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Faster lighting at map generation time
This commit is contained in:
Perttu Ahola
parent
87554408ca
commit
3909e712a0
8 changed files with 605 additions and 33 deletions
389
src/voxel.cpp
389
src/voxel.cpp
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@ -264,6 +264,395 @@ void VoxelManipulator::clearFlag(u8 flags)
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<<volume<<" nodes"<<std::endl;*/
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}
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void VoxelManipulator::unspreadLight(enum LightBank bank, v3s16 p, u8 oldlight,
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core::map<v3s16, bool> & light_sources)
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{
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v3s16 dirs[6] = {
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v3s16(0,0,1), // back
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v3s16(0,1,0), // top
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v3s16(1,0,0), // right
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v3s16(0,0,-1), // front
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v3s16(0,-1,0), // bottom
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v3s16(-1,0,0), // left
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};
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emerge(VoxelArea(p - v3s16(1,1,1), p + v3s16(1,1,1)));
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// Loop through 6 neighbors
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for(u16 i=0; i<6; i++)
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{
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// Get the position of the neighbor node
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v3s16 n2pos = p + dirs[i];
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u32 n2i = m_area.index(n2pos);
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if(m_flags[n2i] & VOXELFLAG_INEXISTENT)
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continue;
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MapNode &n2 = m_data[n2i];
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/*
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If the neighbor is dimmer than what was specified
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as oldlight (the light of the previous node)
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*/
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if(n2.getLight(bank) < oldlight)
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{
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/*
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And the neighbor is transparent and it has some light
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*/
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if(n2.light_propagates() && n2.getLight(bank) != 0)
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{
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/*
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Set light to 0 and add to queue
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*/
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u8 current_light = n2.getLight(bank);
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n2.setLight(bank, 0);
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unspreadLight(bank, n2pos, current_light, light_sources);
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/*
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Remove from light_sources if it is there
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NOTE: This doesn't happen nearly at all
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*/
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/*if(light_sources.find(n2pos))
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{
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std::cout<<"Removed from light_sources"<<std::endl;
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light_sources.remove(n2pos);
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}*/
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}
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}
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else{
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light_sources.insert(n2pos, true);
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}
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}
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}
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#if 1
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/*
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Goes recursively through the neighbours of the node.
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Alters only transparent nodes.
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If the lighting of the neighbour is lower than the lighting of
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the node was (before changing it to 0 at the step before), the
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lighting of the neighbour is set to 0 and then the same stuff
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repeats for the neighbour.
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The ending nodes of the routine are stored in light_sources.
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This is useful when a light is removed. In such case, this
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routine can be called for the light node and then again for
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light_sources to re-light the area without the removed light.
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values of from_nodes are lighting values.
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*/
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void VoxelManipulator::unspreadLight(enum LightBank bank,
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core::map<v3s16, u8> & from_nodes,
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core::map<v3s16, bool> & light_sources)
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{
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if(from_nodes.size() == 0)
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return;
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core::map<v3s16, u8>::Iterator j;
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j = from_nodes.getIterator();
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for(; j.atEnd() == false; j++)
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{
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v3s16 pos = j.getNode()->getKey();
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//MapNode &n = m_data[m_area.index(pos)];
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u8 oldlight = j.getNode()->getValue();
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unspreadLight(bank, pos, oldlight, light_sources);
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}
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}
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#endif
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#if 0
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/*
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Goes recursively through the neighbours of the node.
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Alters only transparent nodes.
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If the lighting of the neighbour is lower than the lighting of
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the node was (before changing it to 0 at the step before), the
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lighting of the neighbour is set to 0 and then the same stuff
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repeats for the neighbour.
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The ending nodes of the routine are stored in light_sources.
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This is useful when a light is removed. In such case, this
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routine can be called for the light node and then again for
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light_sources to re-light the area without the removed light.
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values of from_nodes are lighting values.
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*/
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void VoxelManipulator::unspreadLight(enum LightBank bank,
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core::map<v3s16, u8> & from_nodes,
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core::map<v3s16, bool> & light_sources)
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{
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v3s16 dirs[6] = {
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v3s16(0,0,1), // back
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v3s16(0,1,0), // top
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v3s16(1,0,0), // right
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v3s16(0,0,-1), // front
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v3s16(0,-1,0), // bottom
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v3s16(-1,0,0), // left
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};
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if(from_nodes.size() == 0)
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return;
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core::map<v3s16, u8> unlighted_nodes;
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core::map<v3s16, u8>::Iterator j;
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j = from_nodes.getIterator();
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for(; j.atEnd() == false; j++)
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{
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v3s16 pos = j.getNode()->getKey();
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emerge(VoxelArea(pos - v3s16(1,1,1), pos + v3s16(1,1,1)));
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//MapNode &n = m_data[m_area.index(pos)];
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u8 oldlight = j.getNode()->getValue();
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// Loop through 6 neighbors
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for(u16 i=0; i<6; i++)
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{
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// Get the position of the neighbor node
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v3s16 n2pos = pos + dirs[i];
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u32 n2i = m_area.index(n2pos);
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if(m_flags[n2i] & VOXELFLAG_INEXISTENT)
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continue;
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MapNode &n2 = m_data[n2i];
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/*
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If the neighbor is dimmer than what was specified
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as oldlight (the light of the previous node)
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*/
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if(n2.getLight(bank) < oldlight)
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{
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/*
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And the neighbor is transparent and it has some light
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*/
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if(n2.light_propagates() && n2.getLight(bank) != 0)
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{
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/*
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Set light to 0 and add to queue
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*/
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u8 current_light = n2.getLight(bank);
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n2.setLight(bank, 0);
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unlighted_nodes.insert(n2pos, current_light);
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/*
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Remove from light_sources if it is there
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NOTE: This doesn't happen nearly at all
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*/
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/*if(light_sources.find(n2pos))
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{
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std::cout<<"Removed from light_sources"<<std::endl;
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light_sources.remove(n2pos);
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}*/
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}
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}
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else{
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light_sources.insert(n2pos, true);
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}
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}
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}
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/*dstream<<"unspreadLight(): Changed block "
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<<blockchangecount<<" times"
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<<" for "<<from_nodes.size()<<" nodes"
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<<std::endl;*/
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if(unlighted_nodes.size() > 0)
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unspreadLight(bank, unlighted_nodes, light_sources);
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}
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#endif
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void VoxelManipulator::spreadLight(enum LightBank bank, v3s16 p)
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{
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const v3s16 dirs[6] = {
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v3s16(0,0,1), // back
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v3s16(0,1,0), // top
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v3s16(1,0,0), // right
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v3s16(0,0,-1), // front
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v3s16(0,-1,0), // bottom
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v3s16(-1,0,0), // left
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};
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emerge(VoxelArea(p - v3s16(1,1,1), p + v3s16(1,1,1)));
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u32 i = m_area.index(p);
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if(m_flags[i] & VOXELFLAG_INEXISTENT)
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return;
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MapNode &n = m_data[i];
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u8 oldlight = n.getLight(bank);
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u8 newlight = diminish_light(oldlight);
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// Loop through 6 neighbors
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for(u16 i=0; i<6; i++)
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{
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// Get the position of the neighbor node
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v3s16 n2pos = p + dirs[i];
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u32 n2i = m_area.index(n2pos);
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if(m_flags[n2i] & VOXELFLAG_INEXISTENT)
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continue;
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MapNode &n2 = m_data[n2i];
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/*
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If the neighbor is brighter than the current node,
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add to list (it will light up this node on its turn)
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*/
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if(n2.getLight(bank) > undiminish_light(oldlight))
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{
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spreadLight(bank, n2pos);
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}
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/*
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If the neighbor is dimmer than how much light this node
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would spread on it, add to list
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*/
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if(n2.getLight(bank) < newlight)
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{
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if(n2.light_propagates())
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{
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n2.setLight(bank, newlight);
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spreadLight(bank, n2pos);
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}
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}
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}
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}
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#if 1
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/*
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Lights neighbors of from_nodes, collects all them and then
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goes on recursively.
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*/
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void VoxelManipulator::spreadLight(enum LightBank bank,
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core::map<v3s16, bool> & from_nodes)
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{
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if(from_nodes.size() == 0)
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return;
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core::map<v3s16, bool> lighted_nodes;
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core::map<v3s16, bool>::Iterator j;
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j = from_nodes.getIterator();
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for(; j.atEnd() == false; j++)
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{
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v3s16 pos = j.getNode()->getKey();
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spreadLight(bank, pos);
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}
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}
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#endif
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#if 0
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/*
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Lights neighbors of from_nodes, collects all them and then
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goes on recursively.
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*/
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void VoxelManipulator::spreadLight(enum LightBank bank,
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core::map<v3s16, bool> & from_nodes)
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{
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const v3s16 dirs[6] = {
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v3s16(0,0,1), // back
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v3s16(0,1,0), // top
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v3s16(1,0,0), // right
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v3s16(0,0,-1), // front
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v3s16(0,-1,0), // bottom
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v3s16(-1,0,0), // left
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};
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if(from_nodes.size() == 0)
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return;
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core::map<v3s16, bool> lighted_nodes;
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core::map<v3s16, bool>::Iterator j;
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j = from_nodes.getIterator();
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for(; j.atEnd() == false; j++)
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{
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v3s16 pos = j.getNode()->getKey();
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emerge(VoxelArea(pos - v3s16(1,1,1), pos + v3s16(1,1,1)));
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u32 i = m_area.index(pos);
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if(m_flags[i] & VOXELFLAG_INEXISTENT)
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continue;
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MapNode &n = m_data[i];
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u8 oldlight = n.getLight(bank);
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u8 newlight = diminish_light(oldlight);
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// Loop through 6 neighbors
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for(u16 i=0; i<6; i++)
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{
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// Get the position of the neighbor node
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v3s16 n2pos = pos + dirs[i];
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try
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{
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u32 n2i = m_area.index(n2pos);
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if(m_flags[n2i] & VOXELFLAG_INEXISTENT)
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continue;
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MapNode &n2 = m_data[n2i];
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/*
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If the neighbor is brighter than the current node,
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add to list (it will light up this node on its turn)
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*/
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if(n2.getLight(bank) > undiminish_light(oldlight))
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{
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lighted_nodes.insert(n2pos, true);
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}
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/*
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If the neighbor is dimmer than how much light this node
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would spread on it, add to list
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*/
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if(n2.getLight(bank) < newlight)
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{
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if(n2.light_propagates())
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{
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n2.setLight(bank, newlight);
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lighted_nodes.insert(n2pos, true);
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}
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}
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}
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catch(InvalidPositionException &e)
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{
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continue;
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}
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}
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}
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/*dstream<<"spreadLight(): Changed block "
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<<blockchangecount<<" times"
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<<" for "<<from_nodes.size()<<" nodes"
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<<std::endl;*/
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if(lighted_nodes.size() > 0)
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spreadLight(bank, lighted_nodes);
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}
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#endif
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#if 0
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int VoxelManipulator::getWaterPressure(v3s16 p, s16 &highest_y, int recur_count)
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{
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