Move files to subdirectories (#6599)

* Move files around

src/mapgen/mapgen_fractal.h

@@ -0,0 +1,87 @@
+/*
+Minetest
+Copyright (C) 2015-2017 paramat
+Copyright (C) 2015-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+
+Fractal formulas from http://www.bugman123.com/Hypercomplex/index.html
+by Paul Nylander, and from http://www.fractalforums.com, thank you.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#include "mapgen.h"
+
+class BiomeManager;
+
+extern FlagDesc flagdesc_mapgen_fractal[];
+
+struct MapgenFractalParams : public MapgenParams
+{
+	u32 spflags = 0;
+	float cave_width = 0.09f;
+	s16 large_cave_depth = -33;
+	s16 lava_depth = -256;
+	u16 fractal = 1;
+	u16 iterations = 11;
+	v3f scale = v3f(4096.0, 1024.0, 4096.0);
+	v3f offset = v3f(1.52, 0.0, 0.0);
+	float slice_w = 0.0f;
+	float julia_x = 0.267f;
+	float julia_y = 0.2f;
+	float julia_z = 0.133f;
+	float julia_w = 0.067f;
+	NoiseParams np_seabed;
+	NoiseParams np_filler_depth;
+	NoiseParams np_cave1;
+	NoiseParams np_cave2;
+
+	MapgenFractalParams();
+	~MapgenFractalParams() = default;
+
+	void readParams(const Settings *settings);
+	void writeParams(Settings *settings) const;
+};
+
+class MapgenFractal : public MapgenBasic
+{
+public:
+	MapgenFractal(int mapgenid, MapgenFractalParams *params, EmergeManager *emerge);
+	~MapgenFractal();
+
+	virtual MapgenType getType() const { return MAPGEN_FRACTAL; }
+
+	virtual void makeChunk(BlockMakeData *data);
+	int getSpawnLevelAtPoint(v2s16 p);
+	bool getFractalAtPoint(s16 x, s16 y, s16 z);
+	s16 generateTerrain();
+
+private:
+	u16 formula;
+	bool julia;
+
+	s16 large_cave_depth;
+	u16 fractal;
+	u16 iterations;
+	v3f scale;
+	v3f offset;
+	float slice_w;
+	float julia_x;
+	float julia_y;
+	float julia_z;
+	float julia_w;
+	Noise *noise_seabed;
+};