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#ifndef lint |
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static const char RCSid[] = "$Id: plotin.c,v 1.1 2003/02/22 02:07:26 greg Exp $"; |
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#endif |
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/* |
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* Program to convert plot(5) files to metafiles |
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* |
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* cc -o plotin plotin.c primout.o mfio.o syscalls.o misc.o -lm |
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* |
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* 5/20/85 |
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*/ |
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|
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#include <string.h> |
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|
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#include "meta.h" |
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#include "plot.h" |
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|
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#define getsi(f, m) ICONV(geti(f)-(m), size) |
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|
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|
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|
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char *progname; |
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|
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static int xmin = 0, ymin = 0, /* current space settings */ |
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size = XYSIZE; |
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|
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static int curx = -1, /* current position */ |
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cury = -1; |
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|
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static short curmod = 0; /* current line drawing mode */ |
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|
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static void convert(FILE *infp); |
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static int geti(FILE *fp); |
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static int quadr(int x, int y, int xp, int yp); |
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static void step(int d); |
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|
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static void linemod(char s[]); |
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static void erase(void); |
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static void space(int xmn, int ymn, int xmx, int ymx); |
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static void move(int x, int y); |
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static void cont(int x, int y); |
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static void line(int x0, int y0, int x1, int y1); |
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static void label(register char *s); |
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static void point(int x, int y); |
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static void arc(int x, int y, int x0, int y0, int x1, int y1); |
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static void circle(int x, int y, int r); |
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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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FILE *fp; |
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|
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progname = *argv++; |
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argc--; |
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|
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while (argc && **argv == '-') { |
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switch (*(*argv+1)) { |
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default: |
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error(WARNING, "unknown option"); |
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break; |
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} |
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argv++; |
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argc--; |
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} |
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|
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if (argc) |
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while (argc) { |
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fp = efopen(*argv, "r"); |
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convert(fp); |
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fclose(fp); |
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argv++; |
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argc--; |
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} |
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else |
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convert(stdin); |
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|
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pglob(PEOF, 0200, NULL); |
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|
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return(0); |
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} |
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|
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|
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|
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|
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void |
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convert( /* convert to meta-file */ |
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FILE *infp |
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) |
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{ |
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char *fgets(), sbuf[BUFSIZ]; |
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int command; |
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int a1, a2, a3, a4, a5, a6; |
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|
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while ((command = getc(infp)) != EOF) |
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switch (command) { |
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case 'm': |
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a1 = getsi(infp, xmin); |
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a2 = getsi(infp, ymin); |
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move(a1, a2); |
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break; |
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case 'n': |
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a1 = getsi(infp, xmin); |
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a2 = getsi(infp, ymin); |
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cont(a1, a2); |
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break; |
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case 'p': |
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a1 = getsi(infp, xmin); |
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a2 = getsi(infp, ymin); |
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point(a1, a2); |
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break; |
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case 'l': |
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a1 = getsi(infp, xmin); |
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a2 = getsi(infp, ymin); |
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a3 = getsi(infp, xmin); |
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a4 = getsi(infp, ymin); |
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line(a1, a2, a3, a4); |
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break; |
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case 't': |
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fgets(sbuf, sizeof(sbuf), infp); |
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sbuf[strlen(sbuf)-1] = '\0'; |
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label(sbuf); |
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break; |
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case 'a': |
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a1 = getsi(infp, xmin); |
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a2 = getsi(infp, ymin); |
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a3 = getsi(infp, xmin); |
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a4 = getsi(infp, ymin); |
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a5 = getsi(infp, xmin); |
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a6 = getsi(infp, ymin); |
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arc(a1, a2, a3, a4, a5, a6); |
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break; |
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case 'c': |
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a1 = getsi(infp, xmin); |
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a2 = getsi(infp, ymin); |
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a3 = getsi(infp, 0); |
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circle(a1, a2, a3); |
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break; |
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case 'e': |
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erase(); |
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break; |
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case 'f': |
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fgets(sbuf, sizeof(sbuf), infp); |
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linemod(sbuf); |
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break; |
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case 's': |
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a1 = geti(infp); |
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a2 = geti(infp); |
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a3 = geti(infp); |
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a4 = geti(infp); |
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space(a1, a2, a3, a4); |
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break; |
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default: |
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error(USER, "unknown command in convert"); |
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break; |
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} |
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} |
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|
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|
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|
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|
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int |
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geti( /* get two-byte integer from file */ |
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register FILE *fp |
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) |
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{ |
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register int i; |
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|
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i = getc(fp); |
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i |= getc(fp) << 8; |
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if (i & 0100000) |
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i |= ~0177777; /* manual sign extend */ |
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if (feof(fp)) |
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error(USER, "unexpected end of file in geti"); |
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|
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return(i); |
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} |
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|
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|
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|
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void |
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move( /* move to new position */ |
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register int x, |
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register int y |
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) |
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{ |
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curx = x; |
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cury = y; |
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} |
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|
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|
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|
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void |
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cont( /* draw line to point */ |
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register int x, |
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register int y |
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) |
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{ |
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plseg(curmod, curx, cury, x, y); |
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curx = x; |
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cury = y; |
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} |
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|
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|
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void |
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point( /* draw a point */ |
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register int x, |
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register int y |
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) |
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{ |
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plseg(0, x, y, x, y); |
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curx = x; |
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cury = y; |
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} |
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|
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|
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|
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void |
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line( /* draw a line segment */ |
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int x0, |
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int y0, |
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int x1, |
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int y1 |
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) |
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{ |
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move(x0, y0); |
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cont(x1, y1); |
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} |
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|
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|
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void |
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label( /* print a label */ |
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register char *s |
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) |
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{ |
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pprim(PMSTR, 0, curx, cury, curx, cury, s); |
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} |
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|
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|
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|
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static int del = 100; |
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|
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void |
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step( |
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int d |
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) |
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{ |
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del = d; |
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} |
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|
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void |
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arc( |
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int x, |
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int y, |
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int x0, |
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int y0, |
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int x1, |
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int y1 |
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) |
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{ |
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double pc; |
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double sqrt(); |
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int flg,m,xc,yc,xs,ys,qs,qf; |
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float dx,dy,r; |
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char use; |
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dx = x-x0; |
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dy = y-y0; |
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r = dx*dx+dy*dy; |
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pc = r; |
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pc = sqrt(pc); |
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flg = pc/4; |
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if(flg == 0)step(1); |
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else if(flg < del)step(flg); |
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xc = xs = x0; |
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yc = ys = y0; |
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move(xs,ys); |
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if(x0 == x1 && y0 == y1)flg=0; |
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else flg=1; |
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qs = quadr(x,y,x0,y0); |
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qf = quadr(x,y,x1,y1); |
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if(abs(x-x1) < abs(y-y1)){ |
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use = 'x'; |
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if(qs == 2 || qs ==3)m = -1; |
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else m=1; |
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} |
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else { |
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use = 'y'; |
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if(qs > 2)m= -1; |
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else m= 1; |
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} |
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while(1){ |
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switch(use){ |
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case 'x': |
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if(qs == 2 || qs == 3)yc -= del; |
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else yc += del; |
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dy = yc-y; |
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pc = r-dy*dy; |
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xc = m*sqrt(pc)+x; |
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if((x < xs && x >= xc) || ( x > xs && x <= xc) || |
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(y < ys && y >= yc) || ( y > ys && y <= yc) ) |
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{ |
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if(++qs > 4)qs=1; |
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if(qs == 2 || qs == 3)m= -1; |
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else m=1; |
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flg=1; |
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} |
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cont(xc,yc); |
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xs = xc; |
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ys = yc; |
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if(qs == qf && flg == 1) |
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switch(qf){ |
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case 3: |
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case 4: |
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if(xs >= x1)return; |
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continue; |
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case 1: |
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case 2: |
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if(xs <= x1)return; |
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} |
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continue; |
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case 'y': |
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if(qs > 2)xc += del; |
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else xc -= del; |
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dx = xc-x; |
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pc = r-dx*dx; |
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yc = m*sqrt(pc)+y; |
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if((x < xs && x >= xc) || ( x > xs && x <= xc ) || |
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(y < ys && y >= yc) || (y > ys && y <= yc) ) |
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{ |
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if(++qs > 4)qs=1; |
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if(qs > 2)m = -1; |
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else m = 1; |
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flg=1; |
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} |
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cont(xc,yc); |
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xs = xc; |
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ys = yc; |
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if(qs == qf && flg == 1) |
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switch(qs){ |
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case 1: |
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case 4: |
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if(ys >= y1)return; |
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continue; |
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case 2: |
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case 3: |
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if(ys <= y1)return; |
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} |
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} |
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} |
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} |
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|
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int |
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quadr( |
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int x, |
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int y, |
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int xp, |
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int yp |
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) |
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{ |
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if(x < xp) |
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if(y <= yp)return(1); |
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else return(4); |
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else if(x > xp) |
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if(y < yp)return(2); |
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else return(3); |
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else if(y < yp)return(2); |
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else return(4); |
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} |
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|
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|
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void |
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circle( |
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int x, |
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int y, |
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int r |
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) |
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{ |
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arc(x,y,x+r,y,x+r,y); |
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} |
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|
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|
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|
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void |
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erase(void) /* erase plot */ |
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{ |
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pglob(PEOP, 0200, NULL); |
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} |
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|
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|
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void |
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linemod( /* set line mode according to s */ |
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char s[] |
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) |
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{ |
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switch (s[2]) { |
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case 'l': /* solid */ |
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curmod = 0; |
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break; |
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case 't': /* dotted */ |
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curmod = 1; |
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break; |
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case 'n': /* long dashed */ |
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curmod = 2; |
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break; |
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case 'o': /* short dashed (dot dashed) */ |
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curmod = 3; |
| 409 |
break; |
| 410 |
default: |
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error(WARNING, "unknown line mode in linemod"); |
| 412 |
break; |
| 413 |
} |
| 414 |
} |
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|
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|
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void |
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space( /* change space */ |
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int xmn, |
| 420 |
int ymn, |
| 421 |
int xmx, |
| 422 |
int ymx |
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) |
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{ |
| 425 |
if (xmn >= xmx || ymn >= ymx) |
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error(USER, "illegal space specification in space"); |
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|
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xmin = xmn; |
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ymin = ymn; |
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size = min(xmx-xmn, ymx-ymn); |
| 431 |
} |
