A third try on terrain generation. No trees yet.

src/client.cpp

@@ -510,6 +510,10 @@ void Client::ProcessData(u8 *data, u32 datasize, u16 sender_peer_id)
 			assert(player != NULL);
 			player->setPosition(playerpos_f);
 		}
+
+		// Get map seed
+		m_map_seed = readU64(&data[2+1+6]);
+		dstream<<"Client: received map seed: "<<m_map_seed<<std::endl;
 		
 		// Reply to server
 		u32 replysize = 2;

src/client.h

@@ -252,6 +252,8 @@ public:
 				(std::wstring)L"<"+name+L"> "+message);
 	}
 
+	u64 getMapSeed(){ return m_map_seed; }
+
 private:
 	
 	// Virtual methods from con::PeerHandler
@@ -311,6 +313,9 @@ private:
 	//u32 m_daynight_ratio;
 
 	Queue<std::wstring> m_chat_queue;
+	
+	// The seed returned by the server in TOCLIENT_INIT is stored here
+	u64 m_map_seed;
 };
 
 #endif // !SERVER

src/clientserver.h

@@ -34,6 +34,7 @@ enum ToClientCommand
 		[0] u16 TOSERVER_INIT
 		[2] u8 deployed version
 		[3] v3s16 player's position + v3f(0,BS/2,0) floatToInt'd
+		[4] u64 map seed (new as of 2011-02-27)
 	*/
 
 	TOCLIENT_BLOCKDATA = 0x20, //TODO: Multiple blocks

src/main.cpp

@@ -253,11 +253,9 @@ Doing now (most important at the top):
 * not done
 
 === Next
-* Continue making the scripting system:
-  * Make updateNodeMesh for a less verbose mesh update on add/removenode
-  * Switch to using a safe way for the self and env pointers
-  * Make some global environment hooks, like node placed and general
-    on_step()
+* Make a system for pregenerating quick information for mapblocks, so
+  that the client can show them as cubes before they are actually sent
+  or even generated.
 
 === Fixmes
 * Check the fixmes in the list above
@@ -274,6 +272,11 @@ Doing now (most important at the top):
   with the ones in utility.h
 
 === Features
+* Continue making the scripting system:
+  * Make updateNodeMesh for a less verbose mesh update on add/removenode
+  * Switch to using a safe way for the self and env pointers
+  * Make some global environment hooks, like node placed and general
+    on_step()
 * Map should make the appropriate MapEditEvents
 * Add a global Lua spawn handler and such
 * Get rid of MapBlockObjects
@@ -490,6 +493,9 @@ Inventory local_inventory;
 
 u16 g_selected_item = 0;
 
+bool g_show_map_plot = false;
+bool g_refresh_map_plot = true;
+
 /*
 	Debug streams
 */
@@ -606,6 +612,15 @@ public:
 			if(event.KeyInput.PressedDown)
 			{
 				//dstream<<"Pressed key: "<<(char)event.KeyInput.Key<<std::endl;
+				if(g_show_map_plot)
+				{
+					if(event.KeyInput.Key == irr::KEY_ESCAPE
+						|| event.KeyInput.Key == irr::KEY_KEY_M)
+					{
+						g_show_map_plot = false;
+					}
+					return true;
+				}
 				
 				/*
 					Launch menus
@@ -679,6 +694,16 @@ public:
 							<<std::endl;
 					debug_stacks_print();
 				}
+
+				// Map plot
+				if(event.KeyInput.Key == irr::KEY_KEY_M)
+				{
+					dstream<<"Map plot requested"<<std::endl;
+					g_show_map_plot = !g_show_map_plot;
+					if(g_show_map_plot)
+						g_refresh_map_plot = true;
+				}
+				
 			}
 		}
 
@@ -1110,8 +1135,8 @@ void updateViewingRange(f32 frametime_in, Client *client)
 	f32 wanted_frametime_change = wanted_frametime - frametime;
 	//dstream<<"wanted_frametime_change="<<wanted_frametime_change<<std::endl;
 	
-	// If needed frametime change is very small, just return
-	if(fabs(wanted_frametime_change) < wanted_frametime*0.2)
+	// If needed frametime change is small, just return
+	if(fabs(wanted_frametime_change) < wanted_frametime*0.4)
 	{
 		//dstream<<"ignoring small wanted_frametime_change"<<std::endl;
 		return;
@@ -1239,6 +1264,93 @@ void draw_hotbar(video::IVideoDriver *driver, gui::IGUIFont *font,
 	}
 }
 
+video::ITexture *g_map_plot_texture = NULL;
+float g_map_plot_texture_scale = 2;
+
+void updateMapPlotTexture(v2f centerpos, video::IVideoDriver* driver,
+		Client *client)
+{
+	assert(driver);
+	assert(client);
+
+	core::dimension2d<u32> dim(640,480);
+	video::IImage *img = driver->createImage(video::ECF_A8R8G8B8, dim);
+	assert(img);
+	for(u32 y=0; y<dim.Height; y++)
+	for(u32 x=0; x<dim.Width; x++)
+	{
+		v2f pf = v2f(x, dim.Height-y) - v2f(dim.Width, dim.Height)/2;
+		pf *= g_map_plot_texture_scale;
+		pf += centerpos;
+		double h = base_rock_level_2d(client->getMapSeed(), pf);
+		video::SColor c;
+		//double d1 = 50;
+		/*s32 ux = x - centerpos.X / g_map_plot_texture_scale;
+		s32 uy = y - centerpos.Y / g_map_plot_texture_scale;*/
+			
+		// Screen coordinates that are based on multiples of
+		// 1000/g_map_plot_texture_scale and never negative
+		u32 ux = x + (u32)(1000/g_map_plot_texture_scale) * 10;
+		u32 uy = y + (u32)(1000/g_map_plot_texture_scale) * 10;
+		// Offset to center of image
+		ux -= dim.Width/2;
+		uy -= dim.Height/2;
+
+		if(uy % (u32)(1000/g_map_plot_texture_scale) == 0
+				|| ux % (u32)(1000/g_map_plot_texture_scale) == 0)
+			c.set(255, 255, 255, 255);
+		else if(uy % (u32)(100/g_map_plot_texture_scale) == 0
+				|| ux % (u32)(100/g_map_plot_texture_scale) == 0)
+			c.set(255, 160, 160, 160);
+		else if(h < WATER_LEVEL - 0.5) // Water
+			c.set(255, 50, 50, 255);
+		else if(h < WATER_LEVEL + 2) // Sand
+			c.set(255, 237, 201, 175);
+#if 1
+		else if(h < WATER_LEVEL + 10) // Green
+			c.set(255, 50, 150, 50);
+		else if(h < WATER_LEVEL + 20) // Greenish yellow
+			c.set(255, 110, 185, 50);
+		else if(h < WATER_LEVEL + 50) // Yellow
+			c.set(255, 220, 220, 50);
+		else if(h < WATER_LEVEL + 100) // White
+			c.set(255, 180, 180, 180);
+		else
+			c.set(255, 255, 255, 255);
+#endif
+		/*else if(h < WATER_LEVEL + d1)
+		{
+			h -= WATER_LEVEL;
+			u32 a = (u32)(h / d1 * 255);
+			if(a > 255)
+				a = 255;
+			c.set(255, 0, a, 0);
+		}*/
+#if 0
+		else
+		{
+			h -= WATER_LEVEL;
+			h /= 20.0;
+			h = 1.0 - exp(-h);
+
+			video::SColor c1(255,200,200,50);
+			video::SColor c2(255,0,150,0);
+			c = c1.getInterpolated(c2, h);
+
+			/*u32 a = (u32)(h*255);
+			if(a > 255)
+				a = 255;
+			a = 255-a;
+			c.set(255, a, a, a);*/
+		}
+#endif
+		img->setPixel(x, y, c);
+	}
+	g_map_plot_texture = driver->addTexture("map_plot", img);
+	img->drop();
+	assert(g_map_plot_texture);
+}
+
 // Chat data
 struct ChatLine
 {
@@ -2252,6 +2364,10 @@ int main(int argc, char *argv[])
 		*/
 		g_input->step(dtime);
 
+		/*
+			Misc. stuff
+		*/
+
 		/*
 			Player speed control
 		*/
@@ -3020,16 +3136,6 @@ int main(int argc, char *argv[])
 			driver->draw3DBox(*i, video::SColor(255,0,0,0));
 		}
 
-		/*
-			Draw crosshair
-		*/
-		driver->draw2DLine(displaycenter - core::vector2d<s32>(10,0),
-				displaycenter + core::vector2d<s32>(10,0),
-				video::SColor(255,255,255,255));
-		driver->draw2DLine(displaycenter - core::vector2d<s32>(0,10),
-				displaycenter + core::vector2d<s32>(0,10),
-				video::SColor(255,255,255,255));
-
 		/*
 			Frametime log
 		*/
@@ -3048,6 +3154,31 @@ int main(int argc, char *argv[])
 			}
 		}
 
+		/*
+			Draw map plot
+		*/
+		if(g_show_map_plot && g_map_plot_texture)
+		{
+			core::dimension2d<u32> drawdim(640,480);
+			core::rect<s32> dest(v2s32(0,0), drawdim);
+			dest += v2s32(
+				(screensize.X-drawdim.Width)/2,
+				(screensize.Y-drawdim.Height)/2
+			);
+			core::rect<s32> source(v2s32(0,0), g_map_plot_texture->getSize());
+			driver->draw2DImage(g_map_plot_texture, dest, source);
+		}
+
+		/*
+			Draw crosshair
+		*/
+		driver->draw2DLine(displaycenter - core::vector2d<s32>(10,0),
+				displaycenter + core::vector2d<s32>(10,0),
+				video::SColor(255,255,255,255));
+		driver->draw2DLine(displaycenter - core::vector2d<s32>(0,10),
+				displaycenter + core::vector2d<s32>(0,10),
+				video::SColor(255,255,255,255));
+
 		} // timer
 
 		//timer10.stop();
@@ -3077,8 +3208,23 @@ int main(int argc, char *argv[])
 		drawtime = drawtimer.stop(true);
 
 		/*
-			Drawing ends
+			End of drawing
 		*/
+
+		/*
+			Refresh map plot if player has moved considerably
+		*/
+		if(g_refresh_map_plot)
+		{
+			static v3f old_player_pos = v3f(1,1,1) * 10000000;
+			v3f p = client.getPlayerPosition() / BS;
+			if(old_player_pos.getDistanceFrom(p) > 4 * g_map_plot_texture_scale)
+			{
+				updateMapPlotTexture(v2f(p.X,p.Z), driver, &client);
+				old_player_pos = p;
+			}
+			g_refresh_map_plot = false;
+		}
 		
 		static s16 lastFPS = 0;
 		//u16 fps = driver->getFPS();

src/map.h

@@ -40,6 +40,15 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "voxel.h"
 #include "mapchunk.h"
 
+/*
+	Some exposed functions
+*/
+
+double base_rock_level_2d(u64 seed, v2f p);
+
+/*
+*/
+
 #define MAPTYPE_BASE 0
 #define MAPTYPE_SERVER 1
 #define MAPTYPE_CLIENT 2
@@ -531,6 +540,8 @@ public:
 
 	bool isSavingEnabled(){ return m_map_saving_enabled; }
 
+	u64 getSeed(){ return m_seed; }
+
 private:
 	// Seed used for all kinds of randomness
 	u64 m_seed;

src/mapblock.cpp

@@ -34,6 +34,7 @@ MapBlock::MapBlock(NodeContainer *parent, v3s16 pos, bool dummy):
 		m_pos(pos),
 		changed(true),
 		is_underground(false),
+		m_lighting_expired(true),
 		m_day_night_differs(false),
 		m_objects(this)
 {

src/noise.cpp

@@ -92,8 +92,7 @@ double noise3d(int x, int y, int z, int seed)
 	return 1.0 - (double)n/1073741824;
 }
 
-#if 0
-// This is too slow
+#if 1
 double noise2d_gradient(double x, double y, int seed)
 {
 	// Calculate the integer coordinates
@@ -118,7 +117,7 @@ double noise2d_gradient(double x, double y, int seed)
 }
 #endif
 
-#if 1
+#if 0
 double noise2d_gradient(double x, double y, int seed)
 {
 	// Calculate the integer coordinates
@@ -175,6 +174,21 @@ double noise2d_perlin(double x, double y, int seed,
 	return a;
 }
 
+double noise2d_perlin_abs(double x, double y, int seed,
+		int octaves, double persistence)
+{
+	double a = 0;
+	double f = 1.0;
+	double g = 1.0;
+	for(int i=0; i<octaves; i++)
+	{
+		a += g * fabs(noise2d_gradient(x*f, y*f, seed+i));
+		f *= 2.0;
+		g *= persistence;
+	}
+	return a;
+}
+
 double noise3d_perlin(double x, double y, double z, int seed,
 		int octaves, double persistence)
 {
@@ -190,3 +204,18 @@ double noise3d_perlin(double x, double y, double z, int seed,
 	return a;
 }
 
+double noise3d_perlin_abs(double x, double y, double z, int seed,
+		int octaves, double persistence)
+{
+	double a = 0;
+	double f = 1.0;
+	double g = 1.0;
+	for(int i=0; i<octaves; i++)
+	{
+		a += g * fabs(noise3d_gradient(x*f, y*f, z*f, seed+i));
+		f *= 2.0;
+		g *= persistence;
+	}
+	return a;
+}
+

src/noise.h

@@ -32,8 +32,14 @@ double noise3d_gradient(double x, double y, double z, int seed);
 double noise2d_perlin(double x, double y, int seed,
 		int octaves, double persistence);
 
+double noise2d_perlin_abs(double x, double y, int seed,
+		int octaves, double persistence);
+
 double noise3d_perlin(double x, double y, double z, int seed,
 		int octaves, double persistence);
 
+double noise3d_perlin_abs(double x, double y, double z, int seed,
+		int octaves, double persistence);
+
 #endif
 

src/server.cpp

@@ -167,6 +167,26 @@ void * EmergeThread::Thread()
 						only_from_disk,
 						changed_blocks,
 						lighting_invalidated_blocks);
+				
+				/*
+					While we're at it, generate some other blocks too
+				*/
+				try
+				{
+					map.emergeBlock(
+							p+v3s16(0,1,0),
+							only_from_disk,
+							changed_blocks,
+							lighting_invalidated_blocks);
+					map.emergeBlock(
+							p+v3s16(0,-1,0),
+							only_from_disk,
+							changed_blocks,
+							lighting_invalidated_blocks);
+				}
+				catch(InvalidPositionException &e)
+				{
+				}
 			}
 
 			// If it is a dummy, block was not found on disk
@@ -208,23 +228,25 @@ void * EmergeThread::Thread()
 				Collect a list of blocks that have been modified in
 				addition to the fetched one.
 			*/
-
-			// Add all the "changed blocks" to modified_blocks
+			
+			if(lighting_invalidated_blocks.size() > 0)
+				dstream<<"lighting "<<lighting_invalidated_blocks.size()
+						<<" blocks"<<std::endl;
+			
+			// 50-100ms for single block generation
+			//TimeTaker timer("** EmergeThread updateLighting");
+			
+			// Update lighting without locking the environment mutex,
+			// add modified blocks to changed blocks
+			map.updateLighting(lighting_invalidated_blocks, modified_blocks);
+			
+			// Add all from changed_blocks to modified_blocks
 			for(core::map<v3s16, MapBlock*>::Iterator i = changed_blocks.getIterator();
 					i.atEnd() == false; i++)
 			{
 				MapBlock *block = i.getNode()->getValue();
 				modified_blocks.insert(block->getPos(), block);
 			}
-			
-			/*dstream<<"lighting "<<lighting_invalidated_blocks.size()
-					<<" blocks"<<std::endl;*/
-			
-			//TimeTaker timer("** updateLighting");
-			
-			// Update lighting without locking the environment mutex,
-			// add modified blocks to changed blocks
-			map.updateLighting(lighting_invalidated_blocks, modified_blocks);
 		}
 		// If we got no block, there should be no invalidated blocks
 		else
@@ -551,7 +573,8 @@ void RemoteClient::GetNextBlocks(Server *server, float dtime,
 			{
 				//TODO: Get value from somewhere
 				// Allow only one block in emerge queue
-				if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
+				//if(server->m_emerge_queue.peerItemCount(peer_id) < 1)
+				if(server->m_emerge_queue.peerItemCount(peer_id) < 2)
 				{
 					//dstream<<"Adding block to emerge queue"<<std::endl;
 					
@@ -1681,10 +1704,11 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 
 		// Now answer with a TOCLIENT_INIT
 		
-		SharedBuffer<u8> reply(2+1+6);
+		SharedBuffer<u8> reply(2+1+6+8);
 		writeU16(&reply[0], TOCLIENT_INIT);
 		writeU8(&reply[2], deployed);
-		writeV3S16(&reply[3], floatToInt(player->getPosition()+v3f(0,BS/2,0), BS));
+		writeV3S16(&reply[2+1], floatToInt(player->getPosition()+v3f(0,BS/2,0), BS));
+		writeU64(&reply[2+1+6], m_env.getServerMap().getSeed());
 		// Send as reliable
 		m_con.Send(peer_id, 0, reply, true);
 

src/tile.cpp

@@ -486,7 +486,7 @@ void TextureSource::buildMainAtlas()
 	sourcelist.push_back("sand.png^mineral_iron.png");
 	
 	// Padding to disallow texture bleeding
-	s32 padding = 8;
+	s32 padding = 16;
 
 	/*
 		First pass: generate almost everything

src/utility.h

@@ -39,6 +39,18 @@ extern const v3s16 g_26dirs[26];
 // 26th is (0,0,0)
 extern const v3s16 g_27dirs[27];
 
+inline void writeU64(u8 *data, u64 i)
+{
+	data[0] = ((i>>56)&0xff);
+	data[1] = ((i>>48)&0xff);
+	data[2] = ((i>>40)&0xff);
+	data[3] = ((i>>32)&0xff);
+	data[4] = ((i>>24)&0xff);
+	data[5] = ((i>>16)&0xff);
+	data[6] = ((i>> 8)&0xff);
+	data[7] = ((i>> 0)&0xff);
+}
+
 inline void writeU32(u8 *data, u32 i)
 {
 	data[0] = ((i>>24)&0xff);
@@ -58,6 +70,14 @@ inline void writeU8(u8 *data, u8 i)
 	data[0] = ((i>> 0)&0xff);
 }
 
+inline u64 readU64(u8 *data)
+{
+	return ((u64)data[0]<<56) | ((u64)data[1]<<48)
+		| ((u64)data[2]<<40) | ((u64)data[3]<<32)
+		| ((u64)data[4]<<24) | ((u64)data[5]<<16)
+		| ((u64)data[6]<<8) | ((u64)data[7]<<0);
+}
+
 inline u32 readU32(u8 *data)
 {
 	return (data[0]<<24) | (data[1]<<16) | (data[2]<<8) | (data[3]<<0);