/**
 * Mandelbulber v2, a 3D fractal generator  _%}}i*<.        ____                _______
 * Copyright (C) 2018 Mandelbulber Team   _>]|=||i=i<,     / __ \___  ___ ___  / ___/ /
 *                                        \><||i|=>>%)    / /_/ / _ \/ -_) _ \/ /__/ /__
 * This file is part of Mandelbulber.     )<=i=]=|=i<>    \____/ .__/\__/_//_/\___/____/
 * The project is licensed under GPLv3,   -<>>=|><|||`        /_/
 * see also COPYING file in this folder.    ~+{i%+++
 *
 * MsltoeSym3Mod based on the formula from Mandelbulb3D
 * @reference http://www.fractalforums.com/theory/choosing-the-squaring-formula-by-location/15/

 * This file has been autogenerated by tools/populateUiInformation.php
 * from the function "MsltoeSym3ModIteration" in the file fractal_formulas.cpp
 * D O    N O T    E D I T    T H I S    F I L E !
 */

REAL4 MsltoeSym3ModIteration(REAL4 z, __constant sFractalCl *fractal, sExtendedAuxCl *aux)
{
	REAL4 c = aux->const_c;
	aux->DE = aux->DE * 2.0f * aux->r;
	REAL4 temp = z;
	if (fabs(z.y) < fabs(z.z)) // then swap
	{
		z.y = temp.z; // making z.y furthest away from axis
		z.z = temp.y;
	}
	if (z.y > z.z) // then change sign of z.x and z.z
	{
		z.x = -z.x;
		z.z = -z.z;
	}
	REAL4 z2 = z * z; // squares
	REAL v3 = mad(z2.z, fractal->transformCommon.scale0 * fractal->transformCommon.scale0 * z2.y,
		(z2.x + z2.y + z2.z));
	; // sum of squares
	// if (v3 < 1e-21f && v3 > -1e-21f) v3 = (v3 > 0) ? 1e-21f : -1e-21f;
	REAL zr = 1.0f - native_divide(z2.z, v3);
	temp.x = (z2.x - z2.y) * zr;
	temp.y = 2.0f * z.x * z.y * zr * fractal->transformCommon.scale; // scaling temp.y
	temp.z = 2.0f * z.z * native_sqrt(z2.x + z2.y);

	z = temp + fractal->transformCommon.additionConstant000;

	if (fractal->transformCommon.addCpixelEnabledFalse)
	{
		REAL4 tempFAB = c;
		if (fractal->transformCommon.functionEnabledx) tempFAB.x = fabs(tempFAB.x);
		if (fractal->transformCommon.functionEnabledy) tempFAB.y = fabs(tempFAB.y);
		if (fractal->transformCommon.functionEnabledz) tempFAB.z = fabs(tempFAB.z);

		tempFAB *= fractal->transformCommon.constantMultiplier000;
		z.x += sign(z.x) * tempFAB.x;
		z.y += sign(z.y) * tempFAB.y;
		z.z += sign(z.z) * tempFAB.z;
	}
	REAL lengthTempZ = -length(z);
	// if (lengthTempZ > -1e-21f) lengthTempZ = -1e-21f;   //  z is neg.)
	z *= 1.0f + native_divide(fractal->transformCommon.offset, lengthTempZ);
	z *= fractal->transformCommon.scale1;
	aux->DE = mad(aux->DE, fabs(fractal->transformCommon.scale1), 1.0f);

	if (fractal->transformCommon.functionEnabledFalse // quaternion fold
			&& aux->i >= fractal->transformCommon.startIterationsA
			&& aux->i < fractal->transformCommon.stopIterationsA)
	{
		aux->r = length(z);
		aux->DE = aux->DE * 2.0f * aux->r;
		z = (REAL4){z.x * z.x - z.y * z.y - z.z * z.z, z.x * z.y, z.x * z.z, z.w};

		if (fractal->analyticDE.enabledFalse)
		{
			REAL4 temp2 = z;
			REAL tempL = length(temp2);
			z *= (REAL4){1.0f, 2.0f, 2.0f, 1.0f};
			// if (tempL < 1e-21f) tempL = 1e-21f;
			REAL avgScale = native_divide(length(z), tempL);
			// aux->DE *= avgScale * fractal->transformCommon.scaleA1;
			REAL tempAux = aux->DE * avgScale;
			aux->DE = mad(fractal->analyticDE.scale1, (tempAux - aux->DE), aux->DE);
		}
		else
		{
			z *= (REAL4){1.0f, 2.0f, 2.0f, 1.0f};
		}
	}
	return z;
}