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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* text.c - functions for text patterns and mixtures. |
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*/ |
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#include "ray.h" |
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#include "copyright.h" |
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#include "ray.h" |
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#include "paths.h" |
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#include "otypes.h" |
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#include "rtotypes.h" |
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#include "font.h" |
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/* |
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TLINE tl; /* line list */ |
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} TEXT; |
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extern char *getlibpath(); |
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static TLINE * tlalloc(char *s); |
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static TEXT * gettext(OBJREC *tm); |
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static int intext(FVECT p, OBJREC *m); |
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static int inglyph(double x, double y, GLYPH *gl); |
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extern char *fgetword(); |
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TEXT *gettext(); |
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TLINE *tlalloc(); |
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do_text(m, r) |
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register OBJREC *m; |
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RAY *r; |
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int |
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do_text( |
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OBJREC *m, |
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RAY *r |
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) |
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{ |
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FVECT v; |
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int foreground; |
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} |
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TLINE * |
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tlalloc(s) /* allocate and assign text line */ |
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char *s; |
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static TLINE * |
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tlalloc( /* allocate and assign text line */ |
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char *s |
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) |
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{ |
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extern char *strcpy(); |
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register int siz; |
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register TLINE *tl; |
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int siz; |
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TLINE *tl; |
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siz = strlen(s) + 1; |
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if ((tl=(TLINE *)malloc(sizeof(TLINE)+siz)) == NULL || |
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} |
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TEXT * |
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gettext(tm) /* get text structure for material */ |
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register OBJREC *tm; |
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static TEXT * |
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gettext( /* get text structure for material */ |
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OBJREC *tm |
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) |
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{ |
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#define R (tm->oargs.farg+3) |
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#define D (tm->oargs.farg+6) |
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extern char *strcpy(); |
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FVECT DxR; |
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double d; |
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FILE *fp; |
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char linbuf[512]; |
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TEXT *t; |
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register int i; |
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register TLINE *tlp; |
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register char *s; |
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int i; |
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TLINE *tlp; |
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char *s; |
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if ((t = (TEXT *)tm->os) != NULL) |
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return(t); |
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fcross(DxR, D, R); |
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fcross(t->right, DxR, D); |
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d = DOT(t->right,t->right); |
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if (d <= FTINY*FTINY) |
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if (d <= FTINY*FTINY*FTINY*FTINY) |
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objerror(tm, USER, "illegal motion vector"); |
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d = DOT(D,D)/d; |
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for (i = 0; i < 3; i++) |
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tlp = tlp->next; |
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} else { /* text file */ |
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if ((s = getpath(tm->oargs.sarg[tndx(tm)], |
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getlibpath(), R_OK)) == NULL) { |
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getrlibpath(), R_OK)) == NULL) { |
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sprintf(errmsg, "cannot find text file \"%s\"", |
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tm->oargs.sarg[tndx(tm)]); |
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error(USER, errmsg); |
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error(SYSTEM, errmsg); |
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} |
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if ((fp = fopen(s, "r")) == NULL) { |
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sprintf(errmsg, "cannot open text file \"%s\"", s); |
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} |
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freetext(m) /* free text structures associated with m */ |
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OBJREC *m; |
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void |
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freetext( /* free text structures associated with m */ |
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OBJREC *m |
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) |
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{ |
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register TEXT *tp; |
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register TLINE *tlp; |
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TEXT *tp; |
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TLINE *tlp; |
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tp = (TEXT *)m->os; |
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if (tp == NULL) |
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return; |
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while ((tlp = tp->tl.next) != NULL) { |
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tp->tl.next = tlp->next; |
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free((char *)tlp->spc); |
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free((char *)tlp); |
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free((void *)tlp->spc); |
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free((void *)tlp); |
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} |
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free((char *)tp); |
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freefont(tp->f); /* release font reference */ |
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free((void *)tp); |
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m->os = NULL; |
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} |
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intext(p, m) /* check to see if p is in text glyph */ |
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FVECT p; |
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OBJREC *m; |
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static int |
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intext( /* check to see if p is in text glyph */ |
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FVECT p, |
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OBJREC *m |
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) |
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{ |
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register TEXT *tp; |
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register TLINE *tlp; |
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TEXT *tp; |
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TLINE *tlp; |
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FVECT v; |
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double y, x; |
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register int i, h; |
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int i, h; |
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/* first, compute position in text */ |
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tp = gettext(m); |
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v[0] = p[0] - m->oargs.farg[0]; |
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} |
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inglyph(x, y, gl) /* (x,y) within font glyph gl? */ |
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double x, y; /* real coordinates in range [0,255) */ |
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register GLYPH *gl; |
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static int |
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inglyph( /* (x,y) within font glyph gl? */ |
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double x, /* real coordinates in range [0,255) */ |
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double y, |
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GLYPH *gl |
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) |
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{ |
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int n, ncross; |
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int xlb, ylb; |
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int tv; |
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register GORD *p0, *p1; |
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GORD *p0, *p1; |
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if (gl == NULL) |
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return(0); |
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/* positive x axis cross test */ |
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while (n--) { |
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if ((p0[1]<<1 > ylb) ^ (p1[1]<<1 > ylb)) { |
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tv = p0[0]<<1 > xlb | (p1[0]<<1 > xlb) << 1; |
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tv = (p0[0]<<1 > xlb) | ((p1[0]<<1 > xlb) << 1); |
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if (tv == 03) |
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ncross++; |
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else if (tv) |
