Added more grass variants

- Added flat grass tiles with varying opaqueness
- Renamed Test:Grass to Test:GrassOpaque
- Added Chernozem

src/main/java/ru/windcorp/progressia/server/world/generation/planet/PlanetTerrainGenerator.java

@@ -48,12 +48,11 @@ class PlanetTerrainGenerator {
 		this.parent = generator;
 
 		int seaLevel = (int) parent.getPlanet().getRadius();
-		SurfaceFloatField adjustedHeightMap = (f, n, w) -> heightMap.get(f, n, w) + generator.getPlanet().getRadius();
 
 		this.surfaceGenerators = AbsFace.mapToFaces(
 			face -> new SurfaceTerrainGenerator(
 				new Surface(face, seaLevel),
-				adjustedHeightMap,
+				heightMap,
 				layers
 			)
 		);

src/main/java/ru/windcorp/progressia/server/world/generation/surface/SurfaceTerrainGenerator.java

@@ -47,6 +47,7 @@ public class SurfaceTerrainGenerator {
 		
 		Vec3 offset = new Vec3(chunk.getMinX(), chunk.getMinY(), chunk.getMinZ());
 		AxisRotations.relativize(offset, chunk.getUp(), offset);
+		offset.z -= surface.getSeaLevel();
 		
 		SurfaceWorldContext context = surface.createContext(server, chunk, 0);
 		

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

@@ -101,6 +101,10 @@ public class TestContent {
 		register(new BlockRenderOpaqueCube("Test:Dirt", getBlockTexture("Dirt")));
 		register(new BlockLogic("Test:Dirt"));
 		
+		register(new BlockData("Test:Chernozem"));
+		register(new BlockRenderOpaqueCube("Test:Chernozem", getBlockTexture("Chernozem")));
+		register(new BlockLogic("Test:Chernozem"));
+
 		register(new BlockData("Test:Stone"));
 		register(new BlockRenderOpaqueCube("Test:Stone", getBlockTexture("Stone")));
 		register(new BlockLogic("Test:Stone"));
@@ -167,9 +171,19 @@ public class TestContent {
 	private static void registerTiles() {
 		Set<String> placeableBlacklist = new HashSet<>();
 
-		register(new TileData("Test:Grass"));
-		register(new TestTileRenderGrass("Test:Grass", getTileTexture("GrassTop"), getTileTexture("GrassSide")));
-		register(new TestTileLogicGrass("Test:Grass"));
+		for (String variant : new String[] {
+			"Opaque",
+			"Patches",
+			"Web",
+			"Threads"
+		}) {
+			String fullName = "Grass" + variant;
+			String id = "Test:" + fullName;
+			
+			register(new TileData(id));
+			register(new TestTileRenderGrass(id, getTileTexture(fullName + "Top"), getTileTexture(fullName + "Side"), variant.equals("Opaque")));
+			register(new TestTileLogicGrass(id));
+		}
 
 		register(new TileData("Test:Stones"));
 		register(new TileRenderTransparentSurface("Test:Stones", getTileTexture("Stones")));

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

@@ -26,15 +26,18 @@ public class TestTileRenderGrass extends TileRenderSurface {
 
 	private final Texture topTexture;
 	private final Texture sideTexture;
+	private final boolean isOpaque;
 
 	public TestTileRenderGrass(
 		String id,
 		Texture top,
-		Texture side
+		Texture side,
+		boolean isOpaque
 	) {
 		super(id);
 		this.topTexture = top;
 		this.sideTexture = side;
+		this.isOpaque = isOpaque;
 	}
 
 	@Override
@@ -44,7 +47,7 @@ public class TestTileRenderGrass extends TileRenderSurface {
 
 	@Override
 	public boolean isOpaque(RelFace face) {
-		return face == RelFace.UP;
+		return isOpaque && face == RelFace.UP;
 	}
 
 }

src/main/java/ru/windcorp/progressia/test/gen/TestGenerationConfig.java

@@ -116,7 +116,7 @@ public class TestGenerationConfig {
 			"Test:Grass",
 			f -> multiply(
 				tweak(octaves(FIELDS.primitive(), 2, 2), 40, 0.5, 1.2),
-				squash(tweak(FIELDS.get("Test:Forest", f), 1, -0.7, 1), 10),
+				squash(tweak(FIELDS.get("Test:Forest", f), 1, -1, 1), 10),
 				anti(squash(FIELDS.get("Test:Cliff", f), 10))
 			)
 		);

src/main/java/ru/windcorp/progressia/test/gen/TestGrassFeature.java

@@ -25,6 +25,8 @@ import com.google.common.collect.ImmutableSet;
 
 import ru.windcorp.progressia.common.util.ArrayFloatRangeMap;
 import ru.windcorp.progressia.common.util.FloatRangeMap;
+import ru.windcorp.progressia.common.world.block.BlockData;
+import ru.windcorp.progressia.common.world.block.BlockDataRegistry;
 import ru.windcorp.progressia.common.world.rels.RelFace;
 import ru.windcorp.progressia.common.world.tile.TileData;
 import ru.windcorp.progressia.common.world.tile.TileDataRegistry;
@@ -46,13 +48,21 @@ public class TestGrassFeature extends SurfaceTopLayerFeature {
 	private final SurfaceFloatField grassiness;
 	private final double scatterDensity = 1.0 / (3 * 3);
 	
-	private final TileData grass = TileDataRegistry.getInstance().get("Test:Grass");
+	private final BlockData chernozem = BlockDataRegistry.getInstance().get("Test:Chernozem");
 
-	private final FloatRangeMap<TileData> grasses = new ArrayFloatRangeMap<>();
+	private final FloatRangeMap<TileData> flatGrasses = new ArrayFloatRangeMap<>();
 	{
-		grasses.put(0.6f, 1, TileDataRegistry.getInstance().get("Test:TallGrass"));
-		grasses.put(0.4f, 0.6f, TileDataRegistry.getInstance().get("Test:MediumGrass"));
-		grasses.put(0.1f, 0.4f, TileDataRegistry.getInstance().get("Test:LowGrass"));
+		flatGrasses.put(0.4f, Float.POSITIVE_INFINITY, TileDataRegistry.getInstance().get("Test:GrassOpaque"));
+		flatGrasses.put(0.2f, 0.4f, TileDataRegistry.getInstance().get("Test:GrassPatches"));
+		flatGrasses.put(0.1f, 0.2f, TileDataRegistry.getInstance().get("Test:GrassWeb"));
+		flatGrasses.put(0.05f, 0.1f, TileDataRegistry.getInstance().get("Test:GrassThreads"));
+	}
+
+	private final FloatRangeMap<TileData> herbGrasses = new ArrayFloatRangeMap<>();
+	{
+		herbGrasses.put(0.6f, 1, TileDataRegistry.getInstance().get("Test:TallGrass"));
+		herbGrasses.put(0.4f, 0.6f, TileDataRegistry.getInstance().get("Test:MediumGrass"));
+		herbGrasses.put(0.1f, 0.4f, TileDataRegistry.getInstance().get("Test:LowGrass"));
 	}
 
 	private final List<TileData> scatter = ImmutableList.of(
@@ -81,11 +91,7 @@ public class TestGrassFeature extends SurfaceTopLayerFeature {
 		}
 		context.pop();
 
-		double grassiness = this.grassiness.get(context);
-		if (grassiness > 0.1) {
-			growGrass(context, grassiness);
-		}
-
+		growGrass(context, this.grassiness.get(context));
 		placeScatter(context);
 	}
 
@@ -97,21 +103,28 @@ public class TestGrassFeature extends SurfaceTopLayerFeature {
 	}
 
 	private void growGrass(SurfaceBlockContext context, double grassiness) {
-		for (RelFace face : RelFace.getFaces()) {
-			if (face == RelFace.DOWN)
-				continue;
+		TileData flatGrass = flatGrasses.get((float) grassiness);
+		if (flatGrass != null) {
+			for (RelFace face : RelFace.getFaces()) {
+				if (face == RelFace.DOWN)
+					continue;
+
+				if (context.pushRelative(face).logic().getBlock().isTransparent()) {
+					context.pop();
+					context.addTile(face, flatGrass);
+				} else {
+					context.pop();
+				}
 
-			if (context.pushRelative(face).logic().getBlock().isTransparent()) {
-				context.pop();
-				context.addTile(face, grass);
-			} else {
-				context.pop();
 			}
 			
+			if (grassiness > 0.8 && context.getBlock().getId().equals("Test:Dirt")) {
+				context.setBlock(chernozem);
+			}
 		}
 
 		if (context.getRandom().nextDouble() < grassiness) {
-			TileData herbGrass = grasses.get((float) grassiness);
+			TileData herbGrass = herbGrasses.get((float) grassiness);
 			if (herbGrass != null) {
 				context.addTile(RelFace.UP, herbGrass);
 			}