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greg |
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/* Copyright (c) 1994 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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/* |
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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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VIEW leftview = STDVIEW; |
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VIEW rightview; |
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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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int gotview = 0; |
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double dist; |
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FVECT v1; |
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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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if (isview(linebuf) && sscanview(&leftview, linebuf) > 0) |
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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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fcross(v1, leftview.vdir, leftview.vup); |
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if (normalize(v1) == 0.) { |
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fprintf(stderr, |
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"%s: view direction parallel to view up vector\n", |
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progname); |
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exit(1); |
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} |
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copystruct(&rightview, &leftview); |
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dist = atof(argv[1]); |
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for (i = 0; i < 3; i++) |
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rightview.vp[i] += dist*v1[i]; |
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fputs(VIEWSTR, stdout); |
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fprintview(&rightview, stdout); |
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putchar('\n'); |
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exit(0); |
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} |
