initial mapgen indev version with farscale feature and huge caves

1 files changed, 246 insertions, 0 deletions

diff --git a/src/mapgen_indev.cpp b/src/mapgen_indev.cpp
new file mode 100644
index 000000000..e9ab36ae9
--- /dev/null
+++ b/src/mapgen_indev.cpp
@@ -0,0 +1,246 @@
+/*
+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_indev.h"
+#include "constants.h"
+#include "log.h"
+
+/////////////////// Mapgen Indev perlin noise default values
+
+NoiseIndevParams nparams_indev_def_terrain_base
+	(-AVERAGE_MUD_AMOUNT, 20.0, v3f(250.0, 250.0, 250.0), 82341, 5, 0.6, 1);
+NoiseIndevParams nparams_indev_def_terrain_higher
+	(20.0, 16.0, v3f(500.0, 500.0, 500.0), 85039, 5, 0.6, 1);
+NoiseIndevParams nparams_indev_def_steepness
+	(0.85, 0.5, v3f(125.0, 125.0, 125.0), -932, 5, 0.7, 1);
+NoiseIndevParams nparams_indev_def_mud
+	(AVERAGE_MUD_AMOUNT, 2.0, v3f(200.0, 200.0, 200.0), 91013, 3, 0.55, 1);
+
+///////////////////////////////////////////////////////////////////////////////
+
+void NoiseIndev::init(NoiseIndevParams *np, int seed, int sx, int sy, int sz) {
+	Noise::init((NoiseParams*)np, seed, sx, sy, sz);
+	this->npindev   = np;
+}
+
+
+NoiseIndev::NoiseIndev(NoiseIndevParams *np, int seed, int sx, int sy) : Noise(np, seed, sx, sy) {
+        init(np, seed, sx, sy, 1);
+}
+
+
+NoiseIndev::NoiseIndev(NoiseIndevParams *np, int seed, int sx, int sy, int sz) : Noise(np, seed, sx, sy, sz) {
+        init(np, seed, sx, sy, sz);
+}
+
+
+float farscale(float scale, float x, float y, float z) {
+	return ( 1 + ( 1 - (MAP_GENERATION_LIMIT * 3 - (fabs(x) + fabs(y) + fabs(z)) ) / (MAP_GENERATION_LIMIT * 3) ) * (scale - 1) );
+}
+
+void NoiseIndev::transformNoiseMapFarScale(float xx, float yy, float zz) {
+        // more correct use distantion from 0,0,0 via pow, but + is faster
+        //float farscale = ( 1 + ( 1 - (MAP_GENERATION_LIMIT * 3 - (fabs(xx) + fabs(yy) + fabs(zz)) ) / (MAP_GENERATION_LIMIT * 3) ) * ((npindev)->farscale - 1) );
+        // dstream << "TNM rs="  << farscale << " from=" << (npindev)->farscale << " x=" << xx << " y=" << yy <<" z=" << zz << std::endl;
+        int i = 0;
+        for (int z = 0; z != sz; z++) {
+                for (int y = 0; y != sy; y++) {
+                        for (int x = 0; x != sx; x++) {
+                                //result[i] = result[i] * npindev->scale * farscale + npindev->offset;
+                                result[i] = result[i] * npindev->scale * farscale(npindev->farscale,xx,yy,zz) + npindev->offset;
+                                i++;
+                        }
+                }
+        }
+}
+
+MapgenIndev::MapgenIndev(int mapgenid, MapgenIndevParams *params) : MapgenV6(mapgenid, params) {
+        noiseindev_terrain_base   = new NoiseIndev(params->npindev_terrain_base,   seed, csize.X, csize.Y);
+        noiseindev_terrain_higher = new NoiseIndev(params->npindev_terrain_higher, seed, csize.X, csize.Y);
+        noiseindev_steepness      = new NoiseIndev(params->npindev_steepness,      seed, csize.X, csize.Y);
+//        noise_height_select  = new Noise(params->np_height_select,  seed, csize.X, csize.Y);
+//        noise_trees          = new Noise(params->np_trees,          seed, csize.X, csize.Y);
+        noiseindev_mud            = new NoiseIndev(params->npindev_mud,            seed, csize.X, csize.Y);
+//        noise_beach          = new Noise(params->np_beach,          seed, csize.X, csize.Y);
+//        noise_biome          = new Noise(params->np_biome,          seed, csize.X, csize.Y);
+}
+
+MapgenIndev::~MapgenIndev() {
+	delete noiseindev_terrain_base;
+	delete noiseindev_terrain_higher;
+	delete noiseindev_steepness;
+	//delete noise_height_select;
+	//delete noise_trees;
+	delete noiseindev_mud;
+	//delete noise_beach;
+	//delete noise_biome;
+}
+
+
+void MapgenIndev::calculateNoise() {
+	int x = node_min.X;
+	int y = node_min.Y;
+	int z = node_min.Z;
+	// Need to adjust for the original implementation's +.5 offset...
+	if (!(flags & MG_FLAT)) {
+		noiseindev_terrain_base->perlinMap2D(
+			x + 0.5 * noiseindev_terrain_base->npindev->spread.X,
+			z + 0.5 * noiseindev_terrain_base->npindev->spread.Z);
+		noiseindev_terrain_base->transformNoiseMapFarScale(x, y, z);
+		//noise_terrain_base->transformNoiseMap();
+
+		noiseindev_terrain_higher->perlinMap2D(
+			x + 0.5 * noiseindev_terrain_higher->npindev->spread.X,
+			z + 0.5 * noiseindev_terrain_higher->npindev->spread.Z);
+		noiseindev_terrain_higher->transformNoiseMapFarScale(x, y, z);
+		//noise_terrain_higher->transformNoiseMap();
+
+		noiseindev_steepness->perlinMap2D(
+			x + 0.5 * noiseindev_steepness->npindev->spread.X,
+			z + 0.5 * noiseindev_steepness->npindev->spread.Z);
+		noiseindev_steepness->transformNoiseMapFarScale(x, y, z);
+
+		noise_height_select->perlinMap2D(
+			x + 0.5 * noise_height_select->np->spread.X,
+			z + 0.5 * noise_height_select->np->spread.Z);
+	}
+	
+	if (!(flags & MG_FLAT)) {
+		noiseindev_mud->perlinMap2D(
+			x + 0.5 * noiseindev_mud->npindev->spread.X,
+			z + 0.5 * noiseindev_mud->npindev->spread.Z);
+		noiseindev_mud->transformNoiseMapFarScale(x, y, z);
+	}
+	noise_beach->perlinMap2D(
+		x + 0.2 * noise_beach->np->spread.X,
+		z + 0.7 * noise_beach->np->spread.Z);
+
+	noise_biome->perlinMap2D(
+		x + 0.6 * noise_biome->np->spread.X,
+		z + 0.2 * noise_biome->np->spread.Z);
+}
+
+bool MapgenIndevParams::readParams(Settings *settings) {
+        freq_desert = settings->getFloat("mgv6_freq_desert");
+        freq_beach  = settings->getFloat("mgv6_freq_beach");
+
+        npindev_terrain_base   = settings->getNoiseIndevParams("mgindev_np_terrain_base");
+        npindev_terrain_higher = settings->getNoiseIndevParams("mgindev_np_terrain_higher");
+        npindev_steepness      = settings->getNoiseIndevParams("mgindev_np_steepness");
+        np_height_select  = settings->getNoiseParams("mgv6_np_height_select");
+        np_trees          = settings->getNoiseParams("mgv6_np_trees");
+        npindev_mud            = settings->getNoiseIndevParams("mgindev_np_mud");
+        np_beach          = settings->getNoiseParams("mgv6_np_beach");
+        np_biome          = settings->getNoiseParams("mgv6_np_biome");
+        np_cave           = settings->getNoiseParams("mgv6_np_cave");
+
+        bool success =
+                npindev_terrain_base  && npindev_terrain_higher && npindev_steepness &&
+                np_height_select && np_trees          && npindev_mud       &&
+                np_beach         && np_biome          && np_cave;
+        return success;
+}
+
+
+void MapgenIndevParams::writeParams(Settings *settings) {
+        settings->setFloat("mgv6_freq_desert", freq_desert);
+        settings->setFloat("mgv6_freq_beach",  freq_beach);
+
+        settings->setNoiseIndevParams("mgindev_np_terrain_base",   npindev_terrain_base);
+        settings->setNoiseIndevParams("mgindev_np_terrain_higher", npindev_terrain_higher);
+        settings->setNoiseIndevParams("mgindev_np_steepness",      npindev_steepness);
+        settings->setNoiseParams("mgv6_np_height_select",  np_height_select);
+        settings->setNoiseParams("mgv6_np_trees",          np_trees);
+        settings->setNoiseIndevParams("mgindev_np_mud",            npindev_mud);
+        settings->setNoiseParams("mgv6_np_beach",          np_beach);
+        settings->setNoiseParams("mgv6_np_biome",          np_biome);
+        settings->setNoiseParams("mgv6_np_cave",           np_cave);
+}
+
+
+float MapgenIndev::baseTerrainLevelFromNoise(v2s16 p) {
+	if (flags & MG_FLAT)
+		return water_level;
+		
+	float terrain_base   = NoisePerlin2DPosOffset(noiseindev_terrain_base->npindev,
+							p.X, 0.5, p.Y, 0.5, seed);
+	float terrain_higher = NoisePerlin2DPosOffset(noiseindev_terrain_higher->npindev,
+							p.X, 0.5, p.Y, 0.5, seed);
+	float steepness      = NoisePerlin2DPosOffset(noiseindev_steepness->npindev,
+							p.X, 0.5, p.Y, 0.5, seed);
+	float height_select  = NoisePerlin2DNoTxfmPosOffset(noise_height_select->np,
+							p.X, 0.5, p.Y, 0.5, seed);
+
+	return baseTerrainLevel(terrain_base, terrain_higher,
+							steepness,    height_select);
+}
+
+float MapgenIndev::baseTerrainLevelFromMap(int index) {
+	if (flags & MG_FLAT)
+		return water_level;
+	
+	float terrain_base   = noiseindev_terrain_base->result[index];
+	float terrain_higher = noiseindev_terrain_higher->result[index];
+	float steepness      = noiseindev_steepness->result[index];
+	float height_select  = noise_height_select->result[index];
+	
+	return baseTerrainLevel(terrain_base, terrain_higher,
+							steepness,    height_select);
+}
+
+float MapgenIndev::getMudAmount(int index)
+{
+	if (flags & MG_FLAT)
+		return AVERAGE_MUD_AMOUNT;
+		
+	/*return ((float)AVERAGE_MUD_AMOUNT + 2.0 * noise2d_perlin(
+			0.5+(float)p.X/200, 0.5+(float)p.Y/200,
+			seed+91013, 3, 0.55));*/
+	
+	return noiseindev_mud->result[index];
+}
+
+void MapgenIndev::defineCave(Cave & cave, PseudoRandom ps, v3s16 node_min, bool large_cave) {
+	cave.min_tunnel_diameter = 2;
+	cave.max_tunnel_diameter = ps.range(2,6);
+	cave.dswitchint = ps.range(1,14);
+	//cave.tunnel_routepoints = 0;
+	//cave.part_max_length_rs = 0;
+	cave.flooded = large_cave && ps.range(0,4);
+	if(large_cave){
+		cave.part_max_length_rs = ps.range(2,4);
+//dstream<<"try:"<<farscale(0.2, node_min.X,node_min.Y,node_min.Z)*30<<std::endl;
+		if (node_min.Y < -500 && !ps.range(0, farscale(0.2, node_min.X,node_min.Y,node_min.Z)*30)) { //huge
+			cave.flooded = ps.range(0, 1);
+//dstream<<"HUGE:"<<cave.flooded<<std::endl;
+			cave.tunnel_routepoints = ps.range(5, 1522);
+			cave.min_tunnel_diameter = 30;
+			cave.max_tunnel_diameter = ps.range(30, ps.range(80,120));
+		} else {
+//dstream<<"large:"<<cave.flooded<<std::endl;
+			cave.tunnel_routepoints = ps.range(5, ps.range(15,30));
+			cave.min_tunnel_diameter = 5;
+			cave.max_tunnel_diameter = ps.range(7, ps.range(8,24));
+		}
+	} else {
+		cave.part_max_length_rs = ps.range(2,9);
+		cave.tunnel_routepoints = ps.range(10, ps.range(15,30));
+	}
+	cave.large_cave_is_flat = (ps.range(0,1) == 0);
+};