fix DT outputs sometimes on wrong layers

Author: serenibyss

src/main/java/gregtech/api/metatileentity/multiblock/MultiblockControllerBase.java

@@ -26,6 +26,7 @@
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.EnumFacing;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraftforge.common.capabilities.Capability;
 import org.apache.commons.lang3.ArrayUtils;
@@ -35,6 +36,7 @@
 import javax.annotation.Nullable;
 import java.util.*;
 import java.util.function.BiFunction;
+import java.util.function.Function;
 import java.util.function.Predicate;
 
 public abstract class MultiblockControllerBase extends MetaTileEntity implements IMultiblockController {
@@ -170,14 +172,18 @@ public Pair<TextureAtlasSprite, Integer> getParticleTexture() {
     }
 
     /**
-     * if true allows all hatches to share but energy hatches and rotor holders
-     * defualt true
-     *
-     * @return
+     * Override to disable MultiblockPart sharing for this Multiblock. (Rotor Holders always disallowed).
      */
     public boolean canShare() {
         return true;
+    }
 
+    /**
+     * Used if MultiblockPart Abilities need to be sorted a certain way, like
+     * Distillation Tower and Assembly Line.
+     */
+    protected Function<BlockPos, Integer> multiblockPartSorter() {
+        return BlockPos::hashCode;
     }
 
     protected void checkStructurePattern() {
@@ -186,7 +192,7 @@ protected void checkStructurePattern() {
         if (context != null && !structureFormed) {
             Set<IMultiblockPart> rawPartsSet = context.getOrCreate("MultiblockParts", HashSet::new);
             ArrayList<IMultiblockPart> parts = new ArrayList<>(rawPartsSet);
-            parts.sort(Comparator.comparing(it -> ((MetaTileEntity) it).getPos().hashCode()));
+            parts.sort(Comparator.comparing(it -> multiblockPartSorter().apply(((MetaTileEntity) it).getPos())));
             for (IMultiblockPart part : parts) {
                 if (part.isAttachedToMultiBlock()) {
                     if (!canShare() || part instanceof MetaTileEntityRotorHolder) {

src/main/java/gregtech/common/metatileentities/multi/electric/MetaTileEntityDistillationTower.java

@@ -17,12 +17,14 @@
 import gregtech.common.blocks.MetaBlocks;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.util.ResourceLocation;
+import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.text.ITextComponent;
 import net.minecraft.util.text.TextComponentTranslation;
 import net.minecraftforge.fluids.FluidStack;
 
 import javax.annotation.Nonnull;
 import java.util.List;
+import java.util.function.Function;
 import java.util.function.Predicate;
 
 import static gregtech.api.util.RelativeDirection.*;
@@ -38,6 +40,11 @@ public MetaTileEntity createMetaTileEntity(MetaTileEntityHolder holder) {
         return new MetaTileEntityDistillationTower(metaTileEntityId);
     }
 
+    @Override
+    protected Function<BlockPos, Integer> multiblockPartSorter() {
+        return BlockPos::getY; // todo this needs to be "relative up" with Freedom Wrench
+    }
+
     @Override
     protected void addDisplayText(List<ITextComponent> textList) {
         if (isStructureFormed()) {