Fix Y-slices with num_emerge_threads > 1

src/mapgen/mapgen.cpp

@@ -769,6 +769,22 @@ void MapgenBasic::generateBiomes()
 }
 
 
+void MapgenBasic::removeOvergeneratedCStone()
+{
+	for (s16 z = node_min.Z; z <= node_max.Z; z++)
+	for (s16 x = node_min.X; x <= node_max.X; x++) {
+		u32 vi = vm->m_area.index(x, node_max.Y + 1, z); // top
+		if (vm->m_data[vi].getContent() == c_stone) {
+			vm->m_data[vi].setContent(CONTENT_IGNORE);
+		}
+		vi = vm->m_area.index(x, node_min.Y - 1, z);     // bottom
+		if (vm->m_data[vi].getContent() == c_stone) {
+			vm->m_data[vi].setContent(CONTENT_IGNORE);
+		}
+	}
+}
+
+
 void MapgenBasic::dustTopNodes()
 {
 	if (node_max.Y < water_level)
@@ -955,7 +971,6 @@ void MapgenBasic::generateDungeons(s16 max_stone_y)
 	dgen.generate(vm, blockseed, full_node_min, full_node_max);
 }
 
-
 ////
 //// GenerateNotifier
 ////

src/mapgen/mapgen.h

@@ -289,6 +289,7 @@ class MapgenBasic : public Mapgen {
 	virtual void generateCavesRandomWalk(s16 max_stone_y, s16 large_cave_ymax);
 	virtual bool generateCavernsNoise(s16 max_stone_y);
 	virtual void generateDungeons(s16 max_stone_y);
+	virtual void removeOvergeneratedCStone();
 
 protected:
 	BiomeManager *m_bmgr;

src/mapgen/mapgen_carpathian.cpp

@@ -318,6 +318,8 @@ void MapgenCarpathian::makeChunk(BlockMakeData *data)
 				full_node_min, full_node_max);
 	}
 
+	removeOvergeneratedCStone();
+
 	this->generating = false;
 }
 

src/mapgen/mapgen_flat.cpp

@@ -268,6 +268,8 @@ void MapgenFlat::makeChunk(BlockMakeData *data)
 	//setLighting(node_min - v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 	//			node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE, 0xFF);
 
+	removeOvergeneratedCStone();
+
 	this->generating = false;
 }
 

src/mapgen/mapgen_fractal.cpp

@@ -263,6 +263,8 @@ void MapgenFractal::makeChunk(BlockMakeData *data)
 		calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 			full_node_min, full_node_max);
 
+	removeOvergeneratedCStone();
+
 	this->generating = false;
 
 	//printf("makeChunk: %lums\n", t.stop());

src/mapgen/mapgen_v5.cpp

@@ -262,6 +262,8 @@ void MapgenV5::makeChunk(BlockMakeData *data)
 			full_node_min, full_node_max);
 	}
 
+	removeOvergeneratedCStone();
+
 	this->generating = false;
 }
 

src/mapgen/mapgen_v6.cpp

@@ -620,10 +620,27 @@ void MapgenV6::makeChunk(BlockMakeData *data)
 		calcLighting(node_min - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
 			node_max + v3s16(1, 0, 1) * MAP_BLOCKSIZE,
 			full_node_min, full_node_max);
+
+	removeOvergeneratedCStone();
 
 	this->generating = false;
 }
 
+void MapgenV6::removeOvergeneratedCStone()
+{
+	for (s16 z = node_min.Z; z <= node_max.Z; z++)
+	for (s16 x = node_min.X; x <= node_max.X; x++) {
+		u32 vi = vm->m_area.index(x, node_max.Y + 1, z); // top
+		if (vm->m_data[vi].getContent() == c_stone) {
+			vm->m_data[vi].setContent(CONTENT_IGNORE);
+		}
+		vi = vm->m_area.index(x, node_min.Y - 1, z);     // bottom
+		if (vm->m_data[vi].getContent() == c_stone) {
+			vm->m_data[vi].setContent(CONTENT_IGNORE);
+		}
+	}
+}
+
 
 void MapgenV6::calculateNoise()
 {

src/mapgen/mapgen_v6.h

@@ -125,6 +125,7 @@ class MapgenV6 : public Mapgen {
 	void makeChunk(BlockMakeData *data);
 	int getGroundLevelAtPoint(v2s16 p);
 	int getSpawnLevelAtPoint(v2s16 p);
+	virtual void removeOvergeneratedCStone();
 
 	float baseTerrainLevel(float terrain_base, float terrain_higher,
 		float steepness, float height_select);

src/mapgen/mapgen_v7.cpp

@@ -379,6 +379,8 @@ void MapgenV7::makeChunk(BlockMakeData *data)
 		calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 			full_node_min, full_node_max, propagate_shadow);
 
+	removeOvergeneratedCStone();
+
 	this->generating = false;
 
 	//printf("makeChunk: %lums\n", t.stop());

src/mapgen/mapgen_valleys.cpp

@@ -271,6 +271,8 @@ void MapgenValleys::makeChunk(BlockMakeData *data)
 		calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
 			full_node_min, full_node_max);
 
+	removeOvergeneratedCStone();
+
 	this->generating = false;
 
 	//printf("makeChunk: %lums\n", t.stop());