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/****************************************************************************
* fractal.h
*
* This module contains all defines, typedefs, and prototypes for FRACTAL.CPP.
*
* from Persistence of Vision(tm) Ray Tracer version 3.6.
* Copyright 1991-2003 Persistence of Vision Team
* Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
*---------------------------------------------------------------------------
* NOTICE: This source code file is provided so that users may experiment
* with enhancements to POV-Ray and to port the software to platforms other
* than those supported by the POV-Ray developers. There are strict rules
* regarding how you are permitted to use this file. These rules are contained
* in the distribution and derivative versions licenses which should have been
* provided with this file.
*
* These licences may be found online, linked from the end-user license
* agreement that is located at http://www.povray.org/povlegal.html
*---------------------------------------------------------------------------
* This program is based on the popular DKB raytracer version 2.12.
* DKBTrace was originally written by David K. Buck.
* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
*---------------------------------------------------------------------------
* $File: //depot/povray/3.6-release/source/fractal.h $
* $Revision: #2 $
* $Change: 2939 $
* $DateTime: 2004/07/04 13:43:26 $
* $Author: root $
* $Log$
*****************************************************************************/
#ifndef FRACTAL_H
#define FRACTAL_H
BEGIN_POV_NAMESPACE
/*****************************************************************************
* Global preprocessor defines
******************************************************************************/
#define QUATERNION_TYPE 0
#define HYPERCOMPLEX_TYPE 1
/* Hcmplx function stypes must come first */
#define EXP_STYPE 0
#define LN_STYPE 1
#define SIN_STYPE 2
#define ASIN_STYPE 3
#define COS_STYPE 4
#define ACOS_STYPE 5
#define TAN_STYPE 6
#define ATAN_STYPE 7
#define SINH_STYPE 8
#define ASINH_STYPE 9
#define COSH_STYPE 10
#define ACOSH_STYPE 11
#define TANH_STYPE 12
#define ATANH_STYPE 13
#define PWR_STYPE 14
/* end function stypes */
#define SQR_STYPE 15
#define CUBE_STYPE 16
#define RECIPROCAL_STYPE 17
#define Iteration(V,F) ( (*((F)->Iteration_Method))(V,F) )
#define Normal_Calc(F,V) ( (*((F)->Normal_Calc_Method))(V,(F)->n,F) )
#define F_Bound(R,F,dm,dM) ( (*((F)->F_Bound_Method))(R,F,dm,dM) )
#define D_Iteration(V,F,D) ( (*((F)->D_Iteration_Method))(V,F,D) )
#define Complex_Function(t,s,F) ( (*((F)->Complex_Function_Method))(t,s) )
/*****************************************************************************
* Global typedefs
******************************************************************************/
typedef struct Fractal_Struct FRACTAL;
typedef struct cmplx { DBL x,y; } CMPLX;
typedef void (*NORMAL_CALC_METHOD) (VECTOR, int, FRACTAL *);
typedef int (*ITERATION_METHOD) (VECTOR, FRACTAL *);
typedef int (*D_ITERATION_METHOD) (VECTOR, FRACTAL *, DBL *);
typedef int (*F_BOUND_METHOD) (RAY *, FRACTAL *, DBL *, DBL *);
typedef void (*COMPLEX_FUNCTION_METHOD) (CMPLX *, CMPLX *);
struct Fractal_Struct
{
OBJECT_FIELDS
VECTOR Center;
DBL Julia_Parm[4];
DBL Slice[4]; /* vector perpendicular to slice plane */
DBL SliceDist; /* distance from slice plane to origin */
DBL Exit_Value;
int n; /* number of iterations */
DBL Precision; /* Precision value */
int Inverted;
int Algebra; /* Quaternion or Hypercomplex */
int Sub_Type;
CMPLX exponent; /* exponent of power function */
NORMAL_CALC_METHOD Normal_Calc_Method;
ITERATION_METHOD Iteration_Method;
D_ITERATION_METHOD D_Iteration_Method;
F_BOUND_METHOD F_Bound_Method;
COMPLEX_FUNCTION_METHOD Complex_Function_Method;
DBL Radius_Squared; /* For F_Bound(), if needed */
};
/*****************************************************************************
* Global variables
******************************************************************************/
extern DBL *Sx, *Sy, *Sz, *Sw;
extern DBL Precision;
extern VECTOR Direction;
/*****************************************************************************
* Global functions
******************************************************************************/
FRACTAL *Create_Fractal (void);
void SetUp_Fractal (FRACTAL * Fractal);
void Allocate_Iteration_Stack (int n);
void Free_Iteration_Stack (void);
END_POV_NAMESPACE
#endif
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