/* Minetest-c55 Copyright (C) 2010 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 General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU 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 "mapblock.h" #include "map.h" // For g_settings #include "main.h" #include "light.h" #include <sstream> /* MapBlock */ MapBlock::MapBlock(NodeContainer *parent, v3s16 pos, bool dummy): m_parent(parent), m_pos(pos), m_modified(MOD_STATE_WRITE_NEEDED), is_underground(false), m_lighting_expired(true), m_day_night_differs(false), m_generated(false), m_objects(this), m_timestamp(BLOCK_TIMESTAMP_UNDEFINED), m_usage_timer(BLOCK_TIMESTAMP_UNDEFINED) { data = NULL; if(dummy == false) reallocate(); //m_spawn_timer = -10000; #ifndef SERVER m_mesh_expired = false; mesh_mutex.Init(); mesh = NULL; m_temp_mods_mutex.Init(); #endif } MapBlock::~MapBlock() { #ifndef SERVER { JMutexAutoLock lock(mesh_mutex); if(mesh) { mesh->drop(); mesh = NULL; } } #endif if(data) delete[] data; } bool MapBlock::isValidPositionParent(v3s16 p) { if(isValidPosition(p)) { return true; } else{ return m_parent->isValidPosition(getPosRelative() + p); } } MapNode MapBlock::getNodeParent(v3s16 p) { if(isValidPosition(p) == false) { return m_parent->getNode(getPosRelative() + p); } else { if(data == NULL) throw InvalidPositionException(); return data[p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X]; } } void MapBlock::setNodeParent(v3s16 p, MapNode & n) { if(isValidPosition(p) == false) { m_parent->setNode(getPosRelative() + p, n); } else { if(data == NULL) throw InvalidPositionException(); data[p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X] = n; } } MapNode MapBlock::getNodeParentNoEx(v3s16 p) { if(isValidPosition(p) == false) { try{ return m_parent->getNode(getPosRelative() + p); } catch(InvalidPositionException &e) { return MapNode(CONTENT_IGNORE); } } else { if(data == NULL) { return MapNode(CONTENT_IGNORE); } return data[p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X]; } } #ifndef SERVER #if 1 void MapBlock::updateMesh(u32 daynight_ratio) { #if 0 /* DEBUG: If mesh has been generated, don't generate it again */ { JMutexAutoLock meshlock(mesh_mutex); if(mesh != NULL) return; } #endif MeshMakeData data; data.fill(daynight_ratio, this); scene::SMesh *mesh_new = makeMapBlockMesh(&data); /* Replace the mesh */ replaceMesh(mesh_new); } #endif void MapBlock::replaceMesh(scene::SMesh *mesh_new) { mesh_mutex.Lock(); //scene::SMesh *mesh_old = mesh[daynight_i]; //mesh[daynight_i] = mesh_new; scene::SMesh *mesh_old = mesh; mesh = mesh_new; setMeshExpired(false); if(mesh_old != NULL) { // Remove hardware buffers of meshbuffers of mesh // NOTE: No way, this runs in a different thread and everything /*u32 c = mesh_old->getMeshBufferCount(); for(u32 i=0; i<c; i++) { IMeshBuffer *buf = mesh_old->getMeshBuffer(i); }*/ /*dstream<<"mesh_old->getReferenceCount()=" <<mesh_old->getReferenceCount()<<std::endl; u32 c = mesh_old->getMeshBufferCount(); for(u32 i=0; i<c; i++) { scene::IMeshBuffer *buf = mesh_old->getMeshBuffer(i); dstream<<"buf->getReferenceCount()=" <<buf->getReferenceCount()<<std::endl; }*/ // Drop the mesh mesh_old->drop(); //delete mesh_old; } mesh_mutex.Unlock(); } #endif // !SERVER /* 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. 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 is_underground is set or highest node is water. All sunlighted nodes are added to light_sources. 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. */ bool MapBlock::propagateSunlight(core::map<v3s16, bool> & light_sources, bool remove_light, bool *black_air_left) { // Whether the sunlight at the top of the bottom block is valid bool block_below_is_valid = true; v3s16 pos_relative = getPosRelative(); for(s16 x=0; x<MAP_BLOCKSIZE; x++) { for(s16 z=0; z<MAP_BLOCKSIZE; z++) { #if 1 bool no_sunlight = false; bool no_top_block = false; // Check if node above block has sunlight try{ MapNode n = getNodeParent(v3s16(x, MAP_BLOCKSIZE, z)); if(n.d == CONTENT_IGNORE || n.getLight(LIGHTBANK_DAY) != LIGHT_SUN) { no_sunlight = true; } } catch(InvalidPositionException &e) { no_top_block = true; // NOTE: This makes over-ground roofed places sunlighted // Assume sunlight, unless is_underground==true if(is_underground) { no_sunlight = true; } else { MapNode n = getNode(v3s16(x, MAP_BLOCKSIZE-1, z)); //if(n.d == CONTENT_WATER || n.d == CONTENT_WATERSOURCE) if(content_features(n.d).sunlight_propagates == false) { no_sunlight = true; } } // NOTE: As of now, this just would make everything dark. // 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 /*std::cout<<"("<<x<<","<<z<<"): " <<"no_top_block="<<no_top_block <<", is_underground="<<is_underground <<", no_sunlight="<<no_sunlight <<std::endl;*/ s16 y = MAP_BLOCKSIZE-1; // This makes difference to diminishing in water. bool stopped_to_solid_object = false; u8 current_light = no_sunlight ? 0 : LIGHT_SUN; for(; y >= 0; y--) { v3s16 pos(x, y, z); MapNode &n = getNodeRef(pos); if(current_light == 0) { // Do nothing } else if(current_light == LIGHT_SUN && n.sunlight_propagates()) { // Do nothing: Sunlight is continued } else if(n.light_propagates() == false) { /*// DEPRECATED TODO: REMOVE if(grow_grass) { bool upper_is_air = false; try { if(getNodeParent(pos+v3s16(0,1,0)).d == CONTENT_AIR) upper_is_air = true; } catch(InvalidPositionException &e) { } // Turn mud into grass if(upper_is_air && n.d == CONTENT_MUD && current_light == LIGHT_SUN) { n.d = CONTENT_GRASS; } }*/ // A solid object is on the way. stopped_to_solid_object = true; // Light stops. current_light = 0; } else { // Diminish light current_light = diminish_light(current_light); } u8 old_light = n.getLight(LIGHTBANK_DAY); if(current_light > old_light || remove_light) { n.setLight(LIGHTBANK_DAY, current_light); } if(diminish_light(current_light) != 0) { light_sources.insert(pos_relative + pos, true); } if(current_light == 0 && stopped_to_solid_object) { if(black_air_left) { *black_air_left = true; } } } // Whether or not the block below should see LIGHT_SUN bool sunlight_should_go_down = (current_light == LIGHT_SUN); /* 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. Ignore non-transparent nodes as they always have no light */ try { if(block_below_is_valid) { MapNode n = getNodeParent(v3s16(x, -1, z)); if(n.light_propagates()) { if(n.getLight(LIGHTBANK_DAY) == LIGHT_SUN && sunlight_should_go_down == false) block_below_is_valid = false; else if(n.getLight(LIGHTBANK_DAY) != LIGHT_SUN && sunlight_should_go_down == true) block_below_is_valid = false; } }//if }//try catch(InvalidPositionException &e) { /*std::cout<<"InvalidBlockException for bottom block node" <<std::endl;*/ // Just no block below, no need to panic. } } } 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::stepObjects(float dtime, bool server, u32 daynight_ratio) { /* Step objects */ m_objects.step(dtime, server, daynight_ratio); setChangedFlag(); } void MapBlock::updateDayNightDiff() { if(data == NULL) { m_day_night_differs = false; return; } bool differs = false; /* Check if any lighting value differs */ for(u32 i=0; i<MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; i++) { MapNode &n = data[i]; if(n.getLight(LIGHTBANK_DAY) != n.getLight(LIGHTBANK_NIGHT)) { differs = true; break; } } /* If some lighting values differ, check if the whole thing is just air. If it is, differ = false */ if(differs) { bool only_air = true; for(u32 i=0; i<MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; i++) { MapNode &n = data[i]; if(n.d != CONTENT_AIR) { only_air = false; break; } } if(only_air) differs = false; } // Set member variable m_day_night_differs = differs; } s16 MapBlock::getGroundLevel(v2s16 p2d) { if(isDummy()) return -3; try { s16 y = MAP_BLOCKSIZE-1; for(; y>=0; y--) { //if(is_ground_content(getNodeRef(p2d.X, y, p2d.Y).d)) if(content_features(getNodeRef(p2d.X, y, p2d.Y).d).walkable) { if(y == MAP_BLOCKSIZE-1) return -2; else return y; } } return -1; } catch(InvalidPositionException &e) { return -3; } } /* Serialization */ void MapBlock::serialize(std::ostream &os, u8 version) { if(!ser_ver_supported(version)) throw VersionMismatchException("ERROR: MapBlock format not supported"); if(data == NULL) { throw SerializationError("ERROR: Not writing dummy block."); } // These have no compression if(version <= 3 || version == 5 || version == 6) { u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; u32 buflen = 1 + nodecount * MapNode::serializedLength(version); SharedBuffer<u8> dest(buflen); dest[0] = is_underground; for(u32 i=0; i<nodecount; i++) { u32 s = 1 + i * MapNode::serializedLength(version); data[i].serialize(&dest[s], version); } os.write((char*)*dest, dest.getSize()); } else if(version <= 10) { /* With compression. Compress the materials and the params separately. */ // First byte os.write((char*)&is_underground, 1); u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; // Get and compress materials SharedBuffer<u8> materialdata(nodecount); for(u32 i=0; i<nodecount; i++) { materialdata[i] = data[i].d; } compress(materialdata, os, version); // Get and compress lights SharedBuffer<u8> lightdata(nodecount); for(u32 i=0; i<nodecount; i++) { lightdata[i] = data[i].param; } compress(lightdata, os, version); if(version >= 10) { // Get and compress param2 SharedBuffer<u8> param2data(nodecount); for(u32 i=0; i<nodecount; i++) { param2data[i] = data[i].param2; } compress(param2data, os, version); } } // All other versions (newest) else { // First byte u8 flags = 0; if(is_underground) flags |= 0x01; if(m_day_night_differs) flags |= 0x02; if(m_lighting_expired) flags |= 0x04; if(version >= 18) { if(m_generated == false) flags |= 0x08; } os.write((char*)&flags, 1); u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; /* Get data */ SharedBuffer<u8> databuf(nodecount*3); // Get contents for(u32 i=0; i<nodecount; i++) { databuf[i] = data[i].d; } // Get params for(u32 i=0; i<nodecount; i++) { databuf[i+nodecount] = data[i].param; } // Get param2 for(u32 i=0; i<nodecount; i++) { databuf[i+nodecount*2] = data[i].param2; } /* Compress data to output stream */ compress(databuf, os, version); /* NodeMetadata */ if(version >= 14) { if(version <= 15) { try{ std::ostringstream oss(std::ios_base::binary); m_node_metadata.serialize(oss); os<<serializeString(oss.str()); } // This will happen if the string is longer than 65535 catch(SerializationError &e) { // Use an empty string os<<serializeString(""); } } else { std::ostringstream oss(std::ios_base::binary); m_node_metadata.serialize(oss); compressZlib(oss.str(), os); //os<<serializeLongString(oss.str()); } } } } void MapBlock::deSerialize(std::istream &is, u8 version) { if(!ser_ver_supported(version)) throw VersionMismatchException("ERROR: MapBlock format not supported"); // These have no lighting info if(version <= 1) { setLightingExpired(true); } // These have no "generated" field if(version < 18) { m_generated = true; } // These have no compression if(version <= 3 || version == 5 || version == 6) { u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; char tmp; is.read(&tmp, 1); if(is.gcount() != 1) throw SerializationError ("MapBlock::deSerialize: no enough input data"); is_underground = tmp; for(u32 i=0; i<nodecount; i++) { s32 len = MapNode::serializedLength(version); SharedBuffer<u8> d(len); is.read((char*)*d, len); if(is.gcount() != len) throw SerializationError ("MapBlock::deSerialize: no enough input data"); data[i].deSerialize(*d, version); } } else if(version <= 10) { u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; u8 t8; is.read((char*)&t8, 1); 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 ("MapBlock::deSerialize: invalid format"); for(u32 i=0; i<s.size(); i++) { data[i].d = s[i]; } } { // 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 ("MapBlock::deSerialize: invalid format"); for(u32 i=0; i<s.size(); i++) { data[i].param = s[i]; } } 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 ("MapBlock::deSerialize: invalid format"); for(u32 i=0; i<s.size(); i++) { data[i].param2 = s[i]; } } } // All other versions (newest) else { u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; u8 flags; is.read((char*)&flags, 1); is_underground = (flags & 0x01) ? true : false; m_day_night_differs = (flags & 0x02) ? true : false; m_lighting_expired = (flags & 0x04) ? true : false; if(version >= 18) m_generated = (flags & 0x08) ? false : true; // 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 ("MapBlock::deSerialize: decompress resulted in size" " other than nodecount*3"); // Set contents for(u32 i=0; i<nodecount; i++) { data[i].d = s[i]; } // Set params for(u32 i=0; i<nodecount; i++) { data[i].param = s[i+nodecount]; } // Set param2 for(u32 i=0; i<nodecount; i++) { data[i].param2 = s[i+nodecount*2]; } /* NodeMetadata */ if(version >= 14) { // Ignore errors try{ if(version <= 15) { std::string data = deSerializeString(is); std::istringstream iss(data, std::ios_base::binary); m_node_metadata.deSerialize(iss); } 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); m_node_metadata.deSerialize(iss); } } catch(SerializationError &e) { dstream<<"WARNING: MapBlock::deSerialize(): Ignoring an error" <<" while deserializing node metadata"<<std::endl; } } } /* Translate nodes as specified in the translate_to fields of node features NOTE: This isn't really used. Should it be removed? */ for(u32 i=0; i<MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE; i++) { MapNode &n = data[i]; MapNode *translate_to = content_features(n.d).translate_to; if(translate_to) { dstream<<"MapBlock: WARNING: Translating node "<<n.d<<" to " <<translate_to->d<<std::endl; n = *translate_to; } } } void MapBlock::serializeDiskExtra(std::ostream &os, u8 version) { // Versions up from 9 have block objects. if(version >= 9) { //serializeObjects(os, version); // DEPRECATED // count=0 writeU16(os, 0); } // Versions up from 15 have static objects. if(version >= 15) { m_static_objects.serialize(os); } // Timestamp if(version >= 17) { writeU32(os, getTimestamp()); } } void MapBlock::deSerializeDiskExtra(std::istream &is, u8 version) { /* Versions up from 9 have block objects. */ if(version >= 9) { updateObjects(is, version, NULL, 0); } /* Versions up from 15 have static objects. */ if(version >= 15) { m_static_objects.deSerialize(is); } // Timestamp if(version >= 17) { setTimestamp(readU32(is)); } else { setTimestamp(BLOCK_TIMESTAMP_UNDEFINED); } } //END