Merge remote branch 'origin/master'

1 files changed, 490 insertions, 0 deletions

diff --git a/src/mapgen_v7.cpp b/src/mapgen_v7.cpp
new file mode 100644
index 000000000..6aecfe310
--- /dev/null
+++ b/src/mapgen_v7.cpp
@@ -0,0 +1,490 @@
+/*
+Minetest
+Copyright (C) 2010-2013 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+
+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.
+*/
+
+
+#include "mapgen.h"
+#include "voxel.h"
+#include "noise.h"
+#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 "settings.h" // For g_settings
+#include "main.h" // For g_profiler
+#include "emerge.h"
+#include "dungeongen.h"
+#include "treegen.h"
+#include "biome.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};
+*/
+///////////////////////////////////////////////////////////////////////////////
+
+
+MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge) {
+	this->generating  = false;
+	this->id     = mapgenid;
+	this->emerge = emerge;
+	this->bmgr   = emerge->biomedef;
+
+	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
+
+	this->biomemap  = new u8[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);	
+}
+
+
+MapgenV7::~MapgenV7() {
+	delete noise_terrain_base;
+	delete noise_terrain_mod;
+	delete noise_terrain_persist;
+	delete noise_height_select;
+	delete noise_terrain_alt;
+	delete noise_ridge;
+	delete noise_heat;
+	delete noise_humidity;
+	
+	delete[] ridge_heightmap;
+	delete[] heightmap;
+	delete[] biomemap;
+}
+
+
+int MapgenV7::getGroundLevelAtPoint(v2s16 p) {
+	return 20;
+}
+
+
+void MapgenV7::makeChunk(BlockMakeData *data) {
+	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);
+	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);
+			
+	this->generating = true;
+	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);
+
+	// 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);
+	}
+
+	for (size_t i = 0; i != emerge->ores.size(); i++) {
+		Ore *ore = emerge->ores[i];
+		ore->generate(this, blockseed + i, node_min, node_max);
+	}
+	
+	//printf("makeChunk: %dms\n", t.stop());
+	
+	updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
+	
+	calcLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
+				 node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE);
+	//setLighting(node_min, node_max, 0xFF);
+
+	this->generating = false;
+}
+
+
+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();
+	
+	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);
+	
+	//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(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 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);
+
+	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];
+
+	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;
+
+	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;
+		}
+	}
+}
+#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;
+}
+
+
+void MapgenV7::generateTerrain() {
+	MapNode n_air(CONTENT_AIR), n_water_source(c_water_source);
+	MapNode n_stone(c_stone);
+
+	v3s16 em = vm->m_area.getExtent();
+	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++) {
+		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) {
+				if (y <= surface_y) {
+					vm->m_data[i] = (y > water_level + biome->filler_height) ?
+						MapNode(biome->c_filler) : n_stone;
+				} else if (y <= water_level) {
+					vm->m_data[i] = n_water_source;
+				} else {
+					vm->m_data[i] = n_air;
+				}
+			}
+			vm->m_area.add_y(em, i, 1);
+		}
+	}
+}
+
+
+void MapgenV7::carveRidges() {
+	if (node_max.Y <= water_level)
+		return;
+		
+	MapNode n_air(CONTENT_AIR);
+	u32 index = 0;
+	
+	for (s16 z = node_min.Z; z <= node_max.Z; z++)
+	for (s16 y = node_min.Y; y <= node_max.Y; 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)
+				continue;
+				
+			if (noise_ridge->result[index] * (float)(y * y) < 15.0)
+				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; 
+
+			vm->m_data[vi] = n_air;
+		}
+	}
+}
+
+/*
+void MapgenV7::testBiomes() {
+	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);
+	}
+	// 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
+}*/
+
+
+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
+		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)
+			continue;
+		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)
+				continue;
+		}
+		
+		// N.B.  It is necessary to search downward since range_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)
+				break;
+			vm->m_area.add_y(em, i, -1);
+		}
+
+		Biome *biome = bmgr->biomes[biomemap[index]];
+
+		if (y != node_min.Y - 1) {
+			ridge_heightmap[index] = y; //update ridgeheight
+			ntopnodes = biome->top_depth;
+			for (; y <= node_max.Y && ntopnodes; y++) {
+				ntopnodes--;
+				vm->m_data[i] = MapNode(biome->c_top);
+				vm->m_area.add_y(em, i, 1);
+			}
+			//heightmap[index] = y;
+		}
+		
+		// Now, add top nodes on top of the ridge
+		y = heightmap[index];
+
+		i = vm->m_area.index(x, y, z);
+		for (; y >= node_min.Y; y--) {
+			if (vm->m_data[i].getContent() != CONTENT_AIR)
+				break;
+			vm->m_area.add_y(em, i, -1);
+		}
+
+		if (y != node_min.Y - 1) {
+			ntopnodes = biome->top_depth;
+			// Let's see if we've already added it...
+			if (y == ridge_heightmap[index] + ntopnodes - 1)
+				continue;
+
+			for (; y <= node_max.Y && ntopnodes; y++) {
+				ntopnodes--;
+				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;
+				vm->m_area.add_y(em, i, -1);
+			}
+			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);
+	}
+}