Move files to subdirectories (#6599)

* Move files around

1 files changed, 377 insertions, 0 deletions

diff --git a/src/mapgen/mg_decoration.cpp b/src/mapgen/mg_decoration.cpp
new file mode 100644
index 000000000..2c2fbc647
--- /dev/null
+++ b/src/mapgen/mg_decoration.cpp
@@ -0,0 +1,377 @@
+/*
+Minetest
+Copyright (C) 2014-2016 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
+Copyright (C) 2015-2017 paramat
+
+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 "mg_decoration.h"
+#include "mg_schematic.h"
+#include "mapgen.h"
+#include "noise.h"
+#include "map.h"
+#include "log.h"
+#include "util/numeric.h"
+#include <algorithm>
+
+
+FlagDesc flagdesc_deco[] = {
+	{"place_center_x",  DECO_PLACE_CENTER_X},
+	{"place_center_y",  DECO_PLACE_CENTER_Y},
+	{"place_center_z",  DECO_PLACE_CENTER_Z},
+	{"force_placement", DECO_FORCE_PLACEMENT},
+	{"liquid_surface",  DECO_LIQUID_SURFACE},
+	{"all_floors",      DECO_ALL_FLOORS},
+	{"all_ceilings",    DECO_ALL_CEILINGS},
+	{NULL,              0}
+};
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+DecorationManager::DecorationManager(IGameDef *gamedef) :
+	ObjDefManager(gamedef, OBJDEF_DECORATION)
+{
+}
+
+
+size_t DecorationManager::placeAllDecos(Mapgen *mg, u32 blockseed,
+	v3s16 nmin, v3s16 nmax)
+{
+	size_t nplaced = 0;
+
+	for (size_t i = 0; i != m_objects.size(); i++) {
+		Decoration *deco = (Decoration *)m_objects[i];
+		if (!deco)
+			continue;
+
+		nplaced += deco->placeDeco(mg, blockseed, nmin, nmax);
+		blockseed++;
+	}
+
+	return nplaced;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+void Decoration::resolveNodeNames()
+{
+	getIdsFromNrBacklog(&c_place_on);
+	getIdsFromNrBacklog(&c_spawnby);
+}
+
+
+bool Decoration::canPlaceDecoration(MMVManip *vm, v3s16 p)
+{
+	// Check if the decoration can be placed on this node
+	u32 vi = vm->m_area.index(p);
+	if (!CONTAINS(c_place_on, vm->m_data[vi].getContent()))
+		return false;
+
+	// Don't continue if there are no spawnby constraints
+	if (nspawnby == -1)
+		return true;
+
+	int nneighs = 0;
+	static const v3s16 dirs[16] = {
+		v3s16( 0, 0,  1),
+		v3s16( 0, 0, -1),
+		v3s16( 1, 0,  0),
+		v3s16(-1, 0,  0),
+		v3s16( 1, 0,  1),
+		v3s16(-1, 0,  1),
+		v3s16(-1, 0, -1),
+		v3s16( 1, 0, -1),
+
+		v3s16( 0, 1,  1),
+		v3s16( 0, 1, -1),
+		v3s16( 1, 1,  0),
+		v3s16(-1, 1,  0),
+		v3s16( 1, 1,  1),
+		v3s16(-1, 1,  1),
+		v3s16(-1, 1, -1),
+		v3s16( 1, 1, -1)
+	};
+
+	// Check these 16 neighbouring nodes for enough spawnby nodes
+	for (size_t i = 0; i != ARRLEN(dirs); i++) {
+		u32 index = vm->m_area.index(p + dirs[i]);
+		if (!vm->m_area.contains(index))
+			continue;
+
+		if (CONTAINS(c_spawnby, vm->m_data[index].getContent()))
+			nneighs++;
+	}
+
+	if (nneighs < nspawnby)
+		return false;
+
+	return true;
+}
+
+
+size_t Decoration::placeDeco(Mapgen *mg, u32 blockseed, v3s16 nmin, v3s16 nmax)
+{
+	PcgRandom ps(blockseed + 53);
+	int carea_size = nmax.X - nmin.X + 1;
+
+	// Divide area into parts
+	// If chunksize is changed it may no longer be divisable by sidelen
+	if (carea_size % sidelen)
+		sidelen = carea_size;
+
+	s16 divlen = carea_size / sidelen;
+	int area = sidelen * sidelen;
+
+	for (s16 z0 = 0; z0 < divlen; z0++)
+	for (s16 x0 = 0; x0 < divlen; x0++) {
+		v2s16 p2d_center( // Center position of part of division
+			nmin.X + sidelen / 2 + sidelen * x0,
+			nmin.Z + sidelen / 2 + sidelen * z0
+		);
+		v2s16 p2d_min( // Minimum edge of part of division
+			nmin.X + sidelen * x0,
+			nmin.Z + sidelen * z0
+		);
+		v2s16 p2d_max( // Maximum edge of part of division
+			nmin.X + sidelen + sidelen * x0 - 1,
+			nmin.Z + sidelen + sidelen * z0 - 1
+		);
+
+		// Amount of decorations
+		float nval = (flags & DECO_USE_NOISE) ?
+			NoisePerlin2D(&np, p2d_center.X, p2d_center.Y, mapseed) :
+			fill_ratio;
+		u32 deco_count = 0;
+		float deco_count_f = (float)area * nval;
+		if (deco_count_f >= 1.f) {
+			deco_count = deco_count_f;
+		} else if (deco_count_f > 0.f) {
+			// For low density decorations calculate a chance for 1 decoration
+			if (ps.range(1000) <= deco_count_f * 1000.f)
+				deco_count = 1;
+		}
+
+		for (u32 i = 0; i < deco_count; i++) {
+			s16 x = ps.range(p2d_min.X, p2d_max.X);
+			s16 z = ps.range(p2d_min.Y, p2d_max.Y);
+			int mapindex = carea_size * (z - nmin.Z) + (x - nmin.X);
+
+			if ((flags & DECO_ALL_FLOORS) ||
+					(flags & DECO_ALL_CEILINGS)) {
+				// All-surfaces decorations
+				// Check biome of column
+				if (mg->biomemap && !biomes.empty()) {
+					std::unordered_set<u8>::const_iterator iter =
+						biomes.find(mg->biomemap[mapindex]);
+					if (iter == biomes.end())
+						continue;
+				}
+
+				// Get all floors and ceilings in node column
+				u16 size = (nmax.Y - nmin.Y + 1) / 2;
+				s16 floors[size];
+				s16 ceilings[size];
+				u16 num_floors = 0;
+				u16 num_ceilings = 0;
+
+				mg->getSurfaces(v2s16(x, z), nmin.Y, nmax.Y,
+					floors, ceilings, &num_floors, &num_ceilings);
+
+				if ((flags & DECO_ALL_FLOORS) && num_floors > 0) {
+					// Floor decorations
+					for (u16 fi = 0; fi < num_floors; fi++) {
+						s16 y = floors[fi];
+						if (y < y_min || y > y_max)
+							continue;
+
+						v3s16 pos(x, y, z);
+						if (generate(mg->vm, &ps, pos, false))
+							mg->gennotify.addEvent(
+									GENNOTIFY_DECORATION, pos, index);
+					}
+				}
+
+				if ((flags & DECO_ALL_CEILINGS) && num_ceilings > 0) {
+					// Ceiling decorations
+					for (u16 ci = 0; ci < num_ceilings; ci++) {
+						s16 y = ceilings[ci];
+						if (y < y_min || y > y_max)
+							continue;
+
+						v3s16 pos(x, y, z);
+						if (generate(mg->vm, &ps, pos, true))
+							mg->gennotify.addEvent(
+									GENNOTIFY_DECORATION, pos, index);
+					}
+				}
+			} else { // Heightmap decorations
+				s16 y = -MAX_MAP_GENERATION_LIMIT;
+				if (flags & DECO_LIQUID_SURFACE)
+					y = mg->findLiquidSurface(v2s16(x, z), nmin.Y, nmax.Y);
+				else if (mg->heightmap)
+					y = mg->heightmap[mapindex];
+				else
+					y = mg->findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);
+
+				if (y < y_min || y > y_max || y < nmin.Y || y > nmax.Y)
+					continue;
+
+				if (mg->biomemap && !biomes.empty()) {
+					std::unordered_set<u8>::const_iterator iter =
+						biomes.find(mg->biomemap[mapindex]);
+					if (iter == biomes.end())
+						continue;
+				}
+
+				v3s16 pos(x, y, z);
+				if (generate(mg->vm, &ps, pos, false))
+					mg->gennotify.addEvent(GENNOTIFY_DECORATION, pos, index);
+			}
+		}
+	}
+
+	return 0;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+void DecoSimple::resolveNodeNames()
+{
+	Decoration::resolveNodeNames();
+	getIdsFromNrBacklog(&c_decos);
+}
+
+
+size_t DecoSimple::generate(MMVManip *vm, PcgRandom *pr, v3s16 p, bool ceiling)
+{
+	// Don't bother if there aren't any decorations to place
+	if (c_decos.empty())
+		return 0;
+
+	if (!canPlaceDecoration(vm, p))
+		return 0;
+
+	// Check for placement outside the voxelmanip volume
+	if (ceiling) {
+		// Ceiling decorations
+		// 'place offset y' is inverted
+		if (p.Y - place_offset_y - std::max(deco_height, deco_height_max) <
+				vm->m_area.MinEdge.Y)
+			return 0;
+
+		if (p.Y - 1 - place_offset_y > vm->m_area.MaxEdge.Y)
+			return 0;
+
+	} else { // Heightmap and floor decorations
+		if (p.Y + place_offset_y + std::max(deco_height, deco_height_max) >
+				vm->m_area.MaxEdge.Y)
+			return 0;
+
+		if (p.Y + 1 + place_offset_y < vm->m_area.MinEdge.Y)
+			return 0;
+	}
+
+	content_t c_place = c_decos[pr->range(0, c_decos.size() - 1)];
+	s16 height = (deco_height_max > 0) ?
+		pr->range(deco_height, deco_height_max) : deco_height;
+	u8 param2 = (deco_param2_max > 0) ?
+		pr->range(deco_param2, deco_param2_max) : deco_param2;
+	bool force_placement = (flags & DECO_FORCE_PLACEMENT);
+
+	const v3s16 &em = vm->m_area.getExtent();
+	u32 vi = vm->m_area.index(p);
+
+	if (ceiling) {
+		// Ceiling decorations
+		// 'place offset y' is inverted
+		vm->m_area.add_y(em, vi, -place_offset_y);
+
+		for (int i = 0; i < height; i++) {
+			vm->m_area.add_y(em, vi, -1);
+			content_t c = vm->m_data[vi].getContent();
+			if (c != CONTENT_AIR && c != CONTENT_IGNORE && !force_placement)
+				break;
+
+			vm->m_data[vi] = MapNode(c_place, 0, param2);
+		}
+	} else { // Heightmap and floor decorations
+		vm->m_area.add_y(em, vi, place_offset_y);
+
+		for (int i = 0; i < height; i++) {
+			vm->m_area.add_y(em, vi, 1);
+			content_t c = vm->m_data[vi].getContent();
+			if (c != CONTENT_AIR && c != CONTENT_IGNORE && !force_placement)
+				break;
+
+			vm->m_data[vi] = MapNode(c_place, 0, param2);
+		}
+	}
+
+	return 1;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+
+
+size_t DecoSchematic::generate(MMVManip *vm, PcgRandom *pr, v3s16 p, bool ceiling)
+{
+	// Schematic could have been unloaded but not the decoration
+	// In this case generate() does nothing (but doesn't *fail*)
+	if (schematic == NULL)
+		return 0;
+
+	if (!canPlaceDecoration(vm, p))
+		return 0;
+
+	if (flags & DECO_PLACE_CENTER_Y) {
+		p.Y -= (schematic->size.Y - 1) / 2;
+	} else {
+		// Only apply 'place offset y' if not 'deco place center y'
+		if (ceiling)
+			// Shift down so that schematic top layer is level with ceiling
+			// 'place offset y' is inverted
+			p.Y -= (place_offset_y + schematic->size.Y - 1);
+		else
+			p.Y += place_offset_y;
+	}
+
+	// Check schematic top and base are in voxelmanip
+	if (p.Y + schematic->size.Y - 1 > vm->m_area.MaxEdge.Y)
+		return 0;
+
+	if (p.Y < vm->m_area.MinEdge.Y)
+		return 0;
+
+	if (flags & DECO_PLACE_CENTER_X)
+		p.X -= (schematic->size.X - 1) / 2;
+	if (flags & DECO_PLACE_CENTER_Z)
+		p.Z -= (schematic->size.Z - 1) / 2;
+
+	Rotation rot = (rotation == ROTATE_RAND) ?
+		(Rotation)pr->range(ROTATE_0, ROTATE_270) : rotation;
+	bool force_placement = (flags & DECO_FORCE_PLACEMENT);
+
+	schematic->blitToVManip(vm, p, rot, force_placement);
+
+	return 1;
+}