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/* Copyright (c) 1992 Regents of the University of California */ |
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/* Copyright (c) 1995 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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/* |
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* text.c - functions for text patterns and mixtures. |
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– |
* |
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* 11/12/86 |
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*/ |
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#include "ray.h" |
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* [spacing] |
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* |
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* Colortext is identical, except colors are given rather than |
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* brightnesses. Mixtext has foreground and background modifiers: |
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* brightnesses. |
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* |
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* Mixtext has foreground and background modifiers: |
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* |
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* modifier mixtext id |
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* 4+ foremod backmod fontfile text.. |
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* 0 |
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TLINE *tlalloc(); |
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text(m, r) |
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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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{ |
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objerror(m, USER, "inappropriate modifier"); |
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return(1); |
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} |
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} |
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if (m->otype == PAT_BTEXT) { |
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} else if (m->otype == PAT_BTEXT) { |
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if (foreground) |
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scalecolor(r->pcol, m->oargs.farg[9]); |
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else |
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/* compute vectors */ |
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fcross(DxR, D, R); |
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fcross(t->right, DxR, D); |
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d = DOT(D,D)/DOT(t->right,t->right); |
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d = DOT(t->right,t->right); |
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if (d <= 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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t->right[i] *= d; |
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fcross(t->down, R, DxR); |
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/* compute character spacing */ |
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i = sndx(tm); |
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d = i < tm->oargs.nfargs ? tm->oargs.farg[i] : 0.0; |
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i = d * 256.0; |
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i = d * 255.0; |
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t->tl.width = 0; |
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for (tlp = t->tl.next; tlp != NULL; tlp = tlp->next) { |
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if (i < 0) |
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x = DOT(v, tp->right); |
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i = sndx(m); |
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if (i < m->oargs.nfargs) |
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x *= tp->f->mwidth + 256.*fabs(m->oargs.farg[i]); |
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x *= tp->f->mwidth + 255.*fabs(m->oargs.farg[i]); |
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else |
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x *= 256.; |
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x *= 255.; |
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h = x; |
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i = y = DOT(v, tp->down); |
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if (x < 0.0 || y < 0.0) |
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return(0); |
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x -= (double)h; |
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y = ((i+1) - y)*256.; |
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y = ((i+1) - y)*255.; |
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/* find the line position */ |
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for (tlp = tp->tl.next; tlp != NULL; tlp = tlp->next) |
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if (--i < 0) |
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if (tlp == NULL || h >= tlp->width) |
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return(0); |
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for (i = 0; (h -= tlp->spc[i]) >= 0; i++) |
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if (h < 256 && inglyph(h+x, y, |
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if (h < 255 && inglyph(h+x, y, |
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tp->f->fg[TLSTR(tlp)[i]&0xff])) |
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return(1); |
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return(0); |
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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 [0,256) */ |
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double x, y; /* real coordinates in range [0,255) */ |
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register GLYPH *gl; |
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{ |
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int n, ncross; |
