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/* Copyright (c) 1994 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 Radiance scene description to MGF | 
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 */ | 
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#include <stdio.h> | 
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#include "platform.h" | 
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#include "standard.h" | 
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#include <ctype.h> | 
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#include <string.h> | 
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#include "fvect.h" | 
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#include <stdio.h> | 
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#include "rtprocess.h" | 
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#include "object.h" | 
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#include "color.h" | 
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#include "lookup.h" | 
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#define PI      3.14159265358979323846 | 
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#define C_1SIDEDTHICK   0.005 | 
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int     o_face(), o_cone(), o_sphere(), o_ring(), o_cylinder(); | 
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int     o_instance(), o_source(), o_illum(); | 
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int     o_plastic(), o_metal(), o_glass(), o_mirror(), o_trans(), o_light(); | 
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int     o_instance(), o_illum(); | 
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int     o_plastic(), o_metal(), o_glass(), o_dielectric(), | 
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        o_mirror(), o_trans(), o_light(); | 
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extern void     free(); | 
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extern char     *malloc(); | 
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LUTAB   rmats = LU_SINIT(free,NULL);            /* defined material table */ | 
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LUTAB   rdispatch = LU_SINIT(NULL,NULL);        /* function dispatch table */ | 
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                        fprintf(stderr, "%s: bad %s \"%s\"\n", typ, id); | 
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                        exit(1); | 
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                } | 
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        } else if (lu_find(&rmats, mod)->data != NULL)  /* make alias */ | 
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                newmat(id, mod); | 
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        } else {                                        /* unsupported */ | 
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                o_unsupported(mod, typ, id, fa); | 
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                if (lu_find(&rmats, mod)->data != NULL) /* make alias */ | 
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                        newmat(id, mod); | 
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        } | 
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} | 
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        if (end == NULL) | 
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                end = cp; | 
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                                /* copy to current object */ | 
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        for (cp = id, cp2 = curobj; cp < end; *cp2++ = *cp++) | 
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        cp2 = curobj; | 
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        if (!isalpha(*id)) {    /* start with letter */ | 
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                diff = *cp2 != 'O'; | 
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                *cp2++ = 'O'; | 
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        } | 
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        for (cp = id; cp < end; *cp2++ = *cp++) { | 
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                if ((*cp < '!') | (*cp > '~'))  /* limit to visible chars */ | 
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                        *cp = '?'; | 
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                diff += *cp != *cp2; | 
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        } | 
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        if (!diff && !*cp2) | 
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                return; | 
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        *cp2 = '\0'; | 
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        add2dispatch("tube", o_cylinder); | 
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        add2dispatch("ring", o_ring); | 
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        add2dispatch("instance", o_instance); | 
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        add2dispatch("mesh", o_instance); | 
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        add2dispatch("plastic", o_plastic); | 
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        add2dispatch("plastic2", o_plastic); | 
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        add2dispatch("metal", o_metal); | 
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        add2dispatch("metal2", o_metal); | 
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        add2dispatch("glass", o_glass); | 
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        add2dispatch("dielectric", o_dielectric); | 
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        add2dispatch("trans", o_trans); | 
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        add2dispatch("trans2", o_trans); | 
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        add2dispatch("mirror", o_mirror); | 
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        add2dispatch("spotlight", o_light); | 
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        add2dispatch("glow", o_light); | 
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        add2dispatch("illum", o_illum); | 
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        puts("# The following was converted from Radiance scene input"); | 
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        puts("# The following was converted from RADIANCE scene input"); | 
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        if (hasmult) | 
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                printf("xf -s %.4e\n", unit_mult); | 
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        printf("o %s\n", curobj); | 
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        puts("o"); | 
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        if (hasmult) | 
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                puts("xf"); | 
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        puts("# End of data converted from Radiance scene input"); | 
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        puts("# End of data converted from RADIANCE scene input"); | 
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        lu_done(&rdispatch); | 
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        lu_done(&rmats); | 
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        lu_done(&vertab); | 
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int | 
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o_unsupported(mod, typ, id, fa)         /* mark unsupported primitive */ | 
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char    *mod, *typ, *id; | 
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FUNARGS *fa; | 
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        register int    i; | 
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        fputs("\n# Unsupported RADIANCE primitive:\n", stdout); | 
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        printf("# %s %s %s", mod, typ, id); | 
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        printf("\n# %d", fa->nsargs); | 
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        for (i = 0; i < fa->nsargs; i++) | 
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                printf(" %s", fa->sarg[i]); | 
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#ifdef IARGS | 
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        printf("\n# %d", fa->niargs); | 
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        for (i = 0; i < fa->niargs; i++) | 
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                printf(" %ld", fa->iarg[i]); | 
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#else | 
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        fputs("\n# 0", stdout); | 
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#endif | 
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        printf("\n# %d", fa->nfargs); | 
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        for (i = 0; i < fa->nfargs; i++) | 
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                printf(" %g", fa->farg[i]); | 
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        fputs("\n\n", stdout); | 
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        return(0); | 
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} | 
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int | 
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o_face(mod, typ, id, fa)                /* print out a polygon */ | 
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char    *mod, *typ, *id; | 
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FUNARGS *fa; | 
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        char    entbuf[512]; | 
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        char    entbuf[2048], *linestart; | 
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        register char   *cp; | 
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        register int    i; | 
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        if (fa->nfargs < 9 | fa->nfargs % 3) | 
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        if ((fa->nfargs < 9) | (fa->nfargs % 3)) | 
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                return(-1); | 
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        setmat(mod); | 
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        setobj(id); | 
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        cp = entbuf; | 
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        cp = linestart = entbuf; | 
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        *cp++ = 'f'; | 
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        for (i = 0; i < fa->nfargs; i += 3) { | 
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                *cp++ = ' '; | 
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                if (cp - linestart > 72) { | 
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                        *cp++ = '\\'; *cp++ = '\n'; | 
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                        linestart = cp; | 
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                        *cp++ = ' '; *cp++ = ' '; | 
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                } | 
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                getvertid(cp, fa->farg + i); | 
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                while (*cp) | 
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                        cp++; | 
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int | 
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o_instance(mod, typ, id, fa)    /* convert an instance */ | 
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o_instance(mod, typ, id, fa)    /* convert an instance (or mesh) */ | 
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char    *mod, *typ, *id; | 
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FUNARGS *fa; | 
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{ | 
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int | 
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o_source(mod, typ, id, fa)      /* convert a source */ | 
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char    *mod, *typ, *id; | 
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FUNARGS *fa; | 
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{ | 
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        return(0);              /* there is no MGF equivalent! */ | 
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} | 
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int | 
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o_illum(mod, typ, id, fa)       /* convert an illum material */ | 
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char    *mod, *typ, *id; | 
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FUNARGS *fa; | 
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        newmat(id, NULL); | 
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        if (fa->nfargs == 4) | 
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                nrfr = fa->farg[3]; | 
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        printf("\tir %f 0\n", nrfr); | 
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        F = (1. - nrfr)/(1. + nrfr);            /* use normal incidence */ | 
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        F *= F; | 
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        for (i = 0; i < 3; i++) { | 
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        if (d > FTINY) | 
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                printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); | 
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        printf("\trs %.4f 0\n", cxyz[1]); | 
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        rgb_cie(cxyz, trgb);                    /* put transmitted component */ | 
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        puts("\tc"); | 
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        d = cxyz[0] + cxyz[1] + cxyz[2]; | 
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        if (d > FTINY) | 
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                printf("\t\tcxy %.4f %.4f\n", cxyz[0]/d, cxyz[1]/d); | 
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        printf("\tts %.4f 0\n", cxyz[1]); | 
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        return(0); | 
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} | 
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int | 
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o_dielectric(mod, typ, id, fa)  /* convert a dielectric material */ | 
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char    *mod, *typ, *id; | 
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register FUNARGS        *fa; | 
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{ | 
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        COLOR   cxyz, trgb; | 
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        double  F, d; | 
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        register int    i; | 
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        if (fa->nfargs != 5) | 
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                return(-1); | 
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        newmat(id, NULL); | 
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        F = (1. - fa->farg[3])/(1. + fa->farg[3]);      /* normal incidence */ | 
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        F *= F; | 
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        for (i = 0; i < 3; i++) | 
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                trgb[i] = (1. - F)*pow(fa->farg[i], C_1SIDEDTHICK/unit_mult); | 
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        printf("\tir %f 0\n", fa->farg[3]);     /* put index of refraction */ | 
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        printf("\tsides 1\n"); | 
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        puts("\tc");                            /* put reflected component */ | 
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        printf("\trs %.4f 0\n", F); | 
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        rgb_cie(cxyz, trgb);                    /* put transmitted component */ | 
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        puts("\tc"); | 
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        d = cxyz[0] + cxyz[1] + cxyz[2]; |