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

Go to the source code of this file.

Functions

int mx_data (register OBJREC *m, RAY *r)
int mx_pdata (register OBJREC *m, RAY *r)

Variables

static const char RCSid [] = "$Id: mx_data.c,v 2.9 2004/03/30 16:13:01 schorsch Exp $"

Function Documentation

int mx_data ( register OBJREC m,
RAY r 
)

Definition at line 45 of file mx_data.c.

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

       if (m->oargs.nsargs < 6)
              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);
              }
       dp = getdata(m->oargs.sarg[3]);
       i = (1 << dp->nd) - 1;
       mf = getfunc(m, 4, i<<5, 0);
       setfunc(m, r);
       errno = 0;
       for (i = 0; i < dp->nd; i++) {
              pt[i] = evalue(mf->ep[i]);
              if (errno == EDOM || errno == ERANGE)
                     goto computerr;
       }
       coef = datavalue(dp, pt);
       errno = 0;
       coef = funvalue(m->oargs.sarg[2], 1, &coef);
       if (errno == EDOM || errno == ERANGE)
              goto computerr;
       if (raymixture(r, mod[0], mod[1], coef)) {
              if (m->omod != OVOID)
                     objerror(m, USER, "inappropriate modifier");
              return(1);
       }
       return(0);
computerr:
       objerror(m, WARNING, "compute error");
       return(0);
}

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int mx_pdata ( register OBJREC m,
RAY r 
)

Definition at line 97 of file mx_data.c.

{
       OBJECT obj;
       double col[3], coef;
       double  pt[MAXDIM];
       DATARRAY  *dp;
       OBJECT  mod[2];
       register MFUNC  *mf;
       register int  i;

       if (m->oargs.nsargs < 7)
              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);
              }
       dp = getpict(m->oargs.sarg[3]);
       mf = getfunc(m, 4, 0x3<<5, 0);
       setfunc(m, r);
       errno = 0;
       pt[1] = evalue(mf->ep[0]);  /* y major ordering */
       pt[0] = evalue(mf->ep[1]);
       if (errno == EDOM || errno == ERANGE)
              goto computerr;
       for (i = 0; i < 3; i++)            /* get pixel from picture */
              col[i] = datavalue(dp+i, pt);
       errno = 0;                  /* evaluate function on pixel */
       coef = funvalue(m->oargs.sarg[2], 3, col);
       if (errno == EDOM || errno == ERANGE)
              goto computerr;
       if (raymixture(r, mod[0], mod[1], coef)) {
              if (m->omod != OVOID)
                     objerror(m, USER, "inappropriate modifier");
              return(1);
       }
       return(0);
computerr:
       objerror(m, WARNING, "compute error");
       return(0);
}

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Variable Documentation

const char RCSid[] = "$Id: mx_data.c,v 2.9 2004/03/30 16:13:01 schorsch Exp $" [static]

Definition at line 2 of file mx_data.c.