From 1a4af9036e3c10896c75c2a863ffcfdf81bc1f4e Mon Sep 17 00:00:00 2001
From: MUKSC <68376185+MUKSC@users.noreply.github.com>
Date: Tue, 6 Feb 2024 03:11:54 +0900
Subject: [PATCH 1/2] Implement `rotate()` and `mirror()` for vertical slabs

---
 .../autoslabs/mixin/SlabBlockMixin.java       | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java b/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java
index cac0ad8..287b137 100644
--- a/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java
+++ b/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java
@@ -11,6 +11,8 @@
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemPlacementContext;
 import net.minecraft.item.ItemStack;
+import net.minecraft.util.BlockMirror;
+import net.minecraft.util.BlockRotation;
 import net.minecraft.util.hit.BlockHitResult;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Direction;
@@ -25,6 +27,8 @@
 
 import static io.github.andrew6rant.autoslabs.Util.TYPE;
 import static io.github.andrew6rant.autoslabs.Util.VERTICAL_TYPE;
+import static io.github.andrew6rant.autoslabs.VerticalType.*;
+import static net.minecraft.block.enums.SlabType.BOTTOM;
 import static net.minecraft.block.enums.SlabType.TOP;
 
 @Mixin(SlabBlock.class)
@@ -83,4 +87,35 @@ public void afterBreak(World world, PlayerEntity player, BlockPos pos, BlockStat
 		}
 	}
 
+	@Override
+	public BlockState rotate(BlockState state, BlockRotation rotation) {
+		SlabType slabType = state.get(TYPE);
+		if (slabType == null) return super.rotate(state, rotation);
+		if (slabType == SlabType.DOUBLE) return state;
+
+		VerticalType verticalType = state.get(VERTICAL_TYPE);
+		if (verticalType == null) return super.rotate(state, rotation);
+		if (verticalType == FALSE || rotation == BlockRotation.NONE) return state;
+
+		return switch (rotation) {
+            case CLOCKWISE_90 -> state
+                    .with(VERTICAL_TYPE, verticalType == NORTH_SOUTH ? EAST_WEST : NORTH_SOUTH)
+                    .with(TYPE, verticalType == EAST_WEST ? (slabType == TOP ? BOTTOM : TOP) : slabType);
+			case CLOCKWISE_180 -> state
+					.with(TYPE, slabType == TOP ? BOTTOM : TOP);
+			case COUNTERCLOCKWISE_90 -> state
+					.with(VERTICAL_TYPE, verticalType == NORTH_SOUTH ? EAST_WEST : NORTH_SOUTH)
+					.with(TYPE, verticalType == NORTH_SOUTH ? (slabType == TOP ? BOTTOM : TOP) : slabType);
+            default -> state;
+        };
+    }
+
+	@Override
+	public BlockState mirror(BlockState state, BlockMirror mirror) {
+		VerticalType verticalType = state.get(VERTICAL_TYPE);
+		if (verticalType == null) return super.mirror(state, mirror);
+		if (verticalType == FALSE || mirror == BlockMirror.NONE) return state;
+		return state.with(TYPE, state.get(TYPE) == TOP ? BOTTOM : TOP);
+	}
+
 }
\ No newline at end of file

From c75720074de65e4f5a834893a89d2363c0dad0ba Mon Sep 17 00:00:00 2001
From: MUKSC <68376185+MUKSC@users.noreply.github.com>
Date: Sat, 10 Feb 2024 13:23:31 +0900
Subject: [PATCH 2/2] Fix wrong `mirror()` implementation

---
 .../autoslabs/mixin/SlabBlockMixin.java         | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java b/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java
index 287b137..fc41d77 100644
--- a/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java
+++ b/src/main/java/io/github/andrew6rant/autoslabs/mixin/SlabBlockMixin.java
@@ -112,10 +112,25 @@ public BlockState rotate(BlockState state, BlockRotation rotation) {
 
 	@Override
 	public BlockState mirror(BlockState state, BlockMirror mirror) {
+		SlabType slabType = state.get(TYPE);
+		if (slabType == null) return super.mirror(state, mirror);
+		if (slabType == SlabType.DOUBLE) return state;
+
 		VerticalType verticalType = state.get(VERTICAL_TYPE);
 		if (verticalType == null) return super.mirror(state, mirror);
 		if (verticalType == FALSE || mirror == BlockMirror.NONE) return state;
-		return state.with(TYPE, state.get(TYPE) == TOP ? BOTTOM : TOP);
+
+		return switch (mirror) {
+			case LEFT_RIGHT -> switch (verticalType) {
+				case EAST_WEST -> state;
+				default -> state.with(TYPE, state.get(TYPE) == TOP ? BOTTOM : TOP);
+			};
+			case FRONT_BACK -> switch (verticalType) {
+				case NORTH_SOUTH -> state;
+				default -> state.with(TYPE, state.get(TYPE) == TOP ? BOTTOM : TOP);
+			};
+			default -> state;
+		};
 	}
 
 }
\ No newline at end of file