X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fmapgen_v7.cpp;h=e6801a24b75293ad38db2838cbb8894274803675;hb=6151f7bc4b32c2576035bd3381bd81ae287c57eb;hp=af453c2ec6d0a3a4c21441bfed6626ab6aa61d72;hpb=8ec3fc35c656544a55f7f8ece9359c9e2b472e8f;p=dragonfireclient.git

diff --git a/src/mapgen_v7.cpp b/src/mapgen_v7.cpp
index af453c2ec..e6801a24b 100644
--- a/src/mapgen_v7.cpp
+++ b/src/mapgen_v7.cpp
@@ -1,6 +1,7 @@
 /*
 Minetest
-Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+Copyright (C) 2010-2015 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+Copyright (C) 2010-2015 paramat, Matt Gregory
 
 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
@@ -24,381 +25,585 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "mapblock.h"
 #include "mapnode.h"
 #include "map.h"
-//#include "serverobject.h"
 #include "content_sao.h"
 #include "nodedef.h"
-#include "content_mapnode.h" // For content_mapnode_get_new_name
 #include "voxelalgorithms.h"
-#include "profiler.h"
+//#include "profiler.h" // For TimeTaker
 #include "settings.h" // For g_settings
-#include "main.h" // For g_profiler
 #include "emerge.h"
 #include "dungeongen.h"
+#include "cavegen.h"
 #include "treegen.h"
-#include "biome.h"
+#include "mg_biome.h"
+#include "mg_ore.h"
+#include "mg_decoration.h"
 #include "mapgen_v7.h"
 
 
-/////////////////// Mapgen V7 perlin noise default values
-NoiseParams nparams_v7_def_terrain_base =
-	{0, 80.0, v3f(250.0, 250.0, 250.0), 82341, 5, 0.6};
-NoiseParams nparams_v7_def_terrain_alt =
-	{0, 20.0, v3f(250.0, 250.0, 250.0), 5934, 5, 0.6};
-NoiseParams nparams_v7_def_terrain_mod =
-	{0, 1.0, v3f(350.0, 350.0, 350.0), 85039, 5, 0.6};
-NoiseParams nparams_v7_def_terrain_persist =
-	{0, 1.0, v3f(500.0, 500.0, 500.0), 539, 3, 0.6};
-NoiseParams nparams_v7_def_height_select =
-	{0.5, 0.5, v3f(250.0, 250.0, 250.0), 4213, 5, 0.69};
-NoiseParams nparams_v7_def_ridge =
-	{0.5, 1.0, v3f(100.0, 100.0, 100.0), 6467, 4, 0.75};
-/*
-NoiseParams nparams_v6_def_beach =
-	{0.0, 1.0, v3f(250.0, 250.0, 250.0), 59420, 3, 0.50};
-NoiseParams nparams_v6_def_cave =
-	{6.0, 6.0, v3f(250.0, 250.0, 250.0), 34329, 3, 0.50};
-NoiseParams nparams_v6_def_humidity =
-	{0.5, 0.5, v3f(500.0, 500.0, 500.0), 72384, 4, 0.66};
-NoiseParams nparams_v6_def_trees =
-	{0.0, 1.0, v3f(125.0, 125.0, 125.0), 2, 4, 0.66};
-NoiseParams nparams_v6_def_apple_trees =
-	{0.0, 1.0, v3f(100.0, 100.0, 100.0), 342902, 3, 0.45};
-*/
+FlagDesc flagdesc_mapgen_v7[] = {
+	{"mountains", MGV7_MOUNTAINS},
+	{"ridges",    MGV7_RIDGES},
+	{NULL,        0}
+};
+
+
 ///////////////////////////////////////////////////////////////////////////////
 
 
-MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge) {
-	this->generating  = false;
-	this->id     = mapgenid;
-	this->emerge = emerge;
-	this->bmgr   = emerge->biomedef;
+MapgenV7::MapgenV7(int mapgenid, MapgenParams *params, EmergeManager *emerge)
+	: MapgenBasic(mapgenid, params, emerge)
+{
+	this->m_emerge = emerge;
+	this->bmgr     = emerge->biomemgr;
 
-	this->seed     = (int)params->seed;
-	this->water_level = params->water_level;
-	this->flags   = params->flags;
-	this->csize   = v3s16(1, 1, 1) * params->chunksize * MAP_BLOCKSIZE;
-//	this->ystride = csize.X; //////fix this
+	//// amount of elements to skip for the next index
+	//// for noise/height/biome maps (not vmanip)
+	this->ystride = csize.X;
+	// 1-up 1-down overgeneration
+	this->zstride_1u1d = csize.X * (csize.Y + 2);
+	// 1-down overgeneration
+	this->zstride_1d = csize.X * (csize.Y + 1);
 
-	this->biomemap  = new u8[csize.X * csize.Z];
-	this->heightmap = new s16[csize.X * csize.Z];
+	this->heightmap       = new s16[csize.X * csize.Z];
 	this->ridge_heightmap = new s16[csize.X * csize.Z];
 
-	// Terrain noise
-	noise_terrain_base    = new Noise(params->np_terrain_base,    seed, csize.X, csize.Z);
-	noise_terrain_alt     = new Noise(params->np_terrain_alt,     seed, csize.X, csize.Z);
-	noise_terrain_mod     = new Noise(params->np_terrain_mod,     seed, csize.X, csize.Z);
-	noise_terrain_persist = new Noise(params->np_terrain_persist, seed, csize.X, csize.Z);
-	noise_height_select   = new Noise(params->np_height_select,   seed, csize.X, csize.Z);
-	noise_ridge           = new Noise(params->np_ridge, seed, csize.X, csize.Y, csize.Z);
-	
-	// Biome noise
-	noise_heat     = new Noise(bmgr->np_heat,     seed, csize.X, csize.Z);
-	noise_humidity = new Noise(bmgr->np_humidity, seed, csize.X, csize.Z);	
+	MapgenV7Params *sp = (MapgenV7Params *)params->sparams;
+
+	this->spflags    = sp->spflags;
+	this->cave_width = sp->cave_width;
+
+	//// Terrain noise
+	noise_terrain_base    = new Noise(&sp->np_terrain_base,    seed, csize.X, csize.Z);
+	noise_terrain_alt     = new Noise(&sp->np_terrain_alt,     seed, csize.X, csize.Z);
+	noise_terrain_persist = new Noise(&sp->np_terrain_persist, seed, csize.X, csize.Z);
+	noise_height_select   = new Noise(&sp->np_height_select,   seed, csize.X, csize.Z);
+	noise_filler_depth    = new Noise(&sp->np_filler_depth,    seed, csize.X, csize.Z);
+	noise_mount_height    = new Noise(&sp->np_mount_height,    seed, csize.X, csize.Z);
+	noise_ridge_uwater    = new Noise(&sp->np_ridge_uwater,    seed, csize.X, csize.Z);
+
+	//// 3d terrain noise
+	// 1-up 1-down overgeneration
+	noise_mountain = new Noise(&sp->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
+	noise_ridge    = new Noise(&sp->np_ridge,    seed, csize.X, csize.Y + 2, csize.Z);
+	// 1-down overgeneraion
+	noise_cave1    = new Noise(&sp->np_cave1,    seed, csize.X, csize.Y + 1, csize.Z);
+	noise_cave2    = new Noise(&sp->np_cave2,    seed, csize.X, csize.Y + 1, csize.Z);
+
+	// TODO(hmmmm): should we have a way to disable biomemanager biomes?
+	//// Initialize biome generator
+	biomegen = emerge->biomemgr->createBiomeGen(
+		BIOMEGEN_ORIGINAL, params->bparams, csize);
+	biomemap = biomegen->biomemap;
+
+	//// Resolve nodes to be used
+	c_stone                = ndef->getId("mapgen_stone");
+	c_water_source         = ndef->getId("mapgen_water_source");
+	c_lava_source          = ndef->getId("mapgen_lava_source");
+	c_desert_stone         = ndef->getId("mapgen_desert_stone");
+	c_ice                  = ndef->getId("mapgen_ice");
+	c_sandstone            = ndef->getId("mapgen_sandstone");
+
+	c_cobble               = ndef->getId("mapgen_cobble");
+	c_stair_cobble         = ndef->getId("mapgen_stair_cobble");
+	c_mossycobble          = ndef->getId("mapgen_mossycobble");
+	c_sandstonebrick       = ndef->getId("mapgen_sandstonebrick");
+	c_stair_sandstonebrick = ndef->getId("mapgen_stair_sandstonebrick");
+
+	if (c_ice == CONTENT_IGNORE)
+		c_ice = CONTENT_AIR;
+	if (c_mossycobble == CONTENT_IGNORE)
+		c_mossycobble = c_cobble;
+	if (c_stair_cobble == CONTENT_IGNORE)
+		c_stair_cobble = c_cobble;
+	if (c_sandstonebrick == CONTENT_IGNORE)
+		c_sandstonebrick = c_sandstone;
+	if (c_stair_sandstonebrick == CONTENT_IGNORE)
+		c_stair_sandstonebrick = c_sandstone;
 }
 
 
-MapgenV7::~MapgenV7() {
+MapgenV7::~MapgenV7()
+{
 	delete noise_terrain_base;
-	delete noise_terrain_mod;
 	delete noise_terrain_persist;
 	delete noise_height_select;
 	delete noise_terrain_alt;
+	delete noise_filler_depth;
+	delete noise_mount_height;
+	delete noise_ridge_uwater;
+	delete noise_mountain;
 	delete noise_ridge;
-	delete noise_heat;
-	delete noise_humidity;
-	
+	delete noise_cave1;
+	delete noise_cave2;
+
+	delete biomegen;
+
 	delete[] ridge_heightmap;
 	delete[] heightmap;
-	delete[] biomemap;
 }
 
 
-int MapgenV7::getGroundLevelAtPoint(v2s16 p) {
-	return 20;
+MapgenV7Params::MapgenV7Params()
+{
+	spflags    = MGV7_MOUNTAINS | MGV7_RIDGES;
+	cave_width = 0.3;
+
+	np_terrain_base    = NoiseParams(4,    70,  v3f(600,  600,  600),  82341, 5, 0.6,  2.0);
+	np_terrain_alt     = NoiseParams(4,    25,  v3f(600,  600,  600),  5934,  5, 0.6,  2.0);
+	np_terrain_persist = NoiseParams(0.6,  0.1, v3f(2000, 2000, 2000), 539,   3, 0.6,  2.0);
+	np_height_select   = NoiseParams(-8,   16,  v3f(500,  500,  500),  4213,  6, 0.7,  2.0);
+	np_filler_depth    = NoiseParams(0,    1.2, v3f(150,  150,  150),  261,   3, 0.7,  2.0);
+	np_mount_height    = NoiseParams(256,  112, v3f(1000, 1000, 1000), 72449, 3, 0.6,  2.0);
+	np_ridge_uwater    = NoiseParams(0,    1,   v3f(1000, 1000, 1000), 85039, 5, 0.6,  2.0);
+	np_mountain        = NoiseParams(-0.6, 1,   v3f(250,  350,  250),  5333,  5, 0.63, 2.0);
+	np_ridge           = NoiseParams(0,    1,   v3f(100,  100,  100),  6467,  4, 0.75, 2.0);
+	np_cave1           = NoiseParams(0,    12,  v3f(96,   96,   96),   52534, 4, 0.5,  2.0);
+	np_cave2           = NoiseParams(0,    12,  v3f(96,   96,   96),   10325, 4, 0.5,  2.0);
+}
+
+
+void MapgenV7Params::readParams(const Settings *settings)
+{
+	settings->getFlagStrNoEx("mgv7_spflags",  spflags, flagdesc_mapgen_v7);
+	settings->getFloatNoEx("mgv7_cave_width", cave_width);
+
+	settings->getNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
+	settings->getNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
+	settings->getNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
+	settings->getNoiseParams("mgv7_np_height_select",   np_height_select);
+	settings->getNoiseParams("mgv7_np_filler_depth",    np_filler_depth);
+	settings->getNoiseParams("mgv7_np_mount_height",    np_mount_height);
+	settings->getNoiseParams("mgv7_np_ridge_uwater",    np_ridge_uwater);
+	settings->getNoiseParams("mgv7_np_mountain",        np_mountain);
+	settings->getNoiseParams("mgv7_np_ridge",           np_ridge);
+	settings->getNoiseParams("mgv7_np_cave1",           np_cave1);
+	settings->getNoiseParams("mgv7_np_cave2",           np_cave2);
+}
+
+
+void MapgenV7Params::writeParams(Settings *settings) const
+{
+	settings->setFlagStr("mgv7_spflags",  spflags, flagdesc_mapgen_v7, U32_MAX);
+	settings->setFloat("mgv7_cave_width", cave_width);
+
+	settings->setNoiseParams("mgv7_np_terrain_base",    np_terrain_base);
+	settings->setNoiseParams("mgv7_np_terrain_alt",     np_terrain_alt);
+	settings->setNoiseParams("mgv7_np_terrain_persist", np_terrain_persist);
+	settings->setNoiseParams("mgv7_np_height_select",   np_height_select);
+	settings->setNoiseParams("mgv7_np_filler_depth",    np_filler_depth);
+	settings->setNoiseParams("mgv7_np_mount_height",    np_mount_height);
+	settings->setNoiseParams("mgv7_np_ridge_uwater",    np_ridge_uwater);
+	settings->setNoiseParams("mgv7_np_mountain",        np_mountain);
+	settings->setNoiseParams("mgv7_np_ridge",           np_ridge);
+	settings->setNoiseParams("mgv7_np_cave1",           np_cave1);
+	settings->setNoiseParams("mgv7_np_cave2",           np_cave2);
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+int MapgenV7::getSpawnLevelAtPoint(v2s16 p)
+{
+	// Base terrain calculation
+	s16 y = baseTerrainLevelAtPoint(p.X, p.Y);
+
+	// Ridge/river terrain calculation
+	float width = 0.2;
+	float uwatern = NoisePerlin2D(&noise_ridge_uwater->np, p.X, p.Y, seed) * 2;
+	// if inside a river this is an unsuitable spawn point
+	if (fabs(uwatern) <= width)
+		return MAX_MAP_GENERATION_LIMIT;
+
+	// Mountain terrain calculation
+	int iters = 128;
+	while (iters--) {
+		if (!getMountainTerrainAtPoint(p.X, y + 1, p.Y)) {  // Air, y is ground level
+			if (y <= water_level || y > water_level + 16)
+				return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
+			else
+				return y;
+		}
+		y++;
+	}
+
+	// Unsuitable spawn point, no ground surface found
+	return MAX_MAP_GENERATION_LIMIT;
 }
 
 
-void MapgenV7::makeChunk(BlockMakeData *data) {
+void MapgenV7::makeChunk(BlockMakeData *data)
+{
+	// Pre-conditions
 	assert(data->vmanip);
 	assert(data->nodedef);
 	assert(data->blockpos_requested.X >= data->blockpos_min.X &&
-		   data->blockpos_requested.Y >= data->blockpos_min.Y &&
-		   data->blockpos_requested.Z >= data->blockpos_min.Z);
+		data->blockpos_requested.Y >= data->blockpos_min.Y &&
+		data->blockpos_requested.Z >= data->blockpos_min.Z);
 	assert(data->blockpos_requested.X <= data->blockpos_max.X &&
-		   data->blockpos_requested.Y <= data->blockpos_max.Y &&
-		   data->blockpos_requested.Z <= data->blockpos_max.Z);
-			
+		data->blockpos_requested.Y <= data->blockpos_max.Y &&
+		data->blockpos_requested.Z <= data->blockpos_max.Z);
+
 	this->generating = true;
-	this->vm   = data->vmanip;	
+	this->vm   = data->vmanip;
 	this->ndef = data->nodedef;
 	//TimeTaker t("makeChunk");
-	
+
 	v3s16 blockpos_min = data->blockpos_min;
 	v3s16 blockpos_max = data->blockpos_max;
-	v3s16 blockpos_full_min = blockpos_min - v3s16(1, 1, 1);
-	v3s16 blockpos_full_max = blockpos_max + v3s16(1, 1, 1);
 	node_min = blockpos_min * MAP_BLOCKSIZE;
 	node_max = (blockpos_max + v3s16(1, 1, 1)) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 	full_node_min = (blockpos_min - 1) * MAP_BLOCKSIZE;
 	full_node_max = (blockpos_max + 2) * MAP_BLOCKSIZE - v3s16(1, 1, 1);
 
-	//blockseed = emerge->getBlockSeed(full_node_min);
+	blockseed = getBlockSeed2(full_node_min, seed);
 
 	// Make some noise
 	calculateNoise();
 
-	// Calculate height map
-	s16 stone_surface_max_y = calcHeightMap();
-	
-	// Calculate biomes
-	BiomeNoiseInput binput;
-	binput.mapsize       = v2s16(csize.X, csize.Z);
-	binput.heat_map      = noise_heat->result;
-	binput.humidity_map  = noise_humidity->result;
-	binput.height_map    = heightmap;
-	bmgr->calcBiomes(&binput, biomemap);
-	
-	c_stone           = ndef->getId("mapgen_stone");
-	c_dirt            = ndef->getId("mapgen_dirt");
-	c_dirt_with_grass = ndef->getId("mapgen_dirt_with_grass");
-	c_sand            = ndef->getId("mapgen_sand");
-	c_water_source    = ndef->getId("mapgen_water_source");
-	
-	generateTerrain();
-	carveRidges();
-	
-	//carveRivers();
-	addTopNodes();
-	growGrass();
-	
-	//v3s16 central_area_size = node_max - node_min + v3s16(1,1,1);
-
-	if (flags & MG_DUNGEONS) {
-		DungeonGen dgen(ndef, data->seed, water_level);
-		dgen.generate(vm, blockseed, full_node_min, full_node_max);
-	}
+	// Generate terrain and ridges with initial heightmaps
+	s16 stone_surface_max_y = generateTerrain();
+
+	if (spflags & MGV7_RIDGES)
+		generateRidgeTerrain();
+
+	// Update heightmap to include mountain terrain
+	updateHeightmap(node_min, node_max);
+
+	// Init biome generator, place biome-specific nodes, and build biomemap
+	biomegen->calcBiomeNoise(node_min);
+	biomegen->getBiomes(heightmap);
+	MgStoneType stone_type = generateBiomes();
+
+	if (flags & MG_CAVES)
+		generateCaves(stone_surface_max_y, water_level);
+
+	if ((flags & MG_DUNGEONS) && (stone_surface_max_y >= node_min.Y)) {
+		DungeonParams dp;
+
+		dp.np_rarity  = nparams_dungeon_rarity;
+		dp.np_density = nparams_dungeon_density;
+		dp.np_wetness = nparams_dungeon_wetness;
+		dp.c_water    = c_water_source;
+		if (stone_type == MGSTONE_STONE) {
+			dp.c_cobble = c_cobble;
+			dp.c_moss   = c_mossycobble;
+			dp.c_stair  = c_stair_cobble;
+
+			dp.diagonal_dirs = false;
+			dp.mossratio     = 3.0;
+			dp.holesize      = v3s16(1, 2, 1);
+			dp.roomsize      = v3s16(0, 0, 0);
+			dp.notifytype    = GENNOTIFY_DUNGEON;
+		} else if (stone_type == MGSTONE_DESERT_STONE) {
+			dp.c_cobble = c_desert_stone;
+			dp.c_moss   = c_desert_stone;
+			dp.c_stair  = c_desert_stone;
+
+			dp.diagonal_dirs = true;
+			dp.mossratio     = 0.0;
+			dp.holesize      = v3s16(2, 3, 2);
+			dp.roomsize      = v3s16(2, 5, 2);
+			dp.notifytype    = GENNOTIFY_TEMPLE;
+		} else if (stone_type == MGSTONE_SANDSTONE) {
+			dp.c_cobble = c_sandstonebrick;
+			dp.c_moss   = c_sandstonebrick;
+			dp.c_stair  = c_sandstonebrick;
+
+			dp.diagonal_dirs = false;
+			dp.mossratio     = 0.0;
+			dp.holesize      = v3s16(2, 2, 2);
+			dp.roomsize      = v3s16(2, 0, 2);
+			dp.notifytype    = GENNOTIFY_DUNGEON;
+		}
 
-	for (size_t i = 0; i != emerge->ores.size(); i++) {
-		Ore *ore = emerge->ores[i];
-		ore->generate(this, blockseed + i, node_min, node_max);
+		DungeonGen dgen(this, &dp);
+		dgen.generate(blockseed, full_node_min, full_node_max);
 	}
-	
+
+	// Generate the registered decorations
+	if (flags & MG_DECORATIONS)
+		m_emerge->decomgr->placeAllDecos(this, blockseed, node_min, node_max);
+
+	// Generate the registered ores
+	m_emerge->oremgr->placeAllOres(this, blockseed, node_min, node_max);
+
+	// Sprinkle some dust on top after everything else was generated
+	dustTopNodes();
+
 	//printf("makeChunk: %dms\n", t.stop());
-	
+
 	updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
-	calcLighting(node_min, node_max);
-	//setLighting(node_min, node_max, 0xFF);
+
+	if (flags & MG_LIGHT)
+		calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
+			full_node_min, full_node_max);
+
+	//setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
+	//			node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 
 	this->generating = false;
 }
 
 
-void MapgenV7::calculateNoise() {
+void MapgenV7::calculateNoise()
+{
 	//TimeTaker t("calculateNoise", NULL, PRECISION_MICRO);
-	int x = node_min.X;
-	int y = node_min.Y;
-	int z = node_min.Z;
-	
-	noise_terrain_mod->perlinMap2D(x, z);
-	
-	noise_height_select->perlinMap2D(x, z);
-	noise_height_select->transformNoiseMap();
-	
+	s16 x = node_min.X;
+	s16 y = node_min.Y - 1;
+	s16 z = node_min.Z;
+
 	noise_terrain_persist->perlinMap2D(x, z);
 	float *persistmap = noise_terrain_persist->result;
-	for (int i = 0; i != csize.X * csize.Z; i++)
-		persistmap[i] = abs(persistmap[i]);
-	
-	noise_terrain_base->perlinMap2DModulated(x, z, persistmap);
-	noise_terrain_base->transformNoiseMap();
-	
-	noise_terrain_alt->perlinMap2DModulated(x, z, persistmap);
-	noise_terrain_alt->transformNoiseMap();
-	
-	noise_ridge->perlinMap3D(x, y, z);
-	
-	noise_heat->perlinMap2D(x, z);
-	
-	noise_humidity->perlinMap2D(x, z);
-	
+
+	noise_terrain_base->perlinMap2D(x, z, persistmap);
+	noise_terrain_alt->perlinMap2D(x, z, persistmap);
+	noise_height_select->perlinMap2D(x, z);
+
+	if (spflags & MGV7_MOUNTAINS) {
+		noise_mountain->perlinMap3D(x, y, z);
+		noise_mount_height->perlinMap2D(x, z);
+	}
+
+	if ((spflags & MGV7_RIDGES) && node_max.Y >= water_level) {
+		noise_ridge->perlinMap3D(x, y, z);
+		noise_ridge_uwater->perlinMap2D(x, z);
+	}
+
+	// Cave noises are calculated in generateCaves()
+	// only if solid terrain is present in mapchunk
+
 	//printf("calculateNoise: %dus\n", t.stop());
 }
 
 
-Biome *MapgenV7::getBiomeAtPoint(v3s16 p) {
-	float heat      = NoisePerlin2D(bmgr->np_heat, p.X, p.Z, seed);
-	float humidity  = NoisePerlin2D(bmgr->np_humidity, p.X, p.Z, seed);
-	s16 groundlevel = baseTerrainLevelAtPoint(p.X, p.Z);
-	
-	return bmgr->getBiome(heat, humidity, groundlevel);
-}
+float MapgenV7::baseTerrainLevelAtPoint(s16 x, s16 z)
+{
+	float hselect = NoisePerlin2D(&noise_height_select->np, x, z, seed);
+	hselect = rangelim(hselect, 0.0, 1.0);
 
+	float persist = NoisePerlin2D(&noise_terrain_persist->np, x, z, seed);
 
-float MapgenV7::baseTerrainLevelAtPoint(int x, int z) {
-	float terrain_mod = NoisePerlin2DNoTxfm(noise_terrain_mod->np, x, z, seed);
-	float hselect     = NoisePerlin2D(noise_height_select->np, x, z, seed);
-	float persist     = abs(NoisePerlin2DNoTxfm(noise_terrain_persist->np, x, z, seed));
+	noise_terrain_base->np.persist = persist;
+	float height_base = NoisePerlin2D(&noise_terrain_base->np, x, z, seed);
 
-	noise_terrain_base->np->persist = persist;
-	float terrain_base = NoisePerlin2D(noise_terrain_base->np, x, z, seed);
-	float height_base  = terrain_base * terrain_mod;
+	noise_terrain_alt->np.persist = persist;
+	float height_alt = NoisePerlin2D(&noise_terrain_alt->np, x, z, seed);
 
-	noise_terrain_alt->np->persist = persist;
-	float height_alt = NoisePerlin2D(noise_terrain_alt->np, x, z, seed);
+	if (height_alt > height_base)
+		return height_alt;
 
 	return (height_base * hselect) + (height_alt * (1.0 - hselect));
 }
 
 
-float MapgenV7::baseTerrainLevelFromMap(int index) {	
-	float terrain_mod  = noise_terrain_mod->result[index];
-	float hselect      = noise_height_select->result[index];
-	float terrain_base = noise_terrain_base->result[index];
-	float height_base  = terrain_base * terrain_mod;
-	float height_alt   = noise_terrain_alt->result[index];
+float MapgenV7::baseTerrainLevelFromMap(int index)
+{
+	float hselect     = rangelim(noise_height_select->result[index], 0.0, 1.0);
+	float height_base = noise_terrain_base->result[index];
+	float height_alt  = noise_terrain_alt->result[index];
+
+	if (height_alt > height_base)
+		return height_alt;
 
 	return (height_base * hselect) + (height_alt * (1.0 - hselect));
 }
 
 
-#if 0
-// Crap code to test log rivers as a proof-of-concept.  Didn't work out too well.
-void MapgenV7::carveRivers() {
-	MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
-	MapNode n_stone(c_stone);
-	u32 index = 0;
-	
-	int river_depth = 4;
+bool MapgenV7::getMountainTerrainAtPoint(s16 x, s16 y, s16 z)
+{
+	float mnt_h_n = NoisePerlin2D(&noise_mount_height->np, x, z, seed);
+	float density_gradient = -((float)y / mnt_h_n);
+	float mnt_n = NoisePerlin3D(&noise_mountain->np, x, y, z, seed);
 
-	for (s16 z = node_min.Z; z <= node_max.Z; z++)
-	for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
-		float terrain_mod  = noise_terrain_mod->result[index];
-		NoiseParams *np = noise_terrain_river->np;
-		np->persist = noise_terrain_persist->result[index];
-		float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
-		float height = terrain_river * (1 - abs(terrain_mod)) *
-						noise_terrain_river->np->scale;
-		height = log(height * height); //log(h^3) is pretty interesting for terrain
-		
-		s16 y = heightmap[index];
-		if (height < 1.0 && y > river_depth &&
-			y - river_depth >= node_min.Y && y <= node_max.Y) {
-			
-			for (s16 ry = y; ry != y - river_depth; ry--) {
-				u32 vi = vm->m_area.index(x, ry, z);
-				vm->m_data[vi] = n_air;
-			}
-			
-			u32 vi = vm->m_area.index(x, y - river_depth, z);
-			vm->m_data[vi] = n_water_source;
-		}
-	}
+	return mnt_n + density_gradient >= 0.0;
 }
-#endif
 
 
-int MapgenV7::calcHeightMap() {
-	int stone_surface_max_y = -MAP_GENERATION_LIMIT;
-	u32 index = 0;
-	
-	for (s16 z = node_min.Z; z <= node_max.Z; z++)
-	for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
-		float surface_height = baseTerrainLevelFromMap(index);
-		s16 surface_y = (s16)surface_height;
-		
-		heightmap[index]       = surface_y; 
-		ridge_heightmap[index] = surface_y;
-		
-		if (surface_y > stone_surface_max_y)
-			stone_surface_max_y = surface_y;
-	}
-		
-	return stone_surface_max_y;
+bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
+{
+	float mounthn = noise_mount_height->result[idx_xz];
+	float density_gradient = -((float)y / mounthn);
+	float mountn = noise_mountain->result[idx_xyz];
+
+	return mountn + density_gradient >= 0.0;
 }
 
 
-void MapgenV7::generateTerrain() {
-	MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
+int MapgenV7::generateTerrain()
+{
+	MapNode n_air(CONTENT_AIR);
 	MapNode n_stone(c_stone);
+	MapNode n_water(c_water_source);
 
 	v3s16 em = vm->m_area.getExtent();
-	u32 index = 0;
-	
+	s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
+	u32 index2d = 0;
+	bool mountain_flag = spflags & MGV7_MOUNTAINS;
+
 	for (s16 z = node_min.Z; z <= node_max.Z; z++)
-	for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
-		s16 surface_y = heightmap[index];
-		Biome *biome = bmgr->biomes[biomemap[index]];
-		
-		u32 i = vm->m_area.index(x, node_min.Y, z);
-		for (s16 y = node_min.Y; y <= node_max.Y; y++) {
-			if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
+	for (s16 x = node_min.X; x <= node_max.X; x++, index2d++) {
+		s16 surface_y = baseTerrainLevelFromMap(index2d);
+		heightmap[index2d]       = surface_y;  // Create base terrain heightmap
+		ridge_heightmap[index2d] = surface_y;
+
+		if (surface_y > stone_surface_max_y)
+			stone_surface_max_y = surface_y;
+
+		u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
+		u32 index3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
+
+		for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
+			if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
 				if (y <= surface_y) {
-					vm->m_data[i] = (y > water_level + biome->filler_height) ?
-						MapNode(biome->c_filler) : n_stone;
+					vm->m_data[vi] = n_stone;  // Base terrain
+				} else if (mountain_flag &&
+						getMountainTerrainFromMap(index3d, index2d, y)) {
+					vm->m_data[vi] = n_stone;  // Mountain terrain
+					if (y > stone_surface_max_y)
+						stone_surface_max_y = y;
 				} else if (y <= water_level) {
-					vm->m_data[i] = n_water_source;
+					vm->m_data[vi] = n_water;
 				} else {
-					vm->m_data[i] = n_air;
+					vm->m_data[vi] = n_air;
 				}
 			}
-			vm->m_area.add_y(em, i, 1);
+			vm->m_area.add_y(em, vi, 1);
+			index3d += ystride;
 		}
 	}
+
+	return stone_surface_max_y;
 }
 
 
-void MapgenV7::carveRidges() {
-	if (node_max.Y <= water_level)
+void MapgenV7::generateRidgeTerrain()
+{
+	if (node_max.Y < water_level - 16)
 		return;
-		
+
+	MapNode n_water(c_water_source);
 	MapNode n_air(CONTENT_AIR);
 	u32 index = 0;
-	
+	float width = 0.2;
+
 	for (s16 z = node_min.Z; z <= node_max.Z; z++)
-	for (s16 y = node_min.Y; y <= node_max.Y; y++) {
+	for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
 		u32 vi = vm->m_area.index(node_min.X, y, z);
 		for (s16 x = node_min.X; x <= node_max.X; x++, index++, vi++) {
-			// Removing this check will create huge underwater caverns,
-			// which are interesting but not desirable for gameplay
-			if (y <= water_level)
+			int j = (z - node_min.Z) * csize.X + (x - node_min.X);
+
+			if (heightmap[j] < water_level - 16)  // Use base terrain heightmap
 				continue;
-				
-			if (noise_ridge->result[index] * (float)(y * y) < 15.0)
+
+			float uwatern = noise_ridge_uwater->result[j] * 2;
+			if (fabs(uwatern) > width)
+				continue;
+
+			float altitude = y - water_level;
+			float height_mod = (altitude + 17) / 2.5;
+			float width_mod  = width - fabs(uwatern);
+			float nridge = noise_ridge->result[index] * MYMAX(altitude, 0) / 7.0;
+
+			if (nridge + width_mod * height_mod < 0.6)
 				continue;
 
-			int j = (z - node_min.Z) * csize.Z + (x - node_min.X); //////obviously just temporary
 			if (y < ridge_heightmap[j])
-				ridge_heightmap[j] = y - 1; 
+				ridge_heightmap[j] = y - 1;
 
-			vm->m_data[vi] = n_air;
+			vm->m_data[vi] = (y > water_level) ? n_air : n_water;
 		}
 	}
 }
 
-/*
-void MapgenV7::testBiomes() {
+
+////////////////////////////////////////////////////////////////////////////////
+//// Code Boneyard
+////
+//// Much of the stuff here has potential to become useful again at some point
+//// in the future, but we don't want it to get lost or forgotten in version
+//// control.
+////
+
+#if 0
+int MapgenV7::generateMountainTerrain(s16 ymax)
+{
+	MapNode n_stone(c_stone);
+	u32 j = 0;
+
+	for (s16 z = node_min.Z; z <= node_max.Z; z++)
+	for (s16 y = node_min.Y - 1; y <= node_max.Y + 1; y++) {
+		u32 vi = vm->m_area.index(node_min.X, y, z);
+		for (s16 x = node_min.X; x <= node_max.X; x++) {
+			int index = (z - node_min.Z) * csize.X + (x - node_min.X);
+			content_t c = vm->m_data[vi].getContent();
+
+			if (getMountainTerrainFromMap(j, index, y)
+					&& (c == CONTENT_AIR || c == c_water_source)) {
+				vm->m_data[vi] = n_stone;
+				if (y > ymax)
+					ymax = y;
+			}
+
+			vi++;
+			j++;
+		}
+	}
+
+	return ymax;
+}
+#endif
+
+
+#if 0
+void MapgenV7::carveRivers() {
+	MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
+	MapNode n_stone(c_stone);
 	u32 index = 0;
-	
-	for (s16 z = node_min.Z; z <= node_min.Z; z++)
-	for (s16 x = node_min.X; x <= node_min.X; x++) {;
-		Biome *b = bmgr->getBiome(heat, humidity, 0);
+
+	int river_depth = 4;
+
+	for (s16 z = node_min.Z; z <= node_max.Z; z++)
+	for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
+		float terrain_mod  = noise_terrain_mod->result[index];
+		NoiseParams *np = noise_terrain_river->np;
+		np.persist = noise_terrain_persist->result[index];
+		float terrain_river = NoisePerlin2DNoTxfm(np, x, z, seed);
+		float height = terrain_river * (1 - abs(terrain_mod)) *
+						noise_terrain_river->np.scale;
+		height = log(height * height); //log(h^3) is pretty interesting for terrain
+
+		s16 y = heightmap[index];
+		if (height < 1.0 && y > river_depth &&
+			y - river_depth >= node_min.Y && y <= node_max.Y) {
+
+			for (s16 ry = y; ry != y - river_depth; ry--) {
+				u32 vi = vm->m_area.index(x, ry, z);
+				vm->m_data[vi] = n_air;
+			}
+
+			u32 vi = vm->m_area.index(x, y - river_depth, z);
+			vm->m_data[vi] = n_water_source;
+		}
 	}
-	// make an 80x80 grid with axes heat/humidity as a voroni diagram for biomes
-	// clear out y space for it first with air
-	// use absolute positioning, each chunk will be a +1 height
-}*/
+}
+#endif
 
 
-void MapgenV7::addTopNodes() {
+#if 0
+void MapgenV7::addTopNodes()
+{
 	v3s16 em = vm->m_area.getExtent();
 	s16 ntopnodes;
 	u32 index = 0;
-	
+
 	for (s16 z = node_min.Z; z <= node_max.Z; z++)
 	for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
-		// First, add top nodes below the ridge
+		Biome *biome = bmgr->biomes[biomemap[index]];
+
+		//////////////////// First, add top nodes below the ridge
 		s16 y = ridge_heightmap[index];
-		
+
 		// This cutoff is good enough, but not perfect.
 		// It will cut off potentially placed top nodes at chunk boundaries
 		if (y < node_min.Y)
@@ -406,23 +611,23 @@ void MapgenV7::addTopNodes() {
 		if (y > node_max.Y) {
 			y = node_max.Y; // Let's see if we can still go downward anyway
 			u32 vi = vm->m_area.index(x, y, z);
-			if (vm->m_data[vi].getContent() != CONTENT_AIR)
+			content_t c = vm->m_data[vi].getContent();
+			if (ndef->get(c).walkable)
 				continue;
 		}
-		
-		// N.B.  It is necessary to search downward since range_heightmap[i]
+
+		// N.B.  It is necessary to search downward since ridge_heightmap[i]
 		// might not be the actual height, just the lowest part in the chunk
 		// where a ridge had been carved
 		u32 i = vm->m_area.index(x, y, z);
 		for (; y >= node_min.Y; y--) {
-			if (vm->m_data[i].getContent() != CONTENT_AIR)
+			content_t c = vm->m_data[i].getContent();
+			if (ndef->get(c).walkable)
 				break;
 			vm->m_area.add_y(em, i, -1);
 		}
 
-		Biome *biome = bmgr->biomes[biomemap[index]];
-
-		if (y != node_min.Y - 1) {
+		if (y != node_min.Y - 1 && y >= water_level) {
 			ridge_heightmap[index] = y; //update ridgeheight
 			ntopnodes = biome->top_depth;
 			for (; y <= node_max.Y && ntopnodes; y++) {
@@ -430,15 +635,29 @@ void MapgenV7::addTopNodes() {
 				vm->m_data[i] = MapNode(biome->c_top);
 				vm->m_area.add_y(em, i, 1);
 			}
-			//heightmap[index] = y;
+			// If dirt, grow grass on it.
+			if (y > water_level - 10 &&
+				vm->m_data[i].getContent() == CONTENT_AIR) {
+				vm->m_area.add_y(em, i, -1);
+				if (vm->m_data[i].getContent() == c_dirt)
+					vm->m_data[i] = MapNode(c_dirt_with_grass);
+			}
 		}
-		
-		// Now, add top nodes on top of the ridge
+
+		//////////////////// Now, add top nodes on top of the ridge
 		y = heightmap[index];
+		if (y > node_max.Y) {
+			y = node_max.Y; // Let's see if we can still go downward anyway
+			u32 vi = vm->m_area.index(x, y, z);
+			content_t c = vm->m_data[vi].getContent();
+			if (ndef->get(c).walkable)
+				continue;
+		}
 
 		i = vm->m_area.index(x, y, z);
 		for (; y >= node_min.Y; y--) {
-			if (vm->m_data[i].getContent() != CONTENT_AIR)
+			content_t c = vm->m_data[i].getContent();
+			if (ndef->get(c).walkable)
 				break;
 			vm->m_area.add_y(em, i, -1);
 		}
@@ -454,35 +673,14 @@ void MapgenV7::addTopNodes() {
 				vm->m_data[i] = MapNode(biome->c_top);
 				vm->m_area.add_y(em, i, 1);
 			}
-		}
-	}
-}
-
-
-void MapgenV7::growGrass() {
-	for (s16 z = node_min.Z; z <= node_max.Z; z++)
-	for (s16 x = node_min.X; x <= node_max.X; x++) {
-		// Find the lowest surface to which enough light ends up to make
-		// grass grow.  Basically just wait until not air and not leaves.
-		s16 surface_y = 0;
-		{
-			v3s16 em = vm->m_area.getExtent();
-			u32 i = vm->m_area.index(x, node_max.Y, z);
-			s16 y;
-			// Go to ground level
-			for (y = node_max.Y; y >= node_min.Y; y--) {
-				MapNode &n = vm->m_data[i];
-				if (ndef->get(n).param_type != CPT_LIGHT ||
-					ndef->get(n).liquid_type != LIQUID_NONE)
-					break;
+			// If dirt, grow grass on it.
+			if (y > water_level - 10 &&
+				vm->m_data[i].getContent() == CONTENT_AIR) {
 				vm->m_area.add_y(em, i, -1);
+				if (vm->m_data[i].getContent() == c_dirt)
+					vm->m_data[i] = MapNode(c_dirt_with_grass);
 			}
-			surface_y = (y >= node_min.Y) ? y : node_min.Y;
 		}
-
-		u32 i = vm->m_area.index(x, surface_y, z);
-		MapNode *n = &vm->m_data[i];
-		if (n->getContent() == c_dirt && surface_y >= water_level - 20)
-			n->setContent(c_dirt_with_grass);
 	}
 }
+#endif