diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/map.cpp | 441 | ||||
| -rw-r--r-- | src/map.h | 16 | ||||
| -rw-r--r-- | src/mapnode.cpp | 16 | ||||
| -rw-r--r-- | src/mapnode.h | 9 | ||||
| -rw-r--r-- | src/voxelalgorithms.cpp | 584 | ||||
| -rw-r--r-- | src/voxelalgorithms.h | 20 |
6 files changed, 643 insertions, 443 deletions
diff --git a/src/map.cpp b/src/map.cpp index 38f0fa37c..1694582db 100644 --- a/src/map.cpp +++ b/src/map.cpp @@ -22,6 +22,7 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "mapblock.h" #include "filesys.h" #include "voxel.h" +#include "voxelalgorithms.h" #include "porting.h" #include "serialization.h" #include "nodemetadata.h" @@ -234,7 +235,6 @@ void Map::setNode(v3s16 p, MapNode & n) block->setNodeNoCheck(relpos, n); } - /* Goes recursively through the neighbours of the node. @@ -414,20 +414,6 @@ void Map::unspreadLight(enum LightBank bank, } /* - A single-node wrapper of the above -*/ -void Map::unLightNeighbors(enum LightBank bank, - v3s16 pos, u8 lightwas, - std::set<v3s16> & light_sources, - std::map<v3s16, MapBlock*> & modified_blocks) -{ - std::map<v3s16, u8> from_nodes; - from_nodes[pos] = lightwas; - - unspreadLight(bank, from_nodes, light_sources, modified_blocks); -} - -/* Lights neighbors of from_nodes, collects all them and then goes on recursively. */ @@ -568,108 +554,6 @@ void Map::spreadLight(enum LightBank bank, spreadLight(bank, lighted_nodes, modified_blocks); } -/* - A single-node source variation of the above. -*/ -void Map::lightNeighbors(enum LightBank bank, - v3s16 pos, - std::map<v3s16, MapBlock*> & modified_blocks) -{ - std::set<v3s16> from_nodes; - from_nodes.insert(pos); - spreadLight(bank, from_nodes, modified_blocks); -} - -v3s16 Map::getBrightestNeighbour(enum LightBank bank, v3s16 p) -{ - INodeDefManager *nodemgr = m_gamedef->ndef(); - - v3s16 dirs[6] = { - v3s16(0,0,1), // back - v3s16(0,1,0), // top - v3s16(1,0,0), // right - v3s16(0,0,-1), // front - v3s16(0,-1,0), // bottom - v3s16(-1,0,0), // left - }; - - u8 brightest_light = 0; - v3s16 brightest_pos(0,0,0); - bool found_something = false; - - // Loop through 6 neighbors - for(u16 i=0; i<6; i++){ - // Get the position of the neighbor node - v3s16 n2pos = p + dirs[i]; - MapNode n2; - bool is_valid_position; - n2 = getNodeNoEx(n2pos, &is_valid_position); - if (!is_valid_position) - continue; - - if(n2.getLight(bank, nodemgr) > brightest_light || found_something == false){ - brightest_light = n2.getLight(bank, nodemgr); - brightest_pos = n2pos; - found_something = true; - } - } - - if(found_something == false) - throw InvalidPositionException(); - - return brightest_pos; -} - -/* - Propagates sunlight down from a node. - Starting point gets sunlight. - - Returns the lowest y value of where the sunlight went. - - Mud is turned into grass in where the sunlight stops. -*/ -s16 Map::propagateSunlight(v3s16 start, - std::map<v3s16, MapBlock*> & modified_blocks) -{ - INodeDefManager *nodemgr = m_gamedef->ndef(); - - s16 y = start.Y; - for(; ; y--) - { - v3s16 pos(start.X, y, start.Z); - - v3s16 blockpos = getNodeBlockPos(pos); - MapBlock *block; - try{ - block = getBlockNoCreate(blockpos); - } - catch(InvalidPositionException &e) - { - break; - } - - v3s16 relpos = pos - blockpos*MAP_BLOCKSIZE; - bool is_valid_position; - MapNode n = block->getNode(relpos, &is_valid_position); - if (!is_valid_position) - break; - - if(nodemgr->get(n).sunlight_propagates) - { - n.setLight(LIGHTBANK_DAY, LIGHT_SUN, nodemgr); - block->setNode(relpos, n); - - modified_blocks[blockpos] = block; - } - else - { - // Sunlight goes no further - break; - } - } - return y + 1; -} - void Map::updateLighting(enum LightBank bank, std::map<v3s16, MapBlock*> & a_blocks, std::map<v3s16, MapBlock*> & modified_blocks) @@ -922,150 +806,29 @@ void Map::updateLighting(std::map<v3s16, MapBlock*> & a_blocks, } } -/* -*/ void Map::addNodeAndUpdate(v3s16 p, MapNode n, std::map<v3s16, MapBlock*> &modified_blocks, bool remove_metadata) { INodeDefManager *ndef = m_gamedef->ndef(); - /*PrintInfo(m_dout); - m_dout<<"Map::addNodeAndUpdate(): p=(" - <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/ - - /* - From this node to nodes underneath: - If lighting is sunlight (1.0), unlight neighbours and - set lighting to 0. - Else discontinue. - */ - - v3s16 toppos = p + v3s16(0,1,0); - //v3s16 bottompos = p + v3s16(0,-1,0); - - bool node_under_sunlight = true; - std::set<v3s16> light_sources; - - /* - Collect old node for rollback - */ + // Collect old node for rollback RollbackNode rollback_oldnode(this, p, m_gamedef); - /* - If there is a node at top and it doesn't have sunlight, - there has not been any sunlight going down. - - Otherwise there probably is. - */ - - bool is_valid_position; - MapNode topnode = getNodeNoEx(toppos, &is_valid_position); - - if(is_valid_position && topnode.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN) - node_under_sunlight = false; - - /* - Remove all light that has come out of this node - */ - - enum LightBank banks[] = - { - LIGHTBANK_DAY, - LIGHTBANK_NIGHT - }; - for(s32 i=0; i<2; i++) - { - enum LightBank bank = banks[i]; + // This is needed for updating the lighting + MapNode oldnode = getNodeNoEx(p); - u8 lightwas = getNodeNoEx(p).getLight(bank, ndef); - - // Add the block of the added node to modified_blocks - v3s16 blockpos = getNodeBlockPos(p); - MapBlock * block = getBlockNoCreate(blockpos); - assert(block != NULL); - modified_blocks[blockpos] = block; - - assert(isValidPosition(p)); - - // Unlight neighbours of node. - // This means setting light of all consequent dimmer nodes - // to 0. - // This also collects the nodes at the border which will spread - // light again into this. - unLightNeighbors(bank, p, lightwas, light_sources, modified_blocks); - - n.setLight(bank, 0, ndef); - } - - /* - If node lets sunlight through and is under sunlight, it has - sunlight too. - */ - if(node_under_sunlight && ndef->get(n).sunlight_propagates) - { - n.setLight(LIGHTBANK_DAY, LIGHT_SUN, ndef); - } - - /* - Remove node metadata - */ + // Remove node metadata if (remove_metadata) { removeNodeMetadata(p); } - /* - Set the node on the map - */ - + // Set the node on the map setNode(p, n); - /* - If node is under sunlight and doesn't let sunlight through, - take all sunlighted nodes under it and clear light from them - and from where the light has been spread. - TODO: This could be optimized by mass-unlighting instead - of looping - */ - if(node_under_sunlight && !ndef->get(n).sunlight_propagates) - { - s16 y = p.Y - 1; - for(;; y--){ - //m_dout<<"y="<<y<<std::endl; - v3s16 n2pos(p.X, y, p.Z); - - MapNode n2; - - n2 = getNodeNoEx(n2pos, &is_valid_position); - if (!is_valid_position) - break; - - if(n2.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN) - { - unLightNeighbors(LIGHTBANK_DAY, - n2pos, n2.getLight(LIGHTBANK_DAY, ndef), - light_sources, modified_blocks); - n2.setLight(LIGHTBANK_DAY, 0, ndef); - setNode(n2pos, n2); - } - else - break; - } - } + // Update lighting + voxalgo::update_lighting_node(this, ndef, p, oldnode, modified_blocks); - for(s32 i=0; i<2; i++) - { - enum LightBank bank = banks[i]; - - /* - Spread light from all nodes that might be capable of doing so - */ - spreadLight(bank, light_sources, modified_blocks); - } - - /* - Update information about whether day and night light differ - */ for(std::map<v3s16, MapBlock*>::iterator i = modified_blocks.begin(); i != modified_blocks.end(); ++i) @@ -1073,9 +836,7 @@ void Map::addNodeAndUpdate(v3s16 p, MapNode n, i->second->expireDayNightDiff(); } - /* - Report for rollback - */ + // Report for rollback if(m_gamedef->rollback()) { RollbackNode rollback_newnode(this, p, m_gamedef); @@ -1085,22 +846,23 @@ void Map::addNodeAndUpdate(v3s16 p, MapNode n, } /* - Add neighboring liquid nodes and the node itself if it is - liquid (=water node was added) to transform queue. - */ + Add neighboring liquid nodes and this node to transform queue. + (it's vital for the node itself to get updated last, if it was removed.) + */ v3s16 dirs[7] = { - v3s16(0,0,0), // self v3s16(0,0,1), // back v3s16(0,1,0), // top v3s16(1,0,0), // right v3s16(0,0,-1), // front v3s16(0,-1,0), // bottom v3s16(-1,0,0), // left + v3s16(0,0,0), // self }; for(u16 i=0; i<7; i++) { v3s16 p2 = p + dirs[i]; + bool is_valid_position; MapNode n2 = getNodeNoEx(p2, &is_valid_position); if(is_valid_position && (ndef->get(n2).isLiquid() || n2.getContent() == CONTENT_AIR)) @@ -1110,183 +872,10 @@ void Map::addNodeAndUpdate(v3s16 p, MapNode n, } } -/* -*/ void Map::removeNodeAndUpdate(v3s16 p, std::map<v3s16, MapBlock*> &modified_blocks) { - INodeDefManager *ndef = m_gamedef->ndef(); - - /*PrintInfo(m_dout); - m_dout<<"Map::removeNodeAndUpdate(): p=(" - <<p.X<<","<<p.Y<<","<<p.Z<<")"<<std::endl;*/ - - bool node_under_sunlight = true; - - v3s16 toppos = p + v3s16(0,1,0); - - // Node will be replaced with this - content_t replace_material = CONTENT_AIR; - - /* - Collect old node for rollback - */ - RollbackNode rollback_oldnode(this, p, m_gamedef); - - /* - If there is a node at top and it doesn't have sunlight, - there will be no sunlight going down. - */ - bool is_valid_position; - MapNode topnode = getNodeNoEx(toppos, &is_valid_position); - - if(is_valid_position && topnode.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN) - node_under_sunlight = false; - - std::set<v3s16> light_sources; - - enum LightBank banks[] = - { - LIGHTBANK_DAY, - LIGHTBANK_NIGHT - }; - for(s32 i=0; i<2; i++) - { - enum LightBank bank = banks[i]; - - /* - Unlight neighbors (in case the node is a light source) - */ - unLightNeighbors(bank, p, - getNodeNoEx(p).getLight(bank, ndef), - light_sources, modified_blocks); - } - - /* - Remove node metadata - */ - - removeNodeMetadata(p); - - /* - Remove the node. - This also clears the lighting. - */ - - MapNode n(replace_material); - setNode(p, n); - - for(s32 i=0; i<2; i++) - { - enum LightBank bank = banks[i]; - - /* - Recalculate lighting - */ - spreadLight(bank, light_sources, modified_blocks); - } - - // Add the block of the removed node to modified_blocks - v3s16 blockpos = getNodeBlockPos(p); - MapBlock * block = getBlockNoCreate(blockpos); - assert(block != NULL); - modified_blocks[blockpos] = block; - - /* - If the removed node was under sunlight, propagate the - sunlight down from it and then light all neighbors - of the propagated blocks. - */ - if(node_under_sunlight) - { - s16 ybottom = propagateSunlight(p, modified_blocks); - /*m_dout<<"Node was under sunlight. " - "Propagating sunlight"; - m_dout<<" -> ybottom="<<ybottom<<std::endl;*/ - s16 y = p.Y; - for(; y >= ybottom; y--) - { - v3s16 p2(p.X, y, p.Z); - /*m_dout<<"lighting neighbors of node (" - <<p2.X<<","<<p2.Y<<","<<p2.Z<<")" - <<std::endl;*/ - lightNeighbors(LIGHTBANK_DAY, p2, modified_blocks); - } - } - else - { - // Set the lighting of this node to 0 - // TODO: Is this needed? Lighting is cleared up there already. - MapNode n = getNodeNoEx(p, &is_valid_position); - if (is_valid_position) { - n.setLight(LIGHTBANK_DAY, 0, ndef); - setNode(p, n); - } else { - FATAL_ERROR("Invalid position"); - } - } - - for(s32 i=0; i<2; i++) - { - enum LightBank bank = banks[i]; - - // Get the brightest neighbour node and propagate light from it - v3s16 n2p = getBrightestNeighbour(bank, p); - try{ - //MapNode n2 = getNode(n2p); - lightNeighbors(bank, n2p, modified_blocks); - } - catch(InvalidPositionException &e) - { - } - } - - /* - Update information about whether day and night light differ - */ - for(std::map<v3s16, MapBlock*>::iterator - i = modified_blocks.begin(); - i != modified_blocks.end(); ++i) - { - i->second->expireDayNightDiff(); - } - - /* - Report for rollback - */ - if(m_gamedef->rollback()) - { - RollbackNode rollback_newnode(this, p, m_gamedef); - RollbackAction action; - action.setSetNode(p, rollback_oldnode, rollback_newnode); - m_gamedef->rollback()->reportAction(action); - } - - /* - Add neighboring liquid nodes and this node to transform queue. - (it's vital for the node itself to get updated last.) - */ - v3s16 dirs[7] = { - v3s16(0,0,1), // back - v3s16(0,1,0), // top - v3s16(1,0,0), // right - v3s16(0,0,-1), // front - v3s16(0,-1,0), // bottom - v3s16(-1,0,0), // left - v3s16(0,0,0), // self - }; - for(u16 i=0; i<7; i++) - { - v3s16 p2 = p + dirs[i]; - - bool is_position_valid; - MapNode n2 = getNodeNoEx(p2, &is_position_valid); - if (is_position_valid - && (ndef->get(n2).isLiquid() || n2.getContent() == CONTENT_AIR)) - { - m_transforming_liquid.push_back(p2); - } - } + addNodeAndUpdate(p, MapNode(CONTENT_AIR), modified_blocks, true); } bool Map::addNodeWithEvent(v3s16 p, MapNode n, bool remove_metadata) @@ -211,24 +211,10 @@ public: std::set<v3s16> & light_sources, std::map<v3s16, MapBlock*> & modified_blocks); - void unLightNeighbors(enum LightBank bank, - v3s16 pos, u8 lightwas, - std::set<v3s16> & light_sources, - std::map<v3s16, MapBlock*> & modified_blocks); - void spreadLight(enum LightBank bank, std::set<v3s16> & from_nodes, std::map<v3s16, MapBlock*> & modified_blocks); - - void lightNeighbors(enum LightBank bank, - v3s16 pos, - std::map<v3s16, MapBlock*> & modified_blocks); - - v3s16 getBrightestNeighbour(enum LightBank bank, v3s16 p); - - s16 propagateSunlight(v3s16 start, - std::map<v3s16, MapBlock*> & modified_blocks); - + void updateLighting(enum LightBank bank, std::map<v3s16, MapBlock*> & a_blocks, std::map<v3s16, MapBlock*> & modified_blocks); diff --git a/src/mapnode.cpp b/src/mapnode.cpp index eba47446d..5efebf3d8 100644 --- a/src/mapnode.cpp +++ b/src/mapnode.cpp @@ -54,10 +54,10 @@ MapNode::MapNode(INodeDefManager *ndef, const std::string &name, param2 = a_param2; } -void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr) +void MapNode::setLight(enum LightBank bank, u8 a_light, const ContentFeatures &f) { // If node doesn't contain light data, ignore this - if(nodemgr->get(*this).param_type != CPT_LIGHT) + if(f.param_type != CPT_LIGHT) return; if(bank == LIGHTBANK_DAY) { @@ -73,6 +73,11 @@ void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr assert("Invalid light bank" == NULL); } +void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr) +{ + setLight(bank, a_light, nodemgr->get(*this)); +} + bool MapNode::isLightDayNightEq(INodeDefManager *nodemgr) const { const ContentFeatures &f = nodemgr->get(*this); @@ -103,6 +108,13 @@ u8 MapNode::getLight(enum LightBank bank, INodeDefManager *nodemgr) const return MYMAX(f.light_source, light); } +u8 MapNode::getLightRaw(enum LightBank bank, const ContentFeatures &f) const +{ + if(f.param_type == CPT_LIGHT) + return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f; + return 0; +} + u8 MapNode::getLightNoChecks(enum LightBank bank, const ContentFeatures *f) const { return MYMAX(f->light_source, diff --git a/src/mapnode.h b/src/mapnode.h index 2f6224f02..0bd61c554 100644 --- a/src/mapnode.h +++ b/src/mapnode.h @@ -191,6 +191,8 @@ struct MapNode param2 = p; } + void setLight(enum LightBank bank, u8 a_light, const ContentFeatures &f); + void setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr); /** @@ -202,6 +204,13 @@ struct MapNode u8 getLight(enum LightBank bank, INodeDefManager *nodemgr) const; + /*! + * Returns the node's light level from param1. + * If the node emits light, it is ignored. + * \param f the ContentFeatures of this node. + */ + u8 getLightRaw(enum LightBank bank, const ContentFeatures &f) const; + /** * This function differs from getLight(enum LightBank bank, INodeDefManager *nodemgr) * in that the ContentFeatures of the node in question are not retrieved by diff --git a/src/voxelalgorithms.cpp b/src/voxelalgorithms.cpp index f067a221a..019ec1bc6 100644 --- a/src/voxelalgorithms.cpp +++ b/src/voxelalgorithms.cpp @@ -19,6 +19,9 @@ with this program; if not, write to the Free Software Foundation, Inc., #include "voxelalgorithms.h" #include "nodedef.h" +#include "mapblock.h" +#include "map.h" +#include "util/timetaker.h" namespace voxalgo { @@ -153,5 +156,586 @@ SunlightPropagateResult propagateSunlight(VoxelManipulator &v, VoxelArea a, return SunlightPropagateResult(bottom_sunlight_valid); } +/*! + * A direction. + * 0=X+ + * 1=Y+ + * 2=Z+ + * 3=Z- + * 4=Y- + * 5=X- + * 6=no direction + * Two directions ate opposite only if their sum is 5. + */ +typedef u8 direction; +/*! + * Relative node position. + * This represents a node's position in its map block. + * All coordinates must be between 0 and 15. + */ +typedef v3s16 relative_v3; +/*! + * Position of a map block. + * One block_pos unit is as long as 16 node position units. + */ +typedef v3s16 mapblock_v3; + +//! Contains information about a node whose light is about to change. +struct ChangingLight { + //! Relative position of the node in its map block. + relative_v3 rel_position; + //! Position of the node's block. + mapblock_v3 block_position; + //! Reference to the node's block. + MapBlock *block; + /*! + * Direction from the node that caused this node's changing + * to this node. + */ + direction source_direction; + + ChangingLight() : + rel_position(), + block_position(), + block(NULL), + source_direction(6) + {} + + ChangingLight(relative_v3 rel_pos, mapblock_v3 block_pos, + MapBlock *b, direction source_dir) : + rel_position(rel_pos), + block_position(block_pos), + block(b), + source_direction(source_dir) + {} +}; + +/*! + * A fast, priority queue-like container to contain ChangingLights. + * The ChangingLights are ordered by the given light levels. + * The brightest ChangingLight is returned first. + */ +struct LightQueue { + //! For each light level there is a vector. + std::vector<ChangingLight> lights[LIGHT_SUN + 1]; + //! Light of the brightest ChangingLight in the queue. + u8 max_light; + + /*! + * Creates a LightQueue. + * \param reserve for each light level that many slots are reserved. + */ + LightQueue(size_t reserve) + { + max_light = LIGHT_SUN; + for (u8 i = 0; i <= LIGHT_SUN; i++) { + lights[i].reserve(reserve); + } + } + + /*! + * Returns the next brightest ChangingLight and + * removes it from the queue. + * If there were no elements in the queue, the given parameters + * remain unmodified. + * \param light light level of the popped ChangingLight + * \param data the ChangingLight that was popped + * \returns true if there was a ChangingLight in the queue. + */ + bool next(u8 &light, ChangingLight &data) + { + while (lights[max_light].empty()) { + if (max_light == 0) { + return false; + } + max_light--; + } + light = max_light; + data = lights[max_light].back(); + lights[max_light].pop_back(); + return true; + } + + /*! + * Adds an element to the queue. + * The parameters are the same as in ChangingLight's constructor. + * \param light light level of the ChangingLight + */ + inline void push(u8 light, relative_v3 &rel_pos, mapblock_v3 &block_pos, + MapBlock *block, direction source_dir) + { + lights[light].push_back( + ChangingLight(rel_pos, block_pos, block, source_dir)); + } +}; + +/*! + * This type of light queue is for unlighting. + * A node can be pushed in it only if its raw light is zero. + * This prevents pushing nodes twice into this queue. + * The light of the pushed ChangingLight must be the + * light of the node before unlighting it. + */ +typedef LightQueue UnlightQueue; +/*! + * This type of light queue is for spreading lights. + * While spreading lights, all the nodes in it must + * have the same light as the light level the ChangingLights + * were pushed into this queue with. This prevents unnecessary + * re-pushing of the nodes into the queue. + * If a node doesn't let light trough but emits light, it can be added + * too. + */ +typedef LightQueue ReLightQueue; + +/*! + * neighbor_dirs[i] points towards + * the direction i. + * See the definition of the type "direction" + */ +const static v3s16 neighbor_dirs[6] = { + v3s16(1, 0, 0), // right + v3s16(0, 1, 0), // top + v3s16(0, 0, 1), // back + v3s16(0, 0, -1), // front + v3s16(0, -1, 0), // bottom + v3s16(-1, 0, 0), // left +}; + +/*! + * Transforms the given map block offset by one node towards + * the specified direction. + * \param dir the direction of the transformation + * \param rel_pos the node's relative position in its map block + * \param block_pos position of the node's block + */ +bool stepRelBlockPos(direction dir, relative_v3 &rel_pos, + mapblock_v3 &block_pos) +{ + switch (dir) { + case 0: + if (rel_pos.X < MAP_BLOCKSIZE - 1) { + rel_pos.X++; + } else { + rel_pos.X = 0; + block_pos.X++; + return true; + } + break; + case 1: + if (rel_pos.Y < MAP_BLOCKSIZE - 1) { + rel_pos.Y++; + } else { + rel_pos.Y = 0; + block_pos.Y++; + return true; + } + break; + case 2: + if (rel_pos.Z < MAP_BLOCKSIZE - 1) { + rel_pos.Z++; + } else { + rel_pos.Z = 0; + block_pos.Z++; + return true; + } + break; + case 3: + if (rel_pos.Z > 0) { + rel_pos.Z--; + } else { + rel_pos.Z = MAP_BLOCKSIZE - 1; + block_pos.Z--; + return true; + } + break; + case 4: + if (rel_pos.Y > 0) { + rel_pos.Y--; + } else { + rel_pos.Y = MAP_BLOCKSIZE - 1; + block_pos.Y--; + return true; + } + break; + case 5: + if (rel_pos.X > 0) { + rel_pos.X--; + } else { + rel_pos.X = MAP_BLOCKSIZE - 1; + block_pos.X--; + return true; + } + break; + } + return false; +} + +/* + * Removes all light that is potentially emitted by the specified + * light sources. These nodes will have zero light. + * Returns all nodes whose light became zero but should be re-lighted. + * + * \param bank the light bank in which the procedure operates + * \param from_nodes nodes whose light is removed + * \param light_sources nodes that should be re-lighted + * \param modified_blocks output, all modified map blocks are added to this + */ +void unspreadLight(Map *map, INodeDefManager *nodemgr, LightBank bank, + UnlightQueue &from_nodes, ReLightQueue &light_sources, + std::map<v3s16, MapBlock*> & modified_blocks) +{ + // Stores data popped from from_nodes + u8 current_light; + ChangingLight current; + // Data of the current neighbor + mapblock_v3 neighbor_block_pos; + relative_v3 neighbor_rel_pos; + // A dummy boolean + bool is_valid_position; + // Direction of the brightest neighbor of the node + direction source_dir; + while (from_nodes.next(current_light, current)) { + // For all nodes that need unlighting + + // There is no brightest neighbor + source_dir = 6; + // The current node + const MapNode &node = current.block->getNodeNoCheck( + current.rel_position, &is_valid_position); + const ContentFeatures &f = nodemgr->get(node); + // If the node emits light, it behaves like it had a + // brighter neighbor. + u8 brightest_neighbor_light = f.light_source + 1; + for (direction i = 0; i < 6; i++) { + //For each neighbor + + // The node that changed this node has already zero light + // and it can't give light to this node + if (current.source_direction + i == 5) { + continue; + } + // Get the neighbor's position and block + neighbor_rel_pos = current.rel_position; + neighbor_block_pos = current.block_position; + MapBlock *neighbor_block; + if (stepRelBlockPos(i, neighbor_rel_pos, neighbor_block_pos)) { + neighbor_block = map->getBlockNoCreateNoEx(neighbor_block_pos); + if (neighbor_block == NULL) { + continue; + } + } else { + neighbor_block = current.block; + } + // Get the neighbor itself + MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos, + &is_valid_position); + const ContentFeatures &neighbor_f = nodemgr->get( + neighbor.getContent()); + u8 neighbor_light = neighbor.getLightRaw(bank, neighbor_f); + // If the neighbor has at least as much light as this node, then + // it won't lose its light, since it should have been added to + // from_nodes earlier, so its light would be zero. + if (neighbor_f.light_propagates && neighbor_light < current_light) { + // Unlight, but only if the node has light. + if (neighbor_light > 0) { + neighbor.setLight(bank, 0, neighbor_f); + neighbor_block->setNodeNoCheck(neighbor_rel_pos, neighbor); + from_nodes.push(neighbor_light, neighbor_rel_pos, + neighbor_block_pos, neighbor_block, i); + // The current node was modified earlier, so its block + // is in modified_blocks. + if (current.block != neighbor_block) { + modified_blocks[neighbor_block_pos] = neighbor_block; + } + } + } else { + // The neighbor can light up this node. + if (neighbor_light < neighbor_f.light_source) { + neighbor_light = neighbor_f.light_source; + } + if (brightest_neighbor_light < neighbor_light) { + brightest_neighbor_light = neighbor_light; + source_dir = i; + } + } + } + // If the brightest neighbor is able to light up this node, + // then add this node to the output nodes. + if (brightest_neighbor_light > 1 && f.light_propagates) { + brightest_neighbor_light--; + light_sources.push(brightest_neighbor_light, current.rel_position, + current.block_position, current.block, + (source_dir == 6) ? 6 : 5 - source_dir + /* with opposite direction*/); + } + } +} + +/* + * Spreads light from the specified starting nodes. + * + * Before calling this procedure, make sure that all ChangingLights + * in light_sources have as much light on the map as they have in + * light_sources (if the queue contains a node multiple times, the brightest + * occurrence counts). + * + * \param bank the light bank in which the procedure operates + * \param light_sources starting nodes + * \param modified_blocks output, all modified map blocks are added to this + */ +void spreadLight(Map *map, INodeDefManager *nodemgr, LightBank bank, + LightQueue & light_sources, std::map<v3s16, MapBlock*> & modified_blocks) +{ + // The light the current node can provide to its neighbors. + u8 spreading_light; + // The ChangingLight for the current node. + ChangingLight current; + // Position of the current neighbor. + mapblock_v3 neighbor_block_pos; + relative_v3 neighbor_rel_pos; + // A dummy boolean. + bool is_valid_position; + while (light_sources.next(spreading_light, current)) { + spreading_light--; + for (direction i = 0; i < 6; i++) { + // This node can't light up its light source + if (current.source_direction + i == 5) { + continue; + } + // Get the neighbor's position and block + neighbor_rel_pos = current.rel_position; + neighbor_block_pos = current.block_position; + MapBlock *neighbor_block; + if (stepRelBlockPos(i, neighbor_rel_pos, neighbor_block_pos)) { + neighbor_block = map->getBlockNoCreateNoEx(neighbor_block_pos); + if (neighbor_block == NULL) { + continue; + } + } else { + neighbor_block = current.block; + } + // Get the neighbor itself + MapNode neighbor = neighbor_block->getNodeNoCheck(neighbor_rel_pos, + &is_valid_position); + const ContentFeatures &f = nodemgr->get(neighbor.getContent()); + if (f.light_propagates) { + // Light up the neighbor, if it has less light than it should. + u8 neighbor_light = neighbor.getLightRaw(bank, f); + if (neighbor_light < spreading_light) { + neighbor.setLight(bank, spreading_light, f); + neighbor_block->setNodeNoCheck(neighbor_rel_pos, neighbor); + light_sources.push(spreading_light, neighbor_rel_pos, + neighbor_block_pos, neighbor_block, i); + // The current node was modified earlier, so its block + // is in modified_blocks. + if (current.block != neighbor_block) { + modified_blocks[neighbor_block_pos] = neighbor_block; + } + } + } + } + } +} + +/*! + * Returns true if the node gets sunlight from the + * node above it. + * + * \param pos position of the node. + */ +bool isSunlightAbove(Map *map, v3s16 pos, INodeDefManager *ndef) +{ + bool sunlight = true; + mapblock_v3 source_block_pos; + relative_v3 source_rel_pos; + getNodeBlockPosWithOffset(pos + v3s16(0, 1, 0), source_block_pos, + source_rel_pos); + // If the node above has sunlight, this node also can get it. + MapBlock *source_block = map->getBlockNoCreateNoEx(source_block_pos); + if (source_block == NULL) { + // But if there is no node above, then use heuristics + MapBlock *node_block = map->getBlockNoCreateNoEx(getNodeBlockPos(pos)); + if (node_block == NULL) { + sunlight = false; + } else { + sunlight = !node_block->getIsUnderground(); + } + } else { + bool is_valid_position; + MapNode above = source_block->getNodeNoCheck(source_rel_pos, + &is_valid_position); + if (is_valid_position) { + if (above.getContent() == CONTENT_IGNORE) { + // Trust heuristics + if (source_block->getIsUnderground()) { + sunlight = false; + } + } else if (above.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN) { + // If the node above doesn't have sunlight, this + // node is in shadow. + sunlight = false; + } + } + } + return sunlight; +} + +static const LightBank banks[] = { LIGHTBANK_DAY, LIGHTBANK_NIGHT }; + +void update_lighting_node(Map *map, INodeDefManager *ndef, v3s16 p, + MapNode oldnode, std::map<v3s16, MapBlock*> & modified_blocks) +{ + // For node getter functions + bool is_valid_position; + + // Get position and block of the changed node + relative_v3 rel_pos; + mapblock_v3 block_pos; + getNodeBlockPosWithOffset(p, block_pos, rel_pos); + MapBlock *block = map->getBlockNoCreateNoEx(block_pos); + if (block == NULL || block->isDummy()) { + return; + } + + // Process each light bank separately + for (s32 i = 0; i < 2; i++) { + // Get the new node + MapNode n = block->getNodeNoCheck(rel_pos, &is_valid_position); + if (!is_valid_position) { + break; + } + LightBank bank = banks[i]; + + // Light of the old node + u8 old_light = oldnode.getLight(bank, ndef); + + // Add the block of the added node to modified_blocks + modified_blocks[block_pos] = block; + + // Get new light level of the node + u8 new_light = 0; + if (ndef->get(n).light_propagates) { + if (bank == LIGHTBANK_DAY && ndef->get(n).sunlight_propagates + && isSunlightAbove(map, p, ndef)) { + new_light = LIGHT_SUN; + } else { + new_light = ndef->get(n).light_source; + for (int i = 0; i < 6; i++) { + v3s16 p2 = p + neighbor_dirs[i]; + bool is_valid; + MapNode n2 = map->getNodeNoEx(p2, &is_valid); + if (is_valid) { + u8 spread = n2.getLight(bank, ndef); + // If the neighbor is at least as bright as + // this node then its light is not from + // this node. + // Its light can spread to this node. + if (spread > new_light && spread >= old_light) { + new_light = spread - 1; + } + } + } + } + } else { + // If this is an opaque node, it still can emit light. + new_light = ndef->get(n).light_source; + } + + ReLightQueue light_sources(256); + + if (new_light > 0) { + light_sources.push(new_light, rel_pos, block_pos, block, 6); + } + + if (new_light < old_light) { + // The node became opaque or doesn't provide as much + // light as the previous one, so it must be unlighted. + LightQueue disappearing_lights(256); + + // Add to unlight queue + n.setLight(bank, 0, ndef); + block->setNodeNoCheck(rel_pos, n); + disappearing_lights.push(old_light, rel_pos, block_pos, block, 6); + + // Remove sunlight, if there was any + if (bank == LIGHTBANK_DAY && old_light == LIGHT_SUN) { + for (s16 y = p.Y - 1;; y--) { + v3s16 n2pos(p.X, y, p.Z); + + MapNode n2; + + n2 = map->getNodeNoEx(n2pos, &is_valid_position); + if (!is_valid_position) + break; + + // If this node doesn't have sunlight, the nodes below + // it don't have too. + if (n2.getLight(LIGHTBANK_DAY, ndef) != LIGHT_SUN) { + break; + } + // Remove sunlight and add to unlight queue. + n2.setLight(LIGHTBANK_DAY, 0, ndef); + map->setNode(n2pos, n2); + relative_v3 rel_pos2; + mapblock_v3 block_pos2; + getNodeBlockPosWithOffset(n2pos, block_pos2, rel_pos2); + MapBlock *block2 = map->getBlockNoCreateNoEx(block_pos2); + disappearing_lights.push(LIGHT_SUN, rel_pos2, block_pos2, + block2, 4 /* The node above caused the change */); + } + } + // Remove lights + unspreadLight(map, ndef, bank, disappearing_lights, light_sources, + modified_blocks); + } else if (new_light > old_light) { + // It is sure that the node provides more light than the previous + // one, unlighting is not necessary. + // Propagate sunlight + if (bank == LIGHTBANK_DAY && new_light == LIGHT_SUN) { + for (s16 y = p.Y - 1;; y--) { + v3s16 n2pos(p.X, y, p.Z); + + MapNode n2; + + n2 = map->getNodeNoEx(n2pos, &is_valid_position); + if (!is_valid_position) + break; + + // This should not happen, but if the node has sunlight + // then the iteration should stop. + if (n2.getLight(LIGHTBANK_DAY, ndef) == LIGHT_SUN) { + break; + } + // If the node terminates sunlight, stop. + if (!ndef->get(n2).sunlight_propagates) { + break; + } + relative_v3 rel_pos2; + mapblock_v3 block_pos2; + getNodeBlockPosWithOffset(n2pos, block_pos2, rel_pos2); + MapBlock *block2 = map->getBlockNoCreateNoEx(block_pos2); + // Mark node for lighting. + light_sources.push(LIGHT_SUN, rel_pos2, block_pos2, block2, + 4); + } + } + } + // Initialize light values for light spreading. + for (u8 i = 0; i <= LIGHT_SUN; i++) { + const std::vector<ChangingLight> &lights = light_sources.lights[i]; + for (std::vector<ChangingLight>::const_iterator it = lights.begin(); + it < lights.end(); it++) { + MapNode n = it->block->getNodeNoCheck(it->rel_position, + &is_valid_position); + n.setLight(bank, i, ndef); + it->block->setNodeNoCheck(it->rel_position, n); + } + } + // Spread lights. + spreadLight(map, ndef, bank, light_sources, modified_blocks); + } +} + } // namespace voxalgo diff --git a/src/voxelalgorithms.h b/src/voxelalgorithms.h index 2eba6a176..f2b2fde32 100644 --- a/src/voxelalgorithms.h +++ b/src/voxelalgorithms.h @@ -25,6 +25,9 @@ with this program; if not, write to the Free Software Foundation, Inc., #include <set> #include <map> +class Map; +class MapBlock; + namespace voxalgo { @@ -52,6 +55,23 @@ SunlightPropagateResult propagateSunlight(VoxelManipulator &v, VoxelArea a, std::set<v3s16> & light_sources, INodeDefManager *ndef); +/*! + * Updates the lighting on the map. + * The result will be correct only if + * no nodes were changed except the given one. + * + * \param p position of the changed node + * \param oldnode this node was overwritten on the map + * \param modified_blocks output, contains all map blocks that + * the function modified + */ +void update_lighting_node( + Map *map, + INodeDefManager *ndef, + v3s16 p, + MapNode oldnode, + std::map<v3s16, MapBlock*> &modified_blocks); + } // namespace voxalgo #endif |