src/nodedef.h

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #pragma once
  21
  22 #include "irrlichttypes_bloated.h"
  23 #include <string>
  24 #include <iostream>
  25 #include <map>
  26 #include "mapnode.h"
  27 #include "nameidmapping.h"
  28 #ifndef SERVER
  29 #include "client/tile.h"
  30 #include <IMeshManipulator.h>
  31 class Client;
  32 #endif
  33 #include "itemgroup.h"
  34 #include "sound.h" // SimpleSoundSpec
  35 #include "constants.h" // BS
  36 #include "texture_override.h" // TextureOverride
  37 #include "tileanimation.h"
  38
  39 // PROTOCOL_VERSION >= 37
  40 static const u8 CONTENTFEATURES_VERSION = 13;
  41
  42 class IItemDefManager;
  43 class ITextureSource;
  44 class IShaderSource;
  45 class IGameDef;
  46 class NodeResolver;
  47
  48 enum ContentParamType
  49 {
  50         CPT_NONE,
  51         CPT_LIGHT,
  52 };
  53
  54 enum ContentParamType2
  55 {
  56         CPT2_NONE,
  57         // Need 8-bit param2
  58         CPT2_FULL,
  59         // Flowing liquid properties
  60         CPT2_FLOWINGLIQUID,
  61         // Direction for chests and furnaces and such
  62         CPT2_FACEDIR,
  63         // Direction for signs, torches and such
  64         CPT2_WALLMOUNTED,
  65         // Block level like FLOWINGLIQUID
  66         CPT2_LEVELED,
  67         // 2D rotation for things like plants
  68         CPT2_DEGROTATE,
  69         // Mesh options for plants
  70         CPT2_MESHOPTIONS,
  71         // Index for palette
  72         CPT2_COLOR,
  73         // 3 bits of palette index, then facedir
  74         CPT2_COLORED_FACEDIR,
  75         // 5 bits of palette index, then wallmounted
  76         CPT2_COLORED_WALLMOUNTED,
  77         // Glasslike framed drawtype internal liquid level, param2 values 0 to 63
  78         CPT2_GLASSLIKE_LIQUID_LEVEL,
  79 };
  80
  81 enum LiquidType
  82 {
  83         LIQUID_NONE,
  84         LIQUID_FLOWING,
  85         LIQUID_SOURCE,
  86 };
  87
  88 enum NodeBoxType
  89 {
  90         NODEBOX_REGULAR, // Regular block; allows buildable_to
  91         NODEBOX_FIXED, // Static separately defined box(es)
  92         NODEBOX_WALLMOUNTED, // Box for wall mounted nodes; (top, bottom, side)
  93         NODEBOX_LEVELED, // Same as fixed, but with dynamic height from param2. for snow, ...
  94         NODEBOX_CONNECTED, // optionally draws nodeboxes if a neighbor node attaches
  95 };
  96
  97 struct NodeBox
  98 {
  99         enum NodeBoxType type;
 100         // NODEBOX_REGULAR (no parameters)
 101         // NODEBOX_FIXED
 102         std::vector<aabb3f> fixed;
 103         // NODEBOX_WALLMOUNTED
 104         aabb3f wall_top;
 105         aabb3f wall_bottom;
 106         aabb3f wall_side; // being at the -X side
 107         // NODEBOX_CONNECTED
 108         std::vector<aabb3f> connect_top;
 109         std::vector<aabb3f> connect_bottom;
 110         std::vector<aabb3f> connect_front;
 111         std::vector<aabb3f> connect_left;
 112         std::vector<aabb3f> connect_back;
 113         std::vector<aabb3f> connect_right;
 114         std::vector<aabb3f> disconnected_top;
 115         std::vector<aabb3f> disconnected_bottom;
 116         std::vector<aabb3f> disconnected_front;
 117         std::vector<aabb3f> disconnected_left;
 118         std::vector<aabb3f> disconnected_back;
 119         std::vector<aabb3f> disconnected_right;
 120         std::vector<aabb3f> disconnected;
 121         std::vector<aabb3f> disconnected_sides;
 122
 123         NodeBox()
 124         { reset(); }
 125
 126         void reset();
 127         void serialize(std::ostream &os, u16 protocol_version) const;
 128         void deSerialize(std::istream &is);
 129 };
 130
 131 struct MapNode;
 132 class NodeMetadata;
 133
 134 enum LeavesStyle {
 135         LEAVES_FANCY,
 136         LEAVES_SIMPLE,
 137         LEAVES_OPAQUE,
 138 };
 139
 140 enum AutoScale : u8 {
 141         AUTOSCALE_DISABLE,
 142         AUTOSCALE_ENABLE,
 143         AUTOSCALE_FORCE,
 144 };
 145
 146 enum WorldAlignMode : u8 {
 147         WORLDALIGN_DISABLE,
 148         WORLDALIGN_ENABLE,
 149         WORLDALIGN_FORCE,
 150         WORLDALIGN_FORCE_NODEBOX,
 151 };
 152
 153 class TextureSettings {
 154 public:
 155         LeavesStyle leaves_style;
 156         WorldAlignMode world_aligned_mode;
 157         AutoScale autoscale_mode;
 158         int node_texture_size;
 159         bool opaque_water;
 160         bool connected_glass;
 161         bool enable_mesh_cache;
 162         bool enable_minimap;
 163
 164         TextureSettings() = default;
 165
 166         void readSettings();
 167 };
 168
 169 enum NodeDrawType
 170 {
 171         // A basic solid block
 172         NDT_NORMAL,
 173         // Nothing is drawn
 174         NDT_AIRLIKE,
 175         // Do not draw face towards same kind of flowing/source liquid
 176         NDT_LIQUID,
 177         // A very special kind of thing
 178         NDT_FLOWINGLIQUID,
 179         // Glass-like, don't draw faces towards other glass
 180         NDT_GLASSLIKE,
 181         // Leaves-like, draw all faces no matter what
 182         NDT_ALLFACES,
 183         // Enabled -> ndt_allfaces, disabled -> ndt_normal
 184         NDT_ALLFACES_OPTIONAL,
 185         // Single plane perpendicular to a surface
 186         NDT_TORCHLIKE,
 187         // Single plane parallel to a surface
 188         NDT_SIGNLIKE,
 189         // 2 vertical planes in a 'X' shape diagonal to XZ axes.
 190         // paramtype2 = "meshoptions" allows various forms, sizes and
 191         // vertical and horizontal random offsets.
 192         NDT_PLANTLIKE,
 193         // Fenceposts that connect to neighbouring fenceposts with horizontal bars
 194         NDT_FENCELIKE,
 195         // Selects appropriate junction texture to connect like rails to
 196         // neighbouring raillikes.
 197         NDT_RAILLIKE,
 198         // Custom Lua-definable structure of multiple cuboids
 199         NDT_NODEBOX,
 200         // Glass-like, draw connected frames and all visible faces.
 201         // param2 > 0 defines 64 levels of internal liquid
 202         // Uses 3 textures, one for frames, second for faces,
 203         // optional third is a 'special tile' for the liquid.
 204         NDT_GLASSLIKE_FRAMED,
 205         // Draw faces slightly rotated and only on neighbouring nodes
 206         NDT_FIRELIKE,
 207         // Enabled -> ndt_glasslike_framed, disabled -> ndt_glasslike
 208         NDT_GLASSLIKE_FRAMED_OPTIONAL,
 209         // Uses static meshes
 210         NDT_MESH,
 211         // Combined plantlike-on-solid
 212         NDT_PLANTLIKE_ROOTED,
 213 };
 214
 215 // Mesh options for NDT_PLANTLIKE with CPT2_MESHOPTIONS
 216 static const u8 MO_MASK_STYLE          = 0x07;
 217 static const u8 MO_BIT_RANDOM_OFFSET   = 0x08;
 218 static const u8 MO_BIT_SCALE_SQRT2     = 0x10;
 219 static const u8 MO_BIT_RANDOM_OFFSET_Y = 0x20;
 220 enum PlantlikeStyle {
 221         PLANT_STYLE_CROSS,
 222         PLANT_STYLE_CROSS2,
 223         PLANT_STYLE_STAR,
 224         PLANT_STYLE_HASH,
 225         PLANT_STYLE_HASH2,
 226 };
 227
 228 enum AlignStyle : u8 {
 229         ALIGN_STYLE_NODE,
 230         ALIGN_STYLE_WORLD,
 231         ALIGN_STYLE_USER_DEFINED,
 232 };
 233
 234 /*
 235         Stand-alone definition of a TileSpec (basically a server-side TileSpec)
 236 */
 237
 238 struct TileDef
 239 {
 240         std::string name = "";
 241         bool backface_culling = true; // Takes effect only in special cases
 242         bool tileable_horizontal = true;
 243         bool tileable_vertical = true;
 244         //! If true, the tile has its own color.
 245         bool has_color = false;
 246         //! The color of the tile.
 247         video::SColor color = video::SColor(0xFFFFFFFF);
 248         AlignStyle align_style = ALIGN_STYLE_NODE;
 249         u8 scale = 0;
 250
 251         struct TileAnimationParams animation;
 252
 253         TileDef()
 254         {
 255                 animation.type = TAT_NONE;
 256         }
 257
 258         void serialize(std::ostream &os, u16 protocol_version) const;
 259         void deSerialize(std::istream &is, u8 contentfeatures_version,
 260                 NodeDrawType drawtype);
 261 };
 262
 263 // Defines the number of special tiles per nodedef
 264 //
 265 // NOTE: When changing this value, the enum entries of OverrideTarget and
 266 //       parser in TextureOverrideSource must be updated so that all special
 267 //       tiles can be overridden.
 268 #define CF_SPECIAL_COUNT 6
 269
 270 struct ContentFeatures
 271 {
 272         /*
 273                 Cached stuff
 274          */
 275 #ifndef SERVER
 276         // 0     1     2     3     4     5
 277         // up    down  right left  back  front
 278         TileSpec tiles[6];
 279         // Special tiles
 280         // - Currently used for flowing liquids
 281         TileSpec special_tiles[CF_SPECIAL_COUNT];
 282         u8 solidness; // Used when choosing which face is drawn
 283         u8 visual_solidness; // When solidness=0, this tells how it looks like
 284         bool backface_culling;
 285 #endif
 286
 287         // Server-side cached callback existence for fast skipping
 288         bool has_on_construct;
 289         bool has_on_destruct;
 290         bool has_after_destruct;
 291
 292         /*
 293                 Actual data
 294          */
 295
 296         // --- GENERAL PROPERTIES ---
 297
 298         std::string name; // "" = undefined node
 299         ItemGroupList groups; // Same as in itemdef
 300         // Type of MapNode::param1
 301         ContentParamType param_type;
 302         // Type of MapNode::param2
 303         ContentParamType2 param_type_2;
 304
 305         // --- VISUAL PROPERTIES ---
 306
 307         enum NodeDrawType drawtype;
 308         std::string mesh;
 309 #ifndef SERVER
 310         scene::IMesh *mesh_ptr[24];
 311         video::SColor minimap_color;
 312 #endif
 313         float visual_scale; // Misc. scale parameter
 314         TileDef tiledef[6];
 315         // These will be drawn over the base tiles.
 316         TileDef tiledef_overlay[6];
 317         TileDef tiledef_special[CF_SPECIAL_COUNT]; // eg. flowing liquid
 318         // If 255, the node is opaque.
 319         // Otherwise it uses texture alpha.
 320         u8 alpha;
 321         // The color of the node.
 322         video::SColor color;
 323         std::string palette_name;
 324         std::vector<video::SColor> *palette;
 325         // Used for waving leaves/plants
 326         u8 waving;
 327         // for NDT_CONNECTED pairing
 328         u8 connect_sides;
 329         std::vector<std::string> connects_to;
 330         std::vector<content_t> connects_to_ids;
 331         // Post effect color, drawn when the camera is inside the node.
 332         video::SColor post_effect_color;
 333         // Flowing liquid or leveled nodebox, value = default level
 334         u8 leveled;
 335         // Maximum value for leveled nodes
 336         u8 leveled_max;
 337
 338         // --- LIGHTING-RELATED ---
 339
 340         bool light_propagates;
 341         bool sunlight_propagates;
 342         // Amount of light the node emits
 343         u8 light_source;
 344
 345         // --- MAP GENERATION ---
 346
 347         // True for all ground-like things like stone and mud, false for eg. trees
 348         bool is_ground_content;
 349
 350         // --- INTERACTION PROPERTIES ---
 351
 352         // This is used for collision detection.
 353         // Also for general solidness queries.
 354         bool walkable;
 355         // Player can point to these
 356         bool pointable;
 357         // Player can dig these
 358         bool diggable;
 359         // Player can climb these
 360         bool climbable;
 361         // Player can build on these
 362         bool buildable_to;
 363         // Player cannot build to these (placement prediction disabled)
 364         bool rightclickable;
 365         u32 damage_per_second;
 366         // client dig prediction
 367         std::string node_dig_prediction;
 368
 369         // --- LIQUID PROPERTIES ---
 370
 371         // Whether the node is non-liquid, source liquid or flowing liquid
 372         enum LiquidType liquid_type;
 373         // If the content is liquid, this is the flowing version of the liquid.
 374         std::string liquid_alternative_flowing;
 375         content_t liquid_alternative_flowing_id;
 376         // If the content is liquid, this is the source version of the liquid.
 377         std::string liquid_alternative_source;
 378         content_t liquid_alternative_source_id;
 379         // Viscosity for fluid flow, ranging from 1 to 7, with
 380         // 1 giving almost instantaneous propagation and 7 being
 381         // the slowest possible
 382         u8 liquid_viscosity;
 383         // Is liquid renewable (new liquid source will be created between 2 existing)
 384         bool liquid_renewable;
 385         // Number of flowing liquids surrounding source
 386         u8 liquid_range;
 387         u8 drowning;
 388         // Liquids flow into and replace node
 389         bool floodable;
 390
 391         // --- NODEBOXES ---
 392
 393         NodeBox node_box;
 394         NodeBox selection_box;
 395         NodeBox collision_box;
 396
 397         // --- SOUND PROPERTIES ---
 398
 399         SimpleSoundSpec sound_footstep;
 400         SimpleSoundSpec sound_dig;
 401         SimpleSoundSpec sound_dug;
 402
 403         // --- LEGACY ---
 404
 405         // Compatibility with old maps
 406         // Set to true if paramtype used to be 'facedir_simple'
 407         bool legacy_facedir_simple;
 408         // Set to true if wall_mounted used to be set to true
 409         bool legacy_wallmounted;
 410
 411         /*
 412                 Methods
 413         */
 414
 415         ContentFeatures();
 416         ~ContentFeatures();
 417         void reset();
 418         void serialize(std::ostream &os, u16 protocol_version) const;
 419         void deSerialize(std::istream &is);
 420
 421         /*!
 422          * Since vertex alpha is no longer supported, this method
 423          * adds opacity directly to the texture pixels.
 424          *
 425          * \param tiles array of the tile definitions.
 426          * \param length length of tiles
 427          */
 428         void correctAlpha(TileDef *tiles, int length);
 429
 430 #ifndef SERVER
 431         /*
 432          * Checks if any tile texture has any transparent pixels.
 433          * Prints a warning and returns true if that is the case, false otherwise.
 434          * This is supposed to be used for use_texture_alpha backwards compatibility.
 435          */
 436         bool textureAlphaCheck(ITextureSource *tsrc, const TileDef *tiles,
 437                 int length);
 438 #endif
 439
 440
 441         /*
 442                 Some handy methods
 443         */
 444         bool needsBackfaceCulling() const
 445         {
 446                 switch (drawtype) {
 447                 case NDT_TORCHLIKE:
 448                 case NDT_SIGNLIKE:
 449                 case NDT_FIRELIKE:
 450                 case NDT_RAILLIKE:
 451                 case NDT_PLANTLIKE:
 452                 case NDT_PLANTLIKE_ROOTED:
 453                 case NDT_MESH:
 454                         return false;
 455                 default:
 456                         return true;
 457                 }
 458         }
 459
 460         bool isLiquid() const{
 461                 return (liquid_type != LIQUID_NONE);
 462         }
 463         bool sameLiquid(const ContentFeatures &f) const{
 464                 if(!isLiquid() || !f.isLiquid()) return false;
 465                 return (liquid_alternative_flowing_id == f.liquid_alternative_flowing_id);
 466         }
 467
 468         int getGroup(const std::string &group) const
 469         {
 470                 return itemgroup_get(groups, group);
 471         }
 472
 473 #ifndef SERVER
 474         void updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc,
 475                 scene::IMeshManipulator *meshmanip, Client *client, const TextureSettings &tsettings);
 476 #endif
 477 };
 478
 479 /*!
 480  * @brief This class is for getting the actual properties of nodes from their
 481  * content ID.
 482  *
 483  * @details The nodes on the map are represented by three numbers (see MapNode).
 484  * The first number (param0) is the type of a node. All node types have own
 485  * properties (see ContentFeatures). This class is for storing and getting the
 486  * properties of nodes.
 487  * The manager is first filled with registered nodes, then as the game begins,
 488  * functions only get `const` pointers to it, to prevent modification of
 489  * registered nodes.
 490  */
 491 class NodeDefManager {
 492 public:
 493         /*!
 494          * Creates a NodeDefManager, and registers three ContentFeatures:
 495          * \ref CONTENT_AIR, \ref CONTENT_UNKNOWN and \ref CONTENT_IGNORE.
 496          */
 497         NodeDefManager();
 498         ~NodeDefManager();
 499
 500         /*!
 501          * Returns the properties for the given content type.
 502          * @param c content type of a node
 503          * @return properties of the given content type, or \ref CONTENT_UNKNOWN
 504          * if the given content type is not registered.
 505          */
 506         inline const ContentFeatures& get(content_t c) const {
 507                 return
 508                         c < m_content_features.size() ?
 509                                 m_content_features[c] : m_content_features[CONTENT_UNKNOWN];
 510         }
 511
 512         /*!
 513          * Returns the properties of the given node.
 514          * @param n a map node
 515          * @return properties of the given node or @ref CONTENT_UNKNOWN if the
 516          * given content type is not registered.
 517          */
 518         inline const ContentFeatures& get(const MapNode &n) const {
 519                 return get(n.getContent());
 520         }
 521
 522         /*!
 523          * Returns the node properties for a node name.
 524          * @param name name of a node
 525          * @return properties of the given node or @ref CONTENT_UNKNOWN if
 526          * not found
 527          */
 528         const ContentFeatures& get(const std::string &name) const;
 529
 530         /*!
 531          * Returns the content ID for the given name.
 532          * @param name a node name
 533          * @param[out] result will contain the content ID if found, otherwise
 534          * remains unchanged
 535          * @return true if the ID was found, false otherwise
 536          */
 537         bool getId(const std::string &name, content_t &result) const;
 538
 539         /*!
 540          * Returns the content ID for the given name.
 541          * @param name a node name
 542          * @return ID of the node or @ref CONTENT_IGNORE if not found
 543          */
 544         content_t getId(const std::string &name) const;
 545
 546         /*!
 547          * Returns the content IDs of the given node name or node group name.
 548          * Group names start with "group:".
 549          * @param name a node name or node group name
 550          * @param[out] result will be appended with matching IDs
 551          * @return true if `name` is a valid node name or a (not necessarily
 552          * valid) group name
 553          */
 554         bool getIds(const std::string &name, std::vector<content_t> &result) const;
 555
 556         /*!
 557          * Returns the smallest box in integer node coordinates that
 558          * contains all nodes' selection boxes. The returned box might be larger
 559          * than the minimal size if the largest node is removed from the manager.
 560          */
 561         inline core::aabbox3d<s16> getSelectionBoxIntUnion() const {
 562                 return m_selection_box_int_union;
 563         }
 564
 565         /*!
 566          * Checks whether a node connects to an adjacent node.
 567          * @param from the node to be checked
 568          * @param to the adjacent node
 569          * @param connect_face a bit field indicating which face of the node is
 570          * adjacent to the other node.
 571          * Bits: +y (least significant), -y, -z, -x, +z, +x (most significant).
 572          * @return true if the node connects, false otherwise
 573          */
 574         bool nodeboxConnects(MapNode from, MapNode to,
 575                         u8 connect_face) const;
 576
 577         /*!
 578          * Registers a NodeResolver to wait for the registration of
 579          * ContentFeatures. Once the node registration finishes, all
 580          * listeners are notified.
 581          */
 582         void pendNodeResolve(NodeResolver *nr) const;
 583
 584         /*!
 585          * Stops listening to the NodeDefManager.
 586          * @return true if the listener was registered before, false otherwise
 587          */
 588         bool cancelNodeResolveCallback(NodeResolver *nr) const;
 589
 590         /*!
 591          * Registers a new node type with the given name and allocates a new
 592          * content ID.
 593          * Should not be called with an already existing name.
 594          * @param name name of the node, must match with `def.name`.
 595          * @param def definition of the registered node type.
 596          * @return ID of the registered node or @ref CONTENT_IGNORE if
 597          * the function could not allocate an ID.
 598          */
 599         content_t set(const std::string &name, const ContentFeatures &def);
 600
 601         /*!
 602          * Allocates a blank node ID for the given name.
 603          * @param name name of a node
 604          * @return allocated ID or @ref CONTENT_IGNORE if could not allocate
 605          * an ID.
 606          */
 607         content_t allocateDummy(const std::string &name);
 608
 609         /*!
 610          * Removes the given node name from the manager.
 611          * The node ID will remain in the manager, but won't be linked to any name.
 612          * @param name name to be removed
 613          */
 614         void removeNode(const std::string &name);
 615
 616         /*!
 617          * Regenerates the alias list (a map from names to node IDs).
 618          * @param idef the item definition manager containing alias information
 619          */
 620         void updateAliases(IItemDefManager *idef);
 621
 622         /*!
 623          * Replaces the textures of registered nodes with the ones specified in
 624          * the texturepack's override.txt file
 625          *
 626          * @param overrides the texture overrides
 627          */
 628         void applyTextureOverrides(const std::vector<TextureOverride> &overrides);
 629
 630         /*!
 631          * Only the client uses this. Loads textures and shaders required for
 632          * rendering the nodes.
 633          * @param gamedef must be a Client.
 634          * @param progress_cbk called each time a node is loaded. Arguments:
 635          * `progress_cbk_args`, number of loaded ContentFeatures, number of
 636          * total ContentFeatures.
 637          * @param progress_cbk_args passed to the callback function
 638          */
 639         void updateTextures(IGameDef *gamedef,
 640                 void (*progress_cbk)(void *progress_args, u32 progress, u32 max_progress),
 641                 void *progress_cbk_args);
 642
 643         /*!
 644          * Writes the content of this manager to the given output stream.
 645          * @param protocol_version serialization version of ContentFeatures
 646          */
 647         void serialize(std::ostream &os, u16 protocol_version) const;
 648
 649         /*!
 650          * Restores the manager from a serialized stream.
 651          * This clears the previous state.
 652          * @param is input stream containing a serialized NodeDefManager
 653          */
 654         void deSerialize(std::istream &is);
 655
 656         /*!
 657          * Used to indicate that node registration has finished.
 658          * @param completed tells whether registration is complete
 659          */
 660         inline void setNodeRegistrationStatus(bool completed) {
 661                 m_node_registration_complete = completed;
 662         }
 663
 664         /*!
 665          * Notifies the registered NodeResolver instances that node registration
 666          * has finished, then unregisters all listeners.
 667          * Must be called after node registration has finished!
 668          */
 669         void runNodeResolveCallbacks();
 670
 671         /*!
 672          * Sets the registration completion flag to false and unregisters all
 673          * NodeResolver instances listening to the manager.
 674          */
 675         void resetNodeResolveState();
 676
 677         /*!
 678          * Resolves (caches the IDs) cross-references between nodes,
 679          * like liquid alternatives.
 680          * Must be called after node registration has finished!
 681          */
 682         void resolveCrossrefs();
 683
 684 private:
 685         /*!
 686          * Resets the manager to its initial state.
 687          * See the documentation of the constructor.
 688          */
 689         void clear();
 690
 691         /*!
 692          * Allocates a new content ID, and returns it.
 693          * @return the allocated ID or \ref CONTENT_IGNORE if could not allocate
 694          */
 695         content_t allocateId();
 696
 697         /*!
 698          * Binds the given content ID and node name.
 699          * Registers them in \ref m_name_id_mapping and
 700          * \ref m_name_id_mapping_with_aliases.
 701          * @param i a content ID
 702          * @param name a node name
 703          */
 704         void addNameIdMapping(content_t i, std::string name);
 705
 706         /*!
 707          * Removes a content ID from all groups.
 708          * Erases content IDs from vectors in \ref m_group_to_items and
 709          * removes empty vectors.
 710          * @param id Content ID
 711          */
 712         void eraseIdFromGroups(content_t id);
 713
 714         /*!
 715          * Recalculates m_selection_box_int_union based on
 716          * m_selection_box_union.
 717          */
 718         void fixSelectionBoxIntUnion();
 719
 720         //! Features indexed by ID.
 721         std::vector<ContentFeatures> m_content_features;
 722
 723         //! A mapping for fast conversion between names and IDs
 724         NameIdMapping m_name_id_mapping;
 725
 726         /*!
 727          * Like @ref m_name_id_mapping, but maps only from names to IDs, and
 728          * includes aliases too. Updated by \ref updateAliases().
 729          * Note: Not serialized.
 730          */
 731         std::unordered_map<std::string, content_t> m_name_id_mapping_with_aliases;
 732
 733         /*!
 734          * A mapping from group names to a vector of content types that belong
 735          * to it. Necessary for a direct lookup in \ref getIds().
 736          * Note: Not serialized.
 737          */
 738         std::unordered_map<std::string, std::vector<content_t>> m_group_to_items;
 739
 740         /*!
 741          * The next ID that might be free to allocate.
 742          * It can be allocated already, because \ref CONTENT_AIR,
 743          * \ref CONTENT_UNKNOWN and \ref CONTENT_IGNORE are registered when the
 744          * manager is initialized, and new IDs are allocated from 0.
 745          */
 746         content_t m_next_id;
 747
 748         //! True if all nodes have been registered.
 749         bool m_node_registration_complete;
 750
 751         /*!
 752          * The union of all nodes' selection boxes.
 753          * Might be larger if big nodes are removed from the manager.
 754          */
 755         aabb3f m_selection_box_union;
 756
 757         /*!
 758          * The smallest box in integer node coordinates that
 759          * contains all nodes' selection boxes.
 760          * Might be larger if big nodes are removed from the manager.
 761          */
 762         core::aabbox3d<s16> m_selection_box_int_union;
 763
 764         /*!
 765          * NodeResolver instances to notify once node registration has finished.
 766          * Even constant NodeDefManager instances can register listeners.
 767          */
 768         mutable std::vector<NodeResolver *> m_pending_resolve_callbacks;
 769 };
 770
 771 NodeDefManager *createNodeDefManager();
 772
 773 class NodeResolver {
 774 public:
 775         NodeResolver();
 776         virtual ~NodeResolver();
 777         virtual void resolveNodeNames() = 0;
 778
 779         // required because this class is used as mixin for ObjDef
 780         void cloneTo(NodeResolver *res) const;
 781
 782         bool getIdFromNrBacklog(content_t *result_out,
 783                 const std::string &node_alt, content_t c_fallback,
 784                 bool error_on_fallback = true);
 785         bool getIdsFromNrBacklog(std::vector<content_t> *result_out,
 786                 bool all_required = false, content_t c_fallback = CONTENT_IGNORE);
 787
 788         void nodeResolveInternal();
 789
 790         u32 m_nodenames_idx = 0;
 791         u32 m_nnlistsizes_idx = 0;
 792         std::vector<std::string> m_nodenames;
 793         std::vector<size_t> m_nnlistsizes;
 794         const NodeDefManager *m_ndef = nullptr;
 795         bool m_resolve_done = false;
 796 };