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/* RCSid $Id$ */
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/*
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* Header file for modifiers using function files.
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*
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* Include after ray.h
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*/
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#include "copyright.h"
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#include "calcomp.h"
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#define MAXEXPR 9 /* maximum expressions in modifier */
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typedef struct {
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EPNODE *ep[MAXEXPR+1]; /* NULL-terminated expression list */
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char *ctx; /* context (from file name) */
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XF *f, *b; /* forward and backward transforms */
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} MFUNC; /* material function */
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extern XF unitxf; /* identity transform */
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extern XF funcxf; /* current transform */
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#ifdef NOPROTO
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extern MFUNC *getfunc();
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extern void freefunc();
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extern int setfunc();
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extern void loadfunc();
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#else
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extern MFUNC *getfunc(OBJREC *m, int ff, unsigned int ef, int dofwd);
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extern void freefunc(OBJREC *m);
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extern int setfunc(OBJREC *m, RAY *r);
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extern void loadfunc(char *fname);
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#endif
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