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greg |
2.2 |
/* Copyright (c) 1995 Regents of the University of California */
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greg |
2.1 |
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* Move a viewpoint the given distance to the right
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*/
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#include "standard.h"
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#include "view.h"
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greg |
2.2 |
VIEW vw = STDVIEW;
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greg |
2.1 |
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char *progname;
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char linebuf[256];
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greg |
2.2 |
char *err;
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greg |
2.1 |
int gotview = 0;
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double dist;
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register int i;
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progname = argv[0];
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if (argc != 2 || !isflt(argv[1])) {
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fprintf(stderr, "Usage: %s offset\n", progname);
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exit(1);
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}
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while (fgets(linebuf, sizeof(linebuf), stdin) != NULL) {
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if (linebuf[0] == '\n')
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break;
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greg |
2.2 |
if (isview(linebuf) && sscanview(&vw, linebuf) > 0)
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greg |
2.1 |
gotview++;
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}
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if (!gotview) {
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fprintf(stderr, "%s: no view on standard input\n", progname);
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exit(1);
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}
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greg |
2.2 |
if ((err= setview(&vw)) != NULL) {
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fprintf(stderr, "%s: %s\n", progname, err);
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greg |
2.1 |
exit(1);
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}
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greg |
2.2 |
dist = atof(argv[1])/sqrt(vw.hn2);
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greg |
2.1 |
for (i = 0; i < 3; i++)
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greg |
2.2 |
vw.vp[i] += dist*vw.hvec[i];
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greg |
2.1 |
fputs(VIEWSTR, stdout);
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greg |
2.2 |
fprintview(&vw, stdout);
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greg |
2.1 |
putchar('\n');
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exit(0);
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}
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