-i < 2 || (argc-i)%2) |
163 |
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goto userr; |
164 |
greg |
1.1 |
/* set view */ |
165 |
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if (err = setview(&ourview)) { |
166 |
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fprintf(stderr, "%s: %s\n", progname, err); |
167 |
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exit(1); |
168 |
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} |
169 |
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/* allocate frame */ |
170 |
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ourpict = (COLR *)calloc(ourview.hresolu*ourview.vresolu,sizeof(COLR)); |
171 |
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ourzbuf = (float *)calloc(ourview.hresolu*ourview.vresolu,sizeof(float)); |
172 |
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if (ourpict == NULL || ourzbuf == NULL) { |
173 |
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perror(progname); |
174 |
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exit(1); |
175 |
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} |
176 |
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/* get input */ |
177 |
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for ( ; i < argc; i += 2) |
178 |
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addpicture(argv[i], argv[i+1]); |
179 |
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/* fill in spaces */ |
180 |
greg |
1.11 |
if (fill&F_BACK) |
181 |
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fillpicture(); |
182 |
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else |
183 |
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backpicture(); |
184 |
greg |
1.1 |
/* add to header */ |
185 |
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printargs(argc, argv, stdout); |
186 |
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if (gotvfile) { |
187 |
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printf(VIEWSTR); |
188 |
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fprintview(&ourview, stdout); |
189 |
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printf("\n"); |
190 |
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} |
191 |
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printf("\n"); |
192 |
greg |
1.11 |
/* write picture */ |
193 |
greg |
1.1 |
writepicture(); |
194 |
greg |
1.11 |
/* write z file */ |
195 |
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if (zfile != NULL) |
196 |
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writedistance(zfile); |
197 |
greg |
1.1 |
|
198 |
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exit(0); |
199 |
greg |
1.10 |
userr: |
200 |
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fprintf(stderr, |
201 |
greg |
1.11 |
"Usage: %s [view opts][-t zthresh][-z zout][-fT][-n] pfile zspec ..\n", |
202 |
greg |
1.10 |
progname); |
203 |
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exit(1); |
204 |
greg |
1.1 |
#undef check |
205 |
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} |
206 |
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207 |
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208 |
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headline(s) /* process header string */ |
209 |
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char *s; |
210 |
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{ |
211 |
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static char *altname[] = {"rview","rpict","pinterp",VIEWSTR,NULL}; |
212 |
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register char **an; |
213 |
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214 |
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printf("\t%s", s); |
215 |
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216 |
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for (an = altname; *an != NULL; an++) |
217 |
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if (!strncmp(*an, s, strlen(*an))) { |
218 |
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if (sscanview(&theirview, s+strlen(*an)) == 0) |
219 |
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gotview++; |
220 |
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break; |
221 |
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} |
222 |
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} |
223 |
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224 |
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225 |
greg |
1.10 |
addpicture(pfile, zspec) /* add picture to output */ |
226 |
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char *pfile, *zspec; |
227 |
greg |
1.1 |
{ |
228 |
greg |
1.10 |
extern double atof(); |
229 |
greg |
1.1 |
FILE *pfp, *zfp; |
230 |
greg |
1.8 |
char *err; |
231 |
greg |
1.1 |
COLR *scanin; |
232 |
greg |
1.9 |
float *zin, *zlast; |
233 |
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int *plast; |
234 |
greg |
1.1 |
int y; |
235 |
greg |
1.10 |
/* open picture file */ |
236 |
greg |
1.1 |
if ((pfp = fopen(pfile, "r")) == NULL) { |
237 |
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perror(pfile); |
238 |
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exit(1); |
239 |
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} |
240 |
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/* get header and view */ |
241 |
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printf("%s:\n", pfile); |
242 |
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gotview = 0; |
243 |
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getheader(pfp, headline); |
244 |
greg |
1.9 |
if (!gotview || fgetresolu(&theirview.hresolu, &theirview.vresolu, pfp) |
245 |
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!= (YMAJOR|YDECR)) { |
246 |
greg |
1.1 |
fprintf(stderr, "%s: picture view error\n", pfile); |
247 |
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exit(1); |
248 |
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} |
249 |
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if (err = setview(&theirview)) { |
250 |
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fprintf(stderr, "%s: %s\n", pfile, err); |
251 |
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exit(1); |
252 |
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} |
253 |
greg |
1.5 |
/* compute transformation */ |
254 |
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pixform(theirs2ours, &theirview, &ourview); |
255 |
greg |
1.1 |
/* allocate scanlines */ |
256 |
greg |
1.9 |
scanin = (COLR *)malloc(theirview.hresolu*sizeof(COLR)); |
257 |
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zin = (float *)malloc(theirview.hresolu*sizeof(float)); |
258 |
greg |
1.10 |
plast = (int *)calloc(theirview.hresolu, sizeof(int)); |
259 |
greg |
1.9 |
zlast = (float *)calloc(theirview.hresolu, sizeof(float)); |
260 |
greg |
1.10 |
if (scanin == NULL || zin == NULL || plast == NULL || zlast == NULL) { |
261 |
greg |
1.1 |
perror(progname); |
262 |
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exit(1); |
263 |
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} |
264 |
greg |
1.10 |
/* get z specification or file */ |
265 |
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if ((zfp = fopen(zspec, "r")) == NULL) { |
266 |
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double zvalue; |
267 |
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register int x; |
268 |
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if (!isfloat(zspec) || (zvalue = atof(zspec)) <= 0.0) { |
269 |
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perror(zspec); |
270 |
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exit(1); |
271 |
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} |
272 |
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for (x = 0; x < theirview.hresolu; x++) |
273 |
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zin[x] = zvalue; |
274 |
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} |
275 |
greg |
1.1 |
/* load image */ |
276 |
greg |
1.9 |
for (y = theirview.vresolu-1; y >= 0; y--) { |
277 |
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if (freadcolrs(scanin, theirview.hresolu, pfp) < 0) { |
278 |
greg |
1.1 |
fprintf(stderr, "%s: read error\n", pfile); |
279 |
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exit(1); |
280 |
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} |
281 |
greg |
1.10 |
if (zfp != NULL |
282 |
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&& fread(zin,sizeof(float),theirview.hresolu,zfp) |
283 |
greg |
1.9 |
< theirview.hresolu) { |
284 |
greg |
1.10 |
fprintf(stderr, "%s: read error\n", zspec); |
285 |
greg |
1.1 |
exit(1); |
286 |
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} |
287 |
greg |
1.9 |
addscanline(y, scanin, zin, plast, zlast); |
288 |
greg |
1.1 |
} |
289 |
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/* clean up */ |
290 |
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free((char *)scanin); |
291 |
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free((char *)zin); |
292 |
greg |
1.9 |
free((char *)plast); |
293 |
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free((char *)zlast); |
294 |
greg |
1.1 |
fclose(pfp); |
295 |
greg |
1.10 |
if (zfp != NULL) |
296 |
|
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fclose(zfp); |
297 |
greg |
1.1 |
} |
298 |
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299 |
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|
300 |
greg |
1.5 |
pixform(xfmat, vw1, vw2) /* compute view1 to view2 matrix */ |
301 |
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register double xfmat[4][4]; |
302 |
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register VIEW *vw1, *vw2; |
303 |
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{ |
304 |
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double m4t[4][4]; |
305 |
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|
306 |
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setident4(xfmat); |
307 |
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xfmat[0][0] = vw1->vhinc[0]; |
308 |
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xfmat[0][1] = vw1->vhinc[1]; |
309 |
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xfmat[0][2] = vw1->vhinc[2]; |
310 |
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xfmat[1][0] = vw1->vvinc[0]; |
311 |
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xfmat[1][1] = vw1->vvinc[1]; |
312 |
|
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xfmat[1][2] = vw1->vvinc[2]; |
313 |
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xfmat[2][0] = vw1->vdir[0]; |
314 |
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xfmat[2][1] = vw1->vdir[1]; |
315 |
|
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xfmat[2][2] = vw1->vdir[2]; |
316 |
|
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xfmat[3][0] = vw1->vp[0]; |
317 |
|
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xfmat[3][1] = vw1->vp[1]; |
318 |
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xfmat[3][2] = vw1->vp[2]; |
319 |
|
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setident4(m4t); |
320 |
|
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m4t[0][0] = vw2->vhinc[0]/vw2->vhn2; |
321 |
|
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m4t[1][0] = vw2->vhinc[1]/vw2->vhn2; |
322 |
|
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m4t[2][0] = vw2->vhinc[2]/vw2->vhn2; |
323 |
|
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m4t[3][0] = -DOT(vw2->vp,vw2->vhinc)/vw2->vhn2; |
324 |
|
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m4t[0][1] = vw2->vvinc[0]/vw2->vvn2; |
325 |
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m4t[1][1] = vw2->vvinc[1]/vw2->vvn2; |
326 |
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m4t[2][1] = vw2->vvinc[2]/vw2->vvn2; |
327 |
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m4t[3][1] = -DOT(vw2->vp,vw2->vvinc)/vw2->vvn2; |
328 |
|
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m4t[0][2] = vw2->vdir[0]; |
329 |
|
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m4t[1][2] = vw2->vdir[1]; |
330 |
|
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m4t[2][2] = vw2->vdir[2]; |
331 |
|
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m4t[3][2] = -DOT(vw2->vp,vw2->vdir); |
332 |
|
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multmat4(xfmat, xfmat, m4t); |
333 |
|
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} |
334 |
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|
335 |
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|
336 |
greg |
1.8 |
addscanline(y, pline, zline, lasty, lastyz) /* add scanline to output */ |
337 |
greg |
1.1 |
int y; |
338 |
|
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COLR *pline; |
339 |
|
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float *zline; |
340 |
greg |
1.9 |
int *lasty; /* input/output */ |
341 |
|
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float *lastyz; /* input/output */ |
342 |
greg |
1.1 |
{ |
343 |
greg |
1.11 |
extern double sqrt(); |
344 |
greg |
1.5 |
double pos[3]; |
345 |
greg |
1.8 |
int lastx = 0; |
346 |
|
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double lastxz = 0; |
347 |
|
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double zt; |
348 |
|
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int xpos, ypos; |
349 |
greg |
1.1 |
register int x; |
350 |
|
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|
351 |
greg |
1.8 |
for (x = theirview.hresolu-1; x >= 0; x--) { |
352 |
greg |
1.5 |
pos[0] = x - .5*(theirview.hresolu-1); |
353 |
|
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pos[1] = y - .5*(theirview.vresolu-1); |
354 |
|
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pos[2] = zline[x]; |
355 |
|
|
if (theirview.type == VT_PER) { |
356 |
greg |
1.11 |
if (normdist) /* adjust for eye-ray distance */ |
357 |
greg |
1.10 |
pos[2] /= sqrt( 1. |
358 |
greg |
1.5 |
+ pos[0]*pos[0]*theirview.vhn2 |
359 |
|
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+ pos[1]*pos[1]*theirview.vvn2 ); |
360 |
|
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pos[0] *= pos[2]; |
361 |
|
|
pos[1] *= pos[2]; |
362 |
|
|
} |
363 |
|
|
multp3(pos, pos, theirs2ours); |
364 |
greg |
1.8 |
if (pos[2] <= 0) |
365 |
greg |
1.1 |
continue; |
366 |
greg |
1.5 |
if (ourview.type == VT_PER) { |
367 |
|
|
pos[0] /= pos[2]; |
368 |
|
|
pos[1] /= pos[2]; |
369 |
|
|
} |
370 |
|
|
pos[0] += .5*ourview.hresolu; |
371 |
|
|
pos[1] += .5*ourview.vresolu; |
372 |
greg |
1.8 |
if (pos[0] < 0 || (xpos = pos[0]) >= ourview.hresolu |
373 |
|
|
|| pos[1] < 0 || (ypos = pos[1]) >= ourview.vresolu) |
374 |
greg |
1.5 |
continue; |
375 |
greg |
1.8 |
/* add pixel to our image */ |
376 |
|
|
zt = 2.*zeps*zline[x]; |
377 |
|
|
addpixel(xpos, ypos, |
378 |
greg |
1.11 |
(fill&F_FORE && ABS(zline[x]-lastxz) <= zt) |
379 |
|
|
? lastx - xpos : 1, |
380 |
|
|
(fill&F_FORE && ABS(zline[x]-lastyz[x]) <= zt) |
381 |
|
|
? lasty[x] - ypos : 1, |
382 |
greg |
1.8 |
pline[x], pos[2]); |
383 |
|
|
lastx = xpos; |
384 |
|
|
lasty[x] = ypos; |
385 |
|
|
lastxz = lastyz[x] = zline[x]; |
386 |
greg |
1.1 |
} |
387 |
|
|
} |
388 |
|
|
|
389 |
|
|
|
390 |
greg |
1.8 |
addpixel(xstart, ystart, width, height, pix, z) /* fill in area for pixel */ |
391 |
|
|
int xstart, ystart; |
392 |
|
|
int width, height; |
393 |
|
|
COLR pix; |
394 |
|
|
double z; |
395 |
|
|
{ |
396 |
|
|
register int x, y; |
397 |
|
|
/* make width and height positive */ |
398 |
|
|
if (width < 0) { |
399 |
|
|
width = -width; |
400 |
|
|
xstart = xstart-width+1; |
401 |
|
|
} else if (width == 0) |
402 |
|
|
width = 1; |
403 |
|
|
if (height < 0) { |
404 |
|
|
height = -height; |
405 |
|
|
ystart = ystart-height+1; |
406 |
|
|
} else if (height == 0) |
407 |
|
|
height = 1; |
408 |
|
|
/* fill pixel(s) within rectangle */ |
409 |
|
|
for (y = ystart; y < ystart+height; y++) |
410 |
|
|
for (x = xstart; x < xstart+width; x++) |
411 |
|
|
if (zscan(y)[x] <= 0 |
412 |
|
|
|| zscan(y)[x]-z > zeps*zscan(y)[x]) { |
413 |
|
|
zscan(y)[x] = z; |
414 |
|
|
copycolr(pscan(y)[x], pix); |
415 |
|
|
} |
416 |
|
|
} |
417 |
|
|
|
418 |
|
|
|
419 |
greg |
1.1 |
fillpicture() /* fill in empty spaces */ |
420 |
|
|
{ |
421 |
greg |
1.2 |
int *yback, xback; |
422 |
greg |
1.1 |
int y; |
423 |
greg |
1.2 |
COLR pfill; |
424 |
|
|
register int x, i; |
425 |
|
|
/* get back buffer */ |
426 |
|
|
yback = (int *)malloc(ourview.hresolu*sizeof(int)); |
427 |
|
|
if (yback == NULL) { |
428 |
|
|
perror(progname); |
429 |
|
|
return; |
430 |
|
|
} |
431 |
|
|
for (x = 0; x < ourview.hresolu; x++) |
432 |
greg |
1.4 |
yback[x] = -2; |
433 |
greg |
1.7 |
/* |
434 |
|
|
* Xback and yback are the pixel locations of suitable |
435 |
|
|
* background values in each direction. |
436 |
|
|
* A value of -2 means unassigned, and -1 means |
437 |
|
|
* that there is no suitable background in this direction. |
438 |
|
|
*/ |
439 |
greg |
1.2 |
/* fill image */ |
440 |
greg |
1.4 |
for (y = 0; y < ourview.vresolu; y++) { |
441 |
|
|
xback = -2; |
442 |
greg |
1.1 |
for (x = 0; x < ourview.hresolu; x++) |
443 |
greg |
1.8 |
if (zscan(y)[x] <= 0) { /* empty pixel */ |
444 |
greg |
1.7 |
/* |
445 |
|
|
* First, find background from above or below. |
446 |
|
|
* (farthest assigned pixel) |
447 |
|
|
*/ |
448 |
greg |
1.4 |
if (yback[x] == -2) { |
449 |
|
|
for (i = y+1; i < ourview.vresolu; i++) |
450 |
greg |
1.8 |
if (zscan(i)[x] > 0) |
451 |
greg |
1.4 |
break; |
452 |
|
|
if (i < ourview.vresolu |
453 |
greg |
1.2 |
&& (y <= 0 || zscan(y-1)[x] < zscan(i)[x])) |
454 |
greg |
1.4 |
yback[x] = i; |
455 |
|
|
else |
456 |
|
|
yback[x] = y-1; |
457 |
greg |
1.2 |
} |
458 |
greg |
1.7 |
/* |
459 |
|
|
* Next, find background from left or right. |
460 |
|
|
*/ |
461 |
greg |
1.4 |
if (xback == -2) { |
462 |
greg |
1.11 |
for (i = x+1; i < ourview.hresolu; i++) |
463 |
greg |
1.8 |
if (zscan(y)[i] > 0) |
464 |
greg |
1.4 |
break; |
465 |
|
|
if (i < ourview.hresolu |
466 |
|
|
&& (x <= 0 || zscan(y)[x-1] < zscan(y)[i])) |
467 |
|
|
xback = i; |
468 |
|
|
else |
469 |
|
|
xback = x-1; |
470 |
|
|
} |
471 |
greg |
1.7 |
/* |
472 |
greg |
1.11 |
* Check to see if we have no background for |
473 |
|
|
* this pixel. If not, use background color. |
474 |
|
|
*/ |
475 |
|
|
if (xback < 0 && yback[x] < 0) { |
476 |
|
|
copycolr(pscan(y)[x], backcolr); |
477 |
|
|
continue; |
478 |
|
|
} |
479 |
|
|
/* |
480 |
greg |
1.7 |
* Compare, and use the background that is |
481 |
|
|
* farther, unless one of them is next to us. |
482 |
|
|
*/ |
483 |
greg |
1.11 |
if ( yback[x] < 0 |
484 |
|
|
|| (xback >= 0 && ABS(x-xback) <= 1) |
485 |
greg |
1.4 |
|| ( ABS(y-yback[x]) > 1 |
486 |
greg |
1.11 |
&& zscan(yback[x])[x] |
487 |
|
|
< zscan(y)[xback] ) ) |
488 |
greg |
1.4 |
copycolr(pscan(y)[x],pscan(y)[xback]); |
489 |
|
|
else |
490 |
|
|
copycolr(pscan(y)[x],pscan(yback[x])[x]); |
491 |
|
|
} else { /* full pixel */ |
492 |
|
|
yback[x] = -2; |
493 |
|
|
xback = -2; |
494 |
|
|
} |
495 |
|
|
} |
496 |
greg |
1.2 |
free((char *)yback); |
497 |
greg |
1.1 |
} |
498 |
|
|
|
499 |
|
|
|
500 |
greg |
1.11 |
backpicture() /* paint in empty pixels */ |
501 |
|
|
{ |
502 |
|
|
register int x, y; |
503 |
|
|
|
504 |
|
|
for (y = 0; y < ourview.vresolu; y++) |
505 |
|
|
for (x = 0; x < ourview.hresolu; x++) |
506 |
|
|
if (zscan(y)[x] <= 0) |
507 |
|
|
copycolr(pscan(y)[x], backcolr); |
508 |
|
|
} |
509 |
|
|
|
510 |
|
|
|
511 |
greg |
1.1 |
writepicture() /* write out picture */ |
512 |
|
|
{ |
513 |
|
|
int y; |
514 |
|
|
|
515 |
|
|
fputresolu(YMAJOR|YDECR, ourview.hresolu, ourview.vresolu, stdout); |
516 |
|
|
for (y = ourview.vresolu-1; y >= 0; y--) |
517 |
|
|
if (fwritecolrs(pscan(y), ourview.hresolu, stdout) < 0) { |
518 |
|
|
perror(progname); |
519 |
|
|
exit(1); |
520 |
|
|
} |
521 |
greg |
1.11 |
} |
522 |
|
|
|
523 |
|
|
|
524 |
|
|
writedistance(fname) /* write out z file */ |
525 |
|
|
char *fname; |
526 |
|
|
{ |
527 |
|
|
extern double sqrt(); |
528 |
|
|
int donorm = normdist && ourview.type == VT_PER; |
529 |
|
|
FILE *fp; |
530 |
|
|
int y; |
531 |
|
|
float *zout; |
532 |
|
|
|
533 |
|
|
if ((fp = fopen(fname, "w")) == NULL) { |
534 |
|
|
perror(fname); |
535 |
|
|
exit(1); |
536 |
|
|
} |
537 |
|
|
if (donorm |
538 |
|
|
&& (zout = (float *)malloc(ourview.hresolu*sizeof(float))) == NULL) { |
539 |
|
|
perror(progname); |
540 |
|
|
exit(1); |
541 |
|
|
} |
542 |
|
|
for (y = ourview.vresolu-1; y >= 0; y--) { |
543 |
|
|
if (donorm) { |
544 |
|
|
double vx, yzn2; |
545 |
|
|
register int x; |
546 |
|
|
yzn2 = y - .5*(ourview.vresolu-1); |
547 |
|
|
yzn2 = 1. + yzn2*yzn2*ourview.vvn2; |
548 |
|
|
for (x = 0; x < ourview.hresolu; x++) { |
549 |
|
|
vx = x - .5*(ourview.hresolu-1); |
550 |
|
|
zout[x] = zscan(y)[x] |
551 |
|
|
* sqrt(vx*vx*ourview.vhn2 + yzn2); |
552 |
|
|
} |
553 |
|
|
} else |
554 |
|
|
zout = zscan(y); |
555 |
|
|
if (fwrite(zout, sizeof(float), ourview.hresolu, fp) |
556 |
|
|
< ourview.hresolu) { |
557 |
|
|
perror(fname); |
558 |
|
|
exit(1); |
559 |
|
|
} |
560 |
|
|
} |
561 |
|
|
if (donorm) |
562 |
|
|
free((char *)zout); |
563 |
|
|
fclose(fp); |
564 |
greg |
1.10 |
} |
565 |
|
|
|
566 |
|
|
|
567 |
|
|
isfloat(s) /* see if string is floating number */ |
568 |
|
|
register char *s; |
569 |
|
|
{ |
570 |
|
|
for ( ; *s; s++) |
571 |
|
|
if ((*s < '0' || *s > '9') && *s != '.' && *s != '-' |
572 |
|
|
&& *s != 'e' && *s != 'E' && *s != '+') |
573 |
|
|
return(0); |
574 |
|
|
return(1); |
575 |
greg |
1.1 |
} |