Fix Copycat step placement helper (#6267)

Author: IThundxr

src/main/java/com/simibubi/create/content/decoration/copycat/CopycatStepBlock.java

@@ -4,8 +4,10 @@
 
 import com.simibubi.create.AllBlocks;
 import com.simibubi.create.AllShapes;
+import com.simibubi.create.content.kinetics.steamEngine.PoweredShaftBlock;
 import com.simibubi.create.foundation.placement.IPlacementHelper;
 import com.simibubi.create.foundation.placement.PlacementHelpers;
+import com.simibubi.create.foundation.placement.PlacementOffset;
 import com.simibubi.create.foundation.placement.PoleHelper;
 import com.simibubi.create.foundation.utility.Iterate;
 import com.simibubi.create.foundation.utility.VoxelShaper;
@@ -36,6 +38,8 @@
 import net.minecraft.world.phys.shapes.CollisionContext;
 import net.minecraft.world.phys.shapes.VoxelShape;
 
+import org.jetbrains.annotations.NotNull;
+
 public class CopycatStepBlock extends WaterloggedCopycatBlock {
 
 	public static final EnumProperty<Half> HALF = BlockStateProperties.HALF;
@@ -134,7 +138,7 @@ public boolean canFaceBeOccluded(BlockState state, Direction face) {
 			return (state.getValue(HALF) == Half.TOP) == (face == Direction.UP);
 		return state.getValue(FACING) == face;
 	}
-	
+
 	@Override
 	public boolean shouldFaceAlwaysRender(BlockState state, Direction face) {
 		return canFaceBeOccluded(state, face.getOpposite());
@@ -222,10 +226,21 @@ public PlacementHelper() {
 		}
 
 		@Override
-		public Predicate<ItemStack> getItemPredicate() {
+		public @NotNull Predicate<ItemStack> getItemPredicate() {
 			return AllBlocks.COPYCAT_STEP::isIn;
 		}
 
+		@Override
+		public @NotNull PlacementOffset getOffset(Player player, Level world, BlockState state, BlockPos pos,
+												  BlockHitResult ray) {
+			PlacementOffset offset = super.getOffset(player, world, state, pos, ray);
+
+			if (offset.isSuccessful())
+				offset.withTransform(offset.getTransform()
+						.andThen(s -> s.setValue(HALF, state.getValue(HALF))));
+
+			return offset;
+		}
 	}
 
 }