Grass tiles have regained the ability to disappear under blocks

- Test:Grass now (again) randomly disappears under opaque blocks
- Fixed a truly egregious bug in AbstractContextRO.pop()
- Fixed BlockContext.pushRelative(AbsRelation)
- Some changes in toString methods in contexts

src/main/java/ru/windcorp/progressia/common/world/context/BlockDataContext.java

@@ -46,7 +46,7 @@ public interface BlockDataContext
 	
 	@Override
 	default BlockDataContext pushRelative(AbsRelation direction) {
-		return push(direction.getVector());
+		return push(getLocation().add_(direction.getVector()));
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/common/world/context/BlockDataContextRO.java

@@ -45,7 +45,7 @@ public interface BlockDataContextRO
 	
 	@Override
 	default BlockDataContextRO pushRelative(AbsRelation direction) {
-		return push(direction.getVector());
+		return push(getLocation().add_(direction.getVector()));
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/common/world/generic/context/AbstractContextRO.java

@@ -58,7 +58,8 @@ public abstract class AbstractContextRO<
 			throw new IllegalStateException("Cannot pop(): already top frame");
 		}
 
-		frame = frameStack.pop();
+		frameStack.pop();
+		frame = frameStack.peek();
 	}
 
 	@Override

src/main/java/ru/windcorp/progressia/common/world/generic/context/BlockGenericContextRO.java

@@ -149,7 +149,7 @@ public interface BlockGenericContextRO<
 	
 	@Override
 	default BlockGenericContextRO<B, T, E> pushRelative(AbsRelation direction) {
-		return push(direction.getVector());
+		return push(getLocation().add_(direction.getVector()));
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/common/world/generic/context/BlockGenericContextWO.java

@@ -92,7 +92,7 @@ public interface BlockGenericContextWO<
 	
 	@Override
 	default BlockGenericContextWO<B, T, E> pushRelative(AbsRelation direction) {
-		return push(direction.getVector());
+		return push(getLocation().add_(direction.getVector()));
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/common/world/generic/context/WorldContexts.java

@@ -146,7 +146,7 @@ class WorldContexts {
 		 * @see #pop()
 		 */
 		default Block pushRelative(AbsRelation direction) {
-			return push(direction.getVector());
+			return push(getLocation().add_(direction.getVector()));
 		}
 
 		/**

src/main/java/ru/windcorp/progressia/server/world/context/ServerBlockContext.java

@@ -41,7 +41,7 @@ public interface ServerBlockContext extends BlockDataContext, ServerWorldContext
 		
 		@Override
 		default ServerBlockContext.Logic pushRelative(AbsRelation direction) {
-			return push(direction.getVector());
+			return push(getLocation().add_(direction.getVector()));
 		}
 		
 		@Override
@@ -71,7 +71,7 @@ public interface ServerBlockContext extends BlockDataContext, ServerWorldContext
 	
 	@Override
 	default ServerBlockContext pushRelative(AbsRelation direction) {
-		return push(direction.getVector());
+		return push(getLocation().add_(direction.getVector()));
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/server/world/context/ServerBlockContextRO.java

@@ -46,7 +46,7 @@ public interface ServerBlockContextRO extends ServerWorldContextRO, BlockDataCon
 		
 		@Override
 		default ServerBlockContextRO.Logic pushRelative(AbsRelation direction) {
-			return push(direction.getVector());
+			return push(getLocation().add_(direction.getVector()));
 		}
 		
 		@Override
@@ -76,7 +76,7 @@ public interface ServerBlockContextRO extends ServerWorldContextRO, BlockDataCon
 	
 	@Override
 	default ServerBlockContextRO pushRelative(AbsRelation direction) {
-		return push(direction.getVector());
+		return push(getLocation().add_(direction.getVector()));
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/server/world/context/impl/DefaultServerContextBuilders.java

@@ -29,7 +29,7 @@ public interface DefaultServerContextBuilders {
 
 	DefaultServerContext build();
 
-	public interface Empty /* does not extend RSCB */ {
+	public interface Empty /* does not extend DSCB */ {
 
 		WithWorld in(Server server, WorldData world);
 

src/main/java/ru/windcorp/progressia/server/world/context/impl/DefaultServerContextImpl.java

@@ -150,7 +150,7 @@ class DefaultServerContextImpl extends DefaultServerContext
 		switch (getRole()) {
 		case TILE:
 			result = String.format(
-				"ServerTileContext[x=%d, y=%d, z=%d, %s, index=%d]",
+				"ServerTileContext [x=%+4d, y=%+4d, z=%+4d, %s, index=%d]",
 				frame.location.x,
 				frame.location.y,
 				frame.location.z,
@@ -160,16 +160,16 @@ class DefaultServerContextImpl extends DefaultServerContext
 			break;
 		case TILE_STACK:
 			result = String
-				.format("ServerBlockFaceContext[x=%d, y=%d, z=%d, %s]", frame.location.x, frame.location.y, frame.location.z, frame.face);
+				.format("ServerBlockFaceContext [x=%+4d, y=%+4d, z=%+4d, %s]", frame.location.x, frame.location.y, frame.location.z, frame.face);
 			break;
 		case LOCATION:
-			result = String.format("ServerBlockContext[x=%d, y=%d, z=%d]", frame.location.x, frame.location.y, frame.location.z);
+			result = String.format("ServerBlockContext [x=%+4d, y=%+4d, z=%+4d]", frame.location.x, frame.location.y, frame.location.z);
 			break;
 		case WORLD:
-			result = String.format("ServerWorldContext");
+			result = "ServerWorldContext";
 			break;
 		default:
-			result = "Uninitialized ReusableServerContext";
+			result = "Uninitialized DefaultServerContext";
 			break;
 		}
 
@@ -188,7 +188,6 @@ class DefaultServerContextImpl extends DefaultServerContext
 	public Empty reuse() {
 
 		server = null;
-//		worldLogic = null;
 		world = null;
 		
 		while (isSubcontexting()) {

src/main/java/ru/windcorp/progressia/server/world/context/impl/FilterServerContext.java

@@ -51,6 +51,11 @@ public abstract class FilterServerContext implements ServerTileContext {
 	public ServerTileContext getParent() {
 		return parent;
 	}
+	
+	@Override
+	public String toString() {
+		return getClass().getSimpleName() + " [" + parent + "]";
+	}
 
 	@Override
 	public int getLayer() {

src/main/java/ru/windcorp/progressia/server/world/tasks/TickChunk.java

@@ -178,12 +178,16 @@ public class TickChunk extends Evaluation {
 			ServerTileContext tileContext = context.push(i);
 			
 			TileLogic logic = tileContext.logic().getTile();
-			if (!(logic instanceof TickableTile))
-				return;
+			if (!(logic instanceof TickableTile)) {
+				tileContext.pop();
+				continue;
+			}
 			TickableTile tickable = (TickableTile) logic;
 
-			if (tickable.getTickingPolicy(tileContext) != TickingPolicy.RANDOM)
-				return;
+			if (tickable.getTickingPolicy(tileContext) != TickingPolicy.RANDOM) {
+				tileContext.pop();
+				continue;
+			}
 			tickable.tick(tileContext);
 			
 			tileContext.pop();

src/main/java/ru/windcorp/progressia/server/world/tile/HangingTileLogic.java

@@ -49,9 +49,7 @@ public class HangingTileLogic extends TileLogic implements UpdateableTile {
 
 		context.pushOpposite();
 		BlockLogic complHost = context.logic().getBlock();
-		boolean result = complHost == null || !complHost.isSolid(context, context.getFace());
-		context.pop();
-		return result;
+		return context.popAndReturn(complHost == null || !complHost.isSolid(context, context.getFace()));
 	}
 
 	public boolean canBeSquashed(ServerTileContextRO context) {

src/main/java/ru/windcorp/progressia/test/TestTileLogicGrass.java

@@ -50,7 +50,7 @@ public class TestTileLogicGrass extends HangingTileLogic implements TickableTile
 	@Override
 	public void tick(ServerTileContext context) {
 		if (!isLocationSuitable(context)) {
-//			context.removeThisTile();
+			context.removeTile();
 		}
 	}