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#ifndef lint |
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static const char RCSid[] = "$Id: vwright.c,v 2.10 2018/03/19 16:35:19 greg Exp $"; |
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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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|
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|
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#include "standard.h" |
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|
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#include "view.h" |
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|
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#include <ctype.h> |
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|
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VIEW vw = STDVIEW; |
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|
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|
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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 *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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int i; |
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|
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fixargv0(argv[0]); /* sets global progname */ |
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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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if (argc != 1) |
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goto userr; |
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if (!gotview) { |
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gotview = viewfile(NULL, &vw, NULL); |
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if (gotview <= 0) { |
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fprintf(stderr, "%s: no view on standard input\n", |
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progname); |
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exit(1); |
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} |
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} |
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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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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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VSUM(vw.vp, vw.vp, hvn, dist); |
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fprintview(&vw, stdout); |
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fputc('\n', stdout); |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s [view options] {offset|name}\n", progname); |
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exit(1); |
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} |
