minetest/src/mapblock.cpp

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/*
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Minetest
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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.
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*/
#include "mapblock.h"
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#include <sstream>
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#include "map.h"
#include "light.h"
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#include "nodedef.h"
#include "nodemetadata.h"
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#include "gamedef.h"
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#include "log.h"
#include "nameidmapping.h"
#include "content_mapnode.h" // For legacy name-id mapping
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#include "content_nodemeta.h" // For legacy deserialization
#include "serialization.h"
#ifndef SERVER
#include "mapblock_mesh.h"
#endif
#include "util/string.h"
#include "util/serialize.h"
#include "util/basic_macros.h"
static const char *modified_reason_strings[] = {
"initial",
"reallocate",
"setIsUnderground",
"setLightingExpired",
"setGenerated",
"setNode",
"setNodeNoCheck",
"setTimestamp",
"NodeMetaRef::reportMetadataChange",
"clearAllObjects",
"Timestamp expired (step)",
"addActiveObjectRaw",
"removeRemovedObjects/remove",
"removeRemovedObjects/deactivate",
"Stored list cleared in activateObjects due to overflow",
"deactivateFarObjects: Static data moved in",
"deactivateFarObjects: Static data moved out",
"deactivateFarObjects: Static data changed considerably",
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"finishBlockMake: expireDayNightDiff",
"unknown",
};
/*
MapBlock
*/
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MapBlock::MapBlock(Map *parent, v3s16 pos, IGameDef *gamedef, bool dummy):
m_parent(parent),
m_pos(pos),
m_pos_relative(pos * MAP_BLOCKSIZE),
m_gamedef(gamedef)
{
if(dummy == false)
reallocate();
}
MapBlock::~MapBlock()
{
#ifndef SERVER
{
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delete mesh;
mesh = nullptr;
}
#endif
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delete[] data;
}
bool MapBlock::isValidPositionParent(v3s16 p)
{
if(isValidPosition(p))
{
return true;
}
else{
return m_parent->isValidPosition(getPosRelative() + p);
}
}
MapNode MapBlock::getNodeParent(v3s16 p, bool *is_valid_position)
{
if (isValidPosition(p) == false)
return m_parent->getNodeNoEx(getPosRelative() + p, is_valid_position);
if (!data) {
if (is_valid_position)
*is_valid_position = false;
return MapNode(CONTENT_IGNORE);
}
if (is_valid_position)
*is_valid_position = true;
return data[p.Z * zstride + p.Y * ystride + p.X];
}
std::string MapBlock::getModifiedReasonString()
{
std::string reason;
const u32 ubound = MYMIN(sizeof(m_modified_reason) * CHAR_BIT,
ARRLEN(modified_reason_strings));
for (u32 i = 0; i != ubound; i++) {
if ((m_modified_reason & (1 << i)) == 0)
continue;
reason += modified_reason_strings[i];
reason += ", ";
}
if (reason.length() > 2)
reason.resize(reason.length() - 2);
return reason;
}
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/*
Propagates sunlight down through the block.
Doesn't modify nodes that are not affected by sunlight.
Returns false if sunlight at bottom block is invalid.
Returns true if sunlight at bottom block is valid.
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Returns true if bottom block doesn't exist.
If there is a block above, continues from it.
If there is no block above, assumes there is sunlight, unless
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is_underground is set or highest node is water.
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All sunlighted nodes are added to light_sources.
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if remove_light==true, sets non-sunlighted nodes black.
if black_air_left!=NULL, it is set to true if non-sunlighted
air is left in block.
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*/
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bool MapBlock::propagateSunlight(std::set<v3s16> & light_sources,
bool remove_light, bool *black_air_left)
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{
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INodeDefManager *nodemgr = m_gamedef->ndef();
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// Whether the sunlight at the top of the bottom block is valid
bool block_below_is_valid = true;
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v3s16 pos_relative = getPosRelative();
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for(s16 x=0; x<MAP_BLOCKSIZE; x++)
{
for(s16 z=0; z<MAP_BLOCKSIZE; z++)
{
#if 1
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bool no_sunlight = false;
//bool no_top_block = false;
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// Check if node above block has sunlight
bool is_valid_position;
MapNode n = getNodeParent(v3s16(x, MAP_BLOCKSIZE, z),
&is_valid_position);
if (is_valid_position)
{
if(n.getContent() == CONTENT_IGNORE)
{
// Trust heuristics
no_sunlight = is_underground;
}
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else if(n.getLight(LIGHTBANK_DAY, m_gamedef->ndef()) != LIGHT_SUN)
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{
no_sunlight = true;
}
}
else
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{
//no_top_block = true;
// NOTE: This makes over-ground roofed places sunlighted
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// Assume sunlight, unless is_underground==true
if(is_underground)
{
no_sunlight = true;
}
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else
{
MapNode n = getNodeNoEx(v3s16(x, MAP_BLOCKSIZE-1, z));
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if(m_gamedef->ndef()->get(n).sunlight_propagates == false)
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{
no_sunlight = true;
}
}
// NOTE: As of now, this just would make everything dark.
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// No sunlight here
//no_sunlight = true;
}
#endif
#if 0 // Doesn't work; nothing gets light.
bool no_sunlight = true;
bool no_top_block = false;
// Check if node above block has sunlight
try{
MapNode n = getNodeParent(v3s16(x, MAP_BLOCKSIZE, z));
if(n.getLight(LIGHTBANK_DAY) == LIGHT_SUN)
{
no_sunlight = false;
}
}
catch(InvalidPositionException &e)
{
no_top_block = true;
}
#endif
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/*std::cout<<"("<<x<<","<<z<<"): "
<<"no_top_block="<<no_top_block
<<", is_underground="<<is_underground
<<", no_sunlight="<<no_sunlight
<<std::endl;*/
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s16 y = MAP_BLOCKSIZE-1;
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// This makes difference to diminishing in water.
bool stopped_to_solid_object = false;
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u8 current_light = no_sunlight ? 0 : LIGHT_SUN;
for(; y >= 0; y--)
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{
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v3s16 pos(x, y, z);
MapNode &n = getNodeRef(pos);
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if(current_light == 0)
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{
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// Do nothing
}
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else if(current_light == LIGHT_SUN && nodemgr->get(n).sunlight_propagates)
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{
// Do nothing: Sunlight is continued
}
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else if(nodemgr->get(n).light_propagates == false)
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{
// A solid object is on the way.
stopped_to_solid_object = true;
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// Light stops.
current_light = 0;
}
else
{
// Diminish light
current_light = diminish_light(current_light);
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}
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u8 old_light = n.getLight(LIGHTBANK_DAY, nodemgr);
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if(current_light > old_light || remove_light)
{
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n.setLight(LIGHTBANK_DAY, current_light, nodemgr);
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}
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if(diminish_light(current_light) != 0)
{
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light_sources.insert(pos_relative + pos);
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}
if(current_light == 0 && stopped_to_solid_object)
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{
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if(black_air_left)
{
*black_air_left = true;
}
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}
}
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// Whether or not the block below should see LIGHT_SUN
bool sunlight_should_go_down = (current_light == LIGHT_SUN);
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/*
If the block below hasn't already been marked invalid:
Check if the node below the block has proper sunlight at top.
If not, the block below is invalid.
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Ignore non-transparent nodes as they always have no light
*/
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if(block_below_is_valid)
{
MapNode n = getNodeParent(v3s16(x, -1, z), &is_valid_position);
if (is_valid_position) {
if(nodemgr->get(n).light_propagates)
{
if(n.getLight(LIGHTBANK_DAY, nodemgr) == LIGHT_SUN
&& sunlight_should_go_down == false)
block_below_is_valid = false;
else if(n.getLight(LIGHTBANK_DAY, nodemgr) != LIGHT_SUN
&& sunlight_should_go_down == true)
block_below_is_valid = false;
}
}
else
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{
/*std::cout<<"InvalidBlockException for bottom block node"
<<std::endl;*/
// Just no block below, no need to panic.
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}
}
}
}
return block_below_is_valid;
}
void MapBlock::copyTo(VoxelManipulator &dst)
{
v3s16 data_size(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE);
VoxelArea data_area(v3s16(0,0,0), data_size - v3s16(1,1,1));
// Copy from data to VoxelManipulator
dst.copyFrom(data, data_area, v3s16(0,0,0),
getPosRelative(), data_size);
}
void MapBlock::copyFrom(VoxelManipulator &dst)
{
v3s16 data_size(MAP_BLOCKSIZE, MAP_BLOCKSIZE, MAP_BLOCKSIZE);
VoxelArea data_area(v3s16(0,0,0), data_size - v3s16(1,1,1));
// Copy from VoxelManipulator to data
dst.copyTo(data, data_area, v3s16(0,0,0),
getPosRelative(), data_size);
}
void MapBlock::actuallyUpdateDayNightDiff()
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{
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INodeDefManager *nodemgr = m_gamedef->ndef();
// Running this function un-expires m_day_night_differs
m_day_night_differs_expired = false;
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if (!data) {
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m_day_night_differs = false;
return;
}
bool differs = false;
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/*
Check if any lighting value differs
*/
MapNode previous_n(CONTENT_IGNORE);
for (u32 i = 0; i < nodecount; i++) {
MapNode n = data[i];
// If node is identical to previous node, don't verify if it differs
if (n == previous_n)
continue;
differs = !n.isLightDayNightEq(nodemgr);
if (differs)
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break;
previous_n = n;
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}
/*
If some lighting values differ, check if the whole thing is
just air. If it is just air, differs = false
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*/
if (differs) {
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bool only_air = true;
for (u32 i = 0; i < nodecount; i++) {
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MapNode &n = data[i];
if (n.getContent() != CONTENT_AIR) {
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only_air = false;
break;
}
}
if (only_air)
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differs = false;
}
// Set member variable
m_day_night_differs = differs;
}
void MapBlock::expireDayNightDiff()
{
if (!data) {
m_day_night_differs = false;
m_day_night_differs_expired = false;
return;
}
m_day_night_differs_expired = true;
}
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s16 MapBlock::getGroundLevel(v2s16 p2d)
{
if(isDummy())
return -3;
try
{
s16 y = MAP_BLOCKSIZE-1;
for(; y>=0; y--)
{
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MapNode n = getNodeRef(p2d.X, y, p2d.Y);
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if(m_gamedef->ndef()->get(n).walkable)
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{
if(y == MAP_BLOCKSIZE-1)
return -2;
else
return y;
}
}
return -1;
}
catch(InvalidPositionException &e)
{
return -3;
}
}
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/*
Serialization
*/
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// List relevant id-name pairs for ids in the block using nodedef
// Renumbers the content IDs (starting at 0 and incrementing
// use static memory requires about 65535 * sizeof(int) ram in order to be
// sure we can handle all content ids. But it's absolutely worth it as it's
// a speedup of 4 for one of the major time consuming functions on storing
// mapblocks.
static content_t getBlockNodeIdMapping_mapping[USHRT_MAX + 1];
static void getBlockNodeIdMapping(NameIdMapping *nimap, MapNode *nodes,
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INodeDefManager *nodedef)
{
memset(getBlockNodeIdMapping_mapping, 0xFF, (USHRT_MAX + 1) * sizeof(content_t));
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std::set<content_t> unknown_contents;
content_t id_counter = 0;
for (u32 i = 0; i < MapBlock::nodecount; i++) {
content_t global_id = nodes[i].getContent();
content_t id = CONTENT_IGNORE;
// Try to find an existing mapping
if (getBlockNodeIdMapping_mapping[global_id] != 0xFFFF) {
id = getBlockNodeIdMapping_mapping[global_id];
}
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else
{
// We have to assign a new mapping
id = id_counter++;
getBlockNodeIdMapping_mapping[global_id] = id;
const ContentFeatures &f = nodedef->get(global_id);
const std::string &name = f.name;
if (name.empty())
unknown_contents.insert(global_id);
else
nimap->set(id, name);
}
// Update the MapNode
nodes[i].setContent(id);
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}
for(std::set<content_t>::const_iterator
i = unknown_contents.begin();
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i != unknown_contents.end(); ++i){
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errorstream<<"getBlockNodeIdMapping(): IGNORING ERROR: "
<<"Name for node id "<<(*i)<<" not known"<<std::endl;
}
}
// Correct ids in the block to match nodedef based on names.
// Unknown ones are added to nodedef.
// Will not update itself to match id-name pairs in nodedef.
static void correctBlockNodeIds(const NameIdMapping *nimap, MapNode *nodes,
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IGameDef *gamedef)
{
INodeDefManager *nodedef = gamedef->ndef();
// This means the block contains incorrect ids, and we contain
// the information to convert those to names.
// nodedef contains information to convert our names to globally
// correct ids.
std::unordered_set<content_t> unnamed_contents;
std::unordered_set<std::string> unallocatable_contents;
bool previous_exists = false;
content_t previous_local_id = CONTENT_IGNORE;
content_t previous_global_id = CONTENT_IGNORE;
for (u32 i = 0; i < MapBlock::nodecount; i++) {
content_t local_id = nodes[i].getContent();
// If previous node local_id was found and same than before, don't lookup maps
// apply directly previous resolved id
// This permits to massively improve loading performance when nodes are similar
// example: default:air, default:stone are massively present
if (previous_exists && local_id == previous_local_id) {
nodes[i].setContent(previous_global_id);
continue;
}
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std::string name;
if (!nimap->getName(local_id, name)) {
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unnamed_contents.insert(local_id);
previous_exists = false;
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continue;
}
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content_t global_id;
if (!nodedef->getId(name, global_id)) {
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global_id = gamedef->allocateUnknownNodeId(name);
if (global_id == CONTENT_IGNORE) {
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unallocatable_contents.insert(name);
previous_exists = false;
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continue;
}
}
nodes[i].setContent(global_id);
// Save previous node local_id & global_id result
previous_local_id = local_id;
previous_global_id = global_id;
previous_exists = true;
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}
for (const content_t c: unnamed_contents) {
errorstream << "correctBlockNodeIds(): IGNORING ERROR: "
<< "Block contains id " << c
<< " with no name mapping" << std::endl;
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}
for (const std::string &node_name: unallocatable_contents) {
errorstream << "correctBlockNodeIds(): IGNORING ERROR: "
<< "Could not allocate global id for node name \""
<< node_name << "\"" << std::endl;
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}
}
void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
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{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapBlock format not supported");
if (!data)
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throw SerializationError("ERROR: Not writing dummy block.");
FATAL_ERROR_IF(version < SER_FMT_VER_LOWEST_WRITE, "Serialisation version error");
// First byte
u8 flags = 0;
if(is_underground)
flags |= 0x01;
if(getDayNightDiff())
flags |= 0x02;
if(m_generated == false)
flags |= 0x08;
writeU8(os, flags);
if (version >= 27) {
writeU16(os, m_lighting_complete);
}
/*
Bulk node data
*/
NameIdMapping nimap;
if(disk)
{
MapNode *tmp_nodes = new MapNode[nodecount];
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for(u32 i=0; i<nodecount; i++)
tmp_nodes[i] = data[i];
getBlockNodeIdMapping(&nimap, tmp_nodes, m_gamedef->ndef());
u8 content_width = 2;
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, tmp_nodes, nodecount,
content_width, params_width, true);
delete[] tmp_nodes;
}
else
{
u8 content_width = 2;
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, data, nodecount,
content_width, params_width, true);
}
/*
Node metadata
*/
std::ostringstream oss(std::ios_base::binary);
m_node_metadata.serialize(oss, version, disk);
compressZlib(oss.str(), os);
/*
Data that goes to disk, but not the network
*/
if(disk)
{
if(version <= 24){
// Node timers
m_node_timers.serialize(os, version);
}
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// Static objects
m_static_objects.serialize(os);
// Timestamp
writeU32(os, getTimestamp());
// Write block-specific node definition id mapping
nimap.serialize(os);
if(version >= 25){
// Node timers
m_node_timers.serialize(os, version);
}
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}
}
void MapBlock::serializeNetworkSpecific(std::ostream &os)
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{
if (!data) {
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throw SerializationError("ERROR: Not writing dummy block.");
}
writeU8(os, 1); // version
writeF1000(os, 0); // deprecated heat
writeF1000(os, 0); // deprecated humidity
}
void MapBlock::deSerialize(std::istream &is, u8 version, bool disk)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapBlock format not supported");
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())<<std::endl);
m_day_night_differs_expired = false;
if(version <= 21)
{
deSerialize_pre22(is, version, disk);
return;
}
u8 flags = readU8(is);
is_underground = (flags & 0x01) ? true : false;
m_day_night_differs = (flags & 0x02) ? true : false;
if (version < 27)
m_lighting_complete = 0xFFFF;
else
m_lighting_complete = readU16(is);
m_generated = (flags & 0x08) ? false : true;
/*
Bulk node data
*/
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Bulk node data"<<std::endl);
u8 content_width = readU8(is);
u8 params_width = readU8(is);
if(content_width != 1 && content_width != 2)
throw SerializationError("MapBlock::deSerialize(): invalid content_width");
if(params_width != 2)
throw SerializationError("MapBlock::deSerialize(): invalid params_width");
MapNode::deSerializeBulk(is, version, data, nodecount,
content_width, params_width, true);
/*
NodeMetadata
*/
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Node metadata"<<std::endl);
// Ignore errors
try {
std::ostringstream oss(std::ios_base::binary);
decompressZlib(is, oss);
std::istringstream iss(oss.str(), std::ios_base::binary);
if (version >= 23)
m_node_metadata.deSerialize(iss, m_gamedef->idef());
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else
content_nodemeta_deserialize_legacy(iss,
&m_node_metadata, &m_node_timers,
m_gamedef->idef());
} catch(SerializationError &e) {
warningstream<<"MapBlock::deSerialize(): Ignoring an error"
<<" while deserializing node metadata at ("
<<PP(getPos())<<": "<<e.what()<<std::endl;
}
/*
Data that is only on disk
*/
if(disk)
{
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// Node timers
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if(version == 23){
// Read unused zero
readU8(is);
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}
if(version == 24){
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Node timers (ver==24)"<<std::endl);
m_node_timers.deSerialize(is, version);
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}
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// Static objects
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Static objects"<<std::endl);
m_static_objects.deSerialize(is);
// Timestamp
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Timestamp"<<std::endl);
setTimestamp(readU32(is));
m_disk_timestamp = m_timestamp;
// Dynamically re-set ids based on node names
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": NameIdMapping"<<std::endl);
NameIdMapping nimap;
nimap.deSerialize(is);
correctBlockNodeIds(&nimap, data, m_gamedef);
if(version >= 25){
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Node timers (ver>=25)"<<std::endl);
m_node_timers.deSerialize(is, version);
}
}
TRACESTREAM(<<"MapBlock::deSerialize "<<PP(getPos())
<<": Done."<<std::endl);
}
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void MapBlock::deSerializeNetworkSpecific(std::istream &is)
{
try {
int version = readU8(is);
//if(version != 1)
// throw SerializationError("unsupported MapBlock version");
if(version >= 1) {
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readF1000(is); // deprecated heat
readF1000(is); // deprecated humidity
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}
}
catch(SerializationError &e)
{
warningstream<<"MapBlock::deSerializeNetworkSpecific(): Ignoring an error"
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<<": "<<e.what()<<std::endl;
}
}
/*
Legacy serialization
*/
void MapBlock::deSerialize_pre22(std::istream &is, u8 version, bool disk)
{
// Initialize default flags
is_underground = false;
m_day_night_differs = false;
m_lighting_complete = 0xFFFF;
m_generated = true;
// Make a temporary buffer
u32 ser_length = MapNode::serializedLength(version);
SharedBuffer<u8> databuf_nodelist(nodecount * ser_length);
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// These have no compression
if (version <= 3 || version == 5 || version == 6) {
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char tmp;
is.read(&tmp, 1);
if (is.gcount() != 1)
throw SerializationError(std::string(FUNCTION_NAME)
+ ": not enough input data");
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is_underground = tmp;
is.read((char *)*databuf_nodelist, nodecount * ser_length);
if ((u32)is.gcount() != nodecount * ser_length)
throw SerializationError(std::string(FUNCTION_NAME)
+ ": not enough input data");
} else if (version <= 10) {
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u8 t8;
is.read((char *)&t8, 1);
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is_underground = t8;
{
// Uncompress and set material data
std::ostringstream os(std::ios_base::binary);
decompress(is, os, version);
std::string s = os.str();
if (s.size() != nodecount)
throw SerializationError(std::string(FUNCTION_NAME)
+ ": not enough input data");
for (u32 i = 0; i < s.size(); i++) {
databuf_nodelist[i*ser_length] = s[i];
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}
}
{
// Uncompress and set param data
std::ostringstream os(std::ios_base::binary);
decompress(is, os, version);
std::string s = os.str();
if (s.size() != nodecount)
throw SerializationError(std::string(FUNCTION_NAME)
+ ": not enough input data");
for (u32 i = 0; i < s.size(); i++) {
databuf_nodelist[i*ser_length + 1] = s[i];
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}
}
if (version >= 10) {
// Uncompress and set param2 data
std::ostringstream os(std::ios_base::binary);
decompress(is, os, version);
std::string s = os.str();
if (s.size() != nodecount)
throw SerializationError(std::string(FUNCTION_NAME)
+ ": not enough input data");
for (u32 i = 0; i < s.size(); i++) {
databuf_nodelist[i*ser_length + 2] = s[i];
}
}
} else { // All other versions (10 to 21)
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u8 flags;
is.read((char*)&flags, 1);
is_underground = (flags & 0x01) ? true : false;
m_day_night_differs = (flags & 0x02) ? true : false;
if(version >= 18)
m_generated = (flags & 0x08) ? false : true;
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// Uncompress data
std::ostringstream os(std::ios_base::binary);
decompress(is, os, version);
std::string s = os.str();
if (s.size() != nodecount * 3)
throw SerializationError(std::string(FUNCTION_NAME)
+ ": decompress resulted in size other than nodecount*3");
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// deserialize nodes from buffer
for (u32 i = 0; i < nodecount; i++) {
databuf_nodelist[i*ser_length] = s[i];
databuf_nodelist[i*ser_length + 1] = s[i+nodecount];
databuf_nodelist[i*ser_length + 2] = s[i+nodecount*2];
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}
/*
NodeMetadata
*/
if (version >= 14) {
// Ignore errors
try {
if (version <= 15) {
std::string data = deSerializeString(is);
std::istringstream iss(data, std::ios_base::binary);
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content_nodemeta_deserialize_legacy(iss,
&m_node_metadata, &m_node_timers,
m_gamedef->idef());
} else {
//std::string data = deSerializeLongString(is);
std::ostringstream oss(std::ios_base::binary);
decompressZlib(is, oss);
std::istringstream iss(oss.str(), std::ios_base::binary);
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content_nodemeta_deserialize_legacy(iss,
&m_node_metadata, &m_node_timers,
m_gamedef->idef());
}
} catch(SerializationError &e) {
warningstream<<"MapBlock::deSerialize(): Ignoring an error"
<<" while deserializing node metadata"<<std::endl;
}
}
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}
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// Deserialize node data
for (u32 i = 0; i < nodecount; i++) {
data[i].deSerialize(&databuf_nodelist[i * ser_length], version);
}
if (disk) {
/*
Versions up from 9 have block objects. (DEPRECATED)
*/
if (version >= 9) {
u16 count = readU16(is);
// Not supported and length not known if count is not 0
if(count != 0){
warningstream<<"MapBlock::deSerialize_pre22(): "
<<"Ignoring stuff coming at and after MBOs"<<std::endl;
return;
}
}
/*
Versions up from 15 have static objects.
*/
if (version >= 15)
m_static_objects.deSerialize(is);
// Timestamp
if (version >= 17) {
setTimestamp(readU32(is));
m_disk_timestamp = m_timestamp;
} else {
setTimestamp(BLOCK_TIMESTAMP_UNDEFINED);
}
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// Dynamically re-set ids based on node names
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NameIdMapping nimap;
// If supported, read node definition id mapping
if (version >= 21) {
nimap.deSerialize(is);
// Else set the legacy mapping
} else {
content_mapnode_get_name_id_mapping(&nimap);
}
correctBlockNodeIds(&nimap, data, m_gamedef);
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}
// Legacy data changes
// This code has to convert from pre-22 to post-22 format.
INodeDefManager *nodedef = m_gamedef->ndef();
for(u32 i=0; i<nodecount; i++)
{
const ContentFeatures &f = nodedef->get(data[i].getContent());
// Mineral
if(nodedef->getId("default:stone") == data[i].getContent()
&& data[i].getParam1() == 1)
{
data[i].setContent(nodedef->getId("default:stone_with_coal"));
data[i].setParam1(0);
}
else if(nodedef->getId("default:stone") == data[i].getContent()
&& data[i].getParam1() == 2)
{
data[i].setContent(nodedef->getId("default:stone_with_iron"));
data[i].setParam1(0);
}
// facedir_simple
if(f.legacy_facedir_simple)
{
data[i].setParam2(data[i].getParam1());
data[i].setParam1(0);
}
// wall_mounted
if(f.legacy_wallmounted)
{
u8 wallmounted_new_to_old[8] = {0x04, 0x08, 0x01, 0x02, 0x10, 0x20, 0, 0};
u8 dir_old_format = data[i].getParam2();
u8 dir_new_format = 0;
for(u8 j=0; j<8; j++)
{
if((dir_old_format & wallmounted_new_to_old[j]) != 0)
{
dir_new_format = j;
break;
}
}
data[i].setParam2(dir_new_format);
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}
}
}
/*
Get a quick string to describe what a block actually contains
*/
std::string analyze_block(MapBlock *block)
{
if(block == NULL)
return "NULL";
std::ostringstream desc;
v3s16 p = block->getPos();
char spos[25];
snprintf(spos, sizeof(spos), "(%2d,%2d,%2d), ", p.X, p.Y, p.Z);
desc<<spos;
switch(block->getModified())
{
case MOD_STATE_CLEAN:
desc<<"CLEAN, ";
break;
case MOD_STATE_WRITE_AT_UNLOAD:
desc<<"WRITE_AT_UNLOAD, ";
break;
case MOD_STATE_WRITE_NEEDED:
desc<<"WRITE_NEEDED, ";
break;
default:
desc<<"unknown getModified()="+itos(block->getModified())+", ";
}
if(block->isGenerated())
desc<<"is_gen [X], ";
else
desc<<"is_gen [ ], ";
if(block->getIsUnderground())
desc<<"is_ug [X], ";
else
desc<<"is_ug [ ], ";
desc<<"lighting_complete: "<<block->getLightingComplete()<<", ";
if(block->isDummy())
{
desc<<"Dummy, ";
}
else
{
bool full_ignore = true;
bool some_ignore = false;
bool full_air = true;
bool some_air = false;
for(s16 z0=0; z0<MAP_BLOCKSIZE; z0++)
for(s16 y0=0; y0<MAP_BLOCKSIZE; y0++)
for(s16 x0=0; x0<MAP_BLOCKSIZE; x0++)
{
v3s16 p(x0,y0,z0);
MapNode n = block->getNodeNoEx(p);
content_t c = n.getContent();
if(c == CONTENT_IGNORE)
some_ignore = true;
else
full_ignore = false;
if(c == CONTENT_AIR)
some_air = true;
else
full_air = false;
}
desc<<"content {";
std::ostringstream ss;
if(full_ignore)
ss<<"IGNORE (full), ";
else if(some_ignore)
ss<<"IGNORE, ";
if(full_air)
ss<<"AIR (full), ";
else if(some_air)
ss<<"AIR, ";
if(ss.str().size()>=2)
desc<<ss.str().substr(0, ss.str().size()-2);
desc<<"}, ";
}
return desc.str().substr(0, desc.str().size()-2);
}
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//END