Add singlenode mapgen; generates solely the node 'mapgen_singlenode', defaults to air

minetest.conf.example

@@ -311,7 +311,7 @@
 # Mapgen stuff
 #
 
-# Name of map generator to be used.  Currently v6 and indev are supported.
+# Name of map generator to be used.  Currently v6, indev and singlenode are supported.
 #mg_name = v6
 # Water level of map.
 #water_level = 1

src/CMakeLists.txt

@@ -227,6 +227,7 @@ set(common_SRCS
 	mapgen.cpp
 	mapgen_v6.cpp
 	mapgen_indev.cpp
+	mapgen_singlenode.cpp
 	treegen.cpp
 	dungeongen.cpp
 	content_nodemeta.cpp

src/emerge.cpp

@@ -40,6 +40,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "emerge.h"
 #include "mapgen_v6.h"
 #include "mapgen_indev.h"
+#include "mapgen_singlenode.h"
 
 
 /////////////////////////////// Emerge Manager ////////////////////////////////
@@ -48,6 +49,7 @@ EmergeManager::EmergeManager(IGameDef *gamedef, BiomeDefManager *bdef) {
 	//register built-in mapgens
 	registerMapgen("v6", new MapgenFactoryV6());
 	registerMapgen("indev", new MapgenFactoryIndev());
+	registerMapgen("singlenode", new MapgenFactorySinglenode());
 
 	this->biomedef = bdef ? bdef : new BiomeDefManager(gamedef);
 	this->params   = NULL;

src/mapgen_singlenode.cpp

@@ -0,0 +1,96 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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_singlenode.h"
+#include "voxel.h"
+#include "mapblock.h"
+#include "mapnode.h"
+#include "map.h"
+#include "nodedef.h"
+#include "voxelalgorithms.h"
+#include "profiler.h"
+#include "settings.h" // For g_settings
+#include "main.h" // For g_profiler
+#include "emerge.h"
+
+//////////////////////// Mapgen Singlenode parameter read/write
+
+bool MapgenSinglenodeParams::readParams(Settings *settings) {
+	return true;
+}
+
+
+void MapgenSinglenodeParams::writeParams(Settings *settings) {
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+MapgenSinglenode::MapgenSinglenode(int mapgenid, MapgenSinglenodeParams *params) {
+}
+
+
+MapgenSinglenode::~MapgenSinglenode() {
+}
+
+//////////////////////// Map generator
+
+void MapgenSinglenode::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;
+			
+	v3s16 blockpos_min = data->blockpos_min;
+	v3s16 blockpos_max = data->blockpos_max;
+
+	// Area of central chunk
+	v3s16 node_min = blockpos_min*MAP_BLOCKSIZE;
+	v3s16 node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
+
+	content_t c_node = ndef->getId("mapgen_singlenode");
+	if(c_node == CONTENT_IGNORE)
+		c_node = CONTENT_AIR;
+	for(s16 z=node_min.Z; z<=node_max.Z; z++)
+	for(s16 y=node_min.Y; y<=node_max.Y; y++)
+	for(s16 x=node_min.X; x<=node_max.X; x++)
+	{
+		data->vmanip->setNode(v3s16(x,y,z), MapNode(c_node));
+	}
+
+	// Add top and bottom side of water to transforming_liquid queue
+	updateLiquid(&data->transforming_liquid, node_min, node_max);
+
+	// Calculate lighting
+	calcLighting(node_min, node_max);
+	
+	this->generating = false;
+}
+
+int MapgenSinglenode::getGroundLevelAtPoint(v2s16 p) {
+	return 0;
+}
+

src/mapgen_singlenode.h

@@ -0,0 +1,53 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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_SINGLENODE_HEADER
+#define MAPGEN_SINGLENODE_HEADER
+
+#include "mapgen.h"
+
+struct MapgenSinglenodeParams : public MapgenParams {
+	
+	MapgenSinglenodeParams() {
+	}
+	
+	bool readParams(Settings *settings);
+	void writeParams(Settings *settings);
+};
+
+class MapgenSinglenode : public Mapgen {
+public:
+	MapgenSinglenode(int mapgenid, MapgenSinglenodeParams *params);
+	~MapgenSinglenode();
+	
+	void makeChunk(BlockMakeData *data);
+	int getGroundLevelAtPoint(v2s16 p);
+};
+
+struct MapgenFactorySinglenode : public MapgenFactory {
+	Mapgen *createMapgen(int mgid, MapgenParams *params, EmergeManager *emerge) {
+		return new MapgenSinglenode(mgid, (MapgenSinglenodeParams *)params);
+	};
+	
+	MapgenParams *createMapgenParams() {
+		return new MapgenSinglenodeParams();
+	};
+};
+
+#endif