added movableTE's with help from @2No2Name

src/main/java/carpet/CarpetSettings.java

@@ -114,7 +114,7 @@ public class CarpetSettings
                                            "Items counted are destroyed, count up to one stack per tick per hopper")
                                 .isACommand().boolAccelerate().defaultFalse(),
   rule("renewableSponges",      "experimental feature", "Guardians turn into Elder Guardian when struck by lightning").wip(),
-  rule("movableTileEntities",   "experimental", "Pistons can push tile entities, like hoppers, chests etc.").boolAccelerate().wip(),
+  rule("movableTileEntities",   "experimental", "Pistons can push tile entities, like hoppers, chests etc.").boolAccelerate(),
   rule("desertShrubs",          "feature", "Saplings turn into dead shrubs in hot climates and no water access when it attempts to grow into a tree").wip(),
   rule("silverFishDropGravel",  "experimental", "Silverfish drop a gravel item when breaking out of a block"),
   rule("summonNaturalLightning","creative", "summoning a lightning bolt has all the side effects of natural lightning"),

src/main/java/carpet/fakes/BlockEntityRenderDispatcherInterface.java

@@ -0,0 +1,8 @@
+package carpet.fakes;
+
+import net.minecraft.block.entity.BlockEntity;
+
+public interface BlockEntityRenderDispatcherInterface
+{
+    void renderBlockEntityOffset(BlockEntity blockEntity, float partialTicks, int destroyStage, double xOffset, double yOffset, double zOffset);
+}

src/main/java/carpet/fakes/PistonBlockEntityInterface.java

@@ -0,0 +1,12 @@
+package carpet.fakes;
+
+import net.minecraft.block.entity.BlockEntity;
+
+public interface PistonBlockEntityInterface
+{
+    void setCarriedBlockEntity(BlockEntity blockEntity);
+    BlockEntity getCarriedBlockEntity();
+    void setRenderCarriedBlockEntity(boolean b);
+    boolean getRenderCarriedBlockEntity();
+    boolean isRenderModeSet();
+}

src/main/java/carpet/fakes/WorldChunkInterface.java

@@ -0,0 +1,10 @@
+package carpet.fakes;
+
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.util.math.BlockPos;
+
+public interface WorldChunkInterface
+{
+    BlockState setBlockStateWithBlockEntity(BlockPos blockPos, BlockState newBlockState, BlockEntity newBlockEntity, boolean boolean1);
+}

src/main/java/carpet/fakes/WorldInterface.java

@@ -1,11 +1,16 @@
 package carpet.fakes;
 
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityType;
+import net.minecraft.util.math.BlockPos;
 
 import java.util.Map;
 
 public interface WorldInterface
 {
     Map<EntityType, Entity> getPrecookedMobs();
+    
+    boolean setBlockStateWithBlockEntity(BlockPos blockPos, BlockState blockState, BlockEntity newBlockEntity, int int1);
 }

src/main/java/carpet/mixins/BlockEntityRenderDispatcher_movableTEMixin.java

@@ -0,0 +1,53 @@
+package carpet.mixins;
+
+import carpet.fakes.BlockEntityRenderDispatcherInterface;
+import com.mojang.blaze3d.platform.GLX;
+import com.mojang.blaze3d.platform.GlStateManager;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.client.render.Camera;
+import net.minecraft.client.render.GuiLighting;
+import net.minecraft.client.render.block.entity.BlockEntityRenderDispatcher;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(BlockEntityRenderDispatcher.class)
+public abstract class BlockEntityRenderDispatcher_movableTEMixin implements BlockEntityRenderDispatcherInterface
+{
+    @Shadow
+    public static double renderOffsetX;
+    @Shadow
+    public static double renderOffsetY;
+    @Shadow
+    public static double renderOffsetZ;
+    @Shadow
+    public Camera cameraEntity;
+    @Shadow
+    public World world;
+    
+    @Shadow
+    public abstract void renderEntity(BlockEntity blockEntity_1, double double_1, double double_2, double double_3,
+            float float_1, int int_1, boolean boolean_1);
+    
+    /**
+     * @author 2No2Name
+     */
+    //Renders the BlockEntity offset by the amount specified in the arguments xOffset yOffset zOffset (the moving block moved in the animation by this)
+    public void renderBlockEntityOffset(BlockEntity blockEntity_1, float partialTicks, int destroyStage, double xOffset,
+            double yOffset, double zOffset)
+    {
+        if (blockEntity_1.getSquaredDistance(this.cameraEntity.getPos().x - xOffset, this.cameraEntity.getPos().y - yOffset,
+                this.cameraEntity.getPos().z - zOffset) < blockEntity_1.getSquaredRenderDistance())
+        {
+            GuiLighting.enable();
+            int i = this.world.getLightmapIndex(blockEntity_1.getPos(), 0);
+            int j = i % 65536;
+            int k = i / 65536;
+            GLX.glMultiTexCoord2f(GLX.GL_TEXTURE1, (float) j, (float) k);
+            GlStateManager.color4f(1.0F, 1.0F, 1.0F, 1.0F);
+            BlockPos blockpos = blockEntity_1.getPos();
+            this.renderEntity(blockEntity_1, (double) blockpos.getX() - renderOffsetX + xOffset, (double) blockpos.getY() - renderOffsetY + yOffset, (double) blockpos.getZ() - renderOffsetZ + zOffset, partialTicks, destroyStage, false);
+        }
+    }
+}

src/main/java/carpet/mixins/PistonBlockEntityRenderer_movableTEMixin.java

@@ -0,0 +1,42 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.fakes.BlockEntityRenderDispatcherInterface;
+import carpet.fakes.PistonBlockEntityInterface;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.entity.PistonBlockEntity;
+import net.minecraft.client.render.block.entity.BlockEntityRenderDispatcher;
+import net.minecraft.client.render.block.entity.BlockEntityRenderer;
+import net.minecraft.client.render.block.entity.PistonBlockEntityRenderer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(PistonBlockEntityRenderer.class)
+public abstract class PistonBlockEntityRenderer_movableTEMixin extends BlockEntityRenderer<PistonBlockEntity>
+{
+    @Inject(method = "method_3576", at = @At(value = "INVOKE",
+            target = "Lnet/minecraft/client/render/block/entity/PistonBlockEntityRenderer;method_3575(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/BlockState;Lnet/minecraft/client/render/BufferBuilder;Lnet/minecraft/world/World;Z)Z", ordinal = 3))
+    private void updateRenderBool(PistonBlockEntity pistonBlockEntity_1, double double_1, double double_2,
+            double double_3, float float_1, int int_1, CallbackInfo ci)
+    {
+        if (!((PistonBlockEntityInterface) pistonBlockEntity_1).isRenderModeSet())
+            ((PistonBlockEntityInterface) pistonBlockEntity_1).setRenderCarriedBlockEntity(CarpetSettings.b_movableTileEntities && ((PistonBlockEntityInterface) pistonBlockEntity_1).getCarriedBlockEntity() != null);
+    }
+    
+    @Inject(method = "method_3576", at = @At("RETURN"))
+    private void endMethod3576(PistonBlockEntity pistonBlockEntity_1, double double_1, double double_2, double double_3,
+            float float_1, int int_1, CallbackInfo ci)
+    {
+        if (((PistonBlockEntityInterface) pistonBlockEntity_1).getRenderCarriedBlockEntity())
+        {
+            BlockEntity carriedBlockEntity = ((PistonBlockEntityInterface) pistonBlockEntity_1).getCarriedBlockEntity();
+            if (carriedBlockEntity != null)
+            {
+                carriedBlockEntity.setPos(pistonBlockEntity_1.getPos());
+                ((BlockEntityRenderDispatcherInterface) BlockEntityRenderDispatcher.INSTANCE).renderBlockEntityOffset(carriedBlockEntity, float_1, int_1, pistonBlockEntity_1.getRenderOffsetX(float_1), pistonBlockEntity_1.getRenderOffsetY(float_1), pistonBlockEntity_1.getRenderOffsetZ(float_1));
+            }
+        }
+    }
+}

src/main/java/carpet/mixins/PistonBlockEntity_movableTEMixin.java

@@ -0,0 +1,139 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.fakes.PistonBlockEntityInterface;
+import carpet.fakes.WorldInterface;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockEntityProvider;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.entity.BlockEntityType;
+import net.minecraft.block.entity.PistonBlockEntity;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(PistonBlockEntity.class)
+public abstract class PistonBlockEntity_movableTEMixin extends BlockEntity implements PistonBlockEntityInterface
+{
+    @Shadow
+    private boolean source;
+    @Shadow
+    private BlockState pushedBlock;
+    
+    private BlockEntity carriedBlockEntity;
+    private boolean renderCarriedBlockEntity = false;
+    private boolean renderSet = false;
+    
+    public PistonBlockEntity_movableTEMixin(BlockEntityType<?> blockEntityType_1)
+    {
+        super(blockEntityType_1);
+    }
+    
+    
+    /**
+     * @author 2No2Name
+     */
+    public BlockEntity getCarriedBlockEntity()
+    {
+        return carriedBlockEntity;
+    }
+    
+    public void setCarriedBlockEntity(BlockEntity blockEntity)
+    {
+        this.carriedBlockEntity = blockEntity;
+        if (this.carriedBlockEntity != null)
+            this.carriedBlockEntity.setPos(this.pos);
+    }
+    
+    public boolean isRenderModeSet()
+    {
+        return renderSet;
+    }
+    
+    public boolean getRenderCarriedBlockEntity()
+    {
+        return renderCarriedBlockEntity;
+    }
+    
+    public void setRenderCarriedBlockEntity(boolean b)
+    {
+        renderCarriedBlockEntity = b;
+        renderSet = true;
+    }
+    
+    /**
+     * @author 2No2Name
+     */
+    @Redirect(method = "tick", at = @At(value = "INVOKE",
+              target = "Lnet/minecraft/world/World;setBlockState(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/BlockState;I)Z"))
+    private boolean movableTEsetBlockState0(World world, BlockPos blockPos_1, BlockState blockAState_2, int int_1)
+    {
+        if (!CarpetSettings.b_movableTileEntities)
+            return world.setBlockState(blockPos_1, blockAState_2, int_1);
+        else
+            return ((WorldInterface) (world)).setBlockStateWithBlockEntity(blockPos_1, blockAState_2, this.carriedBlockEntity, int_1);
+    }
+    
+    @Redirect(method = "finish", at = @At(value = "INVOKE",
+              target = "Lnet/minecraft/world/World;setBlockState(Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/BlockState;I)Z"))
+    private boolean movableTEsetBlockState1(World world, BlockPos blockPos_1, BlockState blockState_2, int int_1)
+    {
+        if (!CarpetSettings.b_movableTileEntities)
+            return world.setBlockState(blockPos_1, blockState_2, int_1);
+        else
+        {
+            boolean ret = ((WorldInterface) (world)).setBlockStateWithBlockEntity(blockPos_1, blockState_2, this.carriedBlockEntity, int_1);
+            this.carriedBlockEntity = null; //this will cancel the finishHandleBroken
+            return ret;
+        }
+    }
+    
+    @Inject(method = "finish", at = @At(value = "RETURN"))
+    private void finishHandleBroken(CallbackInfo cir)
+    {
+        //Handle TNT Explosions or other ways the moving Block is broken
+        //Also /setblock will cause this to be called, and drop e.g. a moving chest's contents.
+        // This is MC-40380 (BlockEntities that aren't Inventories drop stuff when setblock is called )
+        if (CarpetSettings.b_movableTileEntities && this.carriedBlockEntity != null && !this.world.isClient && this.world.getBlockState(this.pos).getBlock() == Blocks.AIR)
+        {
+            BlockState blockState_2;
+            if (this.source)
+                blockState_2 = Blocks.AIR.getDefaultState();
+            else
+                blockState_2 = Block.getRenderingState(this.pushedBlock, this.world, this.pos);
+            ((WorldInterface) (this.world)).setBlockStateWithBlockEntity(this.pos, blockState_2, this.carriedBlockEntity, 3);
+            this.world.breakBlock(this.pos, true);
+        }
+    }
+    
+    @Inject(method = "fromTag", at = @At(value = "TAIL"))
+    private void onFromTag(CompoundTag compoundTag_1, CallbackInfo ci)
+    {
+        if (CarpetSettings.b_movableTileEntities && compoundTag_1.containsKey("carriedTileEntity", 10))
+        {
+            if (this.pushedBlock.getBlock() instanceof BlockEntityProvider)
+                this.carriedBlockEntity = ((BlockEntityProvider) (this.pushedBlock.getBlock())).createBlockEntity(this.world);
+            if (carriedBlockEntity != null) //Can actually be null, as BlockPistonMoving.createNewTileEntity(...) returns null
+                this.carriedBlockEntity.fromTag(compoundTag_1.getCompound("carriedTileEntity"));
+        }
+    }
+    
+    @Inject(method = "toTag", at = @At(value = "RETURN", shift = At.Shift.BEFORE))
+    private void onToTag(CompoundTag compoundTag_1, CallbackInfoReturnable<CompoundTag> cir)
+    {
+        if (CarpetSettings.b_movableTileEntities && this.carriedBlockEntity != null)
+        {
+            //Leave name "carriedTileEntity" instead of "carriedBlockEntity" for upgrade compatibility with 1.12 movable TE
+            compoundTag_1.put("carriedTileEntity", this.carriedBlockEntity.toTag(new CompoundTag()));
+        }
+    }
+}

src/main/java/carpet/mixins/PistonBlock_movableTEMixin.java

@@ -0,0 +1,123 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.fakes.PistonBlockEntityInterface;
+import com.google.common.collect.Lists;
+import net.minecraft.block.*;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.piston.PistonHandler;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.Redirect;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
+
+import java.util.List;
+import java.util.Set;
+
+@Mixin(PistonBlock.class)
+public abstract class PistonBlock_movableTEMixin extends FacingBlock
+{
+    protected PistonBlock_movableTEMixin(Settings block$Settings_1)
+    {
+        super(block$Settings_1);
+    }
+    
+    private ThreadLocal<List<BlockEntity>> list1_BlockEntities = new ThreadLocal<>(); //Unneccessary ThreadLocal if client and server use different PistonBlock instances
+    
+    @Inject(method = "isMovable", at = @At(value = "RETURN", ordinal = 3, shift = At.Shift.BEFORE))
+    private static void movableCMD(BlockState blockState_1, World world_1, BlockPos blockPos_1,
+            Direction direction_1, boolean boolean_1, Direction direction_2, CallbackInfoReturnable<Boolean> cir)
+    {
+        Block block_1 = blockState_1.getBlock();
+        //Make CommandBlocks movable, either use instanceof CommandBlock or the 3 cmd block objects,
+        if (CarpetSettings.b_movableTileEntities && block_1 instanceof CommandBlock)
+        {
+            cir.setReturnValue(true);
+        }
+    }
+    
+    private static boolean isPushableTileEntityBlock(Block block)
+    {
+        //Making PISTON_EXTENSION (BlockPistonMoving) pushable would not work as its createNewTileEntity()-method returns null
+        return block != Blocks.ENDER_CHEST && block != Blocks.ENCHANTING_TABLE &&
+                       block != Blocks.END_GATEWAY && block != Blocks.END_PORTAL && block != Blocks.MOVING_PISTON  &&
+                       block != Blocks.SPAWNER;
+    }
+    
+    @Redirect(method = "isMovable", at = @At(value = "INVOKE", target = "Lnet/minecraft/block/Block;hasBlockEntity()Z"))
+    private static boolean ifHasBlockEntity(Block block)
+    {
+        if (!block.hasBlockEntity())
+        {
+            return !true;
+        }
+        else
+        {
+            return !(CarpetSettings.b_movableTileEntities && isPushableTileEntityBlock(block));
+        }
+    }
+    @Inject(method = "move", at = @At(value = "INVOKE", shift = At.Shift.BEFORE,
+            target = "Ljava/util/List;size()I", ordinal = 4),locals = LocalCapture.CAPTURE_FAILHARD)
+    private void onMove(World world_1, BlockPos blockPos_1, Direction direction_1, boolean boolean_1,
+            CallbackInfoReturnable<Boolean> cir, BlockPos blockPos_2, PistonHandler pistonHandler_1,
+            List<BlockPos> list_1, List<BlockState> list_2, List list_3, int int_2, BlockState blockStates_1[],
+            Direction direction_2, Set set_1)
+    {
+        //Get the blockEntities and remove them from the world before any magic starts to happen
+        if (CarpetSettings.b_movableTileEntities)
+        {
+            list1_BlockEntities.set(Lists.<BlockEntity>newArrayList());
+            for (int i = 0; i < list_1.size(); ++i)
+            {
+                BlockPos blockpos = list_1.get(i);
+                BlockEntity blockEntity = (list_2.get(i).getBlock().hasBlockEntity()) ? world_1.getBlockEntity(blockpos) : null;
+                list1_BlockEntities.get().add(blockEntity);
+                if (blockEntity != null)
+                {
+                    //hopefully this call won't have any side effects in the future, such as dropping all the BlockEntity's items
+                    //we want to place this same(!) BlockEntity object into the world later when the movement stops again
+                    world_1.removeBlockEntity(blockpos);
+                    blockEntity.markDirty();
+                }
+            }
+        }
+    }
+    
+    @Inject(method = "move", at = @At(value = "INVOKE", shift = At.Shift.BEFORE,
+            target = "Lnet/minecraft/world/World;setBlockEntity(Lnet/minecraft/util/math/BlockPos;" +
+                             "Lnet/minecraft/block/entity/BlockEntity;)V", ordinal = 0),
+            locals = LocalCapture.CAPTURE_FAILHARD)
+    private void setBlockEntityWithCarried(World world_1, BlockPos blockPos_1, Direction direction_1, boolean boolean_1,
+            CallbackInfoReturnable<Boolean> cir, BlockPos blockPos_2, PistonHandler pistonHandler_1, List list_1,
+            List list_2, List list_3, int int_2, BlockState blockStates_1[], Direction direction_2, Set set_1,
+            int int_3, BlockPos blockPos_4, BlockState blockState_1)
+    {
+        BlockEntity blockEntityPiston = PistonExtensionBlock.createBlockEntityPiston((BlockState) list_2.get(int_3),
+                direction_1, boolean_1, false);
+        if (CarpetSettings.b_movableTileEntities)
+            ((PistonBlockEntityInterface) blockEntityPiston).setCarriedBlockEntity(list1_BlockEntities.get().get(int_3));
+        world_1.setBlockEntity(blockPos_4, blockEntityPiston);
+    }
+    
+    @Redirect(method = "move", at = @At(value = "INVOKE",
+            target = "Lnet/minecraft/world/World;setBlockEntity(Lnet/minecraft/util/math/BlockPos;" +
+                             "Lnet/minecraft/block/entity/BlockEntity;)V",
+            ordinal = 0))
+    private void dontDoAnything(World world, BlockPos blockPos_6, BlockEntity blockEntityPiston)
+    {
+    }
+    
+    @Redirect(method = "move", at = @At(value = "INVOKE",
+            target = "Lnet/minecraft/block/PistonExtensionBlock;createBlockEntityPiston(Lnet/minecraft/block/BlockState;" +
+                             "Lnet/minecraft/util/math/Direction;ZZ)Lnet/minecraft/block/entity/BlockEntity;",
+            ordinal = 0))
+    private BlockEntity returnNull(BlockState blockState_1, Direction direction_1, boolean boolean_1, boolean boolean_2)
+    {
+        return null;
+    }
+}

src/main/java/carpet/mixins/WorldChunk_movableTEMixin.java

@@ -0,0 +1,158 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.fakes.WorldChunkInterface;
+import com.sun.istack.internal.Nullable;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockEntityProvider;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.PistonExtensionBlock;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.Heightmap;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.ChunkSection;
+import net.minecraft.world.chunk.WorldChunk;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.util.Map;
+
+import static net.minecraft.world.chunk.WorldChunk.EMPTY_SECTION;
+
+@Mixin(WorldChunk.class)
+public abstract class WorldChunk_movableTEMixin implements WorldChunkInterface
+{
+    @Shadow
+    @Final
+    private ChunkSection[] sections;
+    @Shadow
+    @Final
+    private Map<Heightmap.Type, Heightmap> heightmaps;
+    @Shadow
+    private boolean shouldSave;
+    @Shadow
+    @Final
+    private World world;
+    
+    @Shadow
+    @Nullable
+    public abstract BlockEntity getBlockEntity(BlockPos blockPos_1, WorldChunk.CreationType worldChunk$CreationType_1);
+    
+    // Fix Failure: If a moving BlockEntity is placed while BlockEntities are ticking, this will not find it and then replace it with a new TileEntity!
+    // blockEntity_2 = this.getBlockEntity(blockPos_1, WorldChunk.CreationType.CHECK);
+    @Redirect(method = "setBlockState", at = @At(value = "INVOKE", ordinal = 1,
+            target = "Lnet/minecraft/world/chunk/WorldChunk;getBlockEntity(Lnet/minecraft/util/math/BlockPos;" + "Lnet/minecraft/world/chunk/WorldChunk$CreationType;)" + "Lnet/minecraft/block/entity/BlockEntity;"))
+    private BlockEntity ifGetBlockEntity(WorldChunk worldChunk, BlockPos blockPos_1,
+            WorldChunk.CreationType worldChunk$CreationType_1)
+    {
+        if (!CarpetSettings.b_movableTileEntities)
+        {
+            return this.getBlockEntity(blockPos_1, WorldChunk.CreationType.CHECK);
+        }
+        else
+        {
+            return this.world.getBlockEntity(blockPos_1);
+        }
+    }
+    
+    
+    /**
+     * Sets the Blockstate and the BlockEntity.
+     * Only sets BlockEntity if Block is BlockEntityProvider, but doesn't check if it actually matches (e.g. can assign beacon to chest entity).
+     *
+     * @author 2No2Name
+     */
+    @Nullable
+    public BlockState setBlockStateWithBlockEntity(BlockPos blockPos_1, BlockState newBlockState, BlockEntity newBlockEntity,
+            boolean boolean_1)
+    {
+        int x = blockPos_1.getX() & 15;
+        int y = blockPos_1.getY();
+        int z = blockPos_1.getZ() & 15;
+        ChunkSection chunkSection = this.sections[y >> 4];
+        if (chunkSection == EMPTY_SECTION)
+        {
+            if (newBlockState.isAir())
+            {
+                return null;
+            }
+            
+            chunkSection = new ChunkSection(y >> 4 << 4);
+            this.sections[y >> 4] = chunkSection;
+        }
+        
+        boolean boolean_2 = chunkSection.isEmpty();
+        BlockState oldBlockState = chunkSection.setBlockState(x, y & 15, z, newBlockState);
+        if (oldBlockState == newBlockState)
+        {
+            return null;
+        }
+        else
+        {
+            Block newBlock = newBlockState.getBlock();
+            Block oldBlock = oldBlockState.getBlock();
+            ((Heightmap) this.heightmaps.get(Heightmap.Type.MOTION_BLOCKING)).trackUpdate(x, y, z, newBlockState);
+            ((Heightmap) this.heightmaps.get(Heightmap.Type.MOTION_BLOCKING_NO_LEAVES)).trackUpdate(x, y, z, newBlockState);
+            ((Heightmap) this.heightmaps.get(Heightmap.Type.OCEAN_FLOOR)).trackUpdate(x, y, z, newBlockState);
+            ((Heightmap) this.heightmaps.get(Heightmap.Type.WORLD_SURFACE)).trackUpdate(x, y, z, newBlockState);
+            boolean boolean_3 = chunkSection.isEmpty();
+            if (boolean_2 != boolean_3)
+            {
+                this.world.getChunkManager().getLightingProvider().updateSectionStatus(blockPos_1, boolean_3);
+            }
+            
+            if (!this.world.isClient)
+            {
+                if (!(oldBlock instanceof PistonExtensionBlock))//this is a movableTE special case, if condition wasn't there it would remove the blockentity that was carried for some reason
+                    oldBlockState.onBlockRemoved(this.world, blockPos_1, newBlockState, boolean_1);//this kills it
+            }
+            else if (oldBlock != newBlock && oldBlock instanceof BlockEntityProvider)
+            {
+                this.world.removeBlockEntity(blockPos_1);
+            }
+            
+            if (chunkSection.getBlockState(x, y & 15, z).getBlock() != newBlock)
+            {
+                return null;
+            }
+            else
+            {
+                BlockEntity oldBlockEntity = null;
+                if (oldBlock instanceof BlockEntityProvider)
+                {
+                    oldBlockEntity = this.getBlockEntity(blockPos_1, WorldChunk.CreationType.CHECK);
+                    if (oldBlockEntity != null)
+                    {
+                        oldBlockEntity.resetBlock();
+                    }
+                }
+                
+                if (newBlock instanceof BlockEntityProvider)
+                {
+                    if (newBlockEntity == null)
+                    {
+                        newBlockEntity = ((BlockEntityProvider) newBlock).createBlockEntity(this.world);
+                    }
+                    if (newBlockEntity != oldBlockEntity && newBlockEntity != null)
+                    {
+                        newBlockEntity.validate();
+                        this.world.setBlockEntity(blockPos_1, newBlockEntity);
+                        newBlockEntity.resetBlock();
+                    }
+                }
+                
+                if (!this.world.isClient)
+                {
+                    newBlockState.onBlockAdded(this.world, blockPos_1, oldBlockState, boolean_1); //This can call setblockstate! (e.g. hopper does)
+                }
+                
+                this.shouldSave = true;
+                return oldBlockState;
+            }
+        }
+    }
+}

src/main/java/carpet/mixins/World_movableTEMixin.java

@@ -0,0 +1,137 @@
+package carpet.mixins;
+
+import carpet.fakes.WorldChunkInterface;
+import carpet.fakes.WorldInterface;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockEntityProvider;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.server.world.ChunkHolder;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.profiler.Profiler;
+import net.minecraft.world.BlockView;
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.ChunkManager;
+import net.minecraft.world.chunk.EmptyChunk;
+import net.minecraft.world.chunk.WorldChunk;
+import net.minecraft.world.level.LevelGeneratorType;
+import net.minecraft.world.level.LevelProperties;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+@Mixin(World.class)
+public abstract class World_movableTEMixin implements WorldInterface
+{
+    @Shadow
+    @Final
+    public boolean isClient;
+    @Shadow
+    @Final
+    protected LevelProperties properties;
+    @Shadow
+    @Final
+    private Profiler profiler;
+
+    @Shadow
+    protected abstract WorldChunk getWorldChunk(BlockPos blockPos_1);
+    
+    @Shadow
+    public abstract BlockState getBlockState(BlockPos blockPos_1);
+    
+    @Shadow
+    public abstract ChunkManager getChunkManager();
+    
+    @Shadow
+    public abstract void scheduleBlockRender(BlockPos blockPos_1);
+    
+    @Shadow
+    public abstract void updateListeners(BlockPos var1, BlockState var2, BlockState var3, int var4);
+    
+    @Shadow
+    public abstract void updateNeighbors(BlockPos blockPos_1, Block block_1);
+    
+    @Shadow
+    public abstract void updateHorizontalAdjacent(BlockPos blockPos_1, Block block_1);
+    
+    @Shadow
+    public abstract void onBlockChanged(BlockPos blockPos_1, BlockState blockState_1, BlockState blockState_2);
+    
+    /**
+     * @author 2No2Name
+     */
+    public boolean setBlockStateWithBlockEntity(BlockPos blockPos_1, BlockState blockState_1, BlockEntity newBlockEntity, int int_1)
+    {
+        if ((Object) this instanceof EmptyChunk)
+            return false;
+        
+        if (World.isHeightInvalid(blockPos_1))
+        {
+            return false;
+        }
+        else if (!this.isClient && this.properties.getGeneratorType() == LevelGeneratorType.DEBUG_ALL_BLOCK_STATES)
+        {
+            return false;
+        }
+        else
+        {
+            WorldChunk worldChunk_1 = this.getWorldChunk(blockPos_1);
+            Block block_1 = blockState_1.getBlock();
+            
+            BlockState blockState_2;
+            if (newBlockEntity != null && block_1 instanceof BlockEntityProvider)
+                blockState_2 = ((WorldChunkInterface) worldChunk_1).setBlockStateWithBlockEntity(blockPos_1, blockState_1, newBlockEntity, (int_1 & 64) != 0);
+            else
+                blockState_2 = worldChunk_1.setBlockState(blockPos_1, blockState_1, (int_1 & 64) != 0);
+            
+            if (blockState_2 == null)
+            {
+                return false;
+            }
+            else
+            {
+                BlockState blockState_3 = this.getBlockState(blockPos_1);
+                
+                if (blockState_3 != blockState_2 && (blockState_3.getLightSubtracted((BlockView) this, blockPos_1) != blockState_2.getLightSubtracted((BlockView) this, blockPos_1) || blockState_3.getLuminance() != blockState_2.getLuminance() || blockState_3.hasSidedTransparency() || blockState_2.hasSidedTransparency()))
+                {
+                    this.profiler.push("queueCheckLight");
+                    this.getChunkManager().getLightingProvider().enqueueLightUpdate(blockPos_1);
+                    this.profiler.pop();
+                }
+                
+                if (blockState_3 == blockState_1)
+                {
+                    if (blockState_2 != blockState_3)
+                    {
+                        this.scheduleBlockRender(blockPos_1);
+                    }
+                    
+                    if ((int_1 & 2) != 0 && (!this.isClient || (int_1 & 4) == 0) && (this.isClient || worldChunk_1.getLevelType() != null && worldChunk_1.getLevelType().isAfter(ChunkHolder.LevelType.TICKING)))
+                    {
+                        this.updateListeners(blockPos_1, blockState_2, blockState_1, int_1);
+                    }
+                    
+                    if (!this.isClient && (int_1 & 1) != 0)
+                    {
+                        this.updateNeighbors(blockPos_1, blockState_2.getBlock());
+                        if (blockState_1.hasComparatorOutput())
+                        {
+                            this.updateHorizontalAdjacent(blockPos_1, block_1);
+                        }
+                    }
+                    
+                    if ((int_1 & 16) == 0)
+                    {
+                        int int_2 = int_1 & -2;
+                        blockState_2.method_11637((net.minecraft.world.IWorld) this, blockPos_1, int_2);
+                        blockState_1.updateNeighborStates((net.minecraft.world.IWorld) this, blockPos_1, int_2);
+                        blockState_1.method_11637((net.minecraft.world.IWorld) this, blockPos_1, int_2);
+                    }
+                    
+                    this.onBlockChanged(blockPos_1, blockState_2, blockState_3);
+                }
+                return true;
+            }
+        }
+    }
+}