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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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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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 "view.h" |
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VIEW leftview = STDVIEW; |
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#include <ctype.h> |
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|
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VIEW rightview; |
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VIEW vw = STDVIEW; |
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char *progname; |
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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char linebuf[256]; |
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char *err; |
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int gotview = 0; |
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FVECT hvn, vvn; |
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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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++argv; --argc; |
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while (argc && argv[0][0] == '-' && argv[0][1] == 'v') { |
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int rv; |
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if (argc > 2 && argv[0][2] == 'f') { |
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rv = viewfile(argv[1], &vw, NULL); |
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if (rv <= 0) { |
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fprintf(stderr, "%s: %s file '%s'\n", |
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progname, |
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rv < 0 ? "cannot open view" : |
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"no view in", argv[1]); |
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exit(1); |
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} |
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++gotview; |
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++argv; --argc; |
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} else { |
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rv = getviewopt(&vw, argc, argv); |
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if (rv < 0) { |
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fprintf(stderr, "%s: bad view option at '%s'\n", |
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progname, argv[0]); |
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exit(1); |
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} |
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++gotview; |
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argv += rv; argc -= rv; |
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} |
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++argv; --argc; |
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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 (argc != 1) |
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goto userr; |
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if (!gotview) |
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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(&vw, 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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if ((err= setview(&vw)) != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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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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VCOPY(hvn, vw.hvec); |
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normalize(hvn); |
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VCOPY(vvn, vw.vvec); |
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normalize(vvn); |
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if (isalpha(argv[0][0])) { /* print out variables */ |
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switch (vw.type) { |
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case VT_PER: i=1; break; |
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case VT_PAR: i=2; break; |
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case VT_ANG: i=3; break; |
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case VT_HEM: i=4; break; |
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case VT_CYL: i=5; break; |
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case VT_PLS: i=6; break; |
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default: i=0; break; |
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} |
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printf("%st:%d;", argv[0], i); |
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printf("%spx:%g;%spy:%g;%spz:%g;", argv[0], vw.vp[0], |
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argv[0], vw.vp[1], argv[0], vw.vp[2]); |
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printf("%sdx:%g;%sdy:%g;%sdz:%g;", argv[0], vw.vdir[0], |
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argv[0], vw.vdir[1], argv[0], vw.vdir[2]); |
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printf("%sd:%g;", argv[0], vw.vdist); |
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printf("%sux:%g;%suy:%g;%suz:%g;", argv[0], vw.vup[0], |
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argv[0], vw.vup[1], argv[0], vw.vup[2]); |
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printf("%sh:%g;%sv:%g;", argv[0], vw.horiz, |
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argv[0], vw.vert); |
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printf("%ss:%g;%sl:%g;%so:%g;%sa:%g;", |
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argv[0], vw.hoff, argv[0], vw.voff, |
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argv[0], vw.vfore, argv[0], vw.vaft); |
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printf("%shx:%g;%shy:%g;%shz:%g;%shn:%g;", |
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argv[0], hvn[0], argv[0], hvn[1], |
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argv[0], hvn[2], argv[0], sqrt(vw.hn2)); |
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printf("%svx:%g;%svy:%g;%svz:%g;%svn:%g;\n", |
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argv[0], vvn[0], argv[0], vvn[1], |
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argv[0], vvn[2], argv[0], sqrt(vw.vn2)); |
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exit(0); |
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} |
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if (!isflt(argv[0])) |
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goto userr; |
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dist = atof(argv[0]); |
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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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vw.vp[i] += dist*hvn[i]; |
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fprintview(&vw, stdout); |
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putchar('\n'); |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s {offset|name}\n", progname); |
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exit(1); |
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} |
