From 3807b8c2772c12bcafd5adae3868b7a73875530f Mon Sep 17 00:00:00 2001
From: dfsek <dfsek@protonmail.com>
Date: Wed, 2 Dec 2020 21:34:45 -0700
Subject: [PATCH] slabs and stairs generate on ceiling

---
 build.gradle.kts                              |   2 +-
 ...{Tectonic-1.0.0.jar => Tectonic-1.0.1.jar} | Bin 32156 -> 32277 bytes
 .../dfsek/terra/command/ReloadCommand.java    |   2 +-
 .../com/dfsek/terra/generation/Sampler.java   |   2 +-
 .../terra/generation/TerraChunkGenerator.java |  87 ++++++++++++------
 .../dfsek/terra/registry/ConfigRegistry.java  |   6 +-
 .../dfsek/terra/structure/spawn/AirSpawn.java |   4 +-
 .../terra/structure/spawn/LandSpawn.java      |   4 +-
 .../terra/structure/spawn/OceanSpawn.java     |   4 +-
 src/main/resources/lang/en_us.yml             |   1 +
 10 files changed, 76 insertions(+), 36 deletions(-)
 rename lib/{Tectonic-1.0.0.jar => Tectonic-1.0.1.jar} (66%)

diff --git a/build.gradle.kts b/build.gradle.kts
index e93c63ae9..3dd1681c0 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -56,7 +56,7 @@ dependencies {
 
     implementation("net.jafama:jafama:2.3.2")
 
-    implementation(name = "Tectonic-1.0.0", group = "")
+    implementation(name = "Tectonic-1.0.1", group = "")
 
 
     // JUnit.
diff --git a/lib/Tectonic-1.0.0.jar b/lib/Tectonic-1.0.1.jar
similarity index 66%
rename from lib/Tectonic-1.0.0.jar
rename to lib/Tectonic-1.0.1.jar
index 577e6ca4cafedfe473da8414892347ce410b92cb..dc4dd374088c4f119b20e09e09948cb5a815925b 100644
GIT binary patch
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diff --git a/src/main/java/com/dfsek/terra/command/ReloadCommand.java b/src/main/java/com/dfsek/terra/command/ReloadCommand.java
index d21c19e35..42ebba93f 100644
--- a/src/main/java/com/dfsek/terra/command/ReloadCommand.java
+++ b/src/main/java/com/dfsek/terra/command/ReloadCommand.java
@@ -31,7 +31,7 @@ public class ReloadCommand extends Command implements DebugCommand {
     public boolean execute(@NotNull CommandSender sender, org.bukkit.command.@NotNull Command command, @NotNull String label, @NotNull String[] args) {
         PluginConfig.load(getMain());
         LangUtil.load(PluginConfig.getLanguage(), getMain()); // Load language.
-        ConfigRegistry.loadAll(getMain());
+        if(!ConfigRegistry.loadAll(getMain())) LangUtil.send("command.reload-error", sender);
         TerraWorld.invalidate();
         LangUtil.send("command.reload", sender);
         return true;
diff --git a/src/main/java/com/dfsek/terra/generation/Sampler.java b/src/main/java/com/dfsek/terra/generation/Sampler.java
index 4f5254e02..1bc098331 100644
--- a/src/main/java/com/dfsek/terra/generation/Sampler.java
+++ b/src/main/java/com/dfsek/terra/generation/Sampler.java
@@ -13,6 +13,6 @@ public class Sampler {
     }
 
     public double sample(double x, double y, double z) {
-        return interpolator.getNoise(x, y - elevationInterpolator.getElevation(FastMath.roundToInt(x), FastMath.roundToInt(z)), z);
+        return interpolator.getNoise(x, y, z) + elevationInterpolator.getElevation(FastMath.roundToInt(x), FastMath.roundToInt(z));
     }
 }
diff --git a/src/main/java/com/dfsek/terra/generation/TerraChunkGenerator.java b/src/main/java/com/dfsek/terra/generation/TerraChunkGenerator.java
index 337f01ce6..8456291ff 100644
--- a/src/main/java/com/dfsek/terra/generation/TerraChunkGenerator.java
+++ b/src/main/java/com/dfsek/terra/generation/TerraChunkGenerator.java
@@ -20,8 +20,10 @@ import org.bukkit.Chunk;
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.block.BlockFace;
+import org.bukkit.block.data.Bisected;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.block.data.Waterlogged;
+import org.bukkit.block.data.type.Slab;
 import org.bukkit.block.data.type.Stairs;
 import org.bukkit.generator.BlockPopulator;
 import org.bukkit.util.Vector;
@@ -85,33 +87,15 @@ public class TerraChunkGenerator extends GaeaChunkGenerator {
         return c.getPalette().getPalette(y);
     }
 
-    private static void prepareBlockPart(BlockData down, BlockData orig, ChunkData chunk, Vector block, Map<Material, Palette<BlockData>> slabs,
-                                         Map<Material, Palette<BlockData>> stairs, double thresh, ChunkInterpolator interpolator, ElevationInterpolator elevationInterpolator) {
-        double elevation = elevationInterpolator.getElevation(block.getBlockX(), block.getBlockZ());
-        if(interpolator.getNoise(block.getBlockX(), block.getBlockY() - 0.4 - elevation, block.getBlockZ()) > thresh) {
+    private static void prepareBlockPartFloor(BlockData down, BlockData orig, ChunkData chunk, Vector block, Map<Material, Palette<BlockData>> slabs,
+                                              Map<Material, Palette<BlockData>> stairs, double thresh, Sampler sampler) {
+        if(sampler.sample(block.getBlockX(), block.getBlockY() - 0.4, block.getBlockZ()) > thresh) {
             if(stairs != null) {
                 Palette<BlockData> stairPalette = stairs.get(down.getMaterial());
                 if(stairPalette != null) {
                     BlockData stair = stairPalette.get(0, block.getBlockX(), block.getBlockZ());
                     Stairs stairNew = (Stairs) stair.clone();
-                    int elevationN = (int) elevationInterpolator.getElevation(block.getBlockX(), block.getBlockZ() - 1); // Northern elevation
-                    int elevationS = (int) elevationInterpolator.getElevation(block.getBlockX(), block.getBlockZ() + 1); // Southern elevation
-                    int elevationE = (int) elevationInterpolator.getElevation(block.getBlockX() + 1, block.getBlockZ()); // Eastern elevation
-                    int elevationW = (int) elevationInterpolator.getElevation(block.getBlockX() - 1, block.getBlockZ()); // Western elevation
-                    if(interpolator.getNoise(block.getBlockX() - 0.5, block.getBlockY() - elevationW, block.getBlockZ()) > thresh) {
-                        stairNew.setFacing(BlockFace.WEST);
-                    } else if(interpolator.getNoise(block.getBlockX(), block.getBlockY() - elevationN, block.getBlockZ() - 0.5) > thresh) {
-                        stairNew.setFacing(BlockFace.NORTH);
-                    } else if(interpolator.getNoise(block.getBlockX(), block.getBlockY() - elevationS, block.getBlockZ() + 0.5) > thresh) {
-                        stairNew.setFacing(BlockFace.SOUTH);
-                    } else if(interpolator.getNoise(block.getBlockX() + 0.5, block.getBlockY() - elevationE, block.getBlockZ()) > thresh) {
-                        stairNew.setFacing(BlockFace.EAST);
-                    } else stairNew = null;
-                    if(stairNew != null) {
-                        if(orig.matches(DataUtil.WATER)) stairNew.setWaterlogged(true);
-                        chunk.setBlock(block.getBlockX(), block.getBlockY(), block.getBlockZ(), stairNew);
-                        return;
-                    }
+                    if(placePart(orig, chunk, block, thresh, sampler, stairNew)) return;
                 }
             }
             BlockData slab = slabs.getOrDefault(down.getMaterial(), DataUtil.BLANK_PALETTE).get(0, block.getBlockX(), block.getBlockZ());
@@ -122,6 +106,46 @@ public class TerraChunkGenerator extends GaeaChunkGenerator {
         }
     }
 
+    private static void prepareBlockPartCeiling(BlockData up, BlockData orig, ChunkData chunk, Vector block, Map<Material, Palette<BlockData>> slabs,
+                                                Map<Material, Palette<BlockData>> stairs, double thresh, Sampler sampler) {
+        if(sampler.sample(block.getBlockX(), block.getBlockY() + 0.4, block.getBlockZ()) > thresh) {
+            if(stairs != null) {
+                Palette<BlockData> stairPalette = stairs.get(up.getMaterial());
+                if(stairPalette != null) {
+                    BlockData stair = stairPalette.get(0, block.getBlockX(), block.getBlockZ());
+                    Stairs stairNew = (Stairs) stair.clone();
+                    stairNew.setHalf(Bisected.Half.TOP);
+                    if(placePart(orig, chunk, block, thresh, sampler, stairNew)) return;
+                }
+            }
+            BlockData slab = slabs.getOrDefault(up.getMaterial(), DataUtil.BLANK_PALETTE).get(0, block.getBlockX(), block.getBlockZ());
+            if(slab instanceof Bisected) ((Bisected) slab).setHalf(Bisected.Half.TOP);
+            if(slab instanceof Slab) ((Slab) slab).setType(Slab.Type.TOP);
+            if(slab instanceof Waterlogged) {
+                ((Waterlogged) slab).setWaterlogged(orig.matches(DataUtil.WATER));
+            } else if(orig.matches(DataUtil.WATER)) return;
+            chunk.setBlock(block.getBlockX(), block.getBlockY(), block.getBlockZ(), slab);
+        }
+    }
+
+    private static boolean placePart(BlockData orig, ChunkData chunk, Vector block, double thresh, Sampler sampler, Stairs stairNew) {
+        if(sampler.sample(block.getBlockX() - 0.55, block.getBlockY(), block.getBlockZ()) > thresh) {
+            stairNew.setFacing(BlockFace.WEST);
+        } else if(sampler.sample(block.getBlockX(), block.getBlockY(), block.getBlockZ() - 0.55) > thresh) {
+            stairNew.setFacing(BlockFace.NORTH);
+        } else if(sampler.sample(block.getBlockX(), block.getBlockY(), block.getBlockZ() + 0.55) > thresh) {
+            stairNew.setFacing(BlockFace.SOUTH);
+        } else if(sampler.sample(block.getBlockX() + 0.55, block.getBlockY(), block.getBlockZ()) > thresh) {
+            stairNew.setFacing(BlockFace.EAST);
+        } else stairNew = null;
+        if(stairNew != null) {
+            if(orig.matches(DataUtil.WATER)) stairNew.setWaterlogged(true);
+            chunk.setBlock(block.getBlockX(), block.getBlockY(), block.getBlockZ(), stairNew);
+            return true;
+        }
+        return false;
+    }
+
     @Override
     public void attachProfiler(WorldProfiler p) {
         super.attachProfiler(p);
@@ -158,19 +182,30 @@ public class TerraChunkGenerator extends GaeaChunkGenerator {
 
                 int sea = c.getSeaLevel();
                 Palette<BlockData> seaPalette = c.getOceanPalette();
+
+                boolean justSet = false;
+                BlockData data = null;
                 for(int y = world.getMaxHeight() - 1; y >= 0; y--) {
                     if(sampler.sample(x, y, z) > 0) {
-                        BlockData data = getPalette(x, y, z, c, sampler).get(paletteLevel, cx, cz);
+                        justSet = true;
+                        data = getPalette(x, y, z, c, sampler).get(paletteLevel, cx, cz);
                         chunk.setBlock(x, y, z, data);
                         if(paletteLevel == 0 && c.doSlabs() && y < 255) {
-                            prepareBlockPart(data, chunk.getBlockData(x, y + 1, z), chunk, new Vector(x, y + 1, z), c.getSlabPalettes(),
-                                    c.getStairPalettes(), c.getSlabThreshold(), interpolator, elevationInterpolator);
+                            prepareBlockPartFloor(data, chunk.getBlockData(x, y + 1, z), chunk, new Vector(x, y + 1, z), c.getSlabPalettes(),
+                                    c.getStairPalettes(), c.getSlabThreshold(), sampler);
                         }
                         paletteLevel++;
                     } else if(y <= sea) {
+                        justSet = false;
                         chunk.setBlock(x, y, z, seaPalette.get(sea - y, x + xOrig, z + zOrig));
                         paletteLevel = 0;
-                    } else paletteLevel = 0;
+                    } else {
+                        if(justSet && c.doSlabs()) {
+                            prepareBlockPartCeiling(data, chunk.getBlockData(x, y, z), chunk, new Vector(x, y, z), c.getSlabPalettes(), c.getStairPalettes(), c.getSlabThreshold(), sampler);
+                        }
+                        justSet = false;
+                        paletteLevel = 0;
+                    }
                 }
             }
         }
diff --git a/src/main/java/com/dfsek/terra/registry/ConfigRegistry.java b/src/main/java/com/dfsek/terra/registry/ConfigRegistry.java
index d2b11fbd6..5c961e5d6 100644
--- a/src/main/java/com/dfsek/terra/registry/ConfigRegistry.java
+++ b/src/main/java/com/dfsek/terra/registry/ConfigRegistry.java
@@ -29,13 +29,15 @@ public class ConfigRegistry extends TerraRegistry<ConfigPack> {
         add(pack.getTemplate().getID(), pack);
     }
 
-    public static void loadAll(JavaPlugin main) {
+    public static boolean loadAll(JavaPlugin main) {
+        boolean valid = true;
         File packsFolder = new File(main.getDataFolder(), "packs");
         for(File dir : packsFolder.listFiles(File::isDirectory)) {
             try {
                 getRegistry().load(dir);
             } catch(ConfigException e) {
                 e.printStackTrace();
+                valid = false;
             }
         }
         for(File zip : packsFolder.listFiles(file -> file.getName().endsWith(".zip") || file.getName().endsWith(".jar") || file.getName().endsWith(".terra"))) {
@@ -44,8 +46,10 @@ public class ConfigRegistry extends TerraRegistry<ConfigPack> {
                 getRegistry().load(new ZipFile(zip));
             } catch(IOException | ConfigException e) {
                 e.printStackTrace();
+                valid = false;
             }
         }
+        return valid;
     }
 
     public void load(ZipFile file) throws ConfigException {
diff --git a/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java b/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java
index 44bcc684c..ee1037798 100644
--- a/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java
+++ b/src/main/java/com/dfsek/terra/structure/spawn/AirSpawn.java
@@ -18,7 +18,7 @@ public class AirSpawn extends Requirement {
         UserDefinedBiome b = (UserDefinedBiome) tw.getGrid().getBiome(x, z, GenerationPhase.POPULATE);
         BiomeTemplate c = b.getConfig();
         if(y <= c.getSeaLevel()) return false;
-        int yf = (int) (y - ((WorldGenerator) b.getGenerator()).getElevation(x, z));
-        return b.getGenerator().getNoise(getNoise(), getWorld(), x, yf, z) <= 0;
+        double elevation = ((WorldGenerator) b.getGenerator()).getElevation(x, z);
+        return b.getGenerator().getNoise(getNoise(), getWorld(), x, y, z) + elevation <= 0;
     }
 }
diff --git a/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java b/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java
index 50f210215..ffc6132b6 100644
--- a/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java
+++ b/src/main/java/com/dfsek/terra/structure/spawn/LandSpawn.java
@@ -15,7 +15,7 @@ public class LandSpawn extends Requirement {
     public boolean matches(int x, int y, int z) {
         TerraWorld tw = TerraWorld.getWorld(getWorld());
         UserDefinedBiome b = (UserDefinedBiome) tw.getGrid().getBiome(x, z, GenerationPhase.POPULATE);
-        int yf = (int) (y - ((WorldGenerator) b.getGenerator()).getElevation(x, z));
-        return b.getGenerator().getNoise(getNoise(), getWorld(), x, yf, z) > 0;
+        double elevation = ((WorldGenerator) b.getGenerator()).getElevation(x, z);
+        return b.getGenerator().getNoise(getNoise(), getWorld(), x, y, z) + elevation > 0;
     }
 }
diff --git a/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java b/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java
index fd6aa864a..936a51940 100644
--- a/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java
+++ b/src/main/java/com/dfsek/terra/structure/spawn/OceanSpawn.java
@@ -18,7 +18,7 @@ public class OceanSpawn extends Requirement {
         UserDefinedBiome b = (UserDefinedBiome) tw.getGrid().getBiome(x, z, GenerationPhase.POPULATE);
         BiomeTemplate c = b.getConfig();
         if(y > c.getSeaLevel()) return false;
-        int yf = (int) (y - ((WorldGenerator) b.getGenerator()).getElevation(x, z));
-        return b.getGenerator().getNoise(getNoise(), getWorld(), x, yf, z) <= 0;
+        double elevation = ((WorldGenerator) b.getGenerator()).getElevation(x, z);
+        return b.getGenerator().getNoise(getNoise(), getWorld(), x, y, z) + elevation <= 0;
     }
 }
diff --git a/src/main/resources/lang/en_us.yml b/src/main/resources/lang/en_us.yml
index 2c7228527..cfcfcff3c 100644
--- a/src/main/resources/lang/en_us.yml
+++ b/src/main/resources/lang/en_us.yml
@@ -11,6 +11,7 @@ command:
   players-only: "Command is for players only."
   world: "This command must be executed in a Terra world!"
   reload: "Reloaded Terra config."
+  reload-error: "Errors occurred while reloading Terra configurations. See logs for more information."
   version: "This server is running Terra version \"%1$s\", implementing Gaea version \"%2$s\""
   main-menu:
     - "--------------------Terra--------------------"