From 735fc2a1f25eed78460c02867a4960fbf1e66a72 Mon Sep 17 00:00:00 2001
From: Dániel Juhász <juhdanad@gmail.com>
Date: Sun, 4 Feb 2018 04:16:45 +0100
Subject: Remove unused light updating code

Also remove the unit test that tests the removed algorithms.
---
 src/voxel.cpp | 188 ----------------------------------------------------------
 1 file changed, 188 deletions(-)

(limited to 'src/voxel.cpp')

diff --git a/src/voxel.cpp b/src/voxel.cpp
index cd638183c..b901c1c4f 100644
--- a/src/voxel.cpp
+++ b/src/voxel.cpp
@@ -315,194 +315,6 @@ void VoxelManipulator::clearFlag(u8 flags)
 			<<volume<<" nodes"<<std::endl;*/
 }
 
-void VoxelManipulator::unspreadLight(enum LightBank bank, v3s16 p, u8 oldlight,
-		std::set<v3s16> & light_sources, INodeDefManager *nodemgr)
-{
-	VoxelArea voxel_area(p - v3s16(1,1,1), p + v3s16(1,1,1));
-	addArea(voxel_area);
-
-	// Loop through 6 neighbors
-	for (const v3s16 &dir : g_6dirs) {
-		// Get the position of the neighbor node
-		v3s16 n2pos = p + dir;
-
-		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);
-		}
-	}
-}
-
-void VoxelManipulator::spreadLight(enum LightBank bank, v3s16 p,
-		INodeDefManager *nodemgr)
-{
-	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 (const auto &dir : g_6dirs) {
-		// Get the position of the neighbor node
-		v3s16 n2pos = p + dir;
-
-		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);
-			}
-		}
-	}
-}
-
-
 const MapNode VoxelManipulator::ContentIgnoreNode = MapNode(CONTENT_IGNORE);
 
-/*
-	Lights neighbors of from_nodes, collects all them and then
-	goes on recursively.
-*/
-void VoxelManipulator::spreadLight(enum LightBank bank,
-		std::set<v3s16> & from_nodes, INodeDefManager *nodemgr)
-{
-	if(from_nodes.empty())
-		return;
-
-	std::set<v3s16> lighted_nodes;
-
-	for (const v3s16 &pos : from_nodes) {
-		VoxelArea voxel_area(pos - v3s16(1,1,1), pos + v3s16(1,1,1));
-		addArea(voxel_area);
-
-		u32 i = m_area.index(pos);
-
-		if(m_flags[i] & VOXELFLAG_NO_DATA)
-			continue;
-
-		MapNode &n = m_data[i];
-
-		u8 oldlight = n.getLight(bank, nodemgr);
-		u8 newlight = diminish_light(oldlight);
-
-		// Loop through 6 neighbors
-		for (const v3s16 &dir : g_6dirs) {
-			// Get the position of the neighbor node
-			v3s16 n2pos = pos + dir;
-
-			try
-			{
-				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))
-				{
-					lighted_nodes.insert(n2pos);
-				}
-				/*
-					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);
-						lighted_nodes.insert(n2pos);
-					}
-				}
-			}
-			catch(InvalidPositionException &e)
-			{
-				continue;
-			}
-		}
-	}
-
-	/*dstream<<"spreadLight(): Changed block "
-			<<blockchangecount<<" times"
-			<<" for "<<from_nodes.size()<<" nodes"
-			<<std::endl;*/
-
-	if(!lighted_nodes.empty())
-		spreadLight(bank, lighted_nodes, nodemgr);
-}
-
 //END
-- 
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