-void VoxelManipulator::unspreadLight(enum LightBank bank, v3s16 p, u8 oldlight,
- std::set<v3s16> & light_sources, INodeDefManager *nodemgr)
-{
- 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
- };
-
- VoxelArea voxel_area(p - v3s16(1,1,1), p + v3s16(1,1,1));
- addArea(voxel_area);
-
- // Loop through 6 neighbors
- for(u16 i=0; i<6; i++)
- {
- // Get the position of the neighbor node
- v3s16 n2pos = p + dirs[i];
-
- u32 n2i = m_area.index(n2pos);
-
- if(m_flags[n2i] & VOXELFLAG_NO_DATA)
- continue;
-
- MapNode &n2 = m_data[n2i];
-
- /*
- If the neighbor is dimmer than what was specified
- as oldlight (the light of the previous node)
- */
- u8 light2 = n2.getLight(bank, nodemgr);
- if(light2 < oldlight)
- {
- /*
- And the neighbor is transparent and it has some light
- */
- if(nodemgr->get(n2).light_propagates && light2 != 0)
- {
- /*
- Set light to 0 and add to queue
- */
-
- n2.setLight(bank, 0, nodemgr);
-
- unspreadLight(bank, n2pos, light2, light_sources, nodemgr);
-
- /*
- Remove from light_sources if it is there
- NOTE: This doesn't happen nearly at all
- */
- /*if(light_sources.find(n2pos))
- {
- std::cout<<"Removed from light_sources"<<std::endl;
- light_sources.remove(n2pos);
- }*/
- }
- }
- else{
- light_sources.insert(n2pos);
- }
- }
-}
-
-/*
- Goes recursively through the neighbours of the node.
-
- Alters only transparent nodes.
-
- If the lighting of the neighbour is lower than the lighting of
- the node was (before changing it to 0 at the step before), the
- lighting of the neighbour is set to 0 and then the same stuff
- repeats for the neighbour.
-
- The ending nodes of the routine are stored in light_sources.
- This is useful when a light is removed. In such case, this
- routine can be called for the light node and then again for
- light_sources to re-light the area without the removed light.
-
- values of from_nodes are lighting values.
-*/
-void VoxelManipulator::unspreadLight(enum LightBank bank,
- std::map<v3s16, u8> & from_nodes,
- std::set<v3s16> & light_sources, INodeDefManager *nodemgr)
-{
- if(from_nodes.empty())
- return;
-
- for(std::map<v3s16, u8>::iterator j = from_nodes.begin();
- j != from_nodes.end(); ++j)
- {
- unspreadLight(bank, j->first, j->second, light_sources, nodemgr);
- }
-}
-
-void VoxelManipulator::spreadLight(enum LightBank bank, v3s16 p,
- INodeDefManager *nodemgr)
-{
- const 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
- };
-
- VoxelArea voxel_area(p - v3s16(1,1,1), p + v3s16(1,1,1));
- addArea(voxel_area);
-
- u32 i = m_area.index(p);
-
- if(m_flags[i] & VOXELFLAG_NO_DATA)
- return;
-
- MapNode &n = m_data[i];
-
- u8 oldlight = n.getLight(bank, nodemgr);
- u8 newlight = diminish_light(oldlight);
-
- // Loop through 6 neighbors
- for(u16 i=0; i<6; i++)
- {
- // Get the position of the neighbor node
- v3s16 n2pos = p + dirs[i];
-
- u32 n2i = m_area.index(n2pos);
-
- if(m_flags[n2i] & VOXELFLAG_NO_DATA)
- continue;
-
- MapNode &n2 = m_data[n2i];
-
- u8 light2 = n2.getLight(bank, nodemgr);
-
- /*
- If the neighbor is brighter than the current node,
- add to list (it will light up this node on its turn)
- */
- if(light2 > undiminish_light(oldlight))
- {
- spreadLight(bank, n2pos, nodemgr);
- }
- /*
- If the neighbor is dimmer than how much light this node
- would spread on it, add to list
- */
- if(light2 < newlight)
- {
- if(nodemgr->get(n2).light_propagates)
- {
- n2.setLight(bank, newlight, nodemgr);
- spreadLight(bank, n2pos, nodemgr);
- }
- }
- }
-}
-
-