This map generator is starting to look pretty good now... also, disabled loading player position from disk because map is regenerated always.

src/environment.cpp

@@ -112,6 +112,7 @@ void Environment::step(float dtime)
 			{
 				// Apply gravity to local player
 				v3f speed = player->getSpeed();
+				if(player->swimming_up == false)
 					speed.Y -= 9.81 * BS * dtime_part * 2;
 
 				/*

src/main.cpp

@@ -333,6 +333,19 @@ Doing now:
 * Make the generator to run in background and not blocking block
   placement and transfer
 * Fix the strange mineral occurences
+* When the map is generated and a place is found for the player, the
+  first chunk is actually still volatile and will have stuff still
+  changed after spawning, which creates a lot of glitches.
+  - This is partly fixed by now allowing only 2-sector deeep
+    modification of volatile chunks. But it should still be fixed?
+  - How about checking that the neighbors are fully generated too and
+    generate them when the middle piece is needed
+	- This is very slow
+  - How about just enabling changed_blocks properly
+    - This is probably a good idea
+    - The server has to make sure the spawn point is not at the
+	  changing borders of a chunk
+* Add some kind of erosion and other stuff that now is possible
 
 ======================================================================
 
@@ -2690,8 +2703,7 @@ int main(int argc, char *argv[])
 						}
 						// We want a slight delay to very little
 						// time consuming nodes
-						//float mindelay = 0.15;
+						float mindelay = 0.15;
-						float mindelay = 0.20;
 						if(nodig_delay_counter < mindelay)
 						{
 							nodig_delay_counter = mindelay;

src/map.h

@@ -100,7 +100,9 @@ public:
 		This is overloaded by ClientMap and ServerMap to allow
 		their differing fetch methods.
 	*/
-	virtual MapSector * emergeSector(v2s16 p) = 0;
+	virtual MapSector * emergeSector(v2s16 p){ return NULL; }
+	virtual MapSector * emergeSector(v2s16 p,
+			core::map<v3s16, MapBlock*> &changed_blocks){ return NULL; }
 
 	// Returns InvalidPositionException if not found
 	MapBlock * getBlockNoCreate(v3s16 p);
@@ -364,22 +366,42 @@ public:
 		return n->getValue();
 	}
 
+	/*
+		True if the chunk and its neighbors are fully generated.
+		It means the chunk will not be touched in the future by the
+		generator. If false, generateChunk will make it true.
+	*/
+	bool chunkNonVolatile(v2s16 chunkpos)
+	{
+		/*for(s16 x=-1; x<=1; x++)
+		for(s16 y=-1; y<=1; y++)*/
+		s16 x=0;
+		s16 y=0;
+		{
+			v2s16 chunkpos0 = chunkpos + v2s16(x,y);
+			MapChunk *chunk = getChunk(chunkpos);
+			if(chunk == NULL)
+				return false;
+			if(chunk->getGenLevel() != GENERATED_FULLY)
+				return false;
+		}
+		return true;
+	}
+
 	/*
 		Generate a chunk.
 
 		All chunks touching this one can be altered also.
-
-		Doesn't update lighting.
 	*/
-	MapChunk* generateChunkRaw(v2s16 chunkpos);
+	MapChunk* generateChunkRaw(v2s16 chunkpos,
+			core::map<v3s16, MapBlock*> &changed_blocks);
 	
 	/*
 		Generate a chunk and its neighbors so that it won't be touched
 		anymore.
-
-		Doesn't update lighting.
 	*/
-	MapChunk* generateChunk(v2s16 chunkpos);
+	MapChunk* generateChunk(v2s16 chunkpos,
+			core::map<v3s16, MapBlock*> &changed_blocks);
 	
 	/*
 		Generate a sector.
@@ -402,7 +424,14 @@ public:
 		- Check disk (loads blocks also)
 		- Generate chunk
 	*/
-	MapSector * emergeSector(v2s16 p);
+	MapSector * emergeSector(v2s16 p,
+			core::map<v3s16, MapBlock*> &changed_blocks);
+	
+	MapSector * emergeSector(v2s16 p)
+	{
+		core::map<v3s16, MapBlock*> changed_blocks;
+		return emergeSector(p, changed_blocks);
+	}
 
 	MapBlock * generateBlock(
 			v3s16 p,
@@ -419,6 +448,10 @@ public:
 	*/
 	MapBlock * createBlock(v3s16 p);
 	
+	/*
+		only_from_disk, changed_blocks and lighting_invalidated_blocks
+		are not properly used by the new map generator.
+	*/
 	MapBlock * emergeBlock(
 			v3s16 p,
 			bool only_from_disk,

src/mapblock.cpp

@@ -700,6 +700,9 @@ void MapBlock::updateMesh(u32 daynight_ratio)
 			const u16 indices[] = {0,1,2,2,3,0};
 
 			video::ITexture *texture = g_irrlicht->getTexture(f.tile.spec);
+			if(texture == NULL)
+				continue;
+
 			material.setTexture(0, texture);
 			if(f.tile.alpha != 255)
 				material.MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;

src/mapchunk.h

@@ -22,14 +22,21 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 /*
 	MapChunk contains map-generation-time metadata for an area of
-	some MapSectors. (something like 64x64)
+	some MapSectors. (something like 16x16)
 */
 
+enum{
+	GENERATED_FULLY = 0,
+	GENERATED_PARTLY = 10,
+	GENERATED_NOT = 20
+};
+
 class MapChunk
 {
 public:
 	MapChunk():
-		m_is_volatile(true)
+		//m_is_volatile(true)
+		m_generation_level(GENERATED_NOT)
 	{
 	}
 
@@ -40,11 +47,21 @@ public:
 		It is set to false when all the 8 neighboring chunks have
 		been generated.
 	*/
-	bool getIsVolatile(){ return m_is_volatile; }
+	/*bool getIsVolatile(){ return m_is_volatile; }
-	void setIsVolatile(bool is){ m_is_volatile = is; }
+	void setIsVolatile(bool is){ m_is_volatile = is; }*/
+	
+	/*
+		Generation level. Possible values:
+		GENERATED_FULLY = 0 = fully generated
+		GENERATED_PARTLY = partly generated
+		GENERATED_NOT = not generated
+	*/
+	u16 getGenLevel(){ return m_generation_level; }
+	void setGenLevel(u16 lev){ m_generation_level = lev; }
 
 private:
-	bool m_is_volatile;
+	//bool m_is_volatile;
+	u16 m_generation_level;
 };
 
 #endif

src/mapnode.cpp

@@ -82,6 +82,9 @@ void init_mapnode(IIrrlichtWrapper *irrlicht)
 	i = CONTENT_TREE;
 	f = &g_content_features[i];
 	f->setAllTextures(irrlicht->getTextureId("tree.png"));
+	f->setTexture(0, irrlicht->getTextureId("tree_top.png"));
+	f->setTexture(1, irrlicht->getTextureId("tree_top.png"));
+	f->setInventoryTexture(irrlicht->getTextureId("tree_top.png"));
 	f->param_type = CPT_MINERAL;
 	f->is_ground_content = true;
 	

src/player.cpp

@@ -428,6 +428,9 @@ void LocalPlayer::move(f32 dtime, Map &map)
 
 void LocalPlayer::applyControl(float dtime)
 {
+	// Clear stuff
+	swimming_up = false;
+
 	// Random constants
 #define WALK_ACCELERATION (4.0 * BS)
 #define WALKSPEED_MAX (4.0 * BS)
@@ -510,6 +513,7 @@ void LocalPlayer::applyControl(float dtime)
 			v3f speed = getSpeed();
 			speed.Y = 2.0*BS;
 			setSpeed(speed);
+			swimming_up = true;
 		}
 	}
 

src/player.h

@@ -115,6 +115,7 @@ public:
 
 	bool touching_ground;
 	bool in_water;
+	bool swimming_up;
 	
 	Inventory inventory;
 

src/server.cpp

@@ -515,9 +515,13 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 					generate = false;
 			}
 
+#if 0
 			/*
 				If block is far away, don't generate it unless it is
 				near ground level
+
+				NOTE: We can't know the ground level this way with the
+				new generator.
 			*/
 			if(d > 4)
 			{
@@ -543,6 +547,7 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 						generate = false;
 				}
 			}
+#endif
 
 			/*
 				Don't draw if not in sight
@@ -610,11 +615,13 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 				v2s16 p2d(p.X, p.Z);
 				ServerMap *map = (ServerMap*)(&server->m_env.getMap());
 				v2s16 chunkpos = map->sector_to_chunk(p2d);
-				MapChunk *chunk = map->getChunk(chunkpos);
+				if(map->chunkNonVolatile(chunkpos) == false)
+					block_is_invalid = true;
+				/*MapChunk *chunk = map->getChunk(chunkpos);
 				if(chunk == NULL)
 					block_is_invalid = true;
 				else if(chunk->getIsVolatile() == true)
-					block_is_invalid = true;
+					block_is_invalid = true;*/
 			}
 
 			/*
@@ -3176,6 +3183,16 @@ Player *Server::emergePlayer(const char *name, const char *password,
 			setCreativeInventory(player);
 		}
 
+		/*
+			With new map generator the map is regenerated anyway,
+			so start at somewhere where you probably don't get underground
+		*/
+		player->setPosition(intToFloat(v3s16(
+				0,
+				50,
+				0
+		)));
+		
 		return player;
 	}
 
@@ -3206,9 +3223,17 @@ Player *Server::emergePlayer(const char *name, const char *password,
 		dstream<<"Server: Finding spawn place for player \""
 				<<player->getName()<<"\""<<std::endl;
 
-#if 1
 		v2s16 nodepos;
 		f32 groundheight = 0;
+#if 1
+		player->setPosition(intToFloat(v3s16(
+				0,
+				50,
+				0
+		)));
+#endif
+#if 0
+#if 0
 		// Try to find a good place a few times
 		for(s32 i=0; i<500; i++)
 		{
@@ -3271,6 +3296,7 @@ Player *Server::emergePlayer(const char *name, const char *password,
 				groundheight + 15,
 				nodepos.Y
 		)));
+#endif
 
 		/*
 			Add player to environment

src/utility.h

@@ -1474,8 +1474,11 @@ void mysrand(unsigned seed);
 
 inline int myrand_range(int min, int max)
 {
-	if(min >= max)
+	if(min > max)
+	{
+		assert(0);
 		return max;
+	}
 	return (myrand()%(max-min+1))+min;
 }