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Minetest Texture Pack Reference
===============================

Texture packs allow you to replace textures provided by a mod with your own
textures.

Texture pack directory structure
--------------------------------

    textures
    |-- Texture Pack
    |   |-- screenshot.png
    |   |-- description.txt
    |   |-- override.txt
    |   |-- your_texture_1.png
    |   |-- your_texture_2.png
    `-- Another Texture Pack

### Texture Pack
This is a directory containing the entire contents of a single texture pack.
It can be chosen more or less freely and will also become the name of the
texture pack. The name must not be “base”.

### `description.txt`
A file containing a short description of the texture pack to be shown in the
texture packs tab.

### `screenshot.png`
A preview image showing an in-game screenshot of this texture pack; it will be
shown in the texture packs tab. It should have an aspect ratio of 3:2 and a
minimum size of 300×200 pixels.

### `your_texture_1.png`, `your_texture_2.png`, etc.
Any other PNG files will be interpreted as textures. They must have the same
names as the textures they are supposed to override. For example, to override
the apple texture of Minetest Game, add a PNG file named `default_apple.png`.

The custom textures do not necceessarily require the same size as their
originals, but this might be required for a few particular textures. When
unsure, just test your texture pack in-game.

Texture modifiers
-----------------

See lua_api.txt for texture modifiers

Special textures
----------------

These texture names are hardcoded into the engine but can also be overwritten
by texture packs. All existing fallback textures can be found in the directory
`textures/base/pack`.

### Gameplay textures

* `bubble.png`: the bubble texture when the player is drowning

* `crack_anylength.png`: node overlay texture when digging

* `crosshair.png`
    * the crosshair texture in the center of the screen. The settings
      `crosshair_color` and `crosshair_alpha` are used to create a cross
      when no texture was found

* `halo.png`: used for the node highlighting mesh

* `heart.png`: used to display the health points of the player

* `minimap_mask_round.png`: round minimap mask, white gets replaced by the map
* `minimap_mask_square.png`: mask used for the square minimap
* `minimap_overlay_round.png`: overlay texture for the round minimap
* `minimap_overlay_square.png`: overlay texture for the square minimap
* `object_marker_red.png`: texture for players on the minimap
* `player_marker.png`: texture for the own player on the square minimap

* `player.png`: front texture of the 2D upright sprite player
* `player_back.png`: back texture of the 2D upright sprite player

* `moon.png`: texture of the moon. Default texture is generated by Minetest
* `moon_tonemap.png`: tonemap to be used when `moon.png` was found
* `sun.png`: texture of the sun. Default texture is generated by Minetest
* `sun_tonemap.png`: tonemap to be used when `sun.png` was found
* `sunrisebg.png`: shown sky texture when the sun rises

* `smoke_puff.png`: texture used when an object died by punching

* `unknown_item.png`: shown texture when an item definition was not found
* `unknown_node.png`: shown texture when a node definition was not found
* `unknown_object.png`: shown texture when an entity definition was not found

* `wieldhand.png`: texture of the wieldhand

### Mainmenu textures

* `menu_bg.png`: used as mainmenu background when the clouds are disabled
* `menu_header.png`: header texture when no texture pack is selected

* `no_screenshot.png`
    * texture when no screenshot was found for a texture pack or mod

* `server_flags_creative.png`: icon for creative servers
* `server_flags_damage.png`: icon for enabled damage on servers
* `server_flags_favorite.png`: icon for your favorite servers
* `server_flags_pvp.png`: icon for enabled PvP on servers

### Android textures

* `down_arrow.png`
* `left_arrow.png`
* `right_arrow.png`
* `up_arrow.png`

* `drop_btn.png`
* `fast_btn.png`
* `fly_btn.png`
* `jump_btn.png`
* `noclip_btn.png`

* `camera_btn.png`
* `chat_btn.png`
* `inventory_btn.png`
* `rangeview_btn.png`

* `debug_btn.png`
* `gear_icon.png`
* `rare_controls.png`

Texture Overrides
-----------------

You can override the textures of a node from a texture pack using
texture overrides. To do this, create a file in a texture pack
called override.txt

Each line in an override.txt file is a rule. It consists of

	nodename face-selector texture

For example,

	default:dirt_with_grass sides default_stone.png

You can use ^ operators as usual:

	default:dirt_with_grass sides default_stone.png^[brighten

Here are face selectors you can choose from:

| face-selector | behavior                                          |
|---------------|---------------------------------------------------|
| left          | x-                                                |
| right         | x+                                                |
| front         | z-                                                |
| back          | z+                                                |
| top           | y+                                                |
| bottom        | y-                                                |
| sides         | x-, x+, z-, z+                                    |
| all           | All faces. You can also use '*' instead of 'all'. |
n330'>330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 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/*
Minetest
Copyright (C) 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 "nodedef.h"

#include "itemdef.h"
#ifndef SERVER
#include "client/tile.h"
#include "mesh.h"
#include <IMeshManipulator.h>
#endif
#include "log.h"
#include "settings.h"
#include "nameidmapping.h"
#include "util/numeric.h"
#include "util/serialize.h"
#include "exceptions.h"
#include "debug.h"
#include "gamedef.h"
#include "mapnode.h"
#include <fstream> // Used in applyTextureOverrides()

/*
	NodeBox
*/

void NodeBox::reset()
{
	type = NODEBOX_REGULAR;
	// default is empty
	fixed.clear();
	// default is sign/ladder-like
	wall_top = aabb3f(-BS/2, BS/2-BS/16., -BS/2, BS/2, BS/2, BS/2);
	wall_bottom = aabb3f(-BS/2, -BS/2, -BS/2, BS/2, -BS/2+BS/16., BS/2);
	wall_side = aabb3f(-BS/2, -BS/2, -BS/2, -BS/2+BS/16., BS/2, BS/2);
	// no default for other parts
	connect_top.clear();
	connect_bottom.clear();
	connect_front.clear();
	connect_left.clear();
	connect_back.clear();
	connect_right.clear();
}

void NodeBox::serialize(std::ostream &os, u16 protocol_version) const
{
	int version = 1;
	if (protocol_version >= 27)
		version = 3;
	else if (protocol_version >= 21)
		version = 2;
	writeU8(os, version);

	switch (type) {
	case NODEBOX_LEVELED:
	case NODEBOX_FIXED:
		if (version == 1)
			writeU8(os, NODEBOX_FIXED);
		else
			writeU8(os, type);

		writeU16(os, fixed.size());
		for (std::vector<aabb3f>::const_iterator
				i = fixed.begin();
				i != fixed.end(); ++i)
		{
			writeV3F1000(os, i->MinEdge);
			writeV3F1000(os, i->MaxEdge);
		}
		break;
	case NODEBOX_WALLMOUNTED:
		writeU8(os, type);

		writeV3F1000(os, wall_top.MinEdge);
		writeV3F1000(os, wall_top.MaxEdge);
		writeV3F1000(os, wall_bottom.MinEdge);
		writeV3F1000(os, wall_bottom.MaxEdge);
		writeV3F1000(os, wall_side.MinEdge);
		writeV3F1000(os, wall_side.MaxEdge);
		break;
	case NODEBOX_CONNECTED:
		if (version <= 2) {
			// send old clients nodes that can't be walked through
			// to prevent abuse
			writeU8(os, NODEBOX_FIXED);

			writeU16(os, 1);
			writeV3F1000(os, v3f(-BS/2, -BS/2, -BS/2));
			writeV3F1000(os, v3f(BS/2, BS/2, BS/2));
		} else {
			writeU8(os, type);

#define WRITEBOX(box) do { \
		writeU16(os, (box).size()); \
		for (std::vector<aabb3f>::const_iterator \
				i = (box).begin(); \
				i != (box).end(); ++i) { \
			writeV3F1000(os, i->MinEdge); \
			writeV3F1000(os, i->MaxEdge); \
		}; } while (0)

			WRITEBOX(fixed);
			WRITEBOX(connect_top);
			WRITEBOX(connect_bottom);
			WRITEBOX(connect_front);
			WRITEBOX(connect_left);
			WRITEBOX(connect_back);
			WRITEBOX(connect_right);
		}
		break;
	default:
		writeU8(os, type);
		break;
	}
}

void NodeBox::deSerialize(std::istream &is)
{
	int version = readU8(is);
	if (version < 1 || version > 3)
		throw SerializationError("unsupported NodeBox version");

	reset();

	type = (enum NodeBoxType)readU8(is);

	if(type == NODEBOX_FIXED || type == NODEBOX_LEVELED)
	{
		u16 fixed_count = readU16(is);
		while(fixed_count--)
		{
			aabb3f box;
			box.MinEdge = readV3F1000(is);
			box.MaxEdge = readV3F1000(is);
			fixed.push_back(box);
		}
	}
	else if(type == NODEBOX_WALLMOUNTED)
	{
		wall_top.MinEdge = readV3F1000(is);
		wall_top.MaxEdge = readV3F1000(is);
		wall_bottom.MinEdge = readV3F1000(is);
		wall_bottom.MaxEdge = readV3F1000(is);
		wall_side.MinEdge = readV3F1000(is);
		wall_side.MaxEdge = readV3F1000(is);
	}
	else if (type == NODEBOX_CONNECTED)
	{
#define READBOXES(box) do { \
		count = readU16(is); \
		(box).reserve(count); \
		while (count--) { \
			v3f min = readV3F1000(is); \
			v3f max = readV3F1000(is); \
			(box).push_back(aabb3f(min, max)); }; } while (0)

		u16 count;

		READBOXES(fixed);
		READBOXES(connect_top);
		READBOXES(connect_bottom);
		READBOXES(connect_front);
		READBOXES(connect_left);
		READBOXES(connect_back);
		READBOXES(connect_right);
	}
}

/*
	TileDef
*/

void TileDef::serialize(std::ostream &os, u16 protocol_version) const
{
	if (protocol_version >= 26)
		writeU8(os, 2);
	else if (protocol_version >= 17)
		writeU8(os, 1);
	else
		writeU8(os, 0);
	os<<serializeString(name);
	writeU8(os, animation.type);
	writeU16(os, animation.aspect_w);
	writeU16(os, animation.aspect_h);
	writeF1000(os, animation.length);
	if (protocol_version >= 17)
		writeU8(os, backface_culling);
	if (protocol_version >= 26) {
		writeU8(os, tileable_horizontal);
		writeU8(os, tileable_vertical);
	}
}

void TileDef::deSerialize(std::istream &is, const u8 contenfeatures_version, const NodeDrawType drawtype)
{
	int version = readU8(is);
	name = deSerializeString(is);
	animation.type = (TileAnimationType)readU8(is);
	animation.aspect_w = readU16(is);
	animation.aspect_h = readU16(is);
	animation.length = readF1000(is);
	if (version >= 1)
		backface_culling = readU8(is);
	if (version >= 2) {
		tileable_horizontal = readU8(is);
		tileable_vertical = readU8(is);
	}

	if ((contenfeatures_version < 8) &&
		((drawtype == NDT_MESH) ||
		 (drawtype == NDT_FIRELIKE) ||
		 (drawtype == NDT_LIQUID) ||
		 (drawtype == NDT_PLANTLIKE)))
		backface_culling = false;
}


/*
	SimpleSoundSpec serialization
*/

static void serializeSimpleSoundSpec(const SimpleSoundSpec &ss,
		std::ostream &os)
{
	os<<serializeString(ss.name);
	writeF1000(os, ss.gain);
}
static void deSerializeSimpleSoundSpec(SimpleSoundSpec &ss, std::istream &is)
{
	ss.name = deSerializeString(is);
	ss.gain = readF1000(is);
}

void TextureSettings::readSettings()
{
	connected_glass                = g_settings->getBool("connected_glass");
	opaque_water                   = g_settings->getBool("opaque_water");
	bool enable_shaders            = g_settings->getBool("enable_shaders");
	bool enable_bumpmapping        = g_settings->getBool("enable_bumpmapping");
	bool enable_parallax_occlusion = g_settings->getBool("enable_parallax_occlusion");
	enable_mesh_cache              = g_settings->getBool("enable_mesh_cache");
	enable_minimap                 = g_settings->getBool("enable_minimap");
	std::string leaves_style_str   = g_settings->get("leaves_style");

	use_normal_texture = enable_shaders &&
		(enable_bumpmapping || enable_parallax_occlusion);
	if (leaves_style_str == "fancy") {
		leaves_style = LEAVES_FANCY;
	} else if (leaves_style_str == "simple") {
		leaves_style = LEAVES_SIMPLE;
	} else {
		leaves_style = LEAVES_OPAQUE;
	}
}

/*
	ContentFeatures
*/

ContentFeatures::ContentFeatures()
{
	reset();
}

ContentFeatures::~ContentFeatures()
{
}

void ContentFeatures::reset()
{
	/*
		Cached stuff
	*/
#ifndef SERVER
	solidness = 2;
	visual_solidness = 0;
	backface_culling = true;

#endif
	has_on_construct = false;
	has_on_destruct = false;
	has_after_destruct = false;
	/*
		Actual data

		NOTE: Most of this is always overridden by the default values given
		      in builtin.lua
	*/
	name = "";
	groups.clear();
	// Unknown nodes can be dug
	groups["dig_immediate"] = 2;
	drawtype = NDT_NORMAL;
	mesh = "";
#ifndef SERVER
	for(u32 i = 0; i < 24; i++)
		mesh_ptr[i] = NULL;
	minimap_color = video::SColor(0, 0, 0, 0);
#endif
	visual_scale = 1.0;
	for(u32 i = 0; i < 6; i++)
		tiledef[i] = TileDef();
	for(u16 j = 0; j < CF_SPECIAL_COUNT; j++)
		tiledef_special[j] = TileDef();
	alpha = 255;
	post_effect_color = video::SColor(0, 0, 0, 0);
	param_type = CPT_NONE;
	param_type_2 = CPT2_NONE;
	is_ground_content = false;
	light_propagates = false;
	sunlight_propagates = false;
	walkable = true;
	pointable = true;
	diggable = true;
	climbable = false;
	buildable_to = false;
	floodable = false;
	rightclickable = true;
	leveled = 0;
	liquid_type = LIQUID_NONE;
	liquid_alternative_flowing = "";
	liquid_alternative_source = "";
	liquid_viscosity = 0;
	liquid_renewable = true;
	liquid_range = LIQUID_LEVEL_MAX+1;
	drowning = 0;
	light_source = 0;
	damage_per_second = 0;
	node_box = NodeBox();
	selection_box = NodeBox();
	collision_box = NodeBox();
	waving = 0;
	legacy_facedir_simple = false;
	legacy_wallmounted = false;
	sound_footstep = SimpleSoundSpec();
	sound_dig = SimpleSoundSpec("__group");
	sound_dug = SimpleSoundSpec();
	connects_to.clear();
	connects_to_ids.clear();
	connect_sides = 0;
}

void ContentFeatures::serialize(std::ostream &os, u16 protocol_version) const
{
	if(protocol_version < 24){
		serializeOld(os, protocol_version);
		return;
	}

	writeU8(os, protocol_version < 27 ? 7 : 8);

	os<<serializeString(name);
	writeU16(os, groups.size());
	for(ItemGroupList::const_iterator
			i = groups.begin(); i != groups.end(); ++i){
		os<<serializeString(i->first);
		writeS16(os, i->second);
	}
	writeU8(os, drawtype);
	writeF1000(os, visual_scale);
	writeU8(os, 6);
	for(u32 i = 0; i < 6; i++)
		tiledef[i].serialize(os, protocol_version);
	writeU8(os, CF_SPECIAL_COUNT);
	for(u32 i = 0; i < CF_SPECIAL_COUNT; i++){
		tiledef_special[i].serialize(os, protocol_version);
	}
	writeU8(os, alpha);
	writeU8(os, post_effect_color.getAlpha());
	writeU8(os, post_effect_color.getRed());
	writeU8(os, post_effect_color.getGreen());
	writeU8(os, post_effect_color.getBlue());
	writeU8(os, param_type);
	if ((protocol_version < 28) && (param_type_2 == CPT2_MESHOPTIONS))
		writeU8(os, CPT2_NONE);
	else
		writeU8(os, param_type_2);
	writeU8(os, is_ground_content);
	writeU8(os, light_propagates);
	writeU8(os, sunlight_propagates);
	writeU8(os, walkable);
	writeU8(os, pointable);
	writeU8(os, diggable);
	writeU8(os, climbable);
	writeU8(os, buildable_to);
	os<<serializeString(""); // legacy: used to be metadata_name
	writeU8(os, liquid_type);
	os<<serializeString(liquid_alternative_flowing);
	os<<serializeString(liquid_alternative_source);
	writeU8(os, liquid_viscosity);
	writeU8(os, liquid_renewable);
	writeU8(os, light_source);
	writeU32(os, damage_per_second);
	node_box.serialize(os, protocol_version);
	selection_box.serialize(os, protocol_version);
	writeU8(os, legacy_facedir_simple);
	writeU8(os, legacy_wallmounted);
	serializeSimpleSoundSpec(sound_footstep, os);
	serializeSimpleSoundSpec(sound_dig, os);
	serializeSimpleSoundSpec(sound_dug, os);
	writeU8(os, rightclickable);
	writeU8(os, drowning);
	writeU8(os, leveled);
	writeU8(os, liquid_range);
	writeU8(os, waving);
	// Stuff below should be moved to correct place in a version that otherwise changes
	// the protocol version
	os<<serializeString(mesh);
	collision_box.serialize(os, protocol_version);
	writeU8(os, floodable);
	writeU16(os, connects_to_ids.size());
	for (std::set<content_t>::const_iterator i = connects_to_ids.begin();
			i != connects_to_ids.end(); ++i)
		writeU16(os, *i);
	writeU8(os, connect_sides);
}

void ContentFeatures::deSerialize(std::istream &is)
{
	int version = readU8(is);
	if (version < 7) {
		deSerializeOld(is, version);
		return;
	} else if (version > 8) {
		throw SerializationError("unsupported ContentFeatures version");
	}

	name = deSerializeString(is);
	groups.clear();
	u32 groups_size = readU16(is);
	for(u32 i = 0; i < groups_size; i++){
		std::string name = deSerializeString(is);
		int value = readS16(is);
		groups[name] = value;
	}
	drawtype = (enum NodeDrawType)readU8(is);

	visual_scale = readF1000(is);
	if(readU8(is) != 6)
		throw SerializationError("unsupported tile count");
	for(u32 i = 0; i < 6; i++)
		tiledef[i].deSerialize(is, version, drawtype);
	if(readU8(is) != CF_SPECIAL_COUNT)
		throw SerializationError("unsupported CF_SPECIAL_COUNT");
	for(u32 i = 0; i < CF_SPECIAL_COUNT; i++)
		tiledef_special[i].deSerialize(is, version, drawtype);
	alpha = readU8(is);
	post_effect_color.setAlpha(readU8(is));
	post_effect_color.setRed(readU8(is));
	post_effect_color.setGreen(readU8(is));
	post_effect_color.setBlue(readU8(is));
	param_type = (enum ContentParamType)readU8(is);
	param_type_2 = (enum ContentParamType2)readU8(is);
	is_ground_content = readU8(is);
	light_propagates = readU8(is);
	sunlight_propagates = readU8(is);
	walkable = readU8(is);
	pointable = readU8(is);
	diggable = readU8(is);
	climbable = readU8(is);
	buildable_to = readU8(is);
	deSerializeString(is); // legacy: used to be metadata_name
	liquid_type = (enum LiquidType)readU8(is);
	liquid_alternative_flowing = deSerializeString(is);
	liquid_alternative_source = deSerializeString(is);
	liquid_viscosity = readU8(is);
	liquid_renewable = readU8(is);
	light_source = readU8(is);
	light_source = MYMIN(light_source, LIGHT_MAX);
	damage_per_second = readU32(is);
	node_box.deSerialize(is);
	selection_box.deSerialize(is);
	legacy_facedir_simple = readU8(is);
	legacy_wallmounted = readU8(is);
	deSerializeSimpleSoundSpec(sound_footstep, is);
	deSerializeSimpleSoundSpec(sound_dig, is);
	deSerializeSimpleSoundSpec(sound_dug, is);
	rightclickable = readU8(is);
	drowning = readU8(is);
	leveled = readU8(is);
	liquid_range = readU8(is);
	waving = readU8(is);
	// If you add anything here, insert it primarily inside the try-catch
	// block to not need to increase the version.
	try{
		// Stuff below should be moved to correct place in a version that
		// otherwise changes the protocol version
	mesh = deSerializeString(is);
	collision_box.deSerialize(is);
	floodable = readU8(is);
	u16 connects_to_size = readU16(is);
	connects_to_ids.clear();
	for (u16 i = 0; i < connects_to_size; i++)
		connects_to_ids.insert(readU16(is));
	connect_sides = readU8(is);
	}catch(SerializationError &e) {};
}

#ifndef SERVER
void ContentFeatures::fillTileAttribs(ITextureSource *tsrc, TileSpec *tile,
		TileDef *tiledef, u32 shader_id, bool use_normal_texture,
		bool backface_culling, u8 alpha, u8 material_type)
{
	tile->shader_id     = shader_id;
	tile->texture       = tsrc->getTextureForMesh(tiledef->name, &tile->texture_id);
	tile->alpha         = alpha;
	tile->material_type = material_type;

	// Normal texture and shader flags texture
	if (use_normal_texture) {
		tile->normal_texture = tsrc->getNormalTexture(tiledef->name);
	}
	tile->flags_texture = tsrc->getShaderFlagsTexture(tile->normal_texture ? true : false);

	// Material flags
	tile->material_flags = 0;
	if (backface_culling)
		tile->material_flags |= MATERIAL_FLAG_BACKFACE_CULLING;
	if (tiledef->animation.type == TAT_VERTICAL_FRAMES)
		tile->material_flags |= MATERIAL_FLAG_ANIMATION_VERTICAL_FRAMES;
	if (tiledef->tileable_horizontal)
		tile->material_flags |= MATERIAL_FLAG_TILEABLE_HORIZONTAL;
	if (tiledef->tileable_vertical)
		tile->material_flags |= MATERIAL_FLAG_TILEABLE_VERTICAL;

	// Animation parameters
	int frame_count = 1;
	if (tile->material_flags & MATERIAL_FLAG_ANIMATION_VERTICAL_FRAMES) {
		// Get texture size to determine frame count by aspect ratio
		v2u32 size = tile->texture->getOriginalSize();
		int frame_height = (float)size.X /
				(float)tiledef->animation.aspect_w *
				(float)tiledef->animation.aspect_h;
		frame_count = size.Y / frame_height;
		int frame_length_ms = 1000.0 * tiledef->animation.length / frame_count;
		tile->animation_frame_count = frame_count;
		tile->animation_frame_length_ms = frame_length_ms;
	}

	if (frame_count == 1) {
		tile->material_flags &= ~MATERIAL_FLAG_ANIMATION_VERTICAL_FRAMES;
	} else {
		std::ostringstream os(std::ios::binary);
		tile->frames.resize(frame_count);

		for (int i = 0; i < frame_count; i++) {

			FrameSpec frame;

			os.str("");
			os << tiledef->name << "^[verticalframe:"
				<< frame_count << ":" << i;

			frame.texture = tsrc->getTextureForMesh(os.str(), &frame.texture_id);
			if (tile->normal_texture)
				frame.normal_texture = tsrc->getNormalTexture(os.str());
			frame.flags_texture = tile->flags_texture;
			tile->frames[i] = frame;
		}
	}
}
#endif

#ifndef SERVER
void ContentFeatures::updateTextures(ITextureSource *tsrc, IShaderSource *shdsrc,
	scene::ISceneManager *smgr, scene::IMeshManipulator *meshmanip,
	IGameDef *gamedef, const TextureSettings &tsettings)
{
	// minimap pixel color - the average color of a texture
	if (tsettings.enable_minimap && tiledef[0].name != "")
		minimap_color = tsrc->getTextureAverageColor(tiledef[0].name);

	// Figure out the actual tiles to use
	TileDef tdef[6];
	for (u32 j = 0; j < 6; j++) {
		tdef[j] = tiledef[j];
		if (tdef[j].name == "")
			tdef[j].name = "unknown_node.png";
	}

	bool is_liquid = false;
	bool is_water_surface = false;

	u8 material_type = (alpha == 255) ?
		TILE_MATERIAL_BASIC : TILE_MATERIAL_ALPHA;

	switch (drawtype) {
	default:
	case NDT_NORMAL:
		solidness = 2;
		break;
	case NDT_AIRLIKE:
		solidness = 0;
		break;
	case NDT_LIQUID:
		assert(liquid_type == LIQUID_SOURCE);
		if (tsettings.opaque_water)
			alpha = 255;
		solidness = 1;
		is_liquid = true;
		break;
	case NDT_FLOWINGLIQUID:
		assert(liquid_type == LIQUID_FLOWING);
		solidness = 0;
		if (tsettings.opaque_water)
			alpha = 255;
		is_liquid = true;
		break;
	case NDT_GLASSLIKE:
		solidness = 0;
		visual_solidness = 1;
		break;
	case NDT_GLASSLIKE_FRAMED:
		solidness = 0;
		visual_solidness = 1;
		break;
	case NDT_GLASSLIKE_FRAMED_OPTIONAL:
		solidness = 0;
		visual_solidness = 1;
		drawtype = tsettings.connected_glass ? NDT_GLASSLIKE_FRAMED : NDT_GLASSLIKE;
		break;
	case NDT_ALLFACES:
		solidness = 0;
		visual_solidness = 1;
		break;
	case NDT_ALLFACES_OPTIONAL:
		if (tsettings.leaves_style == LEAVES_FANCY) {
			drawtype = NDT_ALLFACES;
			solidness = 0;
			visual_solidness = 1;
		} else if (tsettings.leaves_style == LEAVES_SIMPLE) {
			for (u32 j = 0; j < 6; j++) {
				if (tiledef_special[j].name != "")
					tdef[j].name = tiledef_special[j].name;
			}
			drawtype = NDT_GLASSLIKE;
			solidness = 0;
			visual_solidness = 1;
		} else {
			drawtype = NDT_NORMAL;
			solidness = 2;
			for (u32 i = 0; i < 6; i++)
				tdef[i].name += std::string("^[noalpha");
		}
		if (waving == 1)
			material_type = TILE_MATERIAL_WAVING_LEAVES;
		break;
	case NDT_PLANTLIKE:
		solidness = 0;
		if (waving == 1)
			material_type = TILE_MATERIAL_WAVING_PLANTS;
		break;
	case NDT_FIRELIKE:
		solidness = 0;
		break;
	case NDT_MESH:
		solidness = 0;
		break;
	case NDT_TORCHLIKE:
	case NDT_SIGNLIKE:
	case NDT_FENCELIKE:
	case NDT_RAILLIKE:
	case NDT_NODEBOX:
		solidness = 0;
		break;
	}

	if (is_liquid) {
		material_type = (alpha == 255) ?
			TILE_MATERIAL_LIQUID_OPAQUE : TILE_MATERIAL_LIQUID_TRANSPARENT;
		if (name == "default:water_source")
			is_water_surface = true;
	}

	u32 tile_shader[6];
	for (u16 j = 0; j < 6; j++) {
		tile_shader[j] = shdsrc->getShader("nodes_shader",
			material_type, drawtype);
	}

	if (is_water_surface) {
		tile_shader[0] = shdsrc->getShader("water_surface_shader",
			material_type, drawtype);
	}

	// Tiles (fill in f->tiles[])
	for (u16 j = 0; j < 6; j++) {
		fillTileAttribs(tsrc, &tiles[j], &tdef[j], tile_shader[j],
			tsettings.use_normal_texture,
			tiledef[j].backface_culling, alpha, material_type);
	}

	// Special tiles (fill in f->special_tiles[])
	for (u16 j = 0; j < CF_SPECIAL_COUNT; j++) {
		fillTileAttribs(tsrc, &special_tiles[j], &tiledef_special[j],
			tile_shader[j], tsettings.use_normal_texture,
			tiledef_special[j].backface_culling, alpha, material_type);
	}

	if ((drawtype == NDT_MESH) && (mesh != "")) {
		// Meshnode drawtype
		// Read the mesh and apply scale
		mesh_ptr[0] = gamedef->getMesh(mesh);
		if (mesh_ptr[0]){
			v3f scale = v3f(1.0, 1.0, 1.0) * BS * visual_scale;
			scaleMesh(mesh_ptr[0], scale);
			recalculateBoundingBox(mesh_ptr[0]);
			meshmanip->recalculateNormals(mesh_ptr[0], true, false);
		}
	} else if ((drawtype == NDT_NODEBOX) &&
			((node_box.type == NODEBOX_REGULAR) ||
			(node_box.type == NODEBOX_FIXED)) &&
			(!node_box.fixed.empty())) {
		//Convert regular nodebox nodes to meshnodes
		//Change the drawtype and apply scale
		drawtype = NDT_MESH;
		mesh_ptr[0] = convertNodeboxesToMesh(node_box.fixed);
		v3f scale = v3f(1.0, 1.0, 1.0) * visual_scale;
		scaleMesh(mesh_ptr[0], scale);
		recalculateBoundingBox(mesh_ptr[0]);
		meshmanip->recalculateNormals(mesh_ptr[0], true, false);
	}

	//Cache 6dfacedir and wallmounted rotated clones of meshes
	if (tsettings.enable_mesh_cache && mesh_ptr[0] && (param_type_2 == CPT2_FACEDIR)) {
		for (u16 j = 1; j < 24; j++) {
			mesh_ptr[j] = cloneMesh(mesh_ptr[0]);
			rotateMeshBy6dFacedir(mesh_ptr[j], j);
			recalculateBoundingBox(mesh_ptr[j]);
			meshmanip->recalculateNormals(mesh_ptr[j], true, false);
		}
	} else if (tsettings.enable_mesh_cache && mesh_ptr[0] && (param_type_2 == CPT2_WALLMOUNTED)) {
		static const u8 wm_to_6d[6] = {20, 0, 16+1, 12+3, 8, 4+2};
		for (u16 j = 1; j < 6; j++) {
			mesh_ptr[j] = cloneMesh(mesh_ptr[0]);
			rotateMeshBy6dFacedir(mesh_ptr[j], wm_to_6d[j]);
			recalculateBoundingBox(mesh_ptr[j]);
			meshmanip->recalculateNormals(mesh_ptr[j], true, false);
		}
		rotateMeshBy6dFacedir(mesh_ptr[0], wm_to_6d[0]);
		recalculateBoundingBox(mesh_ptr[0]);
		meshmanip->recalculateNormals(mesh_ptr[0], true, false);
	}
}
#endif

/*
	CNodeDefManager
*/

class CNodeDefManager: public IWritableNodeDefManager {
public:
	CNodeDefManager();
	virtual ~CNodeDefManager();
	void clear();
	virtual IWritableNodeDefManager *clone();
	inline virtual const ContentFeatures& get(content_t c) const;
	inline virtual const ContentFeatures& get(const MapNode &n) const;
	virtual bool getId(const std::string &name, content_t &result) const;
	virtual content_t getId(const std::string &name) const;
	virtual bool getIds(const std::string &name, std::set<content_t> &result) const;
	virtual const ContentFeatures& get(const std::string &name) const;
	content_t allocateId();
	virtual content_t set(const std::string &name, const ContentFeatures &def);
	virtual content_t allocateDummy(const std::string &name);
	virtual void removeNode(const std::string &name);
	virtual void updateAliases(IItemDefManager *idef);
	virtual void applyTextureOverrides(const std::string &override_filepath);
	virtual void updateTextures(IGameDef *gamedef,
		void (*progress_cbk)(void *progress_args, u32 progress, u32 max_progress),
		void *progress_cbk_args);
	void serialize(std::ostream &os, u16 protocol_version) const;
	void deSerialize(std::istream &is);

	inline virtual bool getNodeRegistrationStatus() const;
	inline virtual void setNodeRegistrationStatus(bool completed);

	virtual void pendNodeResolve(NodeResolver *nr);
	virtual bool cancelNodeResolveCallback(NodeResolver *nr);
	virtual void runNodeResolveCallbacks();
	virtual void resetNodeResolveState();
	virtual void mapNodeboxConnections();
	virtual bool nodeboxConnects(MapNode from, MapNode to, u8 connect_face);

private:
	void addNameIdMapping(content_t i, std::string name);

	// Features indexed by id
	std::vector<ContentFeatures> m_content_features;

	// A mapping for fast converting back and forth between names and ids
	NameIdMapping m_name_id_mapping;

	// Like m_name_id_mapping, but only from names to ids, and includes
	// item aliases too. Updated by updateAliases()
	// Note: Not serialized.

	UNORDERED_MAP<std::string, content_t> m_name_id_mapping_with_aliases;

	// A mapping from groups to a list of content_ts (and their levels)
	// that belong to it.  Necessary for a direct lookup in getIds().
	// Note: Not serialized.
	UNORDERED_MAP<std::string, GroupItems> m_group_to_items;

	// Next possibly free id
	content_t m_next_id;

	// NodeResolvers to callback once node registration has ended
	std::vector<NodeResolver *> m_pending_resolve_callbacks;

	// True when all nodes have been registered
	bool m_node_registration_complete;
};


CNodeDefManager::CNodeDefManager()
{
	clear();
}


CNodeDefManager::~CNodeDefManager()
{
#ifndef SERVER
	for (u32 i = 0; i < m_content_features.size(); i++) {
		ContentFeatures *f = &m_content_features[i];
		for (u32 j = 0; j < 24; j++) {
			if (f->mesh_ptr[j])
				f->mesh_ptr[j]->drop();
		}
	}
#endif
}


void CNodeDefManager::clear()
{
	m_content_features.clear();
	m_name_id_mapping.clear();
	m_name_id_mapping_with_aliases.clear();
	m_group_to_items.clear();
	m_next_id = 0;

	resetNodeResolveState();

	u32 initial_length = 0;
	initial_length = MYMAX(initial_length, CONTENT_UNKNOWN + 1);
	initial_length = MYMAX(initial_length, CONTENT_AIR + 1);
	initial_length = MYMAX(initial_length, CONTENT_IGNORE + 1);
	m_content_features.resize(initial_length);

	// Set CONTENT_UNKNOWN
	{
		ContentFeatures f;
		f.name = "unknown";
		// Insert directly into containers
		content_t c = CONTENT_UNKNOWN;
		m_content_features[c] = f;
		addNameIdMapping(c, f.name);
	}

	// Set CONTENT_AIR
	{
		ContentFeatures f;
		f.name                = "air";
		f.drawtype            = NDT_AIRLIKE;
		f.param_type          = CPT_LIGHT;
		f.light_propagates    = true;
		f.sunlight_propagates = true;
		f.walkable            = false;
		f.pointable           = false;
		f.diggable            = false;
		f.buildable_to        = true;
		f.floodable           = true;
		f.is_ground_content   = true;
		// Insert directly into containers
		content_t c = CONTENT_AIR;
		m_content_features[c] = f;
		addNameIdMapping(c, f.name);
	}

	// Set CONTENT_IGNORE
	{
		ContentFeatures f;
		f.name                = "ignore";
		f.drawtype            = NDT_AIRLIKE;
		f.param_type          = CPT_NONE;
		f.light_propagates    = false;
		f.sunlight_propagates = false;
		f.walkable            = false;
		f.pointable           = false;
		f.diggable            = false;
		f.buildable_to        = true; // A way to remove accidental CONTENT_IGNOREs
		f.is_ground_content   = true;
		// Insert directly into containers
		content_t c = CONTENT_IGNORE;
		m_content_features[c] = f;
		addNameIdMapping(c, f.name);
	}
}


IWritableNodeDefManager *CNodeDefManager::clone()
{
	CNodeDefManager *mgr = new CNodeDefManager();
	*mgr = *this;
	return mgr;
}


inline const ContentFeatures& CNodeDefManager::get(content_t c) const
{
	return c < m_content_features.size()
			? m_content_features[c] : m_content_features[CONTENT_UNKNOWN];
}


inline const ContentFeatures& CNodeDefManager::get(const MapNode &n) const
{
	return get(n.getContent());
}


bool CNodeDefManager::getId(const std::string &name, content_t &result) const
{
	UNORDERED_MAP<std::string, content_t>::const_iterator
		i = m_name_id_mapping_with_aliases.find(name);
	if(i == m_name_id_mapping_with_aliases.end())
		return false;
	result = i->second;
	return true;
}


content_t CNodeDefManager::getId(const std::string &name) const
{
	content_t id = CONTENT_IGNORE;
	getId(name, id);
	return id;
}


bool CNodeDefManager::getIds(const std::string &name,
		std::set<content_t> &result) const
{
	//TimeTaker t("getIds", NULL, PRECISION_MICRO);
	if (name.substr(0,6) != "group:") {
		content_t id = CONTENT_IGNORE;
		bool exists = getId(name, id);
		if (exists)
			result.insert(id);
		return exists;
	}
	std::string group = name.substr(6);

	UNORDERED_MAP<std::string, GroupItems>::const_iterator
		i = m_group_to_items.find(group);
	if (i == m_group_to_items.end())
		return true;

	const GroupItems &items = i->second;
	for (GroupItems::const_iterator j = items.begin();
		j != items.end(); ++j) {
		if ((*j).second != 0)
			result.insert((*j).first);
	}
	//printf("getIds: %dus\n", t.stop());
	return true;
}


const ContentFeatures& CNodeDefManager::get(const std::string &name) const
{
	content_t id = CONTENT_UNKNOWN;
	getId(name, id);
	return get(id);
}


// returns CONTENT_IGNORE if no free ID found
content_t CNodeDefManager::allocateId()
{
	for (content_t id = m_next_id;
			id >= m_next_id; // overflow?
			++id) {
		while (id >= m_content_features.size()) {
			m_content_features.push_back(ContentFeatures());
		}
		const ContentFeatures &f = m_content_features[id];
		if (f.name == "") {
			m_next_id = id + 1;
			return id;
		}
	}
	// If we arrive here, an overflow occurred in id.
	// That means no ID was found
	return CONTENT_IGNORE;
}


// IWritableNodeDefManager
content_t CNodeDefManager::set(const std::string &name, const ContentFeatures &def)
{
	// Pre-conditions
	assert(name != "");
	assert(name == def.name);

	// Don't allow redefining ignore (but allow air and unknown)
	if (name == "ignore") {
		warningstream << "NodeDefManager: Ignoring "
			"CONTENT_IGNORE redefinition"<<std::endl;
		return CONTENT_IGNORE;
	}

	content_t id = CONTENT_IGNORE;
	if (!m_name_id_mapping.getId(name, id)) { // ignore aliases
		// Get new id
		id = allocateId();
		if (id == CONTENT_IGNORE) {
			warningstream << "NodeDefManager: Absolute "
				"limit reached" << std::endl;
			return CONTENT_IGNORE;
		}
		assert(id != CONTENT_IGNORE);
		addNameIdMapping(id, name);
	}
	m_content_features[id] = def;
	verbosestream << "NodeDefManager: registering content id \"" << id
		<< "\": name=\"" << def.name << "\""<<std::endl;

	// Add this content to the list of all groups it belongs to
	// FIXME: This should remove a node from groups it no longer
	// belongs to when a node is re-registered
	for (ItemGroupList::const_iterator i = def.groups.begin();
		i != def.groups.end(); ++i) {
		std::string group_name = i->first;

		UNORDERED_MAP<std::string, GroupItems>::iterator
			j = m_group_to_items.find(group_name);
		if (j == m_group_to_items.end()) {
			m_group_to_items[group_name].push_back(
				std::make_pair(id, i->second));
		} else {
			GroupItems &items = j->second;
			items.push_back(std::make_pair(id, i->second));
		}
	}
	return id;
}


content_t CNodeDefManager::allocateDummy(const std::string &name)
{
	assert(name != "");	// Pre-condition
	ContentFeatures f;
	f.name = name;
	return set(name, f);
}


void CNodeDefManager::removeNode(const std::string &name)
{
	// Pre-condition
	assert(name != "");

	// Erase name from name ID mapping
	content_t id = CONTENT_IGNORE;
	if (m_name_id_mapping.getId(name, id)) {
		m_name_id_mapping.eraseName(name);
		m_name_id_mapping_with_aliases.erase(name);
	}

	// Erase node content from all groups it belongs to
	for (UNORDERED_MAP<std::string, GroupItems>::iterator iter_groups =
			m_group_to_items.begin();
			iter_groups != m_group_to_items.end();) {
		GroupItems &items = iter_groups->second;
		for (GroupItems::iterator iter_groupitems = items.begin();
				iter_groupitems != items.end();) {
			if (iter_groupitems->first == id)
				items.erase(iter_groupitems++);
			else
				iter_groupitems++;
		}

		// Check if group is empty
		if (items.size() == 0)
			m_group_to_items.erase(iter_groups++);
		else
			iter_groups++;
	}
}


void CNodeDefManager::updateAliases(IItemDefManager *idef)
{
	std::set<std::string> all = idef->getAll();
	m_name_id_mapping_with_aliases.clear();
	for (std::set<std::string>::iterator
			i = all.begin(); i != all.end(); ++i) {
		std::string name = *i;
		std::string convert_to = idef->getAlias(name);
		content_t id;
		if (m_name_id_mapping.getId(convert_to, id)) {
			m_name_id_mapping_with_aliases.insert(
				std::make_pair(name, id));
		}
	}
}

void CNodeDefManager::applyTextureOverrides(const std::string &override_filepath)
{
	infostream << "CNodeDefManager::applyTextureOverrides(): Applying "
		"overrides to textures from " << override_filepath << std::endl;

	std::ifstream infile(override_filepath.c_str());
	std::string line;
	int line_c = 0;
	while (std::getline(infile, line)) {
		line_c++;
		if (trim(line) == "")
			continue;
		std::vector<std::string> splitted = str_split(line, ' ');
		if (splitted.size() != 3) {
			errorstream << override_filepath
				<< ":" << line_c << " Could not apply texture override \""
				<< line << "\": Syntax error" << std::endl;
			continue;
		}

		content_t id;
		if (!getId(splitted[0], id))
			continue; // Ignore unknown node

		ContentFeatures &nodedef = m_content_features[id];

		if (splitted[1] == "top")
			nodedef.tiledef[0].name = splitted[2];
		else if (splitted[1] == "bottom")
			nodedef.tiledef[1].name = splitted[2];
		else if (splitted[1] == "right")
			nodedef.tiledef[2].name = splitted[2];
		else if (splitted[1] == "left")
			nodedef.tiledef[3].name = splitted[2];
		else if (splitted[1] == "back")
			nodedef.tiledef[4].name = splitted[2];
		else if (splitted[1] == "front")
			nodedef.tiledef[5].name = splitted[2];
		else if (splitted[1] == "all" || splitted[1] == "*")
			for (int i = 0; i < 6; i++)
				nodedef.tiledef[i].name = splitted[2];
		else if (splitted[1] == "sides")
			for (int i = 2; i < 6; i++)
				nodedef.tiledef[i].name = splitted[2];
		else {
			errorstream << override_filepath
				<< ":" << line_c << " Could not apply texture override \""
				<< line << "\": Unknown node side \""
				<< splitted[1] << "\"" << std::endl;
			continue;
		}
	}
}

void CNodeDefManager::updateTextures(IGameDef *gamedef,
	void (*progress_callback)(void *progress_args, u32 progress, u32 max_progress),
	void *progress_callback_args)
{
#ifndef SERVER
	infostream << "CNodeDefManager::updateTextures(): Updating "
		"textures in node definitions" << std::endl;
	ITextureSource *tsrc = gamedef->tsrc();
	IShaderSource *shdsrc = gamedef->getShaderSource();
	scene::ISceneManager* smgr = gamedef->getSceneManager();
	scene::IMeshManipulator* meshmanip = smgr->getMeshManipulator();
	TextureSettings tsettings;
	tsettings.readSettings();

	u32 size = m_content_features.size();

	for (u32 i = 0; i < size; i++) {
		m_content_features[i].updateTextures(tsrc, shdsrc, smgr, meshmanip, gamedef, tsettings);
		progress_callback(progress_callback_args, i, size);
	}
#endif
}

void CNodeDefManager::serialize(std::ostream &os, u16 protocol_version) const
{
	writeU8(os, 1); // version
	u16 count = 0;
	std::ostringstream os2(std::ios::binary);
	for (u32 i = 0; i < m_content_features.size(); i++) {
		if (i == CONTENT_IGNORE || i == CONTENT_AIR
				|| i == CONTENT_UNKNOWN)
			continue;
		const ContentFeatures *f = &m_content_features[i];
		if (f->name == "")
			continue;
		writeU16(os2, i);
		// Wrap it in a string to allow different lengths without
		// strict version incompatibilities
		std::ostringstream wrapper_os(std::ios::binary);
		f->serialize(wrapper_os, protocol_version);
		os2<<serializeString(wrapper_os.str());

		// must not overflow
		u16 next = count + 1;
		FATAL_ERROR_IF(next < count, "Overflow");
		count++;
	}
	writeU16(os, count);
	os << serializeLongString(os2.str());
}


void CNodeDefManager::deSerialize(std::istream &is)
{
	clear();
	int version = readU8(is);
	if (version != 1)
		throw SerializationError("unsupported NodeDefinitionManager version");
	u16 count = readU16(is);
	std::istringstream is2(deSerializeLongString(is), std::ios::binary);
	ContentFeatures f;
	for (u16 n = 0; n < count; n++) {
		u16 i = readU16(is2);

		// Read it from the string wrapper
		std::string wrapper = deSerializeString(is2);
		std::istringstream wrapper_is(wrapper, std::ios::binary);
		f.deSerialize(wrapper_is);

		// Check error conditions
		if (i == CONTENT_IGNORE || i == CONTENT_AIR || i == CONTENT_UNKNOWN) {
			warningstream << "NodeDefManager::deSerialize(): "
				"not changing builtin node " << i << std::endl;
			continue;
		}
		if (f.name == "") {
			warningstream << "NodeDefManager::deSerialize(): "
				"received empty name" << std::endl;
			continue;
		}

		// Ignore aliases
		u16 existing_id;
		if (m_name_id_mapping.getId(f.name, existing_id) && i != existing_id) {
			warningstream << "NodeDefManager::deSerialize(): "
				"already defined with different ID: " << f.name << std::endl;
			continue;
		}

		// All is ok, add node definition with the requested ID
		if (i >= m_content_features.size())
			m_content_features.resize((u32)(i) + 1);
		m_content_features[i] = f;
		addNameIdMapping(i, f.name);
		verbosestream << "deserialized " << f.name << std::endl;
	}
}


void CNodeDefManager::addNameIdMapping(content_t i, std::string name)
{
	m_name_id_mapping.set(i, name);
	m_name_id_mapping_with_aliases.insert(std::make_pair(name, i));
}


IWritableNodeDefManager *createNodeDefManager()
{
	return new CNodeDefManager();
}


//// Serialization of old ContentFeatures formats
void ContentFeatures::serializeOld(std::ostream &os, u16 protocol_version) const
{
	if (protocol_version == 13)
	{
		writeU8(os, 5); // version
		os<<serializeString(name);
		writeU16(os, groups.size());
		for (ItemGroupList::const_iterator
				i = groups.begin(); i != groups.end(); ++i) {
			os<<serializeString(i->first);
			writeS16(os, i->second);
		}
		writeU8(os, drawtype);
		writeF1000(os, visual_scale);
		writeU8(os, 6);
		for (u32 i = 0; i < 6; i++)
			tiledef[i].serialize(os, protocol_version);
		//CF_SPECIAL_COUNT = 2 before cf ver. 7 and protocol ver. 24
		writeU8(os, 2);
		for (u32 i = 0; i < 2; i++)
			tiledef_special[i].serialize(os, protocol_version);
		writeU8(os, alpha);
		writeU8(os, post_effect_color.getAlpha());
		writeU8(os, post_effect_color.getRed());
		writeU8(os, post_effect_color.getGreen());
		writeU8(os, post_effect_color.getBlue());
		writeU8(os, param_type);
		writeU8(os, param_type_2);
		writeU8(os, is_ground_content);
		writeU8(os, light_propagates);
		writeU8(os, sunlight_propagates);
		writeU8(os, walkable);
		writeU8(os, pointable);
		writeU8(os, diggable);
		writeU8(os, climbable);
		writeU8(os, buildable_to);
		os<<serializeString(""); // legacy: used to be metadata_name
		writeU8(os, liquid_type);
		os<<serializeString(liquid_alternative_flowing);
		os<<serializeString(liquid_alternative_source);
		writeU8(os, liquid_viscosity);
		writeU8(os, light_source);
		writeU32(os, damage_per_second);
		node_box.serialize(os, protocol_version);
		selection_box.serialize(os, protocol_version);
		writeU8(os, legacy_facedir_simple);
		writeU8(os, legacy_wallmounted);
		serializeSimpleSoundSpec(sound_footstep, os);
		serializeSimpleSoundSpec(sound_dig, os);
		serializeSimpleSoundSpec(sound_dug, os);
	}
	else if (protocol_version > 13 && protocol_version < 24) {
		writeU8(os, 6); // version
		os<<serializeString(name);
		writeU16(os, groups.size());
		for (ItemGroupList::const_iterator
			i = groups.begin(); i != groups.end(); ++i) {
				os<<serializeString(i->first);
				writeS16(os, i->second);
		}
		writeU8(os, drawtype);
		writeF1000(os, visual_scale);
		writeU8(os, 6);
		for (u32 i = 0; i < 6; i++)
			tiledef[i].serialize(os, protocol_version);
		//CF_SPECIAL_COUNT = 2 before cf ver. 7 and protocol ver. 24
		writeU8(os, 2);
		for (u32 i = 0; i < 2; i++)
			tiledef_special[i].serialize(os, protocol_version);
		writeU8(os, alpha);
		writeU8(os, post_effect_color.getAlpha());
		writeU8(os, post_effect_color.getRed());
		writeU8(os, post_effect_color.getGreen());
		writeU8(os, post_effect_color.getBlue());
		writeU8(os, param_type);
		writeU8(os, param_type_2);
		writeU8(os, is_ground_content);
		writeU8(os, light_propagates);
		writeU8(os, sunlight_propagates);
		writeU8(os, walkable);
		writeU8(os, pointable);
		writeU8(os, diggable);
		writeU8(os, climbable);
		writeU8(os, buildable_to);
		os<<serializeString(""); // legacy: used to be metadata_name
		writeU8(os, liquid_type);
		os<<serializeString(liquid_alternative_flowing);
		os<<serializeString(liquid_alternative_source);
		writeU8(os, liquid_viscosity);
		writeU8(os, liquid_renewable);
		writeU8(os, light_source);
		writeU32(os, damage_per_second);
		node_box.serialize(os, protocol_version);
		selection_box.serialize(os, protocol_version);
		writeU8(os, legacy_facedir_simple);
		writeU8(os, legacy_wallmounted);
		serializeSimpleSoundSpec(sound_footstep, os);
		serializeSimpleSoundSpec(sound_dig, os);
		serializeSimpleSoundSpec(sound_dug, os);
		writeU8(os, rightclickable);
		writeU8(os, drowning);
		writeU8(os, leveled);
		writeU8(os, liquid_range);
	} else
		throw SerializationError("ContentFeatures::serialize(): "
			"Unsupported version requested");
}

void ContentFeatures::deSerializeOld(std::istream &is, int version)
{
	if (version == 5) // In PROTOCOL_VERSION 13
	{
		name = deSerializeString(is);
		groups.clear();
		u32 groups_size = readU16(is);
		for(u32 i=0; i<groups_size; i++){
			std::string name = deSerializeString(is);
			int value = readS16(is);
			groups[name] = value;
		}
		drawtype = (enum NodeDrawType)readU8(is);

		visual_scale = readF1000(is);
		if (readU8(is) != 6)
			throw SerializationError("unsupported tile count");
		for (u32 i = 0; i < 6; i++)
			tiledef[i].deSerialize(is, version, drawtype);
		if (readU8(is) != CF_SPECIAL_COUNT)
			throw SerializationError("unsupported CF_SPECIAL_COUNT");
		for (u32 i = 0; i < CF_SPECIAL_COUNT; i++)
			tiledef_special[i].deSerialize(is, version, drawtype);
		alpha = readU8(is);
		post_effect_color.setAlpha(readU8(is));
		post_effect_color.setRed(readU8(is));
		post_effect_color.setGreen(readU8(is));
		post_effect_color.setBlue(readU8(is));
		param_type = (enum ContentParamType)readU8(is);
		param_type_2 = (enum ContentParamType2)readU8(is);
		is_ground_content = readU8(is);
		light_propagates = readU8(is);
		sunlight_propagates = readU8(is);
		walkable = readU8(is);
		pointable = readU8(is);
		diggable = readU8(is);
		climbable = readU8(is);
		buildable_to = readU8(is);
		deSerializeString(is); // legacy: used to be metadata_name
		liquid_type = (enum LiquidType)readU8(is);
		liquid_alternative_flowing = deSerializeString(is);
		liquid_alternative_source = deSerializeString(is);
		liquid_viscosity = readU8(is);
		light_source = readU8(is);
		light_source = MYMIN(light_source, LIGHT_MAX);
		damage_per_second = readU32(is);
		node_box.deSerialize(is);
		selection_box.deSerialize(is);
		legacy_facedir_simple = readU8(is);
		legacy_wallmounted = readU8(is);
		deSerializeSimpleSoundSpec(sound_footstep, is);
		deSerializeSimpleSoundSpec(sound_dig, is);
		deSerializeSimpleSoundSpec(sound_dug, is);
	} else if (version == 6) {
		name = deSerializeString(is);
		groups.clear();
		u32 groups_size = readU16(is);
		for (u32 i = 0; i < groups_size; i++) {
			std::string name = deSerializeString(is);
			int	value = readS16(is);
			groups[name] = value;
		}
		drawtype = (enum NodeDrawType)readU8(is);
		visual_scale = readF1000(is);
		if (readU8(is) != 6)
			throw SerializationError("unsupported tile count");
		for (u32 i = 0; i < 6; i++)
			tiledef[i].deSerialize(is, version, drawtype);
		// CF_SPECIAL_COUNT in version 6 = 2
		if (readU8(is) != 2)
			throw SerializationError("unsupported CF_SPECIAL_COUNT");
		for (u32 i = 0; i < 2; i++)
			tiledef_special[i].deSerialize(is, version, drawtype);
		alpha = readU8(is);
		post_effect_color.setAlpha(readU8(is));
		post_effect_color.setRed(readU8(is));
		post_effect_color.setGreen(readU8(is));
		post_effect_color.setBlue(readU8(is));
		param_type = (enum ContentParamType)readU8(is);
		param_type_2 = (enum ContentParamType2)readU8(is);
		is_ground_content = readU8(is);
		light_propagates = readU8(is);
		sunlight_propagates = readU8(is);
		walkable = readU8(is);
		pointable = readU8(is);
		diggable = readU8(is);
		climbable = readU8(is);
		buildable_to = readU8(is);
		deSerializeString(is); // legacy: used to be metadata_name
		liquid_type = (enum LiquidType)readU8(is);
		liquid_alternative_flowing = deSerializeString(is);
		liquid_alternative_source = deSerializeString(is);
		liquid_viscosity = readU8(is);
		liquid_renewable = readU8(is);
		light_source = readU8(is);
		damage_per_second = readU32(is);
		node_box.deSerialize(is);
		selection_box.deSerialize(is);
		legacy_facedir_simple = readU8(is);
		legacy_wallmounted = readU8(is);
		deSerializeSimpleSoundSpec(sound_footstep, is);
		deSerializeSimpleSoundSpec(sound_dig, is);
		deSerializeSimpleSoundSpec(sound_dug, is);
		rightclickable = readU8(is);
		drowning = readU8(is);
		leveled = readU8(is);
		liquid_range = readU8(is);
	} else {
		throw SerializationError("unsupported ContentFeatures version");
	}
}


inline bool CNodeDefManager::getNodeRegistrationStatus() const
{
	return m_node_registration_complete;
}


inline void CNodeDefManager::setNodeRegistrationStatus(bool completed)
{
	m_node_registration_complete = completed;
}


void CNodeDefManager::pendNodeResolve(NodeResolver *nr)
{
	nr->m_ndef = this;
	if (m_node_registration_complete)
		nr->nodeResolveInternal();
	else
		m_pending_resolve_callbacks.push_back(nr);
}


bool CNodeDefManager::cancelNodeResolveCallback(NodeResolver *nr)
{
	size_t len = m_pending_resolve_callbacks.size();
	for (size_t i = 0; i != len; i++) {
		if (nr != m_pending_resolve_callbacks[i])
			continue;

		len--;
		m_pending_resolve_callbacks[i] = m_pending_resolve_callbacks[len];
		m_pending_resolve_callbacks.resize(len);
		return true;
	}

	return false;
}


void CNodeDefManager::runNodeResolveCallbacks()
{
	for (size_t i = 0; i != m_pending_resolve_callbacks.size(); i++) {
		NodeResolver *nr = m_pending_resolve_callbacks[i];
		nr->nodeResolveInternal();
	}

	m_pending_resolve_callbacks.clear();
}


void CNodeDefManager::resetNodeResolveState()
{
	m_node_registration_complete = false;
	m_pending_resolve_callbacks.clear();
}

void CNodeDefManager::mapNodeboxConnections()
{
	for (u32 i = 0; i < m_content_features.size(); i++) {
		ContentFeatures *f = &m_content_features[i];
		if ((f->drawtype != NDT_NODEBOX) || (f->node_box.type != NODEBOX_CONNECTED))
			continue;
		for (std::vector<std::string>::iterator it = f->connects_to.begin();
				it != f->connects_to.end(); ++it) {
			getIds(*it, f->connects_to_ids);
		}
	}
}

bool CNodeDefManager::nodeboxConnects(MapNode from, MapNode to, u8 connect_face)
{
	const ContentFeatures &f1 = get(from);

	if ((f1.drawtype != NDT_NODEBOX) || (f1.node_box.type != NODEBOX_CONNECTED))
		return false;

	// lookup target in connected set
	if (f1.connects_to_ids.find(to.param0) == f1.connects_to_ids.end())
		return false;

	const ContentFeatures &f2 = get(to);

	if ((f2.drawtype == NDT_NODEBOX) && (f2.node_box.type == NODEBOX_CONNECTED))
		// ignores actually looking if back connection exists
		return (f2.connects_to_ids.find(from.param0) != f2.connects_to_ids.end());

	// does to node declare usable faces?
	if (f2.connect_sides > 0) {
		if ((f2.param_type_2 == CPT2_FACEDIR) && (connect_face >= 4)) {
			static const u8 rot[33 * 4] = {
				0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
				4, 32, 16, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4 - back
				8, 4, 32, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8 - right
				0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
				16, 8, 4, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - front
				0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
				0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
				0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,