src/cv/ies2rad.c

/* Copyright (c) 1992 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 * Convert IES luminaire data to Radiance description
 *
 *      07Apr90         Greg Ward
 */

#include <stdio.h>
#include <math.h>
#include <ctype.h>
#include "color.h"
#include "paths.h"

#define PI              3.14159265358979323846
                                        /* floating comparisons */
#define FTINY           1e-6
#define FEQ(a,b)        ((a)<=(b)+FTINY&&(a)>=(b)-FTINY)
                                        /* keywords */
#define MAGICID         "IESNA"
#define LMAGICID        5
#define FIRSTREV        86
#define LASTREV         95

#define D86             0               /* keywords defined in LM-63-1986 */

#define K_TST           0
#define K_MAN           1
#define K_LMC           2
#define K_LMN           3
#define K_LPC           4
#define K_LMP           5
#define K_BAL           6
#define K_MTC           7
#define K_OTH           8
#define K_SCH           9
#define K_MOR           10
#define K_BLK           11
#define K_EBK           12

#define D91             ((1L<<13)-1)    /* keywords defined in LM-63-1991 */

#define K_LMG           13

#define D95             ((1L<<14)-1)    /* keywords defined in LM-63-1995 */

char    k_kwd[][20] = {"TEST", "MANUFAC", "LUMCAT", "LUMINAIRE", "LAMPCAT",
                        "LAMP", "BALLAST", "MAINTCAT", "OTHER", "SEARCH",
                        "MORE", "BLOCK", "ENDBLOCK", "LUMINOUSGEOMETRY"};

long k_defined[] = {D86, D86, D86, D86, D86, D91, D91, D91, D91, D95};

int     filerev = FIRSTREV;

#define keymatch(i,s)   (k_defined[filerev-FIRSTREV]&1L<<(i) &&\
                                k_match(k_kwd[i],s))

#define checklamp(s)    (!(k_defined[filerev-FIRSTREV]&(1<<K_LMP|1<<K_LPC)) ||\
                                keymatch(K_LMP,s) || keymatch(K_LPC,s))

                                        /* tilt specs */
#define TLTSTR          "TILT="
#define TLTSTRLEN       5
#define TLTNONE         "NONE"
#define TLTINCL         "INCLUDE"
#define TLT_VERT        1
#define TLT_H0          2
#define TLT_H90         3
                                        /* photometric types */
#define PM_C            1
#define PM_B            2
                                        /* unit types */
#define U_FEET          1
#define U_METERS        2
                                        /* string lengths */
#define MAXLINE         132
#define MAXWORD         76
                                        /* file types */
#define T_RAD           ".rad"
#define T_DST           ".dat"
#define T_TLT           "%.dat"
#define T_OCT           ".oct"
                                        /* shape types */
#define RECT            1
#define DISK            2
#define SPHERE          3

#define MINDIM          .001            /* minimum dimension (point source) */

#define F_M             .3048           /* feet to meters */

#define abspath(p)      (ISDIRSEP((p)[0]) || (p)[0] == '.')

static char     default_name[] = "default";

char    *libdir = NULL;                 /* library directory location */
char    *prefdir = NULL;                /* subdirectory */
char    *lampdat = "lamp.tab";          /* lamp data file */

double  meters2out = 1.0;               /* conversion from meters to output */
char    *lamptype = NULL;               /* selected lamp type */
char    *deflamp = NULL;                /* default lamp type */
float   defcolor[3] = {1.,1.,1.};       /* default lamp color */
float   *lampcolor = defcolor;          /* pointer to current lamp color */
double  multiplier = 1.0;               /* multiplier for all light sources */
char    units[64] = "meters";           /* output units */
int     instantiate = 0;                /* instantiate geometry */
double  illumrad = 0.0;                 /* radius for illum sphere */

typedef struct {
        int     isillum;                        /* do as illum */
        int     type;                           /* RECT, DISK, SPHERE */
        double  mult;                           /* candela multiplier */
        double  w, l, h;                        /* width, length, height */
        double  area;                           /* max. projected area */
} SRCINFO;                              /* a source shape (units=meters) */

int     gargc;                          /* global argc (minus filenames) */
char    **gargv;                        /* global argv */

extern char     *strcpy(), *strcat(), *stradd(), *tailtrunc(), *filetrunc(),
                *filename(), *libname(), *fullname(), *malloc(),
                *getword(), *atos();
extern float    *matchlamp();

#define scnint(fp,ip)   cvtint(ip,getword(fp))
#define scnflt(fp,rp)   cvtflt(rp,getword(fp))
#define isint           isflt                   /* IES allows real as integer */


main(argc, argv)
int     argc;
char    *argv[];
{
        char    *outfile = NULL;
        int     status;
        char    outname[MAXWORD];
        double  d1;
        int     i;
        
        for (i = 1; i < argc && argv[i][0] == '-'; i++)
                switch (argv[i][1]) {
                case 'd':               /* dimensions */
                        if (argv[i][2] == '\0')
                                goto badopt;
                        if (argv[i][3] == '\0')
                                d1 = 1.0;
                        else if (argv[i][3] == '/') {
                                d1 = atof(argv[i]+4);
                                if (d1 <= FTINY)
                                        goto badopt;
                        } else
                                goto badopt;
                        switch (argv[i][2]) {
                        case 'c':               /* centimeters */
                                if (FEQ(d1,10.))
                                        strcpy(units,"millimeters");
                                else {
                                        strcpy(units,"centimeters");
                                        strcat(units,argv[i]+3);
                                }
                                meters2out = 100.*d1;
                                break;
                        case 'm':               /* meters */
                                if (FEQ(d1,1000.))
                                        strcpy(units,"millimeters");
                                else if (FEQ(d1,100.))
                                        strcpy(units,"centimeters");
                                else {
                                        strcpy(units,"meters");
                                        strcat(units,argv[i]+3);
                                }
                                meters2out = d1;
                                break;
                        case 'i':               /* inches */
                                strcpy(units,"inches");
                                strcat(units,argv[i]+3);
                                meters2out = d1*(12./F_M);
                                break;
                        case 'f':               /* feet */
                                if (FEQ(d1,12.))
                                        strcpy(units,"inches");
                                else {
                                        strcpy(units,"feet");
                                        strcat(units,argv[i]+3);
                                }
                                meters2out = d1/F_M;
                                break;
                        default:
                                goto badopt;
                        }
                        break;
                case 'l':               /* library directory */
                        libdir = argv[++i];
                        break;
                case 'p':               /* prefix subdirectory */
                        prefdir = argv[++i];
                        break;
                case 'f':               /* lamp data file */
                        lampdat = argv[++i];
                        break;
                case 'o':               /* output file name */
                        outfile = argv[++i];
                        break;
                case 'i':               /* illum */
                        illumrad = atof(argv[++i]);
                        break;
                case 'g':               /* instatiate geometry? */
                        instantiate = !instantiate;
                        break;
                case 't':               /* override lamp type */
                        lamptype = argv[++i];
                        break;
                case 'u':               /* default lamp type */
                        deflamp = argv[++i];
                        break;
                case 'c':               /* default lamp color */
                        defcolor[0] = atof(argv[++i]);
                        defcolor[1] = atof(argv[++i]);
                        defcolor[2] = atof(argv[++i]);
                        break;
                case 'm':               /* multiplier */
                        multiplier = atof(argv[++i]);
                        break;
                default:
                badopt:
                        fprintf(stderr, "%s: bad option: %s\n",
                                        argv[0], argv[i]);
                        exit(1);
                }
        gargc = i;
        gargv = argv;
        initlamps();                    /* get lamp data (if needed) */
                                        /* convert ies file(s) */
        if (outfile != NULL) {
                if (i == argc)
                        exit(ies2rad(NULL, outfile) == 0 ? 0 : 1);
                else if (i == argc-1)
                        exit(ies2rad(argv[i], outfile) == 0 ? 0 : 1);
                else {
                        fprintf(stderr, "%s: single input file required\n",
                                        argv[0]);
                        exit(1);
                }
        } else if (i >= argc) {
                fprintf(stderr, "%s: missing output file specification\n",
                                argv[0]);
                exit(1);
        }
        status = 0;
        for ( ; i < argc; i++) {
                tailtrunc(strcpy(outname,filename(argv[i])));
                if (ies2rad(argv[i], outname) != 0)
                        status = 1;
        }
        exit(status);
}


initlamps()                             /* set up lamps */
{
        float   *lcol;
        int     status;

        if (lamptype != NULL && !strcmp(lamptype, default_name) &&
                        deflamp == NULL)
                return;                         /* no need for data */
                                                /* else load file */
        if ((status = loadlamps(lampdat)) < 0)
                exit(1);
        if (status == 0) {
                fprintf(stderr, "%s: warning - no lamp data\n", lampdat);
                lamptype = default_name;
                return;
        }
        if (deflamp != NULL) {                  /* match default type */
                if ((lcol = matchlamp(deflamp)) == NULL)
                        fprintf(stderr,
                                "%s: warning - unknown default lamp type\n",
                                        deflamp);
                else
                        copycolor(defcolor, lcol);
        }
        if (lamptype != NULL) {                 /* match selected type */
                if (strcmp(lamptype, default_name)) {
                        if ((lcol = matchlamp(lamptype)) == NULL) {
                                fprintf(stderr,
                                        "%s: warning - unknown lamp type\n",
                                                lamptype);
                                lamptype = default_name;
                        } else
                                copycolor(defcolor, lcol);
                }
                freelamps();                    /* all done with data */
        }
                                                /* else keep lamp data */
}


char *
stradd(dst, src, sep)                   /* add a string at dst */
register char   *dst, *src;
int     sep;
{
        if (src && *src) {
                do
                        *dst++ = *src++;
                while (*src);
                if (sep && dst[-1] != sep)
                        *dst++ = sep;
        }
        *dst = '\0';
        return(dst);
}


char *
fullname(path, fname, suffix)           /* return full path name */
char    *path, *fname, *suffix;
{
        if (prefdir != NULL && abspath(prefdir))
                libname(path, fname, suffix);
        else if (abspath(fname))
                strcpy(stradd(path, fname, 0), suffix);
        else
                libname(stradd(path, libdir, DIRSEP), fname, suffix);

        return(path);
}


char *
libname(path, fname, suffix)            /* return library relative name */
char    *path, *fname, *suffix;
{
        if (abspath(fname))
                strcpy(stradd(path, fname, 0), suffix);
        else
                strcpy(stradd(stradd(path, prefdir, DIRSEP), fname, 0), suffix);

        return(path);
}


char *
filename(path)                  /* get final component of pathname */
register char   *path;
{
        register char   *cp;

        for (cp = path; *path; path++)
                if (ISDIRSEP(*path))
                        cp = path+1;
        return(cp);
}


char *
filetrunc(path)                         /* truncate filename at end of path */
char    *path;
{
        register char   *p1, *p2;

        for (p1 = p2 = path; *p2; p2++)
                if (ISDIRSEP(*p2))
                        p1 = p2;
        if (p1 == path && ISDIRSEP(*p1))
                p1++;
        *p1 = '\0';
        return(path);
}


char *
tailtrunc(name)                         /* truncate tail of filename */
char    *name;
{
        register char   *p1, *p2;

        for (p1 = filename(name); *p1 == '.'; p1++)
                ;
        p2 = NULL;
        for ( ; *p1; p1++)
                if (*p1 == '.')
                        p2 = p1;
        if (p2 != NULL)
                *p2 = '\0';
        return(name);
}


blanktrunc(s)                           /* truncate spaces at end of line */
char    *s;
{
        register char   *cp;

        for (cp = s; *cp; cp++)
                ;
        while (cp-- > s && isspace(*cp))
                ;
        *++cp = '\0';
}


k_match(kwd, hdl)                       /* header line matches keyword? */
register char   *kwd, *hdl;
{
        if (!*hdl++ == '[')
                return(0);
        while (islower(*hdl) ? toupper(*hdl) == *kwd++ : *hdl == *kwd++)
                if (!*hdl++)
                        return(0);
        return(!*kwd & *hdl == ']');
}


char *
keyargs(hdl)                            /* return keyword arguments */
register char   *hdl;
{
        while (*hdl && *hdl++ != ']')
                ;
        while (isspace(*hdl))
                hdl++;
        return(hdl);
}


putheader(out)                          /* print header */
FILE    *out;
{
        register int    i;
        
        putc('#', out);
        for (i = 0; i < gargc; i++) {
                putc(' ', out);
                fputs(gargv[i], out);
        }
        fputs("\n# Dimensions in ", out);
        fputs(units, out);
        putc('\n', out);
}


ies2rad(inpname, outname)               /* convert IES file */
char    *inpname, *outname;
{
        SRCINFO srcinfo;
        char    buf[MAXLINE], tltid[MAXWORD];
        char    geomfile[128];
        FILE    *inpfp, *outfp;
        int     lineno = 0;

        geomfile[0] = '\0';
        srcinfo.isillum = 0;
        if (inpname == NULL) {
                inpname = "<stdin>";
                inpfp = stdin;
        } else if ((inpfp = fopen(inpname, "r")) == NULL) {
                perror(inpname);
                return(-1);
        }
        if ((outfp = fopen(fullname(buf,outname,T_RAD), "w")) == NULL) {
                perror(buf);
                fclose(inpfp);
                return(-1);
        }
        putheader(outfp);
        if (lamptype == NULL)
                lampcolor = NULL;
        while (fgets(buf,sizeof(buf),inpfp) != NULL
                        && strncmp(buf,TLTSTR,TLTSTRLEN)) {
                blanktrunc(buf);
                if (!buf[0])
                        continue;
                if (!lineno++ && !strncmp(buf, MAGICID, LMAGICID)) {
                        filerev = atoi(buf+LMAGICID);
                        if (filerev < FIRSTREV)
                                filerev = FIRSTREV;
                        else if (filerev > LASTREV)
                                filerev = LASTREV;
                }
                fputs("#<", outfp);
                fputs(buf, outfp);
                putc('\n', outfp);
                if (lampcolor == NULL && checklamp(buf))
                        lampcolor = matchlamp( buf[0] == '[' ?
                                                keyargs(buf) : buf );
                if (keymatch(K_LMG, buf)) {             /* geometry file */
                        strcpy(geomfile, inpname);
                        strcpy(filename(geomfile), keyargs(buf));
                        srcinfo.isillum = 1;
                }
        }
        if (lampcolor == NULL) {
                fprintf(stderr, "%s: warning - no lamp type\n", inpname);
                fputs("# Unknown lamp type (used default)\n", outfp);
                lampcolor = defcolor;
        } else if (lamptype == NULL)
                fprintf(outfp,"# CIE(x,y) = (%f,%f)\n# Depreciation = %.1f%%\n",
                                lampcolor[3], lampcolor[4], 100.*lampcolor[5]);
        if (feof(inpfp)) {
                fprintf(stderr, "%s: not in IES format\n", inpname);
                goto readerr;
        }
        atos(tltid, MAXWORD, buf+TLTSTRLEN);
        if (inpfp == stdin)
                buf[0] = '\0';
        else
                filetrunc(strcpy(buf, inpname));
        if (dotilt(inpfp, outfp, buf, tltid, outname, tltid) != 0) {
                fprintf(stderr, "%s: bad tilt data\n", inpname);
                goto readerr;
        }
        if (dosource(&srcinfo, inpfp, outfp, tltid, outname) != 0) {
                fprintf(stderr, "%s: bad luminaire data\n", inpname);
                goto readerr;
        }
        fclose(inpfp);
                                        /* cvgeometry closes outfp */
        if (cvgeometry(geomfile, &srcinfo, outname, outfp) != 0) {
                fprintf(stderr, "%s: bad geometry file\n", geomfile);
                return(-1);
        }
        return(0);
readerr:
        fclose(inpfp);
        fclose(outfp);
        unlink(fullname(buf,outname,T_RAD));
        return(-1);
}


dotilt(in, out, dir, tltspec, dfltname, tltid)  /* convert tilt data */
FILE    *in, *out;
char    *dir, *tltspec, *dfltname, *tltid;
{
        int     nangles, tlt_type;
        double  minmax[2];
        char    buf[MAXPATH], tltname[MAXWORD];
        FILE    *datin, *datout;

        if (!strcmp(tltspec, TLTNONE)) {
                datin = NULL;
                strcpy(tltid, "void");
        } else if (!strcmp(tltspec, TLTINCL)) {
                datin = in;
                strcpy(tltname, dfltname);
        } else {
                if (ISDIRSEP(tltspec[0]))
                        strcpy(buf, tltspec);
                else
                        strcpy(stradd(buf, dir, DIRSEP), tltspec);
                if ((datin = fopen(buf, "r")) == NULL) {
                        perror(buf);
                        return(-1);
                }
                tailtrunc(strcpy(tltname,filename(tltspec)));
        }
        if (datin != NULL) {
                if ((datout = fopen(fullname(buf,tltname,T_TLT),"w")) == NULL) {
                        perror(buf);
                        if (datin != in)
                                fclose(datin);
                        return(-1);
                }
                if (!scnint(datin,&tlt_type) || !scnint(datin,&nangles)
                        || cvdata(datin,datout,1,&nangles,1.,minmax) != 0) {
                        fprintf(stderr, "%s: data format error\n", tltspec);
                        fclose(datout);
                        if (datin != in)
                                fclose(datin);
                        unlink(fullname(buf,tltname,T_TLT));
                        return(-1);
                }
                fclose(datout);
                if (datin != in)
                        fclose(datin);
                strcat(strcpy(tltid, filename(tltname)), "_tilt");
                fprintf(out, "\nvoid brightdata %s\n", tltid);
                libname(buf,tltname,T_TLT);
                switch (tlt_type) {
                case TLT_VERT:                  /* vertical */
                        fprintf(out, "4 noop %s tilt.cal %s\n", buf,
                                minmax[1]>90.+FTINY ? "tilt_ang" : "tilt_ang2");
                        break;
                case TLT_H0:                    /* horiz. in 0 deg. plane */
                        fprintf(out, "6 noop %s tilt.cal %s -rz 90\n", buf,
                        minmax[1]>90.+FTINY ? "tilt_xang" : "tilt_xang2");
                        break;
                case TLT_H90:
                        fprintf(out, "4 noop %s tilt.cal %s\n", buf,
                        minmax[1]>90.+FTINY ? "tilt_xang" : "tilt_xang2");
                        break;
                default:
                        fprintf(stderr,
                                "%s: illegal lamp to luminaire geometry (%d)\n",
                                tltspec, tlt_type);
                        return(-1);
                }
                fprintf(out, "0\n0\n");
        }
        return(0);
}


dosource(sinf, in, out, mod, name)      /* create source and distribution */
SRCINFO *sinf;
FILE    *in, *out;
char    *mod, *name;
{
        char    buf[MAXPATH], id[MAXWORD];
        FILE    *datout;
        double  mult, bfactor, pfactor, width, length, height, wattage;
        double  bounds[2][2];
        int     nangles[2], pmtype, unitype;
        double  d1;

        if (!isint(getword(in)) || !isflt(getword(in)) || !scnflt(in,&mult)
                        || !scnint(in,&nangles[0]) || !scnint(in,&nangles[1])
                        || !scnint(in,&pmtype) || !scnint(in,&unitype)
                        || !scnflt(in,&width) || !scnflt(in,&length)
                        || !scnflt(in,&height) || !scnflt(in,&bfactor)
                        || !scnflt(in,&pfactor) || !scnflt(in,&wattage)) {
                fprintf(stderr, "dosource: bad lamp specification\n");
                return(-1);
        }
        sinf->mult = multiplier*mult*bfactor*pfactor;
        if (nangles[0] < 2 || nangles[1] < 1) {
                fprintf(stderr, "dosource: too few measured angles\n");
                return(-1);
        }
        if (unitype == U_FEET) {
                width *= F_M;
                length *= F_M;
                height *= F_M;
        }
        if (makeshape(sinf, width, length, height) != 0) {
                fprintf(stderr, "dosource: illegal source dimensions");
                return(-1);
        }
        if ((datout = fopen(fullname(buf,name,T_DST), "w")) == NULL) {
                perror(buf);
                return(-1);
        }
        if (cvdata(in, datout, 2, nangles, 1./WHTEFFICACY, bounds) != 0) {
                fprintf(stderr, "dosource: bad distribution data\n");
                fclose(datout);
                unlink(fullname(buf,name,T_DST));
                return(-1);
        }
        fclose(datout);
        fprintf(out, "# %g watt luminaire, lamp*ballast factor = %g\n",
                        wattage, bfactor*pfactor);
        strcat(strcpy(id, filename(name)), "_dist");
        fprintf(out, "\n%s brightdata %s\n", mod, id);
        if (nangles[1] < 2)
                fprintf(out, "4 ");
        else if (pmtype == PM_B)
                fprintf(out, "5 ");
        else if (FEQ(bounds[1][0],90.) && FEQ(bounds[1][1],270.))
                fprintf(out, "7 ");
        else
                fprintf(out, "5 ");
        fprintf(out, "%s %s source.cal ",
                        sinf->type==SPHERE ? "corr" : "flatcorr",
                        libname(buf,name,T_DST));
        if (pmtype == PM_B) {
                if (FEQ(bounds[1][0],0.))
                        fprintf(out, "srcB_horiz2 ");
                else
                        fprintf(out, "srcB_horiz ");
                fprintf(out, "srcB_vert ");
        } else {
                if (nangles[1] >= 2) {
                        d1 = bounds[1][1] - bounds[1][0];
                        if (d1 <= 90.+FTINY)
                                fprintf(out, "src_phi4 ");
                        else if (d1 <= 180.+FTINY)
                                fprintf(out, "src_phi2 ");
                        else
                                fprintf(out, "src_phi ");
                        fprintf(out, "src_theta ");
                        if (FEQ(bounds[1][0],90.) && FEQ(bounds[1][1],270.))
                                fprintf(out, "-rz -90 ");
                } else
                        fprintf(out, "src_theta ");
        }
        fprintf(out, "\n0\n1 %g\n", sinf->mult);
        if (putsource(sinf, out, id, filename(name),
                        bounds[0][0]<90., bounds[0][1]>90.) != 0)
                return(-1);
        return(0);
}


putsource(shp, fp, mod, name, dolower, doupper)         /* put out source */
SRCINFO *shp;
FILE    *fp;
char    *mod, *name;
int     dolower, doupper;
{
        char    buf[MAXWORD];
        
        fprintf(fp, "\n%s %s %s_light\n", mod,
                        shp->isillum ? "illum" : "light",
                        name);
        fprintf(fp, "0\n0\n3 %g %g %g\n",
                        lampcolor[0]/shp->area,
                        lampcolor[1]/shp->area,
                        lampcolor[2]/shp->area);
        if (doupper && dolower && shp->type != SPHERE && shp->h > MINDIM)
                if (shp->isillum) {
                        fprintf(fp, "\nvoid illum %s_glow\n", name);
                        fprintf(fp, "0\n0\n3 0 0 0\n");
                } else {
                        fprintf(fp, "\n%s glow %s_glow\n", mod, name);
                        fprintf(fp, "0\n0\n4 %g %g %g -1\n",
                                        lampcolor[0]/shp->area,
                                        lampcolor[1]/shp->area,
                                        lampcolor[2]/shp->area);
                }
        switch (shp->type) {
        case RECT:
                strcat(strcpy(buf, name), "_light");
                if (dolower)
                        putrectsrc(shp, fp, buf, name, 0);
                if (doupper)
                        putrectsrc(shp, fp, buf, name, 1);
                if (doupper && dolower && shp->h > MINDIM) {
                        strcat(strcpy(buf, name), "_glow");
                        putsides(shp, fp, buf, name);
                }
                break;
        case DISK:
                strcat(strcpy(buf, name), "_light");
                if (dolower)
                        putdisksrc(shp, fp, buf, name, 0);
                if (doupper)
                        putdisksrc(shp, fp, buf, name, 1);
                if (doupper && dolower && shp->h > MINDIM) {
                        strcat(strcpy(buf, name), "_glow");
                        putcyl(shp, fp, buf, name);
                }
                break;
        case SPHERE:
                strcat(strcpy(buf, name), "_light");
                putspheresrc(shp, fp, buf, name);
                break;
        }
        return(0);
}


makeshape(shp, width, length, height)           /* make source shape */
register SRCINFO        *shp;
double  width, length, height;
{
        if (illumrad/meters2out >= MINDIM/2.) {
                shp->isillum = 1;
                shp->type = SPHERE;
                shp->w = shp->l = shp->h = 2.*illumrad / meters2out;
        } else if (width < MINDIM) {
                width = -width;
                if (width < MINDIM) {
                        shp->type = SPHERE;
                        shp->w = shp->l = shp->h = MINDIM;
                } else if (height < .5*width) {
                        shp->type = DISK;
                        shp->w = shp->l = width;
                        if (height >= MINDIM)
                                shp->h = height;
                        else
                                shp->h = .5*MINDIM;
                } else {
                        shp->type = SPHERE;
                        shp->w = shp->l = shp->h = width;
                }
        } else {
                shp->type = RECT;
                shp->w = width;
                if (length >= MINDIM)
                        shp->l = length;
                else
                        shp->l = MINDIM;
                if (height >= MINDIM)
                        shp->h = height;
                else
                        shp->h = .5*MINDIM;
        }
        switch (shp->type) {
        case RECT:
                shp->area = shp->w * shp->l;
                break;
        case DISK:
        case SPHERE:
                shp->area = PI/4. * shp->w * shp->w;
                break;
        }
        return(0);
}


putrectsrc(shp, fp, mod, name, up)              /* rectangular source */
SRCINFO *shp;
FILE    *fp;
char    *mod, *name;
int     up;
{
        if (up)
                putrect(shp, fp, mod, name, ".u", 4, 5, 7, 6);
        else
                putrect(shp, fp, mod, name, ".d", 0, 2, 3, 1);
}


putsides(shp, fp, mod, name)                    /* put out sides of box */
register SRCINFO        *shp;
FILE    *fp;
char    *mod, *name;
{
        putrect(shp, fp, mod, name, ".1", 0, 1, 5, 4);
        putrect(shp, fp, mod, name, ".2", 1, 3, 7, 5);
        putrect(shp, fp, mod, name, ".3", 3, 2, 6, 7);
        putrect(shp, fp, mod, name, ".4", 2, 0, 4, 6);
}
        

putrect(shp, fp, mod, name, suffix, a, b, c, d) /* put out a rectangle */
SRCINFO *shp;
FILE    *fp;
char    *mod, *name, *suffix;
int     a, b, c, d;
{
        fprintf(fp, "\n%s polygon %s%s\n0\n0\n12\n", mod, name, suffix);
        putpoint(shp, fp, a);
        putpoint(shp, fp, b);
        putpoint(shp, fp, c);
        putpoint(shp, fp, d);
}


putpoint(shp, fp, p)                            /* put out a point */
register SRCINFO        *shp;
FILE    *fp;
int     p;
{
        static double   mult[2] = {-.5, .5};

        fprintf(fp, "\t%g\t%g\t%g\n",
                        mult[p&1]*shp->l*meters2out,
                        mult[p>>1&1]*shp->w*meters2out,
                        mult[p>>2]*shp->h*meters2out);
}


putdisksrc(shp, fp, mod, name, up)              /* put out a disk source */
register SRCINFO        *shp;
FILE    *fp;
char    *mod, *name;
int     up;
{
        if (up) {
                fprintf(fp, "\n%s ring %s.u\n", mod, name);
                fprintf(fp, "0\n0\n8\n");
                fprintf(fp, "\t0 0 %g\n", .5*shp->h*meters2out);
                fprintf(fp, "\t0 0 1\n");
                fprintf(fp, "\t0 %g\n", .5*shp->w*meters2out);
        } else {
                fprintf(fp, "\n%s ring %s.d\n", mod, name);
                fprintf(fp, "0\n0\n8\n");
                fprintf(fp, "\t0 0 %g\n", -.5*shp->h*meters2out);
                fprintf(fp, "\t0 0 -1\n");
                fprintf(fp, "\t0 %g\n", .5*shp->w*meters2out);
        }
}


putcyl(shp, fp, mod, name)                      /* put out a cylinder */
register SRCINFO        *shp;
FILE    *fp;
char    *mod, *name;
{
        fprintf(fp, "\n%s cylinder %s.c\n", mod, name);
        fprintf(fp, "0\n0\n7\n");
        fprintf(fp, "\t0 0 %g\n", .5*shp->h*meters2out);
        fprintf(fp, "\t0 0 %g\n", -.5*shp->h*meters2out);
        fprintf(fp, "\t%g\n", .5*shp->w*meters2out);
}


putspheresrc(shp, fp, mod, name)                /* put out a sphere source */
SRCINFO *shp;
FILE    *fp;
char    *mod, *name;
{
        fprintf(fp, "\n%s sphere %s.s\n", mod, name);
        fprintf(fp, "0\n0\n4 0 0 0 %g\n", .5*shp->w*meters2out);
}


cvdata(in, out, ndim, npts, mult, lim)          /* convert data */
FILE    *in, *out;
int     ndim, npts[];
double  mult, lim[][2];
{
        double  *pt[4];
        register int    i, j;
        double  val;
        int     total;

        total = 1; j = 0;
        for (i = 0; i < ndim; i++)
                if (npts[i] > 1) {
                        total *= npts[i];
                        j++;
                }
        fprintf(out, "%d\n", j);
                                        /* get coordinates */
        for (i = 0; i < ndim; i++) {
                pt[i] = (double *)malloc(npts[i]*sizeof(double));
                for (j = 0; j < npts[i]; j++)
                        if (!scnflt(in, &pt[i][j]))
                                return(-1);
                if (lim != NULL) {
                        lim[i][0] = pt[i][0];
                        lim[i][1] = pt[i][npts[i]-1];
                }
        }
                                        /* write out in reverse */
        for (i = ndim-1; i >= 0; i--) {
                if (npts[i] > 1) {
                        for (j = 1; j < npts[i]-1; j++)
                                if (!FEQ(pt[i][j]-pt[i][j-1],
                                                pt[i][j+1]-pt[i][j]))
                                        break;
                        if (j == npts[i]-1)
                                fprintf(out, "%g %g %d\n", pt[i][0], pt[i][j],
                                                npts[i]);
                        else {
                                fprintf(out, "0 0 %d", npts[i]);
                                for (j = 0; j < npts[i]; j++) {
                                        if (j%4 == 0)
                                                putc('\n', out);
                                        fprintf(out, "\t%g", pt[i][j]);
                                }
                                putc('\n', out);
                        }
                }
                free((char *)pt[i]);
        }
        for (i = 0; i < total; i++) {
                if (i%4 == 0)
                        putc('\n', out);
                if (!scnflt(in, &val))
                        return(-1);
                fprintf(out, "\t%g", val*mult);
        }
        putc('\n', out);
        return(0);
}


char *
getword(fp)                     /* scan a word from fp */
register FILE   *fp;
{
        static char     word[MAXWORD];
        register char   *cp;
        register int    c;

        while (isspace(c=getc(fp)))
                ;
        for (cp = word; c != EOF && cp < word+MAXWORD-1;
                        *cp++ = c, c = getc(fp))
                if (isspace(c) || c == ',') {
                        while (isspace(c))
                                c = getc(fp);
                        if (c != EOF & c != ',')
                                ungetc(c, fp);
                        *cp = '\0';
                        return(word);
                }
        *cp = '\0';
        return(cp > word ? word : NULL);
}


cvtint(ip, word)                /* convert a word to an integer */
int     *ip;
char    *word;
{
        if (word == NULL || !isint(word))
                return(0);
        *ip = atoi(word);
        return(1);
}


cvtflt(rp, word)                /* convert a word to a double */
double  *rp;
char    *word;
{
        if (word == NULL || !isflt(word))
                return(0);
        *rp = atof(word);
        return(1);
}


cvgeometry(inpname, sinf, outname, outfp)
char    *inpname;
register SRCINFO        *sinf;
char    *outname;
FILE    *outfp;                 /* close output file upon return */
{
        char    buf[256];
        register char   *cp;

        if (inpname == NULL || !inpname[0]) {   /* no geometry file */
                fclose(outfp);
                return(0);
        }
        putc('\n', outfp);
        strcpy(buf, "mgf2rad ");                /* build mgf2rad command */
        cp = buf+8;
        if (!FEQ(sinf->mult, 1.0)) {
                sprintf(cp, "-m %f ", sinf->mult);
                cp += strlen(cp);
        }
        sprintf(cp, "-g %f %s ",
                sqrt(sinf->w*sinf->w + sinf->h*sinf->h + sinf->l*sinf->l),
                        inpname);
        cp += strlen(cp);
        if (instantiate) {              /* instantiate octree */
                strcpy(cp, "| oconv - > ");
                cp += 12;
                fullname(cp,outname,T_OCT);
                if (system(buf)) {              /* create octree */
                        fclose(outfp);
                        return(-1);
                }
                fprintf(outfp, "void instance %s_inst\n", outname);
                if (!FEQ(meters2out, 1.0))
                        fprintf(outfp, "3 %s -s %f\n",
                                        libname(buf,outname,T_OCT),
                                        meters2out);
                else
                        fprintf(outfp, "1 %s\n", libname(buf,outname,T_OCT));
                fprintf(outfp, "0\n0\n");
                fclose(outfp);
        } else {                        /* else append to luminaire file */
                fclose(outfp);
                if (!FEQ(meters2out, 1.0)) {    /* apply scalefactor */
                        sprintf(cp, "| xform -s %f ", meters2out);
                        cp += strlen(cp);
                }
                strcpy(cp, ">> ");              /* append works for DOS? */
                cp += 3;
                fullname(cp,outname,T_RAD);
                if (system(buf))
                        return(-1);
        }
        return(0);
}
Revision:	2.12
Committed:	Tue Apr 25 21:37:14 1995 UTC (29 years ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 2.11:	+189 -31 lines
Log Message:	added MGF detail geometry conversion