Add Valleys mapgen.

src/mapgen_valleys.h

@@ -0,0 +1,194 @@
+/*
+Minetest Valleys C
+Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+Copyright (C) 2010-2015 paramat, Matt Gregory
+Copyright (C) 2016 Duane Robertson <duane@duanerobertson.com>
+
+Based on Valleys Mapgen by Gael de Sailly
+ (https://forum.minetest.net/viewtopic.php?f=9&t=11430)
+and mapgen_v7 by kwolekr and paramat.
+
+Licensing changed by permission of Gael de Sailly.
+
+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.
+*/
+
+#ifndef MAPGEN_VALLEYS_HEADER
+#define MAPGEN_VALLEYS_HEADER
+
+#include "mapgen.h"
+
+/////////////////// Mapgen Valleys flags
+#define  MG_VALLEYS_ALT_CHILL     0x01
+#define  MG_VALLEYS_CLIFFS        0x02
+#define  MG_VALLEYS_FAST          0x04
+#define  MG_VALLEYS_HUMID_RIVERS  0x08
+#define  MG_VALLEYS_RUGGED        0x10
+
+class BiomeManager;
+
+// Global profiler
+//class Profiler;
+//extern Profiler *mapgen_profiler;
+
+
+struct MapgenValleysParams : public MapgenSpecificParams {
+	u32 spflags;
+
+	u16 altitude_chill;
+	s16 cave_water_max_height;
+	s16 humidity;
+	s16 humidity_break_point;
+	s16 lava_max_height;
+	u16 river_depth;
+	u16 river_size;
+	s16 temperature;
+	u16 water_features;
+
+	NoiseParams np_biome_heat;
+	NoiseParams np_biome_heat_blend;
+	NoiseParams np_biome_humidity;
+	NoiseParams np_biome_humidity_blend;
+	NoiseParams np_cliffs;
+	NoiseParams np_corr;
+	NoiseParams np_filler_depth;
+	NoiseParams np_inter_valley_fill;
+	NoiseParams np_inter_valley_slope;
+	NoiseParams np_rivers;
+	NoiseParams np_simple_caves_1;
+	NoiseParams np_simple_caves_2;
+	NoiseParams np_terrain_height;
+	NoiseParams np_valley_depth;
+	NoiseParams np_valley_profile;
+
+	MapgenValleysParams();
+	~MapgenValleysParams() {}
+
+	void readParams(const Settings *settings);
+	void writeParams(Settings *settings) const;
+};
+
+struct TerrainNoise {
+	s16 x; 
+	s16 z; 
+	float terrain_height; 
+	float *rivers; 
+	float *valley; 
+	float valley_profile; 
+	float *slope; 
+	float inter_valley_fill; 
+	float cliffs; 
+	float corr;
+};
+
+class MapgenValleys : public Mapgen {
+public:
+
+	MapgenValleys(int mapgenid, MapgenParams *params, EmergeManager *emerge);
+	~MapgenValleys();
+
+	virtual void makeChunk(BlockMakeData *data);
+	inline int getGroundLevelAtPoint(v2s16 p);
+
+private:
+	EmergeManager *m_emerge;
+	BiomeManager *bmgr;
+
+	int ystride;
+	int zstride;
+
+	u32 spflags;
+	bool cliff_terrain;
+	bool fast_terrain;
+	bool rugged_terrain;
+	bool humid_rivers;
+	bool use_altitude_chill;
+
+	v3s16 node_min;
+	v3s16 node_max;
+	v3s16 full_node_min;
+	v3s16 full_node_max;
+
+	Noise *noise_filler_depth;
+
+	Noise *noise_cliffs;
+	Noise *noise_corr;
+	Noise *noise_heat;
+	Noise *noise_heat_blend;
+	Noise *noise_humidity;
+	Noise *noise_humidity_blend;
+	Noise *noise_inter_valley_fill;
+	Noise *noise_inter_valley_slope;
+	Noise *noise_rivers;
+	Noise *noise_simple_caves_1;
+	Noise *noise_simple_caves_2;
+	Noise *noise_terrain_height;
+	Noise *noise_valley_depth;
+	Noise *noise_valley_profile;
+
+	float altitude_chill;
+	float cave_water_max_height;
+	float humidity_adjust;
+	float humidity_break_point;
+	float lava_max_height;
+	float river_depth;
+	float river_size;
+	float temperature_adjust;
+	s16 water_features;
+
+	content_t c_cobble;
+	content_t c_desert_stone;
+	content_t c_dirt;
+	content_t c_ice;
+	content_t c_lava_source;
+	content_t c_mossycobble;
+	content_t c_river_water_source;
+	content_t c_sand;
+	content_t c_sandstone;
+	content_t c_sandstonebrick;
+	content_t c_stair_cobble;
+	content_t c_stair_sandstonebrick;
+	content_t c_stone;
+	content_t c_water_source;
+
+	float terrainLevelAtPoint(s16 x, s16 z);
+
+	void calculateNoise();
+
+	virtual int generateTerrain();
+	float terrainLevelFromNoise(TerrainNoise *tn);
+	float adjustedTerrainLevelFromNoise(TerrainNoise *tn);
+
+	float humidityByTerrain(float humidity_base, float mount, float rivers, float valley);
+
+	MgStoneType generateBiomes(float *heat_map, float *humidity_map);
+	void dustTopNodes();
+
+	void generateSimpleCaves(s16 max_stone_y);
+};
+
+struct MapgenFactoryValleys : public MapgenFactory {
+	Mapgen *createMapgen(int mgid, MapgenParams *params, EmergeManager *emerge)
+	{
+		return new MapgenValleys(mgid, params, emerge);
+	};
+
+	MapgenSpecificParams *createMapgenParams()
+	{
+		return new MapgenValleysParams();
+	};
+};
+
+#endif