| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: replmarks.c,v 2.21 2025/04/23 01:57:04 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* Replace markers in Radiance scene description with objects or instances. |
| 6 |
* |
| 7 |
* Created: 17 Feb 1991 Greg Ward |
| 8 |
*/ |
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|
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#include <stdlib.h> |
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#include <ctype.h> |
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#include <math.h> |
| 13 |
#include <stdio.h> |
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|
| 15 |
#include "platform.h" |
| 16 |
#include "rtio.h" |
| 17 |
#include "paths.h" |
| 18 |
#include "fvect.h" |
| 19 |
|
| 20 |
#ifdef M_PI |
| 21 |
#define PI ((double)M_PI) |
| 22 |
#else |
| 23 |
#define PI 3.14159265358979323846 |
| 24 |
#endif |
| 25 |
|
| 26 |
#define MAXVERT 6 /* maximum number of vertices for markers */ |
| 27 |
#define MAXMARK 128 /* maximum number of markers */ |
| 28 |
|
| 29 |
#define USE_XFORM 1 /* use !xform inline command */ |
| 30 |
#define USE_INSTANCE 2 /* use instance primitive */ |
| 31 |
#define USE_MESH 3 /* use mesh primitive */ |
| 32 |
|
| 33 |
typedef struct { |
| 34 |
short beg, end; /* beginning and ending vertex */ |
| 35 |
float len2; /* length squared */ |
| 36 |
} EDGE; /* a marker edge */ |
| 37 |
|
| 38 |
struct mrkr { |
| 39 |
char *modout; /* output modifier */ |
| 40 |
double mscale; /* scale by this to get unit */ |
| 41 |
char *modin; /* input modifier indicating marker */ |
| 42 |
char *objname; /* output object file or octree */ |
| 43 |
int usetype; /* one of USE_* above */ |
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} marker[MAXMARK+1]; /* array of markers */ |
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int nmarkers = 0; /* number of markers */ |
| 46 |
|
| 47 |
int expand; /* expand commands? */ |
| 48 |
|
| 49 |
static void convert(char *name, FILE *fin); |
| 50 |
static void cvcomm(char *fname, FILE *fin); |
| 51 |
static void cvobject(char *fname, FILE *fin); |
| 52 |
static void replace(char *fname, struct mrkr *m, char *mark, FILE *fin); |
| 53 |
static int edgecmp(const void *e1, const void *e2); |
| 54 |
static int buildxf(char *xf, double markscale, FILE *fin); |
| 55 |
static int addrot(char *xf, FVECT xp, FVECT yp, FVECT zp); |
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|
| 57 |
|
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int |
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main( |
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int argc, |
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char *argv[] |
| 62 |
) |
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{ |
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FILE *fp; |
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int i, j; |
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|
| 67 |
fixargv0(argv[0]); /* sets global progname */ |
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i = 1; |
| 69 |
while (i < argc && argv[i][0] == '-') { |
| 70 |
do { |
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switch (argv[i][1]) { |
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case 'i': |
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marker[nmarkers].usetype = USE_INSTANCE; |
| 74 |
marker[nmarkers].objname = argv[++i]; |
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break; |
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case 'I': |
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marker[nmarkers].usetype = USE_MESH; |
| 78 |
marker[nmarkers].objname = argv[++i]; |
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break; |
| 80 |
case 'x': |
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marker[nmarkers].usetype = USE_XFORM; |
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marker[nmarkers].objname = argv[++i]; |
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break; |
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case 'e': |
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expand = 1; |
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break; |
| 87 |
case 'm': |
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marker[nmarkers].modout = argv[++i]; |
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break; |
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case 's': |
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marker[nmarkers].mscale = atof(argv[++i]); |
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break; |
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default: |
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goto userr; |
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} |
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if (++i >= argc) |
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goto userr; |
| 98 |
} while (argv[i][0] == '-'); |
| 99 |
if (marker[nmarkers].objname == NULL) |
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goto userr; |
| 101 |
if (nmarkers >= MAXMARK) { |
| 102 |
fprintf(stderr, "%s: too many markers\n", progname); |
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return 1; |
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} |
| 105 |
marker[nmarkers++].modin = argv[i++]; |
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marker[nmarkers].mscale = marker[nmarkers-1].mscale; |
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} |
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if (nmarkers == 0) |
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goto userr; |
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/* simple header */ |
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putchar('#'); |
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for (j = 0; j < i; j++) { |
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putchar(' '); |
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fputs(argv[j], stdout); |
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} |
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putchar('\n'); |
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if (i == argc) |
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convert("<stdin>", stdin); |
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else |
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for ( ; i < argc; i++) { |
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if ((fp = fopen(argv[i], "r")) == NULL) { |
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perror(argv[i]); |
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exit(1); |
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} |
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convert(argv[i], fp); |
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fclose(fp); |
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} |
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return 0; |
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userr: |
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fprintf(stderr, |
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"Usage: %s [-e][-s size][-m modout] {-x objfile|-i octree|-I mesh} modname .. [file ..]\n", |
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progname); |
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return 1; |
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} |
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|
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|
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void |
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convert( /* replace marks in a stream */ |
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char *name, |
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FILE *fin |
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) |
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{ |
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int c; |
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|
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while ((c = getc(fin)) != EOF) { |
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if (isspace(c)) /* blank */ |
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continue; |
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if (c == '#') { /* comment */ |
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putchar(c); |
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do { |
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if ((c = getc(fin)) == EOF) |
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return; |
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putchar(c); |
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} while (c != '\n'); |
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} else if (c == '!') { /* command */ |
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ungetc(c, fin); |
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cvcomm(name, fin); |
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} else { /* object */ |
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ungetc(c, fin); |
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cvobject(name, fin); |
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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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cvcomm( /* convert a command */ |
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char *fname, |
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FILE *fin |
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) |
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{ |
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FILE *pin; |
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char buf[512]; |
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|
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fgetline(buf, sizeof(buf), fin); |
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if (expand) { |
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if ((pin = popen(buf+1, "r")) == NULL) { |
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fprintf(stderr, |
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"%s: (%s): cannot execute \"%s\"\n", |
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progname, fname, buf); |
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exit(1); |
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} |
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convert(buf, pin); |
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if (pclose(pin) != 0) |
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fprintf(stderr, |
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"%s: (%s): warning - bad status from \"%s\"\n", |
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progname, fname, buf); |
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} else |
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printf("\n%s\n", buf); |
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} |
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|
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|
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void |
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cvobject( /* convert an object */ |
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char *fname, |
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FILE *fin |
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) |
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{ |
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char buf[128], typ[16], nam[128]; |
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int i, n; |
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int j; |
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|
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if (fgetword(buf, sizeof(buf), fin) == NULL || |
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fgetword(typ, sizeof(typ), fin) == NULL || |
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fgetword(nam, sizeof(nam), fin) == NULL) |
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goto readerr; |
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if (!strcmp(typ, "polygon")) |
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for (j = 0; j < nmarkers; j++) |
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if (!strcmp(buf, marker[j].modin)) { |
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replace(fname, &marker[j], nam, fin); |
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return; |
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} |
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putchar('\n'); fputword(buf, stdout); |
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printf(" %s ", typ); |
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fputword(nam, stdout); putchar('\n'); |
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if (!strcmp(typ, "alias")) { /* alias special case */ |
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if (fgetword(buf, sizeof(buf), fin) == NULL) |
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goto readerr; |
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putchar('\t'); fputword(buf, stdout); putchar('\n'); |
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return; |
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} |
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for (i = 0; i < 3; i++) { /* pass along arguments */ |
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if (fscanf(fin, "%d", &n) != 1) |
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goto readerr; |
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printf("%d", n); |
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for (j = 0; j < n; j++) { |
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if (fgetword(buf, sizeof(buf), fin) == NULL) |
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goto readerr; |
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if (j%3 == 0) |
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putchar('\n'); |
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putchar('\t'); |
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fputword(buf, stdout); |
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} |
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putchar('\n'); |
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} |
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return; |
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readerr: |
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fprintf(stderr, "%s: (%s): read error for %s \"%s\"\n", |
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progname, fname, typ, nam); |
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} |
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|
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|
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void |
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replace( /* replace marker */ |
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char *fname, |
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struct mrkr *m, |
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char *mark, |
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FILE *fin |
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) |
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{ |
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int n; |
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char buf[256]; |
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|
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buf[0] = '\0'; /* bug fix thanks to schorsch */ |
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if (m->usetype == USE_XFORM) { |
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sprintf(buf, "xform -n %s", mark); |
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if (m->modout != NULL) |
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sprintf(buf+strlen(buf), " -m %s", m->modout); |
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if (buildxf(buf+strlen(buf), m->mscale, fin) < 0) |
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goto badxf; |
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sprintf(buf+strlen(buf), " %s", m->objname); |
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if (expand) { |
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fflush(stdout); |
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system(buf); |
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} else |
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printf("\n!%s\n", buf); |
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} else { |
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if ((n = buildxf(buf, m->mscale, fin)) < 0) |
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goto badxf; |
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printf("\n%s %s %s\n", |
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m->modout==NULL?"void":m->modout, |
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m->usetype==USE_INSTANCE?"instance":"mesh", |
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mark); |
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printf("%d %s%s\n0\n0\n", n+1, m->objname, buf); |
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} |
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return; |
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badxf: |
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fprintf(stderr, "%s: (%s): bad arguments for marker \"%s\"\n", |
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progname, fname, mark); |
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exit(1); |
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} |
| 282 |
|
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|
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int |
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edgecmp( /* compare two edges, descending order */ |
| 286 |
const void *e1, |
| 287 |
const void *e2 |
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) |
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{ |
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if (((EDGE*)e1)->len2 > ((EDGE*)e2)->len2) |
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return(-1); |
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if (((EDGE*)e1)->len2 < ((EDGE*)e2)->len2) |
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return(1); |
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return(0); |
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} |
| 296 |
|
| 297 |
|
| 298 |
int |
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buildxf( /* build transform for marker */ |
| 300 |
char *xf, |
| 301 |
double markscale, |
| 302 |
FILE *fin |
| 303 |
) |
| 304 |
{ |
| 305 |
static FVECT vlist[MAXVERT]; |
| 306 |
static EDGE elist[MAXVERT]; |
| 307 |
FVECT xvec, yvec, zvec; |
| 308 |
double xlen; |
| 309 |
int n; |
| 310 |
int i; |
| 311 |
/* |
| 312 |
* Read and sort vectors: longest is hypotenuse, |
| 313 |
* second longest is x' axis, |
| 314 |
* third longest is y' axis (approximate), |
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* other vectors are ignored. |
| 316 |
* It is an error if the x' and y' axes do |
| 317 |
* not share a common vertex (their origin). |
| 318 |
*/ |
| 319 |
if (fscanf(fin, "%*d %*d %d", &n) != 1) |
| 320 |
return(-1); |
| 321 |
if (n%3 != 0) |
| 322 |
return(-1); |
| 323 |
n /= 3; |
| 324 |
if (n < 3 || n > MAXVERT) |
| 325 |
return(-1); |
| 326 |
/* sort edges in descending order */ |
| 327 |
for (i = 0; i < n; i++) { |
| 328 |
if (fscanf(fin, "%lf %lf %lf", &vlist[i][0], |
| 329 |
&vlist[i][1], &vlist[i][2]) != 3) |
| 330 |
return(-1); |
| 331 |
if (i) { |
| 332 |
elist[i].beg = i-1; |
| 333 |
elist[i].end = i; |
| 334 |
elist[i].len2 = dist2(vlist[i-1],vlist[i]); |
| 335 |
} |
| 336 |
} |
| 337 |
elist[0].beg = n-1; |
| 338 |
elist[0].end = 0; |
| 339 |
elist[0].len2 = dist2(vlist[n-1],vlist[0]); |
| 340 |
qsort(elist, n, sizeof(EDGE), edgecmp); |
| 341 |
/* find x' and y' */ |
| 342 |
if (elist[1].end == elist[2].beg || elist[1].end == elist[2].end) { |
| 343 |
i = elist[1].beg; |
| 344 |
elist[1].beg = elist[1].end; |
| 345 |
elist[1].end = i; |
| 346 |
} |
| 347 |
if (elist[2].end == elist[1].beg) { |
| 348 |
i = elist[2].beg; |
| 349 |
elist[2].beg = elist[2].end; |
| 350 |
elist[2].end = i; |
| 351 |
} |
| 352 |
if (elist[1].beg != elist[2].beg) |
| 353 |
return(-1); /* x' and y' not connected! */ |
| 354 |
for (i = 0; i < 3; i++) { |
| 355 |
xvec[i] = vlist[elist[1].end][i] - vlist[elist[1].beg][i]; |
| 356 |
yvec[i] = vlist[elist[2].end][i] - vlist[elist[2].beg][i]; |
| 357 |
} |
| 358 |
if ((xlen = normalize(xvec)) == 0.0) |
| 359 |
return(-1); |
| 360 |
fcross(zvec, xvec, yvec); |
| 361 |
if (normalize(zvec) == 0.0) |
| 362 |
return(-1); |
| 363 |
fcross(yvec, zvec, xvec); |
| 364 |
n = 0; /* start transformation... */ |
| 365 |
if (markscale > 0.0) { /* add scale factor */ |
| 366 |
sprintf(xf, " -s %f", xlen*markscale); |
| 367 |
n += 2; |
| 368 |
while (*xf) ++xf; |
| 369 |
} |
| 370 |
/* add rotation */ |
| 371 |
n += addrot(xf, xvec, yvec, zvec); |
| 372 |
while (*xf) ++xf; |
| 373 |
/* add translation */ |
| 374 |
n += 4; |
| 375 |
sprintf(xf, " -t %f %f %f", vlist[elist[1].beg][0], |
| 376 |
vlist[elist[1].beg][1], vlist[elist[1].beg][2]); |
| 377 |
return(n); /* all done */ |
| 378 |
} |
| 379 |
|
| 380 |
|
| 381 |
int |
| 382 |
addrot( /* compute rotation (x,y,z) => (xp,yp,zp) */ |
| 383 |
char *xf, |
| 384 |
FVECT xp, |
| 385 |
FVECT yp, |
| 386 |
FVECT zp |
| 387 |
) |
| 388 |
{ |
| 389 |
int n; |
| 390 |
double theta; |
| 391 |
|
| 392 |
if (yp[2]*yp[2] + zp[2]*zp[2] < 2.*FTINY*FTINY) { |
| 393 |
/* Special case for X' along Z-axis */ |
| 394 |
theta = -atan2(yp[0], yp[1]); |
| 395 |
sprintf(xf, " -ry %f -rz %f", |
| 396 |
xp[2] < 0.0 ? 90.0 : -90.0, |
| 397 |
theta*(180./PI)); |
| 398 |
return(4); |
| 399 |
} |
| 400 |
n = 0; |
| 401 |
theta = atan2(yp[2], zp[2]); |
| 402 |
if (!FABSEQ(theta,0.0)) { |
| 403 |
sprintf(xf, " -rx %f", theta*(180./PI)); |
| 404 |
while (*xf) ++xf; |
| 405 |
n += 2; |
| 406 |
} |
| 407 |
theta = Asin(-xp[2]); |
| 408 |
if (!FABSEQ(theta,0.0)) { |
| 409 |
sprintf(xf, " -ry %f", theta*(180./PI)); |
| 410 |
while (*xf) ++xf; |
| 411 |
n += 2; |
| 412 |
} |
| 413 |
theta = atan2(xp[1], xp[0]); |
| 414 |
if (!FABSEQ(theta,0.0)) { |
| 415 |
sprintf(xf, " -rz %f", theta*(180./PI)); |
| 416 |
/* while (*xf) ++xf; */ |
| 417 |
n += 2; |
| 418 |
} |
| 419 |
return(n); |
| 420 |
} |
