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radiance  4R0+20100331
Functions | Variables
mx_func.c File Reference
#include "copyright.h"
#include "ray.h"
#include "func.h"
#include "rtotypes.h"

Go to the source code of this file.

Functions

int mx_func (register OBJREC *m, RAY *r)

Variables

static const char RCSid [] = "$Id: mx_func.c,v 2.8 2004/03/30 16:13:01 schorsch Exp $"

Function Documentation

int mx_func ( register OBJREC m,
RAY r 
)

Definition at line 30 of file mx_func.c.

{
       OBJECT obj;
       register int  i;
       double  coef;
       OBJECT  mod[2];
       register MFUNC  *mf;

       if (m->oargs.nsargs < 4)
              objerror(m, USER, "bad # arguments");
       obj = objndx(m);
       for (i = 0; i < 2; i++)
              if (!strcmp(m->oargs.sarg[i], VOIDID))
                     mod[i] = OVOID;
              else if ((mod[i] = lastmod(obj, m->oargs.sarg[i])) == OVOID) {
                     sprintf(errmsg, "undefined modifier \"%s\"",
                                   m->oargs.sarg[i]);
                     objerror(m, USER, errmsg);
              }
       mf = getfunc(m, 3, 0x4, 0);
       setfunc(m, r);
       errno = 0;
       coef = evalue(mf->ep[0]);
       if (errno == EDOM || errno == ERANGE) {
              objerror(m, WARNING, "compute error");
              return(0);
       }
       if (raymixture(r, mod[0], mod[1], coef)) {
              if (m->omod != OVOID)
                     objerror(m, USER, "inappropriate modifier");
              return(1);
       }
       return(0);
}

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Variable Documentation

const char RCSid[] = "$Id: mx_func.c,v 2.8 2004/03/30 16:13:01 schorsch Exp $" [static]

Definition at line 2 of file mx_func.c.