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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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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Convert MGF (Materials and Geometry Format) to Metafile 2-d graphics |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <math.h> |
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#include "meta.h" |
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#include "random.h" |
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#include "mgflib/parser.h" |
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#include "plocate.h" /* XXX shouldn't this rather be in rtmath.h? */ |
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#define MX(v) (int)(((1<<14)-1)*(v)[(proj_axis+1)%3]) |
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#define MY(v) (int)(((1<<14)-1)*(v)[(proj_axis+2)%3]) |
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#define MSIZE ((1<<14)-1) |
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#define MX(v) (int)(MSIZE*(v)[(proj_axis+1)%3]) |
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#define MY(v) (int)(MSIZE*(v)[(proj_axis+2)%3]) |
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int r_face(); |
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int proj_axis; |
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double limit[3][2]; |
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int layer; |
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long rthresh = 1; |
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extern int mg_nqcdivs; |
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static int r_face(int ac, char **av); |
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static void newlayer(void); |
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static int doline(int v1x, int v1y, int v2x, int v2y); |
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main(argc, argv) /* convert files to stdout */ |
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int argc; |
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char *argv[]; |
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int |
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main( /* convert files to stdout */ |
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int argc, |
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char *argv[] |
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) |
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{ |
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int i; |
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/* initialize dispatch table */ |
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mg_nqcdivs = 3; /* reduce object subdivision */ |
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mg_init(); /* initialize the parser */ |
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/* get arguments */ |
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if (argc > 9 && !strcmp(argv[1], "-t")) { |
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rthresh = atof(argv[2])*MSIZE + 0.5; |
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rthresh *= rthresh; |
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argv += 2; |
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argc -= 2; |
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} |
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if (argc < 8 || (proj_axis = argv[1][0]-'x') < 0 || proj_axis > 2) |
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goto userr; |
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limit[0][0] = atof(argv[2]); limit[0][1] = atof(argv[3]); |
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mdone(); /* close output */ |
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exit(0); |
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userr: |
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fprintf(stderr, "Usage: %s {x|y|z} xmin xmax ymin ymax zmin zmax [file.mgf] ..\n", |
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argv[0]); |
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fputs("Usage: mgf2meta [-t thresh] {x|y|z} xmin xmax ymin ymax zmin zmax [file.mgf] ..\n", |
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stderr); |
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exit(1); |
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} |
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int |
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r_face(ac, av) /* convert a face */ |
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int ac; |
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char **av; |
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r_face( /* convert a face */ |
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int ac, |
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char **av |
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) |
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{ |
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static FVECT bbmin = {0,0,0}, bbmax = {1,1,1}; |
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register int i, j; |
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#define hash(mx1,my1,mx2,my2) ((long)(mx1)<<15 ^ (long)(my1)<<10 ^ \ |
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(long)(mx2)<<5 ^ (long)(my2)) |
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#define RANDMASK ((1L<<14)-1) |
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newlayer() /* start a new layer */ |
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void |
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newlayer(void) /* start a new layer */ |
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{ |
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#ifdef BSD |
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bzero((char *)hshtab, sizeof(hshtab)); |
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#else |
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(void)memset((char *)hshtab, 0, sizeof(hshtab)); |
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#endif |
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(void)memset((char *)hshtab, '\0', sizeof(hshtab)); |
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if (++layer >= 16) { |
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mendpage(); |
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layer = 0; |
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int |
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doline(v1x, v1y, v2x, v2y) /* draw line conditionally */ |
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int v1x, v1y, v2x, v2y; |
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doline( /* draw line conditionally */ |
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int v1x, |
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int v1y, |
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int v2x, |
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int v2y |
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) |
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{ |
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register int h; |
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hshtab[h][0] = v1x; hshtab[h][1] = v1y; |
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hshtab[h][2] = v2x; hshtab[h][3] = v2y; |
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if ((long)(v2x-v1x)*(v2x-v1x) + (long)(v2y-v1y)*(v2y-v1y) |
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<= (random()&RANDMASK)) |
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<= random() % rthresh) |
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return(0); |
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mline(v1x, v1y, layer/4, 0, layer%4); |
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mdraw(v2x, v2y); |
