1/**
2 * Mandelbulber v2, a 3D fractal generator  _%}}i*<.        ____                _______
3 * Copyright (C) 2020 Mandelbulber Team   _>]|=||i=i<,     / __ \___  ___ ___  / ___/ /
4 *                                        \><||i|=>>%)    / /_/ / _ \/ -_) _ \/ /__/ /__
5 * This file is part of Mandelbulber.     )<=i=]=|=i<>    \____/ .__/\__/_//_/\___/____/
6 * The project is licensed under GPLv3,   -<>>=|><|||`        /_/
7 * see also COPYING file in this folder.    ~+{i%+++
8 *
9 * poly fold sym multi DarkBeam's version
10 * @reference
11 * DarkBeam (luca) http://www.fractalforums.com/mandelbulber/
12 * _polyfold_sym-and-polyfoldsymifs-in-mandelbulber-2/msg98162/#msg98162
13
14 * This file has been autogenerated by tools/populateUiInformation.php
15 * from the file "fractal_transf_poly_fold_sym_multi.cpp" in the folder formula/definition
16 * D O    N O T    E D I T    T H I S    F I L E !
17 */
18
19REAL4 TransfPolyFoldSymMultiIteration(REAL4 z, __constant sFractalCl *fractal, sExtendedAuxCl *aux)
20{
21	REAL4 oldZ = z;
22	// pre abs
23	if (fractal->transformCommon.functionEnabledxFalse) z.x = fabs(z.x);
24	if (fractal->transformCommon.functionEnabledyFalse) z.y = fabs(z.y);
25	if (fractal->transformCommon.functionEnabledzFalse) z.z = fabs(z.z);
26
27	int order = fractal->transformCommon.int6;
28	REAL div2PI = (REAL)order / M_PI_2x_F;
29	REAL temp = 0.0f;
30	REAL sAng = 0.0f;
31	REAL cAng = 0.0f;
32	REAL angle = 0.0f;
33	int sector;
34	if (fractal->transformCommon.functionEnabledCx)
35	{
36		bool cy = false;
37		if (!fractal->transformCommon.functionEnabledAxFalse)
38			sector = (int)(-div2PI * atan(z.x / z.y));
39		else
40			sector = (int)(-div2PI * atan2(z.x, z.y));
41		if (sector & 1) cy = true;
42		angle = (REAL)(sector / div2PI);
43		temp = z.x;
44		sAng = native_sin(angle);
45		cAng = native_cos(angle);
46		z.x = z.x * cAng - z.y * sAng;
47		z.y = temp * sAng + z.y * cAng;
48		if (cy == true) z.y = -z.y;
49		/*if (fractal->transformCommon.functionEnabledFalse)
50		{
51			if ((order&1) && (sector == 0)) z.y = fabs(z.y); // more continuous?
52			else if (cy == true) z.y = -z.y;
53		}
54		else if (cy == true) z.y = -z.y;*/
55	}
56	if (fractal->transformCommon.functionEnabledCyFalse)
57	{
58		bool cz = false;
59		if (!fractal->transformCommon.functionEnabledAyFalse)
60			sector = (int)(-div2PI * atan(z.y / z.z));
61		else
62			sector = (int)(-div2PI * atan2(z.y, z.z));
63		if (sector & 1) cz = true;
64		angle = (REAL)(sector / div2PI);
65		temp = z.y;
66		sAng = native_sin(angle);
67		cAng = native_cos(angle);
68		z.y = z.y * cAng - z.z * sAng;
69		z.z = temp * sAng + z.z * cAng;
70		if (cz == true) z.z = -z.z;
71	}
72	if (fractal->transformCommon.functionEnabledCzFalse)
73	{
74		bool cx = false;
75		if (!fractal->transformCommon.functionEnabledAzFalse)
76			sector = (int)(-div2PI * atan(z.z / z.x));
77		else
78			sector = (int)(-div2PI * atan2(z.z, z.x));
79		if (sector & 1) cx = true;
80		angle = (REAL)(sector / div2PI);
81		temp = z.z;
82		sAng = native_sin(angle);
83		cAng = native_cos(angle);
84		z.z = z.z * cAng - z.x * sAng;
85		z.x = temp * sAng + z.x * cAng;
86		if (cx == true) z.x = -z.x;
87	}
88
89	z += fractal->transformCommon.additionConstant000;
90
91	if (fractal->analyticDE.enabled)
92	{
93		if (!fractal->analyticDE.enabledFalse)
94			aux->DE = aux->DE * fractal->analyticDE.scale1 + fractal->analyticDE.offset0;
95		else
96		{
97			REAL avgScale = length(z) / length(oldZ);
98			aux->DE = aux->DE * avgScale * fractal->analyticDE.scale1 + fractal->analyticDE.offset0;
99		}
100	}
101	return z;
102}