fix antigravel and upward falling blocks

common-1.21.1/src/main/java/com/craisinlord/antarchy/content/block/AntigravelBlock.java

@@ -34,9 +34,7 @@ public class AntigravelBlock extends Block {
 
     @Override
     protected BlockState updateShape(BlockState state, Direction direction, BlockState neighborState, LevelAccessor level, BlockPos pos, BlockPos neighborPos) {
-        if (direction == Direction.UP) {
-            level.scheduleTick(pos, this, 2);
-        }
+        level.scheduleTick(pos, this, 2);
         return super.updateShape(state, direction, neighborState, level, pos, neighborPos);
     }
 

common-1.21.1/src/main/java/com/craisinlord/antarchy/content/entity/UpwardFallingBlockEntity.java

@@ -11,6 +11,7 @@ import net.minecraft.tags.BlockTags;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.EntityType;
 import net.minecraft.world.entity.LivingEntity;
+import net.minecraft.world.entity.MoverType;
 import net.minecraft.world.item.ItemStack;
 import net.minecraft.world.level.Level;
 import net.minecraft.world.level.block.Block;
@@ -28,15 +29,17 @@ public class UpwardFallingBlockEntity extends Entity {
     private static final EntityDataAccessor<BlockState> DATA_BLOCK_STATE =
             SynchedEntityData.defineId(UpwardFallingBlockEntity.class, EntityDataSerializers.BLOCK_STATE);
 
-    private static final double RISE_SPEED = 0.5;
+    private static final double RISE_ACCEL = 0.04;
+    private static final double DRAG       = 0.98;
     private static final int    MAX_TICKS  = 200;
 
     public int time = 0;
     private boolean breaksOnLeaves = true;
+    private double distanceTraveled = 0.0;
 
     public UpwardFallingBlockEntity(EntityType<UpwardFallingBlockEntity> type, Level level) {
         super(type, level);
-        this.noPhysics = true;
+        this.blocksBuilding = true;
     }
 
     @Override
@@ -78,10 +81,11 @@ public class UpwardFallingBlockEntity extends Entity {
             return;
         }
 
-        // Move upward directly — noPhysics=true means move() just calls setPos().
-        // Runs on both sides so the client simulates the same deterministic rise
-        // instead of relying on interpolated network updates, matching vanilla FallingBlockEntity.
-        setPos(getX(), getY() + RISE_SPEED, getZ());
+        double beforeY = getY();
+        setDeltaMovement(getDeltaMovement().add(0.0, RISE_ACCEL, 0.0));
+        move(MoverType.SELF, getDeltaMovement());
+        setDeltaMovement(getDeltaMovement().scale(DRAG));
+        distanceTraveled += Math.max(0.0, getY() - beforeY);
 
         if (level().isClientSide) return;
 
@@ -93,7 +97,7 @@ public class UpwardFallingBlockEntity extends Entity {
 
         damageEntitiesAlongPath(blockState);
 
-        BlockPos headPos  = BlockPos.containing(getX(), getY() + getBbHeight(), getZ());
+        BlockPos headPos  = BlockPos.containing(getX(), getBoundingBox().maxY, getZ());
         BlockState above  = level().getBlockState(headPos);
 
         // Leaves block the entity but can't hold scaffolding — drop as item, unless this
@@ -103,10 +107,9 @@ public class UpwardFallingBlockEntity extends Entity {
             return;
         }
 
-        boolean hitCeiling     = !above.isAir() && !above.getCollisionShape(level(), headPos).isEmpty();
         boolean hitScaffolding = above.getBlock() instanceof AntimetalScaffoldingBlock;
 
-        if (hitCeiling || hitScaffolding) {
+        if (this.verticalCollision || hitScaffolding) {
             placeAtLanding(blockState, headPos.below());
             return;
         }
@@ -138,8 +141,7 @@ public class UpwardFallingBlockEntity extends Entity {
     }
 
     private float getImpactDamage(BlockState state) {
-        float travelDistance = (float) this.time * (float) RISE_SPEED;
-        float baseDamage = Math.max(0.0F, travelDistance - 1.5F);
+        float baseDamage = Math.max(0.0F, (float) this.distanceTraveled - 1.5F);
         if (baseDamage <= 0.0F) {
             return 0.0F;
         }

common-1.21.1/src/main/java/com/craisinlord/antarchy/content/worldgen/thoraxis/ThoraxisUndersideManager.java

@@ -10,6 +10,7 @@ import java.util.Set;
 import java.util.UUID;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.server.level.ServerLevel;
+import net.minecraft.world.effect.MobEffectInstance;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.LivingEntity;
 
@@ -17,6 +18,7 @@ public final class ThoraxisUndersideManager {
     public static final int GRAVITY_FLIP_Y = 0;
     private static final ResourceLocation THORAXIS_DIMENSION = ResourceLocation.fromNamespaceAndPath(Antarchy.MODID, "thoraxis");
     private static final AntarchyGravityTransition TRANSITION = new AntarchyGravityTransition(12);
+    private static final int EFFECT_DURATION_TICKS = 40;
     private static final Set<UUID> UNDERSIDE_FORCED_GRAVITY = new HashSet<>();
 
     private ThoraxisUndersideManager() {
@@ -33,8 +35,19 @@ public final class ThoraxisUndersideManager {
                 continue;
             }
 
+            boolean inUnderside = entity.getY() < GRAVITY_FLIP_Y;
+
+            if (entity instanceof LivingEntity living) {
+                if (inUnderside) {
+                    living.addEffect(new MobEffectInstance(AntarchyObjects.INVERTED_EFFECT.get(), EFFECT_DURATION_TICKS, 0, true, false, false));
+                } else if (living.hasEffect(AntarchyObjects.INVERTED_EFFECT.get())) {
+                    living.removeEffect(AntarchyObjects.INVERTED_EFFECT.get());
+                }
+                continue;
+            }
+
             UUID uuid = entity.getUUID();
-            if (entity.getY() < GRAVITY_FLIP_Y) {
+            if (inUnderside) {
                 activeThisTick.add(uuid);
                 UNDERSIDE_FORCED_GRAVITY.add(uuid);
                 if (AntarchyGravityApi.getGravityDirection(entity) != AntarchyGravityDirection.UP
@@ -44,11 +57,9 @@ public final class ThoraxisUndersideManager {
                 continue;
             }
 
-            if (!UNDERSIDE_FORCED_GRAVITY.remove(uuid)) {
-                continue;
-            }
-
-            if (shouldReleaseGravity(entity)) {
+            if (UNDERSIDE_FORCED_GRAVITY.remove(uuid)
+                    && AntarchyGravityApi.getGravityDirection(entity) == AntarchyGravityDirection.UP
+                    && AntarchyGravityApi.isGravityForced(entity)) {
                 AntarchyGravityApi.setGravityDirection(entity, AntarchyGravityDirection.DOWN, false, TRANSITION);
             }
         }
@@ -56,18 +67,6 @@ public final class ThoraxisUndersideManager {
         UNDERSIDE_FORCED_GRAVITY.retainAll(activeThisTick);
     }
 
-    private static boolean shouldReleaseGravity(Entity entity) {
-        if (AntarchyGravityApi.getGravityDirection(entity) != AntarchyGravityDirection.UP) {
-            return false;
-        }
-
-        if (entity instanceof LivingEntity living && living.hasEffect(AntarchyObjects.INVERTED_EFFECT.get())) {
-            return false;
-        }
-
-        return AntarchyGravityApi.isGravityForced(entity);
-    }
-
     public static boolean isThoraxis(ServerLevel level) {
         return level.dimension().location().equals(THORAXIS_DIMENSION);
     }

common-1.21.1/src/main/resources/data/antarchy/worldgen/density_function/thoraxis_underside_density.json

@@ -8,7 +8,7 @@
       "argument1": {
         "type": "minecraft:y_clamped_gradient",
         "from_y": -256,
-        "to_y": -16,
+        "to_y": -1,
         "from_value": -2.0,
         "to_value": 1.05
       },

common-1.21.1/src/main/resources/data/antarchy/worldgen/noise_settings/thoraxis.json

@@ -74,7 +74,7 @@
                       "from_value": 0.0,
                       "from_y": -8,
                       "to_value": 1.0,
-                      "to_y": 24
+                      "to_y": 4
                     },
                     "argument2": -2.5
                   },
@@ -150,7 +150,7 @@
               "type": "minecraft:y_above",
               "add_stone_depth": false,
               "anchor": {
-                "absolute": 4
+                "absolute": 1
               },
               "surface_depth_multiplier": 0
             }