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/* RCSid $Id: func.h,v 2.10 2015/05/20 12:58:31 greg Exp $ */
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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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#ifndef _RAD_FUNC_H_
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#define _RAD_FUNC_H_
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#include "calcomp.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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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 *fxp, *bxp; /* 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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extern void initfunc(void);
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extern void set_eparams(const char *prms);
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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 int worldfunc(const char *ctx, RAY *r);
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extern void loadfunc(char *fname);
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/* defined in noise3.c */
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extern void setnoisefuncs(void);
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/* defined in fprism.c */
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extern void setprismfuncs(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_FUNC_H_ */
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