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- /* writemif.c - routines to output FrameMaker MIF format
- * - using TTDDDLIB by Glenn M. Lewis - 7/24/91
- */
-
- static char rcs_id[] = "$Id: writemif.c,v 1.9 1993/01/30 12:55:49 glewis Exp $";
-
- #include <stdio.h>
- #include "t3dlib.h"
- #ifdef __STDC__
- #include <stdlib.h>
- #include <strings.h>
- #include "writemif_protos.h"
- #endif
-
- /* double XSIZE = 8.5; - in the PostScript module */
- /* double YSIZE = 11.0; - in the PostScript module */
- #define MARGIN (0.25) /* On each side of the page */
- #define PPI (72.0)
- #define COS60 (0.5)
- #define COS30 (0.8660)
-
- static void write_MIF_header();
- static void draw_MIF_view();
- static void render_MIF_object();
-
- static FILE *out;
- static WORLD *world;
- static MBB mbb;
- static double xsize, ysize;
- static int view;
- static double xoffset, yoffset, scale, ybottom;
-
- static int tab;
- static void dotab() { register int i=tab; while (i--) fputc(' ',out); }
- #define TAB(a) {dotab();fputs(a,out);}
- #define TABr(a) {dotab();fputs(a,out);tab++;}
- #define TABl(a) {tab--;dotab();fputs(a,out);}
- #define PTAB dotab();fprintf
-
- int write_MIF(object, file, selected_view)
- WORLD *object;
- FILE *file;
- int selected_view;
- {
- double llx, lly;
- register OBJECT *obj;
- if (!(out = file)) return(0); /* File not open */
- if (!(world = object)) return(0); /* No object */
-
- /* Determine the extent of the world object */
- mbb.minx = mbb.miny = mbb.minz = 1.0e10;
- mbb.maxx = mbb.maxy = mbb.maxz = -1.0e10;
- for (obj=world->object; obj; obj=obj->next) {
- calculate_MBB(obj);
- if (!obj->user) continue;
- if (((MBB*)obj->user)->minx<mbb.minx) mbb.minx = ((MBB*)obj->user)->minx;
- if (((MBB*)obj->user)->miny<mbb.miny) mbb.miny = ((MBB*)obj->user)->miny;
- if (((MBB*)obj->user)->minz<mbb.minz) mbb.minz = ((MBB*)obj->user)->minz;
- if (((MBB*)obj->user)->maxx>mbb.maxx) mbb.maxx = ((MBB*)obj->user)->maxx;
- if (((MBB*)obj->user)->maxy>mbb.maxy) mbb.maxy = ((MBB*)obj->user)->maxy;
- if (((MBB*)obj->user)->maxz>mbb.maxz) mbb.maxz = ((MBB*)obj->user)->maxz;
- }
- #ifdef DEBUG
- fprintf(stderr, "MBB: (%.12g,%.12g,%.12g)-(%.12g,%.12g,%.12g)\n",
- mbb.minx, mbb.miny, mbb.minz,
- mbb.maxx, mbb.maxy, mbb.maxz);
- #endif
-
- write_MIF_header();
- if (selected_view==VIEW_ALL_FOUR) {
- for (view=0; view<4; view++) {
- llx = ((view&0x02) ? XSIZE/2.0 : MARGIN) * PPI;
- lly = ((view&0x01) ? YSIZE/2.0 : MARGIN) * PPI;
- xsize = PPI*(XSIZE/2.0 - MARGIN);
- ysize = PPI*(YSIZE/2.0 - MARGIN);
- TABr("<Frame\n");
- TAB("<Pen 0>\n");
- TAB("<Fill 15>\n");
- TAB("<PenWidth 0.1 pt>\n");
- TAB("<Separation 0>\n");
- PTAB(out, "<BRect %.12g %.12g %.12g %.12g>\n", llx, lly, xsize, ysize);
- draw_MIF_view();
- TABl("> # end of Frame\n");
- }
- } else {
- xsize = PPI*(XSIZE - 2.0*MARGIN);
- ysize = PPI*(YSIZE - 2.0*MARGIN);
- view=selected_view;
- TABr("<Frame\n");
- TAB("<Pen 0>\n");
- TAB("<Fill 15>\n");
- TAB("<PenWidth 0.1 pt>\n");
- TAB("<Separation 0>\n");
- PTAB(out, "<BRect %.12g %.12g %.12g %.12g>\n", PPI*MARGIN, PPI*MARGIN, xsize, ysize);
- draw_MIF_view();
- TABl("> # end of Frame\n");
- }
- return(1);
- }
-
- static void write_MIF_header()
- {
- tab=0;
- fputs("<MIFFile 2.00>\t# Created by TTDDDLIB by Glenn M. Lewis\n", out);
- fprintf(out, "# %s\n", rcs_id);
- fputs("\n<Document\n <DPageRounding DeleteEmptyPages>\n", out);
- fputs(" <DSmartQuotesOn Yes>\n <DBordersOn Yes>\n <DGridOn Yes>\n", out);
- fputs(" <DRulersOn Yes>\n <DSymbolsOn No>\n> # end of Document\n", out);
- fputs("<Units Upt>\n", out);
- }
-
- static void draw_MIF_view()
- {
- double xratio, yratio, zratio, ratio;
- OBJECT *obj;
-
- if (mbb.maxx-mbb.minx>0.0) xratio=1.0/(mbb.maxx-mbb.minx); else xratio=1.0;
- if (mbb.maxy-mbb.miny>0.0) yratio=1.0/(mbb.maxy-mbb.miny); else yratio=1.0;
- if (mbb.maxz-mbb.minz>0.0) zratio=1.0/(mbb.maxz-mbb.minz); else zratio=1.0;
- ratio = (xratio < yratio ? xratio : yratio); /* Get minimum ratio */
- ratio = (ratio < zratio ? ratio : zratio);
-
- scale = (xsize < ysize ? xsize : ysize)*ratio; /* Keep aspect ratio same */
-
- switch(view) {
- case VIEW_TOP:
- xoffset = (xsize-scale/xratio)/2.0;
- yoffset = (ysize-scale/yratio)/2.0;
- break;
- case VIEW_FRONT:
- xoffset = (xsize-scale/xratio)/2.0;
- yoffset = (ysize-scale/zratio)/2.0;
- break;
- case VIEW_ISO:
- xratio = (mbb.maxx-mbb.minx)*COS30+(mbb.maxy-mbb.miny)*COS30;
- if (xratio>0.0) xratio = 1.0/xratio; else xratio=1.0;
- ybottom = -(mbb.maxx-mbb.minx)*COS60;
- yratio = (mbb.maxz-mbb.minz)+(mbb.maxy-mbb.miny)*COS60 /* Top */
- - ybottom;
- if (yratio>0.0) yratio = 1.0/yratio; else yratio=1.0;
- ratio = (xratio < yratio ? xratio : yratio);
- scale = (xsize < ysize ? xsize : ysize)*ratio;
- xoffset = (xsize-scale/xratio)/2.0;
- yoffset = (ysize-scale/yratio)/2.0;
- break;
- case VIEW_RIGHT:
- xoffset = (xsize-scale/yratio)/2.0;
- yoffset = (ysize-scale/zratio)/2.0;
- break;
- }
- for (obj=world->object; obj; obj=obj->next)
- render_MIF_object(obj);
- }
-
- static void render_MIF_object(obj)
- register OBJECT *obj;
- {
- register UWORD *f;
- register OBJECT *op;
- register int i, j;
- int p[3];
- double x[3], y[3];
-
- if (!obj->desc) return;
- for (op=obj->child; op; op=op->next) /* render children first */
- render_MIF_object(op);
-
- /* Now, the meat... */
- #if 0
- if (obj->desc->shap && obj->desc->shap[1]!=0) return; /* A lamp */
- #endif
- if (!obj->desc->edge || !obj->desc->pnts || !obj->desc->face) return;
- for (f=obj->desc->face,i=obj->desc->fcount; i--; f+=3) {
- p[0] = obj->desc->edge[((*f)<<1)];
- p[1] = obj->desc->edge[((*f)<<1)+1];
- if (obj->desc->edge[((f[1])<<1)] == p[0] ||
- obj->desc->edge[((f[1])<<1)] == p[1])
- p[2] = obj->desc->edge[((f[1])<<1)+1];
- else
- p[2] = obj->desc->edge[((f[1])<<1)];
- switch(view) {
- case VIEW_TOP:
- for (j=3; j--; ) {
- x[j] = obj->desc->pnts[p[j]].x-mbb.minx;
- y[j] = obj->desc->pnts[p[j]].y-mbb.miny;
- }
- break;
- case VIEW_FRONT:
- for (j=3; j--; ) {
- x[j] = obj->desc->pnts[p[j]].x-mbb.minx;
- y[j] = obj->desc->pnts[p[j]].z-mbb.minz;
- }
- break;
- case VIEW_ISO:
- for (j=3; j--; ) {
- x[j] = (obj->desc->pnts[p[j]].x-mbb.minx)*COS30
- +(obj->desc->pnts[p[j]].y-mbb.miny)*COS30;
- y[j] = (obj->desc->pnts[p[j]].z-mbb.minz)
- -(obj->desc->pnts[p[j]].x-mbb.minx)*COS60
- +(obj->desc->pnts[p[j]].y-mbb.miny)*COS60
- - ybottom;
- }
- break;
- case VIEW_RIGHT:
- for (j=3; j--; ) {
- x[j] = obj->desc->pnts[p[j]].y-mbb.miny;
- y[j] = obj->desc->pnts[p[j]].z-mbb.minz;
- }
- break;
- }
- if (x[0]==x[1] && x[1]==x[2] && y[0]==y[1] && y[1]==y[2]) continue;
- TABr("<Polygon\n");
- PTAB(out, "<Point %0.2lf %0.2lf>\n", xoffset+scale*x[0],
- ysize-(yoffset+scale*y[0]));
- if (!(x[0]==x[1] && y[0]==y[1])) {
- PTAB(out, "<Point %0.2lf %0.2lf>\n", xoffset+scale*x[1],
- ysize-(yoffset+scale*y[1]));
- }
- if (!(x[0]==x[2] && y[0]==y[2]) && !(x[1]==x[2] && y[1]==y[2])) {
- PTAB(out, "<Point %0.2lf %0.2lf>\n", xoffset+scale*x[2],
- ysize-(yoffset+scale*y[2]));
- }
- TABl(">\n");
- }
- }
-
-