From 8cb7badd632200e06004577f351b9c845c174e29 Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Fri, 27 Jan 2012 14:10:10 +0200
Subject: [PATCH] Do post-mapgen lighting using the VoxelManipulator-based
 functions (causes glitches currently)

---
 src/map.cpp    | 11 +++++++++--
 src/mapgen.cpp | 28 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/src/map.cpp b/src/map.cpp
index 1ab2b32a..2625cbad 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -2076,10 +2076,13 @@ void ServerMap::initBlockMake(mapgen::BlockMakeData *data, v3s16 blockpos)
 				<<"("<<blockpos.X<<","<<blockpos.Y<<","<<blockpos.Z<<")"
 				<<std::endl;
 	
-	s16 chunksize = 2;
-	v3s16 blockpos_div = getContainerPos(blockpos, chunksize);
+	s16 chunksize = 3;
+	v3s16 chunk_offset(-1,-1,-1);
+	v3s16 blockpos_div = getContainerPos(blockpos - chunk_offset, chunksize);
 	v3s16 blockpos_min = blockpos_div * chunksize;
 	v3s16 blockpos_max = blockpos_div * chunksize + v3s16(1,1,1)*(chunksize-1);
+	blockpos_min += chunk_offset;
+	blockpos_max += chunk_offset;
 	
 	// Do nothing if not inside limits (+-1 because of neighbors)
 	if(blockpos_over_limit(blockpos_min - v3s16(1,1,1)) ||
@@ -2223,6 +2226,7 @@ MapBlock* ServerMap::finishBlockMake(mapgen::BlockMakeData *data,
 		Update lighting
 	*/
 	{
+#if 0
 		TimeTaker t("finishBlockMake lighting update");
 
 		core::map<v3s16, MapBlock*> lighting_update_blocks;
@@ -2239,6 +2243,7 @@ MapBlock* ServerMap::finishBlockMake(mapgen::BlockMakeData *data,
 		}
 
 		updateLighting(lighting_update_blocks, changed_blocks);
+#endif
 		
 		/*
 			Set lighting to non-expired state in all of them.
@@ -2253,8 +2258,10 @@ MapBlock* ServerMap::finishBlockMake(mapgen::BlockMakeData *data,
 			getBlockNoCreateNoEx(p)->setLightingExpired(false);
 		}
 
+#if 0
 		if(enable_mapgen_debug_info == false)
 			t.stop(true); // Hide output
+#endif
 	}
 
 	// Center blocks
diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index 25fa427a..0ce211f3 100644
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -27,6 +27,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "nodedef.h"
 #include "content_mapnode.h" // For content_mapnode_get_new_name
 #include "voxelalgorithms.h"
+#include "profiler.h"
+#include "main.h" // For g_profiler
 
 namespace mapgen
 {
@@ -2339,7 +2341,33 @@ void make_block(BlockMakeData *data)
 	/*
 		Calculate lighting
 	*/
+	{
+	ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update",
+			SPT_AVG);
+	VoxelArea a(node_min, node_max);
+	enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
+	for(int i=0; i<2; i++)
+	{
+		enum LightBank bank = banks[i];
 
+		core::map<v3s16, bool> light_sources;
+		core::map<v3s16, u8> unlight_from;
+
+		voxalgo::clearLightAndCollectSources(vmanip, a, bank, ndef,
+				light_sources, unlight_from);
+		
+		// TODO: Get this from elsewhere
+		bool inexistent_top_provides_sunlight = true;
+		voxalgo::SunlightPropagateResult res = voxalgo::propagateSunlight(
+				vmanip, a, inexistent_top_provides_sunlight,
+				light_sources, ndef);
+		// TODO: Do stuff according to bottom_sunlight_valid
+
+		vmanip.unspreadLight(bank, unlight_from, light_sources, ndef);
+
+		vmanip.spreadLight(bank, light_sources, ndef);
+	}
+	}
 }
 
 BlockMakeData::BlockMakeData():