mirror of https://github.com/minetest/minetest.git
New math mapgen with fractal based worlds
This commit is contained in:
proller
parent
f960c3be31
commit
75b8c13b00
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@ -325,7 +325,7 @@
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# Mapgen stuff
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#
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# Name of map generator to be used. Currently v6, indev and singlenode are supported.
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# Name of map generator to be used. Currently supported: v6, indev, singlenode, math
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#mg_name = v6
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# Water level of map.
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#water_level = 1
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@ -368,6 +368,9 @@
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# Float islands starts from height, 0 to disable
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#mgindev_float_islands = 500
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# Math mapgen generator: sphere, mandelbox, mengersponge dont forget to lower water_level = -30000
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#mgmath_generator = mandelbox
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# Enable/disable IPv6
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#enable_ipv6 = true
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# Enable/disable running an IPv6 server. An IPv6 server may be restricted
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@ -233,6 +233,7 @@ set(common_SRCS
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mapgen_v7.cpp
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mapgen_indev.cpp
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mapgen_singlenode.cpp
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mapgen_math.cpp
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treegen.cpp
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dungeongen.cpp
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cavegen.cpp
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@ -251,7 +251,9 @@ void set_default_settings(Settings *settings)
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settings->setDefault("mgindev_np_float_islands3", "0, 1, (256, 256, 256), 6412, 2, 0.5, 1, 0.5");
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settings->setDefault("mgindev_np_biome", "0, 1, (250, 250, 250), 9130, 3, 0.50, 1, 10");
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settings->setDefault("mgindev_float_islands", "500");
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settings->setDefault("mgmath_generator", "mandelbox");
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// IPv6
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settings->setDefault("enable_ipv6", "true");
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settings->setDefault("ipv6_server", "false");
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@ -42,6 +42,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include "mapgen_v7.h"
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#include "mapgen_indev.h"
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#include "mapgen_singlenode.h"
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#include "mapgen_math.h"
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/////////////////////////////// Emerge Manager ////////////////////////////////
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@ -52,6 +53,7 @@ EmergeManager::EmergeManager(IGameDef *gamedef) {
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registerMapgen("v7", new MapgenFactoryV7());
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registerMapgen("indev", new MapgenFactoryIndev());
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registerMapgen("singlenode", new MapgenFactorySinglenode());
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registerMapgen("math", new MapgenFactoryMath());
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this->ndef = gamedef->getNodeDefManager();
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this->biomedef = new BiomeDefManager();
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@ -0,0 +1,366 @@
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/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <cmath>
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#include "mapgen_math.h"
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#include "voxel.h"
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#include "mapblock.h"
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#include "mapnode.h"
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#include "map.h"
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#include "nodedef.h"
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#include "voxelalgorithms.h"
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#include "profiler.h"
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#include "settings.h" // For g_settings
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#include "main.h" // For g_profiler
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#include "emerge.h"
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#include "biome.h"
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// can use ported lib from http://mandelbulber.googlecode.com/svn/trunk/src
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//#include "mandelbulber/fractal.h"
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//#include "mandelbulber/fractal.cpp"
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double mandelbox(double x, double y, double z, double d, int nn = 10) {
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int s = 7;
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x *= s;
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y *= s;
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z *= s;
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d *= s;
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double posX = x;
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double posY = y;
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double posZ = z;
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double dr = 1.0;
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double r = 0.0;
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double scale = 2;
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double minRadius2 = 0.25;
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double fixedRadius2 = 1;
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for (int n = 0; n < nn; n++) {
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// Reflect
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if (x > 1.0)
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x = 2.0 - x;
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else if (x < -1.0)
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x = -2.0 - x;
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if (y > 1.0)
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y = 2.0 - y;
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else if (y < -1.0)
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y = -2.0 - y;
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if (z > 1.0)
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z = 2.0 - z;
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else if (z < -1.0)
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z = -2.0 - z;
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// Sphere Inversion
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double r2 = x * x + y * y + z * z;
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if (r2 < minRadius2) {
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x = x * fixedRadius2 / minRadius2;
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y = y * fixedRadius2 / minRadius2;
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z = z * fixedRadius2 / minRadius2;
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dr = dr * fixedRadius2 / minRadius2;
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} else if (r2 < fixedRadius2) {
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x = x * fixedRadius2 / r2;
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y = y * fixedRadius2 / r2;
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z = z * fixedRadius2 / r2;
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fixedRadius2 *= fixedRadius2 / r2;
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}
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x = x * scale + posX;
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y = y * scale + posY;
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z = z * scale + posZ;
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dr *= scale;
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}
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r = sqrt(x * x + y * y + z * z);
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return ((r / fabs(dr)) < d);
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}
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double mengersponge(double x, double y, double z, double d, int MI = 10) {
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double r = x * x + y * y + z * z;
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double scale = 3;
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int i = 0;
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for (i = 0; i < MI && r < 9; i++) {
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x = fabs(x);
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y = fabs(y);
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z = fabs(z);
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if (x - y < 0) {
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double x1 = y;
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y = x;
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x = x1;
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}
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if (x - z < 0) {
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double x1 = z;
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z = x;
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x = x1;
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}
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if (y - z < 0) {
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double y1 = z;
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z = y;
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y = y1;
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}
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x = scale * x - 1 * (scale - 1);
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y = scale * y - 1 * (scale - 1);
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z = scale * z;
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if (z > 0.5 * 1 * (scale - 1))
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z -= 1 * (scale - 1);
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r = x * x + y * y + z * z;
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}
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return ((sqrt(r)) * pow(scale, (-i)) < d);
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}
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double sphere(double x, double y, double z, double d, int ITR = 1) {
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return v3f(x, y, z).getLength() < d;
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}
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//////////////////////// Mapgen Singlenode parameter read/write
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bool MapgenMathParams::readParams(Settings *settings) {
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//params = settings->getJson("mg_math");
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// can be counfigured from here.
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std::string value = "{}";
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Json::Reader reader;
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if (!reader.parse( value, params ) ) {
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errorstream << "Failed to parse json conf var ='" << value << "' : " << reader.getFormattedErrorMessages();
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}
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if (params["generator"].empty()) params["generator"] = settings->get("mgmath_generator");
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return true;
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}
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void MapgenMathParams::writeParams(Settings *settings) {
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//settings->setJson("mg_math", params);
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settings->set("mgmath_generator", params["generator"].asString());
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}
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///////////////////////////////////////////////////////////////////////////////
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MapgenMath::MapgenMath(int mapgenid, MapgenMathParams *params_, EmergeManager *emerge) : MapgenV7(mapgenid, params_, emerge) {
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mg_params = params_;
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Json::Value & params = mg_params->params;
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invert = params["invert"].empty() ? 1 : params["invert"].asBool(); //params["invert"].empty()?1:params["invert"].asBool();
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size = params["size"].empty() ? 0 : params["size"].asDouble(); // = max_r
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scale = params["scale"].empty() ? 0 : params["scale"].asDouble(); //(double)1 / size;
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if(!params["center"].empty()) center = v3f(params["center"]["x"].asFloat(), params["center"]["y"].asFloat(), params["center"]["z"].asFloat()); //v3f(5, -size - 5, 5);
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iterations = params["iterations"].empty() ? 0 : params["iterations"].asInt(); //10;
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distance = params["distance"].empty() ? 0 : params["distance"].asDouble(); // = 1/size;
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func = &sphere;
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if (params["generator"].empty()) params["generator"] = "mandelbox";
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if (params["generator"].asString() == "mengersponge") {
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if (!size) size = (MAP_GENERATION_LIMIT - 1000) / 2;
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if (!iterations) iterations = 10;
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if (!distance) distance = 0.0003;
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//if (!scale) scale = (double)0.1 / size;
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//if (!distance) distance = 0.01; //10/size;//sqrt3 * bd4;
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//if (!scale) scale = 0.01; //10/size;//sqrt3 * bd4;
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//center=v3f(-size/3,-size/3+(-2*-invert),2);
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center = v3f(-size, -size, -size);
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func = &mengersponge;
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} else if (params["generator"].asString() == "mandelbox") {
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/*
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size = MAP_GENERATION_LIMIT - 1000;
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//size = 1000;
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distance = 0.01; //100/size; //0.01;
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iterations = 10;
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center = v3f(1, 1, 1); // *size/6;
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*/
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//mandelbox
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if (!size) size = 1000;
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if (!distance) distance = 0.01;
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if(params["invert"].empty()) invert = 0;
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//center=v3f(2,-size/4,2);
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//size = 10000;
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//center=v3f(size/2,-size*0.9,size/2);
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if(params["center"].empty())center = v3f(size * 0.3, -size * 0.6, size * 0.5);
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func = &mandelbox;
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} else if (params["generator"].asString() == "sphere") {
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if(params["invert"].empty()) invert = 0;
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if (!size) size = 100;
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if (!distance) distance = size;
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func = &sphere;
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if (!scale) scale = 1;
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//sphere
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//size = 1000;scale = 1;center = v3f(2,-size-2,2);
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}
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if (!iterations) iterations = 10;
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if (!size) size = 1000;
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if (!scale) scale = (double)1 / size;
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if (!distance) distance = scale;
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if (params["center"].empty() && !center.getLength()) center = v3f(3, -size + (-5 - (-invert * 10)), 3);
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//size ||= params["size"].empty()?1000:params["size"].asDouble(); // = max_r
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}
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MapgenMath::~MapgenMath() {
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}
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//////////////////////// Map generator
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void MapgenMath::generateTerrain() {
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MapNode n_air(CONTENT_AIR), n_water_source(c_water_source, LIGHT_SUN);
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MapNode n_stone(c_stone, LIGHT_SUN);
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u32 index = 0;
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v3s16 em = vm->m_area.getExtent();
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#if 1
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/* debug
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v3f vec0 = (v3f(node_min.X, node_min.Y, node_min.Z) - center) * scale ;
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errorstream << " X=" << node_min.X << " Y=" << node_min.Y << " Z=" << node_min.Z
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//<< " N="<< mengersponge(vec0.X, vec0.Y, vec0.Z, distance, iterations)
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<< " N=" << (*func)(vec0.X, vec0.Y, vec0.Z, distance, iterations)
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<< " Sc=" << scale << " gen=" << params["generator"].asString() << " J=" << Json::FastWriter().write(params) << std::endl;
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*/
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for (s16 z = node_min.Z; z <= node_max.Z; z++) {
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for (s16 x = node_min.X; x <= node_max.X; x++, index++) {
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Biome *biome = bmgr->biomes[biomemap[index]];
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u32 i = vm->m_area.index(x, node_min.Y, z);
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for (s16 y = node_min.Y; y <= node_max.Y; y++) {
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v3f vec = (v3f(x, y, z) - center) * scale ;
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double d = (*func)(vec.X, vec.Y, vec.Z, distance, iterations);
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if ((!invert && d > 0) || (invert && d == 0) ) {
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if (vm->m_data[i].getContent() == CONTENT_IGNORE)
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vm->m_data[i] = (y > water_level + biome->filler_height) ?
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MapNode(biome->c_filler) : n_stone;
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} else if (y <= water_level) {
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vm->m_data[i] = n_water_source;
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} else {
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vm->m_data[i] = n_air;
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}
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vm->m_area.add_y(em, i, 1);
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}
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}
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}
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#endif
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#if 0
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// mandelbulber, unfinished but works
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sFractal par;
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par.doubles.N = 10;
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par.doubles.power = 9.0;
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par.doubles.foldingSphericalFixed = 1.0;
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par.doubles.foldingSphericalMin = 0.5;
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//no par.formula = smoothMandelbox; par.doubles.N = 40; invert = 0;//no
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par.mandelbox.doubles.sharpness = 3.0;
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par.mandelbox.doubles.scale = 1;
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par.mandelbox.doubles.sharpness = 2;
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par.mandelbox.doubles.foldingLimit = 1.0;
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par.mandelbox.doubles.foldingValue = 2;
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//ok par.formula = mandelboxVaryScale4D; par.doubles.N = 50; scale = 5; invert = 1; //ok
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par.mandelbox.doubles.vary4D.scaleVary = 0.1;
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par.mandelbox.doubles.vary4D.fold = 1;
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par.mandelbox.doubles.vary4D.rPower = 1;
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par.mandelbox.doubles.vary4D.minR = 0.5;
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par.mandelbox.doubles.vary4D.wadd = 0;
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par.doubles.constantFactor = 1.0;
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par.formula = menger_sponge; par.doubles.N = 15; invert = 0; size = 30000; center = v3f(-size / 2, -size + (-2 * -invert), 2); scale = (double)1 / size; //ok
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//double tresh = 1.5;
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//par.formula = mandelbulb2; par.doubles.N = 10; scale = (double)1/size; invert=1; center = v3f(5,-size-5,0); //ok
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//par.formula = hypercomplex; par.doubles.N = 20; scale = 0.0001; invert=1; center = v3f(0,-10001,0); //(double)50 / max_r;
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//no par.formula = trig_DE; par.doubles.N = 5; scale = (double)10; invert=1;
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//no par.formula = trig_optim; scale = (double)10; par.doubles.N = 4;
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//par.formula = mandelbulb2; scale = (double)1/10000; par.doubles.N = 10; invert = 1; center = v3f(1,-4201,1); //ok
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// no par.formula = tglad;
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//par.formula = xenodreambuie; par.juliaMode = 1; par.doubles.julia.x = -1; par.doubles.power = 2.0; center=v3f(-size/2,-size/2-5,5); //ok
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par.mandelbox.doubles.vary4D.scaleVary = 0.1;
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par.mandelbox.doubles.vary4D.fold = 1;
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par.mandelbox.doubles.vary4D.minR = 0.5;
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par.mandelbox.doubles.vary4D.rPower = 1;
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par.mandelbox.doubles.vary4D.wadd = 0;
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//no par.formula = mandelboxVaryScale4D;
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par.doubles.cadd = -1.3;
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//par.formula = aexion; // ok but center
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//par.formula = benesi; par.doubles.N = 10; center = v3f(0,0,0); invert = 0; //ok
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// par.formula = bristorbrot; //ok
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v3f vec0(node_min.X, node_min.Y, node_min.Z);
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vec0 = (vec0 - center) * scale ;
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errorstream << " X=" << node_min.X << " Y=" << node_min.Y << " Z=" << node_min.Z
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<< " N=" << Compute<normal>(CVector3(vec0.X, vec0.Y, vec0.Z), par)
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//<<" F="<< Compute<fake_AO>(CVector3(node_min.X,node_min.Y,node_min.Z), par)
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//<<" L="<<node_min.getLength()<< " -="<<node_min.getLength() - Compute<normal>(CVector3(node_min.X,node_min.Y,node_min.Z), par)
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<< " Sc=" << scale
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<< std::endl;
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for (s16 z = node_min.Z; z <= node_max.Z; z++)
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for (s16 y = node_min.Y; y <= node_max.Y; y++) {
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u32 i = vm->m_area.index(node_min.X, y, z);
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for (s16 x = node_min.X; x <= node_max.X; x++) {
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v3f vec(x, y, z);
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vec = (vec - center) * scale ;
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//double d = Compute<fake_AO>(CVector3(x,y,z), par);
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double d = Compute<normal>(CVector3(vec.X, vec.Y, vec.Z), par);
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//if (d>0)
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// errorstream << " d=" << d <<" v="<< vec.getLength()<< " -="<< vec.getLength() - d <<" yad="
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//<< Compute<normal>(CVector3(x,y,z), par)
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//<< std::endl;
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if ((!invert && d > 0) || (invert && d == 0)/*&& vec.getLength() - d > tresh*/ ) {
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if (vm->m_data[i].getContent() == CONTENT_IGNORE)
|
||||
vm->m_data[i] = n_stone;
|
||||
} else {
|
||||
vm->m_data[i] = n_air;
|
||||
}
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
int MapgenMath::getGroundLevelAtPoint(v2s16 p) {
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -0,0 +1,70 @@
|
|||
/*
|
||||
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_MATH_HEADER
|
||||
#define MAPGEN_MATH_HEADER
|
||||
|
||||
#include "mapgen.h"
|
||||
#include "mapgen_v7.h"
|
||||
#include "json/json.h"
|
||||
|
||||
struct MapgenMathParams : public MapgenV7Params {
|
||||
|
||||
MapgenMathParams() {
|
||||
}
|
||||
|
||||
Json::Value params;
|
||||
|
||||
bool readParams(Settings *settings);
|
||||
void writeParams(Settings *settings);
|
||||
};
|
||||
|
||||
class MapgenMath : public MapgenV7 {
|
||||
public:
|
||||
MapgenMathParams * mg_params;
|
||||
|
||||
MapgenMath(int mapgenid, MapgenMathParams *mg_params, EmergeManager *emerge);
|
||||
~MapgenMath();
|
||||
|
||||
|
||||
//void makeChunk(BlockMakeData *data);
|
||||
void generateTerrain();
|
||||
int getGroundLevelAtPoint(v2s16 p);
|
||||
|
||||
bool invert;
|
||||
double size;
|
||||
double scale;
|
||||
v3f center;
|
||||
int iterations;
|
||||
double distance;
|
||||
double (*func)(double, double, double, double, int);
|
||||
|
||||
};
|
||||
|
||||
struct MapgenFactoryMath : public MapgenFactory {
|
||||
Mapgen *createMapgen(int mgid, MapgenParams *params, EmergeManager *emerge) {
|
||||
return new MapgenMath(mgid, (MapgenMathParams *)params, emerge);
|
||||
};
|
||||
|
||||
MapgenParams *createMapgenParams() {
|
||||
return new MapgenMathParams();
|
||||
};
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
@ -94,7 +94,7 @@ public:
|
|||
MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge);
|
||||
~MapgenV7();
|
||||
|
||||
void makeChunk(BlockMakeData *data);
|
||||
virtual void makeChunk(BlockMakeData *data);
|
||||
int getGroundLevelAtPoint(v2s16 p);
|
||||
Biome *getBiomeAtPoint(v3s16 p);
|
||||
|
||||
|
|
@ -103,7 +103,7 @@ public:
|
|||
void calculateNoise();
|
||||
int calcHeightMap();
|
||||
|
||||
void generateTerrain();
|
||||
virtual void generateTerrain();
|
||||
void carveRidges();
|
||||
//void carveRivers(); //experimental
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue