better water

src/constants.h

@@ -85,5 +85,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 #define MAX_OBJECTDATA_SIZE 450
 
+//#define WATER_LEVEL (-5)
+#define WATER_LEVEL (0)
+
 #endif
 

src/environment.cpp

@@ -101,11 +101,28 @@ void Environment::step(float dtime)
 		{
 			Player *player = *i;
 			
-			// Apply gravity to local player
+			// Apply physics to local player
 			if(player->isLocal())
 			{
+				// Apply gravity to local player
 				v3f speed = player->getSpeed();
 				speed.Y -= 9.81 * BS * dtime_part * 2;
+
+				/*
+					Apply water resistance
+				*/
+				if(player->in_water)
+				{
+					f32 max_down = 1.0*BS;
+					if(speed.Y < -max_down) speed.Y = -max_down;
+
+					f32 max = 2.0*BS;
+					if(speed.getLength() > max)
+					{
+						speed = speed / speed.getLength() * max;
+					}
+				}
+
 				player->setSpeed(speed);
 			}
 

src/main.cpp

@@ -167,6 +167,12 @@ TODO: Check what goes wrong with caching map to disk (Kray)
 
 TODO: Remove LazyMeshUpdater. It is not used as supposed.
 
+FIXME: Rats somehow go underground sometimes (you can see it in water)
+       - Does their position get saved to a border value or something?
+
+TODO: MovingObject::move and Player::move are basically the same.
+      combine them.
+
 Doing now:
 ======================================================================
 
@@ -1013,6 +1019,19 @@ int main(int argc, char *argv[])
 	*/
 
 	std::cout<<std::endl<<std::endl;
+	
+	std::cout
+	<<"        .__               __                   __   "<<std::endl
+	<<"  _____ |__| ____   _____/  |_  ____   _______/  |_ "<<std::endl
+	<<" /     \\|  |/    \\_/ __ \\   __\\/ __ \\ /  ___/\\   __\\"<<std::endl
+	<<"|  Y Y  \\  |   |  \\  ___/|  | \\  ___/ \\___ \\  |  |  "<<std::endl
+	<<"|__|_|  /__|___|  /\\___  >__|  \\___  >____  > |__|  "<<std::endl
+	<<"      \\/        \\/     \\/          \\/     \\/        "<<std::endl
+	<<std::endl
+	<<"Now with more waterish water!"
+	<<std::endl;
+
+	std::cout<<std::endl;
 	char templine[100];
 	
 	// Dedicated?
@@ -1830,9 +1849,8 @@ int main(int argc, char *argv[])
 		for(s16 x = xstart; x <= xend; x++)
 		{
 			try{
-				if(client.getNode(v3s16(x,y,z)).d == MATERIAL_AIR){
+				if(material_pointable(client.getNode(v3s16(x,y,z)).d) == false)
 					continue;
-				}
 			}catch(InvalidPositionException &e){
 				continue;
 			}

src/map.cpp

@@ -1047,6 +1047,66 @@ void Map::removeNodeAndUpdate(v3s16 p,
 	
 	v3s16 toppos = p + v3s16(0,1,0);
 
+	// Node will be replaced with this
+	u8 replace_material = MATERIAL_AIR;
+	
+	{
+		/*
+			Find out with what material the node will be replaced.
+			It will be replaced with the mostly seen buildable_to.
+		*/
+
+		v3s16 dirs[6] = {
+			v3s16(0,0,1), // back
+			v3s16(0,1,0), // top
+			v3s16(1,0,0), // right
+			v3s16(0,0,-1), // front
+			v3s16(0,-1,0), // bottom
+			v3s16(-1,0,0), // left
+		};
+
+		core::map<u8, u16> neighbor_rankings;
+		
+		for(u32 i=0; i<sizeof(dirs)/sizeof(dirs[0]); i++)
+		{
+			try{
+				MapNode n2 = getNode(p + dirs[i]);
+
+				if(material_buildable_to(n2.d))
+				{
+					if(neighbor_rankings.find(n2.d) == NULL)
+						neighbor_rankings[n2.d] = 1;
+					else
+						neighbor_rankings[n2.d]
+							= neighbor_rankings[n2.d] + 1;
+				}
+			}
+			catch(InvalidPositionException &e)
+			{
+			}
+		}
+
+		u16 highest_ranking = 0;
+		
+		for(core::map<u8, u16>::Iterator
+				i = neighbor_rankings.getIterator();
+				i.atEnd() == false; i++)
+		{
+			u8 m = i.getNode()->getKey();
+			u8 c = i.getNode()->getValue();
+			if(
+					c > highest_ranking ||
+					// Prefer something else than air
+					(c >= highest_ranking && m != MATERIAL_AIR)
+
+			)
+			{
+				replace_material = m;
+				highest_ranking = c;
+			}
+		}
+	}
+
 	/*
 		If there is a node at top and it doesn't have sunlight,
 		there will be no sunlight going down.
@@ -1073,7 +1133,7 @@ void Map::removeNodeAndUpdate(v3s16 p,
 		Remove the node
 	*/
 	MapNode n;
-	n.d = MATERIAL_AIR;
+	n.d = replace_material;
 	n.setLight(0);
 	setNode(p, n);
 	

src/mapblockobject.cpp

@@ -145,9 +145,9 @@ void MovingObject::move(float dtime, v3f acceleration)
 		for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 		{
 			try{
-				if(m_block->getNodeParent(v3s16(x,y,z)).d == MATERIAL_AIR){
+				if(material_walkable(m_block->getNodeParent(v3s16(x,y,z)).d)
+						== false)
 					continue;
-				}
 			}
 			catch(InvalidPositionException &e)
 			{

src/mapnode.h

@@ -133,6 +133,34 @@ inline u8 material_solidness(u8 m)
 	return 2;
 }
 
+// Objects collide with walkable materials
+inline bool material_walkable(u8 m)
+{
+	return (m != MATERIAL_AIR && m != MATERIAL_WATER);
+}
+
+// A liquid resists fast movement
+inline bool material_liquid(u8 m)
+{
+	return (m == MATERIAL_WATER);
+}
+
+// Pointable materials can be pointed to in the map
+inline bool material_pointable(u8 m)
+{
+	return (m != MATERIAL_AIR && m != MATERIAL_WATER);
+}
+
+inline bool material_diggable(u8 m)
+{
+	return (m != MATERIAL_AIR && m != MATERIAL_WATER);
+}
+
+inline bool material_buildable_to(u8 m)
+{
+	return (m == MATERIAL_AIR || m == MATERIAL_WATER);
+}
+
 /*
 	Nodes make a face if materials differ and solidness differs.
 	Return value:

src/mapsector.h

@@ -34,8 +34,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 	This is an Y-wise stack of MapBlocks.
 */
 
-#define WATER_LEVEL (-5)
-
 #define SECTOR_OBJECT_TEST 0
 #define SECTOR_OBJECT_TREE_1 1
 #define SECTOR_OBJECT_BUSH_1 2

src/player.cpp

@@ -28,6 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 Player::Player():
 	touching_ground(false),
+	in_water(false),
 	inventory(PLAYER_INVENTORY_SIZE),
 	peer_id(PEER_ID_NEW),
 	m_speed(0,0,0),
@@ -64,6 +65,26 @@ void Player::move(f32 dtime, Map &map)
 
 	v3s16 pos_i = floatToInt(position);
 	
+	/*
+		Check if player is in water
+	*/
+	try{
+		if(in_water)
+		{
+			v3s16 pp = floatToInt(position + v3f(0,0,0));
+			in_water = material_liquid(map.getNode(pp).d);
+		}
+		else
+		{
+			v3s16 pp = floatToInt(position + v3f(0,BS/2,0));
+			in_water = material_liquid(map.getNode(pp).d);
+		}
+	}
+	catch(InvalidPositionException &e)
+	{
+		in_water = false;
+	}
+
 	// The frame length is limited to the player going 0.1*BS per call
 	f32 d = (float)BS * 0.15;
 
@@ -100,10 +121,8 @@ void Player::move(f32 dtime, Map &map)
 	for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++){
 		for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++){
 			for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++){
-				//std::cout<<"with ("<<x<<","<<y<<","<<z<<"): ";
 				try{
-					if(map.getNode(v3s16(x,y,z)).d == MATERIAL_AIR){
-						//std::cout<<"air."<<std::endl;
+					if(material_walkable(map.getNode(v3s16(x,y,z)).d) == false){
 						continue;
 					}
 				}
@@ -355,11 +374,18 @@ void LocalPlayer::applyControl(float dtime)
 	}
 	if(control.jump)
 	{
-		if(touching_ground){
+		if(touching_ground)
+		{
 			v3f speed = getSpeed();
 			speed.Y = 6.5*BS;
 			setSpeed(speed);
 		}
+		else if(in_water)
+		{
+			v3f speed = getSpeed();
+			speed.Y = 2.0*BS;
+			setSpeed(speed);
+		}
 	}
 
 	// The speed of the player (Y is ignored)

src/player.h

@@ -95,6 +95,7 @@ public:
 	virtual bool isLocal() const = 0;
 
 	bool touching_ground;
+	bool in_water;
 	
 	Inventory inventory;
 

src/server.cpp

@@ -1419,8 +1419,8 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 			{
 				// Get material at position
 				material = m_env.getMap().getNode(p_under).d;
-				// If it's air, do nothing
-				if(material == MATERIAL_AIR)
+				// If it's not diggable, do nothing
+				if(material_diggable(material) == false)
 				{
 					return;
 				}
@@ -1484,9 +1484,9 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
 				n.d = mitem->getMaterial();
 
 				try{
-					// Don't add a node if there isn't air
+					// Don't add a node if this is not a free space
 					MapNode n2 = m_env.getMap().getNode(p_over);
-					if(n2.d != MATERIAL_AIR)
+					if(material_buildable_to(n2.d) == false)
 						return;
 				}
 				catch(InvalidPositionException &e)