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 * mandelbulb vary scaleV1
10
11 * This file has been autogenerated by tools/populateUiInformation.php
12 * from the file "fractal_mandelbulb_vary_power_v1.cpp" in the folder formula/definition
13 * D O    N O T    E D I T    T H I S    F I L E !
14 */
15
16REAL4 MandelbulbVaryPowerV1Iteration(REAL4 z, __constant sFractalCl *fractal, sExtendedAuxCl *aux)
17{
18	REAL tempVC = fractal->bulb.power; // constant to be varied
19
20	if (aux->i >= fractal->transformCommon.startIterations250
21			&& aux->i < fractal->transformCommon.stopIterations
22			&& (fractal->transformCommon.stopIterations - fractal->transformCommon.startIterations250
23					!= 0))
24	{
25		int iterationRange =
26			fractal->transformCommon.stopIterations - fractal->transformCommon.startIterations250;
27		int currentIteration = (aux->i - fractal->transformCommon.startIterations250);
28		tempVC += fractal->transformCommon.offset0 * (1.0f * currentIteration) / iterationRange;
29	}
30	if (aux->i >= fractal->transformCommon.stopIterations)
31	{
32		tempVC = (tempVC + fractal->transformCommon.offset0);
33	}
34
35	// if (aux->r < 1e-21f)
36	//	aux->r = 1e-21f;
37	REAL th0 = asin(z.z / aux->r) + fractal->bulb.betaAngleOffset;
38	REAL ph0 = atan2(z.y, z.x) + fractal->bulb.alphaAngleOffset;
39	REAL rp = native_powr(aux->r, tempVC - 1.0f);
40	REAL th = th0 * tempVC;
41	REAL ph = ph0 * tempVC;
42	REAL cth = native_cos(th);
43	aux->DE = rp * aux->DE * tempVC + 1.0f;
44	rp *= aux->r;
45	z = (REAL4){cth * native_cos(ph), cth * native_sin(ph), native_sin(th), 0.0f} * rp;
46	return z;
47}