Move files to subdirectories (#6599)

* Move files around

1 files changed, 404 insertions, 0 deletions

diff --git a/src/mapgen/mapgen_fractal.cpp b/src/mapgen/mapgen_fractal.cpp
new file mode 100644
index 000000000..b06885826
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+++ b/src/mapgen/mapgen_fractal.cpp
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+/*
+Minetest
+Copyright (C) 2015-2017 paramat
+Copyright (C) 2015-2016 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 "content_sao.h"
+#include "nodedef.h"
+#include "voxelalgorithms.h"
+//#include "profiler.h" // For TimeTaker
+#include "settings.h" // For g_settings
+#include "emerge.h"
+#include "dungeongen.h"
+#include "cavegen.h"
+#include "mg_biome.h"
+#include "mg_ore.h"
+#include "mg_decoration.h"
+#include "mapgen_fractal.h"
+
+
+FlagDesc flagdesc_mapgen_fractal[] = {
+	{NULL,    0}
+};
+
+///////////////////////////////////////////////////////////////////////////////////////
+
+
+MapgenFractal::MapgenFractal(int mapgenid, MapgenFractalParams *params, EmergeManager *emerge)
+	: MapgenBasic(mapgenid, params, emerge)
+{
+	spflags          = params->spflags;
+	cave_width       = params->cave_width;
+	large_cave_depth = params->large_cave_depth;
+	lava_depth       = params->lava_depth;
+	fractal          = params->fractal;
+	iterations       = params->iterations;
+	scale            = params->scale;
+	offset           = params->offset;
+	slice_w          = params->slice_w;
+	julia_x          = params->julia_x;
+	julia_y          = params->julia_y;
+	julia_z          = params->julia_z;
+	julia_w          = params->julia_w;
+
+	//// 2D terrain noise
+	noise_seabed       = new Noise(&params->np_seabed, seed, csize.X, csize.Z);
+	noise_filler_depth = new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
+
+	MapgenBasic::np_cave1 = params->np_cave1;
+	MapgenBasic::np_cave2 = params->np_cave2;
+
+	formula = fractal / 2 + fractal % 2;
+	julia   = fractal % 2 == 0;
+}
+
+
+MapgenFractal::~MapgenFractal()
+{
+	delete noise_seabed;
+	delete noise_filler_depth;
+}
+
+
+MapgenFractalParams::MapgenFractalParams():
+	np_seabed       (-14, 9,   v3f(600, 600, 600), 41900, 5, 0.6, 2.0),
+	np_filler_depth (0,   1.2, v3f(150, 150, 150), 261,   3, 0.7, 2.0),
+	np_cave1        (0,   12,  v3f(61,  61,  61),  52534, 3, 0.5, 2.0),
+	np_cave2        (0,   12,  v3f(67,  67,  67),  10325, 3, 0.5, 2.0)
+{
+}
+
+
+void MapgenFractalParams::readParams(const Settings *settings)
+{
+	settings->getFlagStrNoEx("mgfractal_spflags",      spflags, flagdesc_mapgen_fractal);
+	settings->getFloatNoEx("mgfractal_cave_width",     cave_width);
+	settings->getS16NoEx("mgfractal_large_cave_depth", large_cave_depth);
+	settings->getS16NoEx("mgfractal_lava_depth",       lava_depth);
+	settings->getU16NoEx("mgfractal_fractal",          fractal);
+	settings->getU16NoEx("mgfractal_iterations",       iterations);
+	settings->getV3FNoEx("mgfractal_scale",            scale);
+	settings->getV3FNoEx("mgfractal_offset",           offset);
+	settings->getFloatNoEx("mgfractal_slice_w",        slice_w);
+	settings->getFloatNoEx("mgfractal_julia_x",        julia_x);
+	settings->getFloatNoEx("mgfractal_julia_y",        julia_y);
+	settings->getFloatNoEx("mgfractal_julia_z",        julia_z);
+	settings->getFloatNoEx("mgfractal_julia_w",        julia_w);
+
+	settings->getNoiseParams("mgfractal_np_seabed",       np_seabed);
+	settings->getNoiseParams("mgfractal_np_filler_depth", np_filler_depth);
+	settings->getNoiseParams("mgfractal_np_cave1",        np_cave1);
+	settings->getNoiseParams("mgfractal_np_cave2",        np_cave2);
+}
+
+
+void MapgenFractalParams::writeParams(Settings *settings) const
+{
+	settings->setFlagStr("mgfractal_spflags",      spflags, flagdesc_mapgen_fractal, U32_MAX);
+	settings->setFloat("mgfractal_cave_width",     cave_width);
+	settings->setS16("mgfractal_large_cave_depth", large_cave_depth);
+	settings->setS16("mgfractal_lava_depth",       lava_depth);
+	settings->setU16("mgfractal_fractal",          fractal);
+	settings->setU16("mgfractal_iterations",       iterations);
+	settings->setV3F("mgfractal_scale",            scale);
+	settings->setV3F("mgfractal_offset",           offset);
+	settings->setFloat("mgfractal_slice_w",        slice_w);
+	settings->setFloat("mgfractal_julia_x",        julia_x);
+	settings->setFloat("mgfractal_julia_y",        julia_y);
+	settings->setFloat("mgfractal_julia_z",        julia_z);
+	settings->setFloat("mgfractal_julia_w",        julia_w);
+
+	settings->setNoiseParams("mgfractal_np_seabed",       np_seabed);
+	settings->setNoiseParams("mgfractal_np_filler_depth", np_filler_depth);
+	settings->setNoiseParams("mgfractal_np_cave1",        np_cave1);
+	settings->setNoiseParams("mgfractal_np_cave2",        np_cave2);
+}
+
+
+/////////////////////////////////////////////////////////////////
+
+
+int MapgenFractal::getSpawnLevelAtPoint(v2s16 p)
+{
+	bool solid_below = false;  // Dry solid node is present below to spawn on
+	u8 air_count = 0;  // Consecutive air nodes above the dry solid node
+	s16 seabed_level = NoisePerlin2D(&noise_seabed->np, p.X, p.Y, seed);
+	// Seabed can rise above water_level or might be raised to create dry land
+	s16 search_start = MYMAX(seabed_level, water_level + 1);
+	if (seabed_level > water_level)
+		solid_below = true;
+
+	for (s16 y = search_start; y <= search_start + 128; y++) {
+		if (getFractalAtPoint(p.X, y, p.Y)) {  // Fractal node
+			solid_below = true;
+			air_count = 0;
+		} else if (solid_below) {  // Air above solid node
+			air_count++;
+			// 3 to account for snowblock dust
+			if (air_count == 3)
+				return y - 2;
+		}
+	}
+
+	return MAX_MAP_GENERATION_LIMIT;  // Unsuitable spawn point
+}
+
+
+void MapgenFractal::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);
+	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;
+	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 = getBlockSeed2(full_node_min, seed);
+
+	// Generate base terrain, mountains, and ridges with initial heightmaps
+	s16 stone_surface_max_y = generateTerrain();
+
+	// Create heightmap
+	updateHeightmap(node_min, node_max);
+
+	// Init biome generator, place biome-specific nodes, and build biomemap
+	biomegen->calcBiomeNoise(node_min);
+
+	MgStoneType mgstone_type;
+	content_t biome_stone;
+	generateBiomes(&mgstone_type, &biome_stone);
+
+	if (flags & MG_CAVES)
+		generateCaves(stone_surface_max_y, large_cave_depth);
+
+	if (flags & MG_DUNGEONS)
+		generateDungeons(stone_surface_max_y, mgstone_type, biome_stone);
+
+	// 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);
+
+	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;
+}
+
+
+bool MapgenFractal::getFractalAtPoint(s16 x, s16 y, s16 z)
+{
+	float cx, cy, cz, cw, ox, oy, oz, ow;
+
+	if (julia) {  // Julia set
+		cx = julia_x;
+		cy = julia_y;
+		cz = julia_z;
+		cw = julia_w;
+		ox = (float)x / scale.X - offset.X;
+		oy = (float)y / scale.Y - offset.Y;
+		oz = (float)z / scale.Z - offset.Z;
+		ow = slice_w;
+	} else {  // Mandelbrot set
+		cx = (float)x / scale.X - offset.X;
+		cy = (float)y / scale.Y - offset.Y;
+		cz = (float)z / scale.Z - offset.Z;
+		cw = slice_w;
+		ox = 0.0f;
+		oy = 0.0f;
+		oz = 0.0f;
+		ow = 0.0f;
+	}
+
+	float nx = 0.0f;
+	float ny = 0.0f;
+	float nz = 0.0f;
+	float nw = 0.0f;
+
+	for (u16 iter = 0; iter < iterations; iter++) {
+		switch (formula) {
+		default:
+		case 1: // 4D "Roundy"
+			nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
+			ny = 2.0f * (ox * oy + oz * ow) + cy;
+			nz = 2.0f * (ox * oz + oy * ow) + cz;
+			nw = 2.0f * (ox * ow + oy * oz) + cw;
+			break;
+		case 2: // 4D "Squarry"
+			nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
+			ny = 2.0f * (ox * oy + oz * ow) + cy;
+			nz = 2.0f * (ox * oz + oy * ow) + cz;
+			nw = 2.0f * (ox * ow - oy * oz) + cw;
+			break;
+		case 3: // 4D "Mandy Cousin"
+			nx = ox * ox - oy * oy - oz * oz + ow * ow + cx;
+			ny = 2.0f * (ox * oy + oz * ow) + cy;
+			nz = 2.0f * (ox * oz + oy * ow) + cz;
+			nw = 2.0f * (ox * ow + oy * oz) + cw;
+			break;
+		case 4: // 4D "Variation"
+			nx = ox * ox - oy * oy - oz * oz - ow * ow + cx;
+			ny = 2.0f * (ox * oy + oz * ow) + cy;
+			nz = 2.0f * (ox * oz - oy * ow) + cz;
+			nw = 2.0f * (ox * ow + oy * oz) + cw;
+			break;
+		case 5: // 3D "Mandelbrot/Mandelbar"
+			nx = ox * ox - oy * oy - oz * oz + cx;
+			ny = 2.0f * ox * oy + cy;
+			nz = -2.0f * ox * oz + cz;
+			break;
+		case 6: // 3D "Christmas Tree"
+			// Altering the formula here is necessary to avoid division by zero
+			if (fabs(oz) < 0.000000001f) {
+				nx = ox * ox - oy * oy - oz * oz + cx;
+				ny = 2.0f * oy * ox + cy;
+				nz = 4.0f * oz * ox + cz;
+			} else {
+				float a = (2.0f * ox) / (sqrt(oy * oy + oz * oz));
+				nx = ox * ox - oy * oy - oz * oz + cx;
+				ny = a * (oy * oy - oz * oz) + cy;
+				nz = a * 2.0f * oy * oz + cz;
+			}
+			break;
+		case 7: // 3D "Mandelbulb"
+			if (fabs(oy) < 0.000000001f) {
+				nx = ox * ox - oz * oz + cx;
+				ny = cy;
+				nz = -2.0f * oz * sqrt(ox * ox) + cz;
+			} else {
+				float a = 1.0f - (oz * oz) / (ox * ox + oy * oy);
+				nx = (ox * ox - oy * oy) * a + cx;
+				ny = 2.0f * ox * oy * a + cy;
+				nz = -2.0f * oz * sqrt(ox * ox + oy * oy) + cz;
+			}
+			break;
+		case 8: // 3D "Cosine Mandelbulb"
+			if (fabs(oy) < 0.000000001f) {
+				nx = 2.0f * ox * oz + cx;
+				ny = 4.0f * oy * oz + cy;
+				nz = oz * oz - ox * ox - oy * oy + cz;
+			} else {
+				float a = (2.0f * oz) / sqrt(ox * ox + oy * oy);
+				nx = (ox * ox - oy * oy) * a + cx;
+				ny = 2.0f * ox * oy * a + cy;
+				nz = oz * oz - ox * ox - oy * oy + cz;
+			}
+			break;
+		case 9: // 4D "Mandelbulb"
+			float rxy = sqrt(ox * ox + oy * oy);
+			float rxyz = sqrt(ox * ox + oy * oy + oz * oz);
+			if (fabs(ow) < 0.000000001f && fabs(oz) < 0.000000001f) {
+				nx = (ox * ox - oy * oy) + cx;
+				ny = 2.0f * ox * oy + cy;
+				nz = -2.0f * rxy * oz + cz;
+				nw = 2.0f * rxyz * ow + cw;
+			} else {
+				float a = 1.0f - (ow * ow) / (rxyz * rxyz);
+				float b = a * (1.0f - (oz * oz) / (rxy * rxy));
+				nx = (ox * ox - oy * oy) * b + cx;
+				ny = 2.0f * ox * oy * b + cy;
+				nz = -2.0f * rxy * oz * a + cz;
+				nw = 2.0f * rxyz * ow + cw;
+			}
+			break;
+		}
+
+		if (nx * nx + ny * ny + nz * nz + nw * nw > 4.0f)
+			return false;
+
+		ox = nx;
+		oy = ny;
+		oz = nz;
+		ow = nw;
+	}
+
+	return true;
+}
+
+
+s16 MapgenFractal::generateTerrain()
+{
+	MapNode n_air(CONTENT_AIR);
+	MapNode n_stone(c_stone);
+	MapNode n_water(c_water_source);
+
+	s16 stone_surface_max_y = -MAX_MAP_GENERATION_LIMIT;
+	u32 index2d = 0;
+
+	noise_seabed->perlinMap2D(node_min.X, node_min.Z);
+
+	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++, vi++, index2d++) {
+				if (vm->m_data[vi].getContent() == CONTENT_IGNORE) {
+					s16 seabed_height = noise_seabed->result[index2d];
+
+					if (y <= seabed_height || getFractalAtPoint(x, y, z)) {
+						vm->m_data[vi] = n_stone;
+						if (y > stone_surface_max_y)
+							stone_surface_max_y = y;
+					} else if (y <= water_level) {
+						vm->m_data[vi] = n_water;
+					} else {
+						vm->m_data[vi] = n_air;
+					}
+				}
+			}
+			index2d -= ystride;
+		}
+		index2d += ystride;
+	}
+
+	return stone_surface_max_y;
+}