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 "client/mapblock_mesh.h"
#endif
#include "porting.h"
#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)
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;
}
return m_parent->isValidPosition(getPosRelative() + p);
}
MapNode MapBlock::getNodeParent(v3s16 p, bool *is_valid_position)
{
if (!isValidPosition(p))
return m_parent->getNode(getPosRelative() + p, is_valid_position);
if (!data) {
if (is_valid_position)
*is_valid_position = false;
return {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;
}
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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{
const NodeDefManager *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);
if (m_gamedef->ndef()->get(n).walkable) {
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if(y == MAP_BLOCKSIZE-1)
return -2;
return y;
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}
}
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,
const NodeDefManager *nodedef)
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{
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 (u16 unknown_content : unknown_contents) {
errorstream << "getBlockNodeIdMapping(): IGNORING ERROR: "
<< "Name for node id " << unknown_content << " not known" << std::endl;
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}
}
// 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)
{
const NodeDefManager *nodedef = gamedef->ndef();
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// 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, int compression_level)
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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)
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, compression_level);
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, compression_level);
}
/*
Node metadata
*/
std::ostringstream oss(std::ios_base::binary);
m_node_metadata.serialize(oss, version, disk);
compressZlib(oss.str(), os, compression_level);
/*
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, 2); // version
}
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) != 0;
m_day_night_differs = (flags & 0x02) != 0;
if (version < 27)
m_lighting_complete = 0xFFFF;
else
m_lighting_complete = readU16(is);
m_generated = (flags & 0x08) == 0;
/*
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);
/*
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);
setTimestampNoChangedFlag(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 {
readU8(is);
//const u8 version = readU8(is);
//if (version != 1)
//throw SerializationError("unsupported MapBlock version");
} 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) != 0;
m_day_night_differs = (flags & 0x02) != 0;
if(version >= 18)
m_generated = (flags & 0x08) == 0;
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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 = deSerializeString16(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 = deSerializeString32(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) {
setTimestampNoChangedFlag(readU32(is));
m_disk_timestamp = m_timestamp;
} else {
setTimestampNoChangedFlag(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.
const NodeDefManager *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);
2011-10-15 01:28:57 +02:00
}
}
}
/*
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];
porting::mt_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);
}
2010-11-27 00:02:21 +01:00
//END