Plane Connection Refactor (#4556) (#4565)

* Refactors all plane parts to use a common helper for
calculating connections to adjacent planes.
Also fixes problems with updating these connections on neighbor updates.

* Fix conflicting GuiSync ID.

* Slightly refactor PlaneConnectionHelper, and fix an issue where the bounding box was calculated incorrectly by using the wrong up-direction.

(cherry picked from commit 8617dc8340)

.github/workflows/branches.yml

@@ -22,14 +22,14 @@ jobs:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
       - name: Clean gradle
-        run: ./gradlew clean --no-daemon
+        run: ./gradlew clean --no-daemon --max-workers 1
       - name: Validate no assets
         run: test ! -d ./src/generated
       - name: Generate assets
         uses: GabrielBB/xvfb-action@v1.2
         with:
-          run: ./gradlew runData --no-daemon
+          run: ./gradlew runData --no-daemon --max-workers 1
       - name: Validate assets
         run: test -d ./src/generated -a -f ./src/generated/resources/.cache/cache
       - name: Build with Gradle
-        run: ./gradlew build --no-daemon
+        run: ./gradlew build --no-daemon --max-workers 1

.github/workflows/master.yml

@@ -22,14 +22,14 @@ jobs:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
       - name: Clean gradle
-        run: ./gradlew clean --no-daemon
+        run: ./gradlew clean --no-daemon --max-workers 1
       - name: Validate no assets
         run: test ! -d ./src/generated
       - name: Generate assets
         uses: GabrielBB/xvfb-action@v1.2
         with:
-          run: ./gradlew runData --no-daemon
+          run: ./gradlew runData --no-daemon --max-workers 1
       - name: Validate assets
         run: test -d ./src/generated -a -f ./src/generated/resources/.cache/cache
       - name: Build with Gradle
-        run: ./gradlew build --no-daemon
+        run: ./gradlew build --no-daemon --max-workers 1

.github/workflows/pull_requests.yml

@@ -22,19 +22,19 @@ jobs:
           path: ~/.gradle/caches
           key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
       - name: Clean gradle
-        run: ./gradlew clean --no-daemon
+        run: ./gradlew clean --no-daemon --max-workers 1
       - name: Validate no assets
         run: test ! -d ./src/generated
       - name: Generate assets
         uses: GabrielBB/xvfb-action@v1.2
         with:
-          run: ./gradlew runData --no-daemon
+          run: ./gradlew runData --no-daemon --max-workers 1
       - name: Validate assets
         run: test -d ./src/generated -a -f ./src/generated/resources/.cache/cache
       - name: Build with Gradle
         env:
           PR_NUMBER: ${{ github.event.pull_request.number }}
-        run: ./gradlew build --no-daemon
+        run: ./gradlew build --no-daemon --max-workers 1
       - uses: actions/upload-artifact@v2
         with:
           name: dist

.github/workflows/release.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Generate assets
         uses: GabrielBB/xvfb-action@v1.2
         with:
-          run: ./gradlew runData --no-daemon
+          run: ./gradlew runData --no-daemon --max-workers 1
       - name: Validate assets
         run: test -d ./src/generated -a -f ./src/generated/resources/.cache/cache
       - name: Build with Gradle
@@ -42,7 +42,7 @@ jobs:
           KEY_STORE_ALIAS: ${{ secrets.KEY_STORE_ALIAS }}
           KEY_STORE_KEY_PASS: ${{ secrets.KEY_STORE_KEY_PASS }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: ./gradlew build --no-daemon
+        run: ./gradlew build --no-daemon --max-workers 1
       - name: Upload to curseforge
         env:
           KEY_STORE_PASS: ${{ secrets.KEY_STORE_PASS }}
@@ -50,14 +50,14 @@ jobs:
           KEY_STORE_KEY_PASS: ${{ secrets.KEY_STORE_KEY_PASS }}
           CHANGELOG: ${{ github.event.release.body }}
           CURSEFORGE: ${{ secrets.CURSEFORGE }}
-        run: ./gradlew curseforge --no-daemon
+        run: ./gradlew curseforge --no-daemon --max-workers 1
       - name: Publish to github packages
         env:
           KEY_STORE_PASS: ${{ secrets.KEY_STORE_PASS }}
           KEY_STORE_ALIAS: ${{ secrets.KEY_STORE_ALIAS }}
           KEY_STORE_KEY_PASS: ${{ secrets.KEY_STORE_KEY_PASS }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: ./gradlew publish --no-daemon
+        run: ./gradlew publish --no-daemon --max-workers 1
       - name: Prepare artifact metadata
         id: prepare_artifact_metadata
         run: |

src/api/java/appeng/api/parts/IPart.java

@@ -50,6 +50,7 @@ import net.minecraftforge.api.distmarker.OnlyIn;
 import net.minecraftforge.client.model.data.EmptyModelData;
 import net.minecraftforge.client.model.data.IModelData;
 import net.minecraftforge.common.capabilities.Capability;
+import net.minecraftforge.common.capabilities.CapabilityProvider;
 import net.minecraftforge.common.util.LazyOptional;
 
 import appeng.api.networking.IGridNode;
@@ -346,10 +347,12 @@ public interface IPart extends ICustomCableConnection {
      * capabilities on the cable bus will be forwarded to parts on the appropriate
      * side.
      *
-     * @see TileEntity#getCapability(Capability, net.minecraft.util.Direction)
+     * @see CapabilityProvider#getCapability(Capability,
+     *      net.minecraft.util.Direction)
      *
-     * @return The capability or null.
+     * @return The capability
      */
+    @Nonnull
     default <T> LazyOptional<T> getCapability(Capability<T> capabilityClass) {
         return LazyOptional.empty();
     }

src/main/java/appeng/client/gui/AEBaseScreen.java

@@ -154,14 +154,14 @@ public abstract class AEBaseScreen<T extends AEBaseContainer> extends ContainerS
 
     protected void drawGuiSlot(CustomSlotWidget slot, int mouseX, int mouseY, float partialTicks) {
         if (slot.isSlotEnabled()) {
-            final int left = slot.xPos();
-            final int top = slot.yPos();
-            final int right = left + slot.getWidth();
-            final int bottom = top + slot.getHeight();
+            final int left = slot.getTooltipAreaX();
+            final int top = slot.getTooltipAreaY();
+            final int right = left + slot.getTooltipAreaWidth();
+            final int bottom = top + slot.getTooltipAreaHeight();
 
             slot.drawContent(getMinecraft(), mouseX, mouseY, partialTicks);
 
-            if (this.isPointInRegion(left, top, slot.getWidth(), slot.getHeight(), mouseX, mouseY)
+            if (this.isPointInRegion(left, top, slot.getTooltipAreaWidth(), slot.getTooltipAreaHeight(), mouseX, mouseY)
                     && slot.canClick(getPlayer())) {
                 RenderSystem.colorMask(true, true, true, false);
                 this.fillGradient(left, top, right, bottom, -2130706433, -2130706433);
@@ -171,16 +171,16 @@ public abstract class AEBaseScreen<T extends AEBaseContainer> extends ContainerS
     }
 
     private void drawTooltip(ITooltip tooltip, int mouseX, int mouseY) {
-        final int x = tooltip.xPos(); // ((GuiImgButton) c).x;
-        int y = tooltip.yPos(); // ((GuiImgButton) c).y;
+        final int x = tooltip.getTooltipAreaX();
+        int y = tooltip.getTooltipAreaY();
 
-        if (x < mouseX && x + tooltip.getWidth() > mouseX && tooltip.isVisible()) {
-            if (y < mouseY && y + tooltip.getHeight() > mouseY) {
+        if (x < mouseX && x + tooltip.getTooltipAreaWidth() > mouseX && tooltip.isTooltipAreaVisible()) {
+            if (y < mouseY && y + tooltip.getTooltipAreaHeight() > mouseY) {
                 if (y < 15) {
                     y = 15;
                 }
 
-                final String msg = tooltip.getMessage();
+                final String msg = tooltip.getTooltipMessage();
                 if (msg != null && !msg.isEmpty()) {
                     this.drawTooltip(x + 11, y + 4, msg);
                 }
@@ -275,8 +275,8 @@ public abstract class AEBaseScreen<T extends AEBaseContainer> extends ContainerS
         }
 
         for (CustomSlotWidget slot : this.guiSlots) {
-            if (this.isPointInRegion(slot.xPos(), slot.yPos(), slot.getWidth(), slot.getHeight(), xCoord, yCoord)
-                    && slot.canClick(getPlayer())) {
+            if (this.isPointInRegion(slot.getTooltipAreaX(), slot.getTooltipAreaY(), slot.getTooltipAreaWidth(),
+                    slot.getTooltipAreaHeight(), xCoord, yCoord) && slot.canClick(getPlayer())) {
                 slot.slotClicked(getPlayer().inventory.getItemStack(), btn);
             }
         }

src/main/java/appeng/client/gui/widgets/ActionButton.java

@@ -24,7 +24,7 @@ import java.util.regex.Pattern;
 import appeng.api.config.ActionItems;
 import appeng.core.localization.ButtonToolTips;
 
-public class ActionButton extends IconButton implements ITooltip {
+public class ActionButton extends IconButton {
     private static final Pattern PATTERN_NEW_LINE = Pattern.compile("\\n", Pattern.LITERAL);
     private final int iconIndex;
 

src/main/java/appeng/client/gui/widgets/CustomSlotWidget.java

@@ -34,32 +34,32 @@ public abstract class CustomSlotWidget extends AbstractGui implements ITooltip {
     }
 
     @Override
-    public String getMessage() {
+    public String getTooltipMessage() {
         return null;
     }
 
     @Override
-    public int xPos() {
+    public int getTooltipAreaX() {
         return this.x;
     }
 
     @Override
-    public int yPos() {
+    public int getTooltipAreaY() {
         return this.y;
     }
 
     @Override
-    public int getWidth() {
+    public int getTooltipAreaWidth() {
         return 16;
     }
 
     @Override
-    public int getHeight() {
+    public int getTooltipAreaHeight() {
         return 16;
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return false;
     }
 

src/main/java/appeng/client/gui/widgets/ITooltip.java

@@ -28,38 +28,38 @@ public interface ITooltip {
      *
      * @return tooltip message
      */
-    String getMessage();
+    String getTooltipMessage();
 
     /**
      * x Location for the object that triggers the tooltip.
      *
      * @return xPosition
      */
-    int xPos();
+    int getTooltipAreaX();
 
     /**
      * y Location for the object that triggers the tooltip.
      *
      * @return yPosition
      */
-    int yPos();
+    int getTooltipAreaY();
 
     /**
      * Width of the object that triggers the tooltip.
      *
      * @return width
      */
-    int getWidth();
+    int getTooltipAreaWidth();
 
     /**
      * Height for the object that triggers the tooltip.
      *
      * @return height
      */
-    int getHeight();
+    int getTooltipAreaHeight();
 
     /**
      * @return true if button being drawn
      */
-    boolean isVisible();
+    boolean isTooltipAreaVisible();
 }

src/main/java/appeng/client/gui/widgets/IconButton.java

@@ -95,27 +95,32 @@ public abstract class IconButton extends Button implements ITooltip {
     protected abstract int getIconIndex();
 
     @Override
-    public int xPos() {
+    public String getTooltipMessage() {
+        return getMessage();
+    }
+
+    @Override
+    public int getTooltipAreaX() {
         return this.x;
     }
 
     @Override
-    public int yPos() {
+    public int getTooltipAreaY() {
         return this.y;
     }
 
     @Override
-    public int getWidth() {
+    public int getTooltipAreaWidth() {
         return this.halfSize ? 8 : 16;
     }
 
     @Override
-    public int getHeight() {
+    public int getTooltipAreaHeight() {
         return this.halfSize ? 8 : 16;
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return this.visible;
     }
 

src/main/java/appeng/client/gui/widgets/ProgressBar.java

@@ -76,7 +76,7 @@ public class ProgressBar extends Widget implements ITooltip {
     }
 
     @Override
-    public String getMessage() {
+    public String getTooltipMessage() {
         if (this.fullMsg != null) {
             return this.fullMsg;
         }
@@ -86,27 +86,27 @@ public class ProgressBar extends Widget implements ITooltip {
     }
 
     @Override
-    public int xPos() {
+    public int getTooltipAreaX() {
         return this.x - 2;
     }
 
     @Override
-    public int yPos() {
+    public int getTooltipAreaY() {
         return this.y - 2;
     }
 
     @Override
-    public int getWidth() {
+    public int getTooltipAreaWidth() {
         return this.width + 4;
     }
 
     @Override
-    public int getHeight() {
+    public int getTooltipAreaHeight() {
         return this.height + 4;
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return true;
     }
 

src/main/java/appeng/client/gui/widgets/SettingToggleButton.java

@@ -278,7 +278,7 @@ public class SettingToggleButton<T extends Enum<T>> extends IconButton {
     }
 
     @Override
-    public String getMessage() {
+    public String getTooltipMessage() {
         ITextComponent displayName = null;
         ITextComponent displayValue = null;
 

src/main/java/appeng/client/gui/widgets/TabButton.java

@@ -97,27 +97,32 @@ public class TabButton extends Button implements ITooltip {
     }
 
     @Override
-    public int xPos() {
+    public String getTooltipMessage() {
+        return getMessage();
+    }
+
+    @Override
+    public int getTooltipAreaX() {
         return this.x;
     }
 
     @Override
-    public int yPos() {
+    public int getTooltipAreaY() {
         return this.y;
     }
 
     @Override
-    public int getWidth() {
+    public int getTooltipAreaWidth() {
         return 22;
     }
 
     @Override
-    public int getHeight() {
+    public int getTooltipAreaHeight() {
         return 22;
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return this.visible;
     }
 

src/main/java/appeng/client/gui/widgets/ToggleButton.java

@@ -74,7 +74,7 @@ public class ToggleButton extends Button implements ITooltip {
     }
 
     @Override
-    public String getMessage() {
+    public String getTooltipMessage() {
         if (this.displayName != null) {
             String name = I18n.format(this.displayName);
             String value = I18n.format(this.displayHint);
@@ -103,27 +103,27 @@ public class ToggleButton extends Button implements ITooltip {
     }
 
     @Override
-    public int xPos() {
+    public int getTooltipAreaX() {
         return this.x;
     }
 
     @Override
-    public int yPos() {
+    public int getTooltipAreaY() {
         return this.y;
     }
 
     @Override
-    public int getWidth() {
+    public int getTooltipAreaWidth() {
         return 16;
     }
 
     @Override
-    public int getHeight() {
+    public int getTooltipAreaHeight() {
         return 16;
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return this.visible;
     }
 }

src/main/java/appeng/container/implementations/FormationPlaneContainer.java

@@ -52,7 +52,7 @@ public class FormationPlaneContainer extends UpgradeableContainer {
         return helper.open(player, locator);
     }
 
-    @GuiSync(6)
+    @GuiSync(7)
     public YesNo placeMode;
 
     public FormationPlaneContainer(int id, final PlayerInventory ip, final FormationPlanePart te) {

src/main/java/appeng/core/AERecipeType.java

@@ -1,18 +0,0 @@
-package appeng.core;
-
-import net.minecraft.item.crafting.IRecipe;
-import net.minecraft.item.crafting.IRecipeType;
-import net.minecraft.util.ResourceLocation;
-
-public class AERecipeType<T extends IRecipe<?>> implements IRecipeType<T> {
-    private final String id;
-
-    public AERecipeType(ResourceLocation registryName) {
-        this.id = registryName.toString();
-    }
-
-    @Override
-    public String toString() {
-        return id;
-    }
-}

src/main/java/appeng/core/Registration.java

@@ -428,9 +428,6 @@ final class Registration {
     public void registerRecipeSerializers(RegistryEvent.Register<IRecipeSerializer<?>> event) {
         IForgeRegistry<IRecipeSerializer<?>> r = event.getRegistry();
 
-        GrinderRecipe.TYPE = new AERecipeType<>(GrinderRecipeSerializer.INSTANCE.getRegistryName());
-        InscriberRecipe.TYPE = new AERecipeType<>(InscriberRecipeSerializer.INSTANCE.getRegistryName());
-
         FacadeItem facadeItem = (FacadeItem) Api.INSTANCE.definitions().items().facade().item();
         r.registerAll(DisassembleRecipe.SERIALIZER, GrinderRecipeSerializer.INSTANCE,
                 InscriberRecipeSerializer.INSTANCE, FacadeRecipe.getSerializer(facadeItem));

src/main/java/appeng/facade/FacadePart.java

@@ -49,7 +49,7 @@ public class FacadePart implements IFacadePart {
 
     @Override
     public void getBoxes(final IPartCollisionHelper ch, boolean livingEntity) {
-        if (livingEntity) {
+        if (livingEntity || !ch.isBBCollision()) {
             // prevent weird snag behavior
             ch.addBox(0.0, 0.0, 14, 16.0, 16.0, 16.0);
         } else {

src/main/java/appeng/fluids/client/gui/widgets/FluidSlotWidget.java

@@ -52,7 +52,8 @@ public class FluidSlotWidget extends CustomSlotWidget {
             final float blue = (attributes.getColor() & 255) / 255.0F;
             RenderSystem.color3f(red, green, blue);
 
-            blit(xPos(), yPos(), this.getBlitOffset(), getWidth(), getHeight(), sprite);
+            blit(getTooltipAreaX(), getTooltipAreaY(), this.getBlitOffset(), getTooltipAreaWidth(),
+                    getTooltipAreaHeight(), sprite);
         }
     }
 
@@ -76,7 +77,7 @@ public class FluidSlotWidget extends CustomSlotWidget {
     }
 
     @Override
-    public String getMessage() {
+    public String getTooltipMessage() {
         final IAEFluidStack fluid = this.getFluidStack();
         if (fluid != null) {
             return I18n.format(fluid.getFluidStack().getTranslationKey());
@@ -85,7 +86,7 @@ public class FluidSlotWidget extends CustomSlotWidget {
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return true;
     }
 

src/main/java/appeng/fluids/client/gui/widgets/FluidTankWidget.java

@@ -85,7 +85,7 @@ public class FluidTankWidget extends Widget implements ITooltip {
     }
 
     @Override
-    public String getMessage() {
+    public String getTooltipMessage() {
         final IAEFluidStack fluid = this.tank.getFluidInSlot(this.slot);
         if (fluid != null && fluid.getStackSize() > 0) {
             String desc = fluid.getFluid().getAttributes().getDisplayName(fluid.getFluidStack()).getFormattedText();
@@ -97,27 +97,27 @@ public class FluidTankWidget extends Widget implements ITooltip {
     }
 
     @Override
-    public int xPos() {
+    public int getTooltipAreaX() {
         return this.x - 2;
     }
 
     @Override
-    public int yPos() {
+    public int getTooltipAreaY() {
         return this.y - 2;
     }
 
     @Override
-    public int getWidth() {
+    public int getTooltipAreaWidth() {
         return this.width + 4;
     }
 
     @Override
-    public int getHeight() {
+    public int getTooltipAreaHeight() {
         return this.height + 4;
     }
 
     @Override
-    public boolean isVisible() {
+    public boolean isTooltipAreaVisible() {
         return true;
     }
 

src/main/java/appeng/fluids/client/gui/widgets/OptionalFluidSlotWidget.java

@@ -48,7 +48,8 @@ public class OptionalFluidSlotWidget extends FluidSlotWidget {
         } else {
             RenderSystem.color4f(1.0F, 1.0F, 1.0F, 0.4F);
         }
-        GuiUtils.drawTexturedModalRect(guileft + this.xPos() - 1, guitop + this.yPos() - 1, this.srcX - 1,
-                this.srcY - 1, this.getWidth() + 2, this.getHeight() + 2, currentZIndex);
+        GuiUtils.drawTexturedModalRect(guileft + this.getTooltipAreaX() - 1, guitop + this.getTooltipAreaY() - 1,
+                this.srcX - 1, this.srcY - 1, this.getTooltipAreaWidth() + 2, this.getTooltipAreaHeight() + 2,
+                currentZIndex);
     }
 }

src/main/java/appeng/fluids/helper/DualityFluidInterface.java

@@ -210,7 +210,7 @@ public class DualityFluidInterface
         } else if (capabilityClass == Capabilities.STORAGE_MONITORABLE_ACCESSOR) {
             return (LazyOptional<T>) LazyOptional.of(() -> this.accessor);
         }
-        return null;
+        return LazyOptional.empty();
     }
 
     private boolean hasConfig() {

src/main/java/appeng/fluids/parts/FluidAnnihilationPlanePart.java

@@ -14,7 +14,6 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.tags.FluidTags;
 import net.minecraft.tags.Tag;
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.Direction;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.IBlockReader;
@@ -35,15 +34,12 @@ import appeng.api.networking.storage.IStorageGrid;
 import appeng.api.networking.ticking.IGridTickable;
 import appeng.api.networking.ticking.TickRateModulation;
 import appeng.api.networking.ticking.TickingRequest;
-import appeng.api.parts.IPart;
 import appeng.api.parts.IPartCollisionHelper;
-import appeng.api.parts.IPartHost;
 import appeng.api.parts.IPartModel;
 import appeng.api.storage.IMEInventory;
 import appeng.api.storage.channels.IFluidStorageChannel;
 import appeng.api.storage.data.IAEFluidStack;
 import appeng.api.util.AECableType;
-import appeng.api.util.AEPartLocation;
 import appeng.core.Api;
 import appeng.core.AppEng;
 import appeng.core.settings.TickRates;
@@ -53,6 +49,7 @@ import appeng.items.parts.PartModels;
 import appeng.me.GridAccessException;
 import appeng.me.helpers.MachineSource;
 import appeng.parts.BasicStatePart;
+import appeng.parts.automation.PlaneConnectionHelper;
 import appeng.parts.automation.PlaneConnections;
 import appeng.parts.automation.PlaneModelData;
 import appeng.parts.automation.PlaneModels;
@@ -73,115 +70,27 @@ public class FluidAnnihilationPlanePart extends BasicStatePart implements IGridT
 
     private final IActionSource mySrc = new MachineSource(this);
 
+    private final PlaneConnectionHelper connectionHelper = new PlaneConnectionHelper(this);
+
     public FluidAnnihilationPlanePart(final ItemStack is) {
         super(is);
     }
 
     @Override
     public void getBoxes(final IPartCollisionHelper bch) {
-        int minX = 1;
-        int minY = 1;
-        int maxX = 15;
-        int maxY = 15;
-
-        final IPartHost host = this.getHost();
-        if (host != null) {
-            final TileEntity te = host.getTile();
-
-            final BlockPos pos = te.getPos();
-
-            final Direction e = bch.getWorldX();
-            final Direction u = bch.getWorldY();
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(e.getOpposite())), this.getSide())) {
-                minX = 0;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(e)), this.getSide())) {
-                maxX = 16;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(u.getOpposite())), this.getSide())) {
-                minY = 0;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(e)), this.getSide())) {
-                maxY = 16;
-            }
-        }
-
-        bch.addBox(5, 5, 14, 11, 11, 15);
-        bch.addBox(minX, minY, 15, maxX, maxY, 16);
+        connectionHelper.getBoxes(bch);
     }
 
     public PlaneConnections getConnections() {
-
-        final Direction facingRight, facingUp;
-        AEPartLocation location = this.getSide();
-        switch (location) {
-            case UP:
-                facingRight = Direction.EAST;
-                facingUp = Direction.NORTH;
-                break;
-            case DOWN:
-                facingRight = Direction.WEST;
-                facingUp = Direction.NORTH;
-                break;
-            case NORTH:
-                facingRight = Direction.WEST;
-                facingUp = Direction.UP;
-                break;
-            case SOUTH:
-                facingRight = Direction.EAST;
-                facingUp = Direction.UP;
-                break;
-            case WEST:
-                facingRight = Direction.SOUTH;
-                facingUp = Direction.UP;
-                break;
-            case EAST:
-                facingRight = Direction.NORTH;
-                facingUp = Direction.UP;
-                break;
-            default:
-            case INTERNAL:
-                return PlaneConnections.of(false, false, false, false);
-        }
-
-        boolean left = false, right = false, down = false, up = false;
-
-        final IPartHost host = this.getHost();
-        if (host != null) {
-            final TileEntity te = host.getTile();
-
-            final BlockPos pos = te.getPos();
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingRight.getOpposite())),
-                    this.getSide())) {
-                left = true;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingRight)), this.getSide())) {
-                right = true;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingUp.getOpposite())),
-                    this.getSide())) {
-                down = true;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingUp)), this.getSide())) {
-                up = true;
-            }
-        }
-
-        return PlaneConnections.of(up, right, down, left);
+        return connectionHelper.getConnections();
     }
 
     @Override
     public void onNeighborChanged(IBlockReader w, BlockPos pos, BlockPos neighbor) {
         if (pos.offset(this.getSide().getFacing()).equals(neighbor)) {
             this.refresh();
+        } else {
+            connectionHelper.updateConnections();
         }
     }
 
@@ -190,14 +99,6 @@ public class FluidAnnihilationPlanePart extends BasicStatePart implements IGridT
         return 1;
     }
 
-    private boolean isAnnihilationPlane(final TileEntity blockTileEntity, final AEPartLocation side) {
-        if (blockTileEntity instanceof IPartHost) {
-            final IPart p = ((IPartHost) blockTileEntity).getPart(side);
-            return p != null && p.getClass() == this.getClass();
-        }
-        return false;
-    }
-
     private void refresh() {
         try {
             this.getProxy().getTick().alertDevice(this.getProxy().getNode());

src/main/java/appeng/parts/automation/AbstractFormationPlanePart.java

@@ -4,16 +4,13 @@ package appeng.parts.automation;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.Direction;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.IBlockReader;
 
 import appeng.api.config.Actionable;
 import appeng.api.config.Settings;
 import appeng.api.networking.security.IActionSource;
-import appeng.api.parts.IPart;
 import appeng.api.parts.IPartCollisionHelper;
-import appeng.api.parts.IPartHost;
 import appeng.api.storage.IMEInventory;
 import appeng.api.storage.cells.ICellContainer;
 import appeng.api.storage.cells.ICellInventory;
@@ -30,6 +27,7 @@ public abstract class AbstractFormationPlanePart<T extends IAEStack<T>> extends
     private boolean wasActive = false;
     private int priority = 0;
     protected boolean blocked = false;
+    private final PlaneConnectionHelper connectionHelper = new PlaneConnectionHelper(this);
 
     public AbstractFormationPlanePart(ItemStack is) {
         super(is);
@@ -64,103 +62,11 @@ public abstract class AbstractFormationPlanePart<T extends IAEStack<T>> extends
 
     @Override
     public void getBoxes(final IPartCollisionHelper bch) {
-        int minX = 1;
-        int minY = 1;
-        int maxX = 15;
-        int maxY = 15;
-
-        final IPartHost host = this.getHost();
-        if (host != null) {
-            final TileEntity te = host.getTile();
-
-            final BlockPos pos = te.getPos();
-
-            final Direction e = bch.getWorldX();
-            final Direction u = bch.getWorldY();
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(e.getOpposite())), this.getSide())) {
-                minX = 0;
-            }
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(e)), this.getSide())) {
-                maxX = 16;
-            }
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(u.getOpposite())), this.getSide())) {
-                minY = 0;
-            }
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(u)), this.getSide())) {
-                maxY = 16;
-            }
-        }
-
-        bch.addBox(5, 5, 14, 11, 11, 15);
-        bch.addBox(minX, minY, 15, maxX, maxY, 16);
+        connectionHelper.getBoxes(bch);
     }
 
     public PlaneConnections getConnections() {
-
-        final Direction facingRight, facingUp;
-        AEPartLocation location = this.getSide();
-        switch (location) {
-            case UP:
-                facingRight = Direction.EAST;
-                facingUp = Direction.NORTH;
-                break;
-            case DOWN:
-                facingRight = Direction.WEST;
-                facingUp = Direction.NORTH;
-                break;
-            case NORTH:
-                facingRight = Direction.WEST;
-                facingUp = Direction.UP;
-                break;
-            case SOUTH:
-                facingRight = Direction.EAST;
-                facingUp = Direction.UP;
-                break;
-            case WEST:
-                facingRight = Direction.SOUTH;
-                facingUp = Direction.UP;
-                break;
-            case EAST:
-                facingRight = Direction.NORTH;
-                facingUp = Direction.UP;
-                break;
-            default:
-            case INTERNAL:
-                return PlaneConnections.of(false, false, false, false);
-        }
-
-        boolean left = false, right = false, down = false, up = false;
-
-        final IPartHost host = this.getHost();
-        if (host != null) {
-            final TileEntity te = host.getTile();
-
-            final BlockPos pos = te.getPos();
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(facingRight.getOpposite())),
-                    this.getSide())) {
-                left = true;
-            }
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(facingRight)), this.getSide())) {
-                right = true;
-            }
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(facingUp.getOpposite())),
-                    this.getSide())) {
-                down = true;
-            }
-
-            if (this.isTransitionPlane(te.getWorld().getTileEntity(pos.offset(facingUp)), this.getSide())) {
-                up = true;
-            }
-        }
-
-        return PlaneConnections.of(up, right, down, left);
+        return connectionHelper.getConnections();
     }
 
     @Override
@@ -172,6 +78,8 @@ public abstract class AbstractFormationPlanePart<T extends IAEStack<T>> extends
             final BlockPos tePos = te.getPos().offset(side.getFacing());
 
             this.blocked = !w.getBlockState(tePos).getMaterial().isReplaceable();
+        } else {
+            connectionHelper.updateConnections();
         }
     }
 
@@ -180,14 +88,6 @@ public abstract class AbstractFormationPlanePart<T extends IAEStack<T>> extends
         return 1;
     }
 
-    protected boolean isTransitionPlane(final TileEntity blockTileEntity, final AEPartLocation side) {
-        if (blockTileEntity instanceof IPartHost) {
-            final IPart p = ((IPartHost) blockTileEntity).getPart(side);
-            return p != null && this.getClass() == p.getClass();
-        }
-        return false;
-    }
-
     @Override
     public T extractItems(final T request, final Actionable mode, final IActionSource src) {
         return null;

src/main/java/appeng/parts/automation/AnnihilationPlanePart.java

@@ -35,7 +35,6 @@ import net.minecraft.tags.BlockTags;
 import net.minecraft.tags.ItemTags;
 import net.minecraft.tags.Tag;
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.Direction;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.util.math.AxisAlignedBB;
 import net.minecraft.util.math.BlockPos;
@@ -58,9 +57,7 @@ import appeng.api.networking.storage.IStorageGrid;
 import appeng.api.networking.ticking.IGridTickable;
 import appeng.api.networking.ticking.TickRateModulation;
 import appeng.api.networking.ticking.TickingRequest;
-import appeng.api.parts.IPart;
 import appeng.api.parts.IPartCollisionHelper;
-import appeng.api.parts.IPartHost;
 import appeng.api.parts.IPartModel;
 import appeng.api.storage.channels.IItemStorageChannel;
 import appeng.api.storage.data.IAEItemStack;
@@ -96,53 +93,31 @@ public class AnnihilationPlanePart extends BasicStatePart implements IGridTickab
     private boolean isAccepting = true;
     private boolean breaking = false;
 
+    private final PlaneConnectionHelper connectionHelper = new PlaneConnectionHelper(this);
+
     public AnnihilationPlanePart(final ItemStack is) {
         super(is);
     }
 
     @Override
-    public TickRateModulation call(final World world) throws Exception {
+    public TickRateModulation call(final World world) {
         this.breaking = false;
         return this.breakBlock(true);
     }
 
     @Override
     public void getBoxes(final IPartCollisionHelper bch) {
-        int minX = 1;
-        int minY = 1;
-        int maxX = 15;
-        int maxY = 15;
 
-        final IPartHost host = this.getHost();
-        if (host != null) {
-            final TileEntity te = host.getTile();
-
-            final BlockPos pos = te.getPos();
-
-            final Direction e = bch.getWorldX();
-            final Direction u = bch.getWorldY();
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(e.getOpposite())), this.getSide())) {
-                minX = 0;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(e)), this.getSide())) {
-                maxX = 16;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(u.getOpposite())), this.getSide())) {
-                minY = 0;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(e)), this.getSide())) {
-                maxY = 16;
-            }
+        // For collision, we're using a simplified bounding box
+        if (bch.isBBCollision()) {
+            // The smaller collision hitbox here is needed to allow for the entity collision
+            // event
+            bch.addBox(0, 0, 14, 16, 16, 15.5);
+            return;
         }
 
-        bch.addBox(5, 5, 14, 11, 11, 15);
-        // The smaller collision hitbox here is needed to allow for the entity collision
-        // event
-        bch.addBox(minX, minY, 15, maxX, maxY, bch.isBBCollision() ? 15 : 16);
+        connectionHelper.getBoxes(bch);
+
     }
 
     /**
@@ -150,73 +125,15 @@ public class AnnihilationPlanePart extends BasicStatePart implements IGridTickab
      *         visually.
      */
     public PlaneConnections getConnections() {
-
-        final Direction facingRight, facingUp;
-        AEPartLocation location = this.getSide();
-        switch (location) {
-            case UP:
-                facingRight = Direction.EAST;
-                facingUp = Direction.NORTH;
-                break;
-            case DOWN:
-                facingRight = Direction.WEST;
-                facingUp = Direction.NORTH;
-                break;
-            case NORTH:
-                facingRight = Direction.WEST;
-                facingUp = Direction.UP;
-                break;
-            case SOUTH:
-                facingRight = Direction.EAST;
-                facingUp = Direction.UP;
-                break;
-            case WEST:
-                facingRight = Direction.SOUTH;
-                facingUp = Direction.UP;
-                break;
-            case EAST:
-                facingRight = Direction.NORTH;
-                facingUp = Direction.UP;
-                break;
-            default:
-            case INTERNAL:
-                return PlaneConnections.of(false, false, false, false);
-        }
-
-        boolean left = false, right = false, down = false, up = false;
-
-        final IPartHost host = this.getHost();
-        if (host != null) {
-            final TileEntity te = host.getTile();
-
-            final BlockPos pos = te.getPos();
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingRight.getOpposite())),
-                    this.getSide())) {
-                left = true;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingRight)), this.getSide())) {
-                right = true;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingUp.getOpposite())),
-                    this.getSide())) {
-                down = true;
-            }
-
-            if (this.isAnnihilationPlane(te.getWorld().getTileEntity(pos.offset(facingUp)), this.getSide())) {
-                up = true;
-            }
-        }
-
-        return PlaneConnections.of(up, right, down, left);
+        return connectionHelper.getConnections();
     }
 
     @Override
     public void onNeighborChanged(IBlockReader w, BlockPos pos, BlockPos neighbor) {
         if (pos.offset(this.getSide().getFacing()).equals(neighbor)) {
             this.refresh();
+        } else {
+            connectionHelper.updateConnections();
         }
     }
 
@@ -362,14 +279,6 @@ public class AnnihilationPlanePart extends BasicStatePart implements IGridTickab
         return changed;
     }
 
-    protected boolean isAnnihilationPlane(final TileEntity blockTileEntity, final AEPartLocation side) {
-        if (blockTileEntity instanceof IPartHost) {
-            final IPart p = ((IPartHost) blockTileEntity).getPart(side);
-            return p != null && p.getClass() == this.getClass();
-        }
-        return false;
-    }
-
     @Override
     @MENetworkEventSubscribe
     public void chanRender(final MENetworkChannelsChanged c) {

src/main/java/appeng/parts/automation/FormationPlanePart.java

@@ -21,26 +21,23 @@ package appeng.parts.automation;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.Random;
 
 import javax.annotation.Nonnull;
-import javax.annotation.Nullable;
 
 import net.minecraft.entity.Entity;
+import net.minecraft.entity.EntityType;
 import net.minecraft.entity.item.ItemEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.inventory.container.ContainerType;
-import net.minecraft.item.BlockItem;
+import net.minecraft.item.BlockItemUseContext;
 import net.minecraft.item.DirectionalPlaceContext;
-import net.minecraft.item.FireworkRocketItem;
-import net.minecraft.item.FireworkStarItem;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.item.ItemUseContext;
-import net.minecraft.item.WallOrFloorItem;
 import net.minecraft.nbt.CompoundNBT;
 import net.minecraft.tileentity.TileEntity;
-import net.minecraft.util.ActionResultType;
 import net.minecraft.util.Direction;
+import net.minecraft.util.Direction.Axis;
 import net.minecraft.util.Hand;
 import net.minecraft.util.math.AxisAlignedBB;
 import net.minecraft.util.math.BlockPos;
@@ -49,7 +46,6 @@ import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.World;
 import net.minecraft.world.server.ServerWorld;
 import net.minecraftforge.client.model.data.IModelData;
-import net.minecraftforge.common.IPlantable;
 import net.minecraftforge.items.IItemHandler;
 
 import appeng.api.config.AccessRestriction;
@@ -64,7 +60,6 @@ import appeng.api.networking.events.MENetworkChannelsChanged;
 import appeng.api.networking.events.MENetworkEventSubscribe;
 import appeng.api.networking.events.MENetworkPowerStatusChange;
 import appeng.api.networking.security.IActionSource;
-import appeng.api.parts.IPartItem;
 import appeng.api.parts.IPartModel;
 import appeng.api.storage.IMEInventoryHandler;
 import appeng.api.storage.IStorageChannel;
@@ -89,6 +84,7 @@ import appeng.util.prioritylist.PrecisePriorityList;
 public class FormationPlanePart extends AbstractFormationPlanePart<IAEItemStack> {
 
     private static final PlaneModels MODELS = new PlaneModels("part/formation_plane", "part/formation_plane_on");
+    private static final Random RANDOM_OFFSET = new Random();
 
     @PartModels
     public static List<IPartModel> getModels() {
@@ -222,12 +218,12 @@ public class FormationPlanePart extends AbstractFormationPlanePart<IAEItemStack>
         final BlockPos placePos = te.getPos().offset(side.getFacing());
 
         if (w.getBlockState(placePos).getMaterial().isReplaceable()) {
-            if (placeBlock == YesNo.YES && (i instanceof BlockItem || i instanceof IPlantable
-                    || i instanceof FireworkStarItem || i instanceof FireworkRocketItem || i instanceof IPartItem)) {
+            if (placeBlock == YesNo.YES) {
                 final PlayerEntity player = Platform.getPlayer((ServerWorld) w);
                 Platform.configurePlayer(player, side, this.getTile());
-                Hand hand = player.getActiveHand();
-                player.setHeldItem(hand, is);
+                // Seems to work without...
+                // Hand hand = player.getActiveHand();
+                // player.setHeldItem(hand, is);
 
                 maxStorage = is.getCount();
                 worked = true;
@@ -235,84 +231,33 @@ public class FormationPlanePart extends AbstractFormationPlanePart<IAEItemStack>
                     // The side the plane is attached to will be considered the look direction
                     // in terms of placing an item
                     Direction lookDirection = side.getFacing();
+                    PlaneDirectionalPlaceContext context = new PlaneDirectionalPlaceContext(w, player, placePos,
+                            lookDirection, is, lookDirection.getOpposite());
 
-                    // FIXME No idea what any of this is _supposed_ to do, comment badly needed
-                    if (i instanceof IPlantable || i instanceof WallOrFloorItem) {
-                        boolean Worked = false;
+                    i.onItemUse(context);
+                    maxStorage -= is.getCount();
 
-                        // Up or Down, Attempt 1??
-                        if (side.xOffset == 0 && side.zOffset == 0) {
-                            Worked = i.onItemUse(new DirectionalPlaceContext(w, placePos.offset(side.getFacing()),
-                                    lookDirection, is, side.getFacing())) == ActionResultType.SUCCESS;
-                        }
-
-                        // Up or Down, Attempt 2??
-                        if (!Worked && side.xOffset == 0 && side.zOffset == 0) {
-                            Worked = i.onItemUse(new DirectionalPlaceContext(w,
-                                    placePos.offset(side.getFacing().getOpposite()), lookDirection, is,
-                                    side.getFacing().getOpposite())) == ActionResultType.SUCCESS;
-                        }
-
-                        // Horizontal, attempt 1??
-                        if (!Worked && side.yOffset == 0) {
-                            Worked = i.onItemUse(new DirectionalPlaceContext(w, placePos.offset(Direction.DOWN),
-                                    lookDirection, is, Direction.DOWN)) == ActionResultType.SUCCESS;
-                        }
-
-                        if (!Worked) {
-                            i.onItemUse(new DirectionalPlaceContext(w, placePos, lookDirection, is,
-                                    lookDirection.getOpposite()));
-                        }
-
-                        maxStorage -= is.getCount();
-                    } else {
-                        i.onItemUse(new DirectionalPlaceContext(w, placePos, lookDirection, is,
-                                lookDirection.getOpposite()));
-                        maxStorage -= is.getCount();
-                    }
                 } else {
                     maxStorage = 1;
                 }
 
-                // Safe keeping
-                player.setHeldItem(hand, ItemStack.EMPTY);
+                // Seems to work without... Safe keeping
+                // player.setHeldItem(hand, ItemStack.EMPTY);
             } else {
-                worked = true;
-
                 final int sum = this.countEntitesAround(w, placePos);
 
+                // Disable spawning once there is a certain amount of entities in an area.
                 if (sum < AEConfig.instance().getFormationPlaneEntityLimit()) {
+                    worked = true;
+
                     if (type == Actionable.MODULATE) {
                         is.setCount((int) maxStorage);
-                        final double x = (side.xOffset != 0 ? 0 : .7 * (Platform.getRandomFloat() - .5)) + side.xOffset
-                                + .5 + te.getPos().getX();
-                        final double y = (side.yOffset != 0 ? 0 : .7 * (Platform.getRandomFloat() - .5)) + side.yOffset
-                                + .5 + te.getPos().getY();
-                        final double z = (side.zOffset != 0 ? 0 : .7 * (Platform.getRandomFloat() - .5)) + side.zOffset
-                                + .5 + te.getPos().getZ();
-
-                        final ItemEntity ei = new ItemEntity(w, x, y, z, is.copy());
-
-                        Entity result = ei;
-
-                        ei.setMotion(side.xOffset * 0.2, side.yOffset * 0.2, side.zOffset * 0.2);
-
-                        if (is.getItem().hasCustomEntity(is)) {
-                            result = is.getItem().createEntity(w, ei, is);
-                            if (result != null) {
-                                ei.remove();
-                            } else {
-                                result = ei;
-                            }
-                        }
-
-                        if (!w.addEntity(result)) {
-                            result.remove();
+                        if (!spawnItemEntity(w, te, side, is)) {
+                            // revert in case something prevents spawning.
                             worked = false;
                         }
+
                     }
-                } else {
-                    worked = false;
                 }
             }
         }
@@ -331,6 +276,57 @@ public class FormationPlanePart extends AbstractFormationPlanePart<IAEItemStack>
         return input;
     }
 
+    private static boolean spawnItemEntity(World w, TileEntity te, AEPartLocation side, ItemStack is) {
+        // the item offset based on the entity height plus some offset
+        final double itemOffset = .55 + EntityType.ITEM.getHeight();
+
+        // The center of the block the plane is located in
+        final double centerX = te.getPos().getX() + .5;
+        final double centerY = te.getPos().getY() + .5;
+        final double centerZ = te.getPos().getZ() + .5;
+
+        // When spawning downwards, we have to take the item height of 0.25 into account
+        // Otherwise it will get stuck and be spit out in a random direction as
+        // minecraft spawns it at its feet position and not center
+        final double additionalYOffset = side.yOffset == -1 ? -.3 : 0;
+
+        // Calculate the offsets to spawn it into the adjacent block, taking the sign
+        // into account.
+        // Spawn it 0.8 blocks away from the center pos when facing in this direction
+        // Every other direction will select a position in a .5 block area around the
+        // block center.
+        final double offsetX = (side.xOffset == 0) ? ((RANDOM_OFFSET.nextFloat() / 2) - .25)
+                : (side.xOffset * itemOffset);
+        final double offsetY = (side.yOffset == 0) ? ((RANDOM_OFFSET.nextFloat() / 2) - .25)
+                : ((side.yOffset * itemOffset) + additionalYOffset);
+        final double offsetZ = (side.zOffset == 0) ? ((RANDOM_OFFSET.nextFloat() / 2) - .25)
+                : (side.zOffset * itemOffset);
+
+        final double absoluteX = centerX + offsetX;
+        final double absoluteY = centerY + offsetY;
+        final double absoluteZ = centerZ + offsetZ;
+
+        final ItemEntity ei = new ItemEntity(w, absoluteX, absoluteY, absoluteZ, is.copy());
+        Entity result = ei;
+
+        ei.setMotion(side.xOffset * .1, side.yOffset * 0.1, side.zOffset * 0.1);
+
+        if (is.getItem().hasCustomEntity(is)) {
+            result = is.getItem().createEntity(w, ei, is);
+            if (result != null) {
+                ei.remove();
+            } else {
+                result = ei;
+            }
+        }
+
+        if (!w.addEntity(result)) {
+            result.remove();
+            return false;
+        }
+        return true;
+    }
+
     @Override
     public IStorageChannel<IAEItemStack> getChannel() {
         return Api.instance().storage().getStorageChannel(IItemStorageChannel.class);
@@ -364,11 +360,69 @@ public class FormationPlanePart extends AbstractFormationPlanePart<IAEItemStack>
         return list.size();
     }
 
-    private class ForcedItemUseContext extends ItemUseContext {
-        protected ForcedItemUseContext(World worldIn, @Nullable PlayerEntity player, Hand handIn, ItemStack heldItem,
-                BlockRayTraceResult rayTraceResultIn) {
-            super(worldIn, player, handIn, heldItem, rayTraceResultIn);
+    /**
+     * A custom {@link DirectionalPlaceContext} which also accepts a player needed
+     * various blocks like seeds.
+     * <p>
+     * Also removed {@link DirectionalPlaceContext#replacingClickedOnBlock} as this
+     * can cause a {@link StackOverflowError} for certain replaceable blocks.
+     */
+    private static class PlaneDirectionalPlaceContext extends BlockItemUseContext {
+        private final Direction lookDirection;
+
+        public PlaneDirectionalPlaceContext(World world, PlayerEntity player, BlockPos pos, Direction lookDirection,
+                ItemStack itemStack, Direction facing) {
+            super(world, player, Hand.MAIN_HAND, itemStack, new BlockRayTraceResult(
+                    new Vec3d(pos.getX() + 0.5D, pos.getY(), pos.getZ() + 0.5D), facing, pos, false));
+            this.lookDirection = lookDirection;
+        }
+
+        public BlockPos getPos() {
+            return this.rayTraceResult.getPos();
+        }
+
+        public boolean canPlace() {
+            return this.world.getBlockState(this.rayTraceResult.getPos()).isReplaceable(this);
+        }
+
+        public Direction getNearestLookingDirection() {
+            return Direction.DOWN;
+        }
+
+        public Direction[] getNearestLookingDirections() {
+            switch (this.lookDirection) {
+                case DOWN:
+                default:
+                    return new Direction[] { Direction.DOWN, Direction.NORTH, Direction.EAST, Direction.SOUTH,
+                            Direction.WEST, Direction.UP };
+                case UP:
+                    return new Direction[] { Direction.DOWN, Direction.UP, Direction.NORTH, Direction.EAST,
+                            Direction.SOUTH, Direction.WEST };
+                case NORTH:
+                    return new Direction[] { Direction.DOWN, Direction.NORTH, Direction.EAST, Direction.WEST,
+                            Direction.UP, Direction.SOUTH };
+                case SOUTH:
+                    return new Direction[] { Direction.DOWN, Direction.SOUTH, Direction.EAST, Direction.WEST,
+                            Direction.UP, Direction.NORTH };
+                case WEST:
+                    return new Direction[] { Direction.DOWN, Direction.WEST, Direction.SOUTH, Direction.UP,
+                            Direction.NORTH, Direction.EAST };
+                case EAST:
+                    return new Direction[] { Direction.DOWN, Direction.EAST, Direction.SOUTH, Direction.UP,
+                            Direction.NORTH, Direction.WEST };
+            }
+        }
+
+        public Direction getPlacementHorizontalFacing() {
+            return this.lookDirection.getAxis() == Axis.Y ? Direction.NORTH : this.lookDirection;
+        }
+
+        public boolean func_225518_g_() {
+            return false;
+        }
+
+        public float getPlacementYaw() {
+            return (float) (this.lookDirection.getHorizontalIndex() * 90);
         }
     }
-
 }

src/main/java/appeng/parts/automation/IdentityAnnihilationPlanePart.java

@@ -55,15 +55,6 @@ public class IdentityAnnihilationPlanePart extends AnnihilationPlanePart {
         super(is);
     }
 
-    @Override
-    protected boolean isAnnihilationPlane(final TileEntity blockTileEntity, final AEPartLocation side) {
-        if (blockTileEntity instanceof IPartHost) {
-            final IPart p = ((IPartHost) blockTileEntity).getPart(side);
-            return p != null && p.getClass() == this.getClass();
-        }
-        return false;
-    }
-
     @Override
     protected float calculateEnergyUsage(final ServerWorld w, final BlockPos pos, final List<ItemStack> items) {
         final float requiredEnergy = super.calculateEnergyUsage(w, pos, items);

src/main/java/appeng/parts/automation/PlaneConnectionHelper.java

@@ -0,0 +1,160 @@
+package appeng.parts.automation;
+
+import javax.annotation.Nullable;
+
+import net.minecraft.tileentity.TileEntity;
+import net.minecraft.util.Direction;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+
+import appeng.api.parts.IPart;
+import appeng.api.parts.IPartCollisionHelper;
+import appeng.api.parts.IPartHost;
+import appeng.api.util.AEPartLocation;
+import appeng.parts.AEBasePart;
+
+/**
+ * Helps plane parts (annihilation, formation) with determining and checking for
+ * connections to adjacent plane parts of the same type to form a visually
+ * larger plane.
+ */
+public final class PlaneConnectionHelper {
+
+    private final AEBasePart part;
+
+    public PlaneConnectionHelper(AEBasePart part) {
+        this.part = part;
+    }
+
+    /**
+     * Gets on which sides this part has adjacent planes that it visually connects
+     * to
+     */
+    public PlaneConnections getConnections() {
+        TileEntity hostTileEntity = getHostTileEntity();
+        AEPartLocation side = part.getSide();
+
+        final Direction facingRight, facingUp;
+        switch (side) {
+            case UP:
+                facingRight = Direction.EAST;
+                facingUp = Direction.NORTH;
+                break;
+            case DOWN:
+                facingRight = Direction.WEST;
+                facingUp = Direction.NORTH;
+                break;
+            case NORTH:
+                facingRight = Direction.WEST;
+                facingUp = Direction.UP;
+                break;
+            case SOUTH:
+                facingRight = Direction.EAST;
+                facingUp = Direction.UP;
+                break;
+            case WEST:
+                facingRight = Direction.SOUTH;
+                facingUp = Direction.UP;
+                break;
+            case EAST:
+                facingRight = Direction.NORTH;
+                facingUp = Direction.UP;
+                break;
+            default:
+            case INTERNAL:
+                return PlaneConnections.of(false, false, false, false);
+        }
+
+        boolean left = false, right = false, down = false, up = false;
+
+        if (hostTileEntity != null) {
+            World world = hostTileEntity.getWorld();
+            BlockPos pos = hostTileEntity.getPos();
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(facingRight.getOpposite())))) {
+                left = true;
+            }
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(facingRight)))) {
+                right = true;
+            }
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(facingUp.getOpposite())))) {
+                down = true;
+            }
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(facingUp)))) {
+                up = true;
+            }
+        }
+
+        return PlaneConnections.of(up, right, down, left);
+    }
+
+    /**
+     * Get the bounding boxes of this plane parts components.
+     */
+    public void getBoxes(IPartCollisionHelper bch) {
+        int minX = 1;
+        int minY = 1;
+        int maxX = 15;
+        int maxY = 15;
+
+        TileEntity hostTile = getHostTileEntity();
+        if (hostTile != null) {
+            World world = hostTile.getWorld();
+
+            final BlockPos pos = hostTile.getPos();
+
+            final Direction e = bch.getWorldX();
+            final Direction u = bch.getWorldY();
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(e.getOpposite())))) {
+                minX = 0;
+            }
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(e)))) {
+                maxX = 16;
+            }
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(u.getOpposite())))) {
+                minY = 0;
+            }
+
+            if (isCompatiblePlaneAdjacent(world.getTileEntity(pos.offset(u)))) {
+                maxY = 16;
+            }
+        }
+
+        bch.addBox(5, 5, 14, 11, 11, 15);
+        bch.addBox(minX, minY, 15, maxX, maxY, 16);
+    }
+
+    /**
+     * Call this when an adjacent block has changed since the connections need to be
+     * recalculated.
+     */
+    public void updateConnections() {
+        TileEntity hostTile = getHostTileEntity();
+        if (hostTile != null) {
+            hostTile.requestModelDataUpdate();
+        }
+    }
+
+    private boolean isCompatiblePlaneAdjacent(@Nullable TileEntity adjacentTileEntity) {
+        if (adjacentTileEntity instanceof IPartHost) {
+            final IPart p = ((IPartHost) adjacentTileEntity).getPart(part.getSide());
+            return p != null && p.getClass() == part.getClass();
+        }
+        return false;
+    }
+
+    private TileEntity getHostTileEntity() {
+        IPartHost host = part.getHost();
+        if (host != null) {
+            return host.getTile();
+        }
+        return null;
+    }
+
+}

src/main/java/appeng/parts/p2p/FluidP2PTunnelPart.java

@@ -18,15 +18,10 @@
 
 package appeng.parts.p2p;
 
-import java.util.ArrayDeque;
-import java.util.ArrayList;
-import java.util.Deque;
-import java.util.Iterator;
 import java.util.List;
 
 import javax.annotation.Nonnull;
 
-import net.minecraft.fluid.Fluid;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.math.BlockPos;
@@ -37,18 +32,18 @@ import net.minecraftforge.fluids.FluidStack;
 import net.minecraftforge.fluids.capability.CapabilityFluidHandler;
 import net.minecraftforge.fluids.capability.IFluidHandler;
 
+import appeng.api.config.PowerUnits;
 import appeng.api.parts.IPartModel;
 import appeng.items.parts.PartModels;
 import appeng.me.GridAccessException;
 
-public class FluidP2PTunnelPart extends P2PTunnelPart<FluidP2PTunnelPart> implements IFluidHandler {
+public class FluidP2PTunnelPart extends P2PTunnelPart<FluidP2PTunnelPart> {
 
     private static final P2PModels MODELS = new P2PModels("part/p2p/p2p_tunnel_fluids");
+    private static final IFluidHandler NULL_FLUID_HANDLER = new NullFluidHandler();
 
-    private static final ThreadLocal<Deque<FluidP2PTunnelPart>> DEPTH = new ThreadLocal<>();;
-
-    private LazyOptional<IFluidHandler> cachedTank;
-    private int tmpUsed;
+    private final IFluidHandler inputHandler = new InputFluidHandler();
+    private final IFluidHandler outputHandler = new OutputFluidHandler();
 
     public FluidP2PTunnelPart(final ItemStack is) {
         super(is);
@@ -65,13 +60,10 @@ public class FluidP2PTunnelPart extends P2PTunnelPart<FluidP2PTunnelPart> implem
 
     @Override
     public void onTunnelNetworkChange() {
-        this.cachedTank = null;
     }
 
     @Override
     public void onNeighborChanged(IBlockReader w, BlockPos pos, BlockPos neighbor) {
-        this.cachedTank = null;
-
         if (this.isOutput()) {
             final FluidP2PTunnelPart in = this.getInput();
             if (in != null) {
@@ -84,7 +76,10 @@ public class FluidP2PTunnelPart extends P2PTunnelPart<FluidP2PTunnelPart> implem
     @Override
     public <T> LazyOptional<T> getCapability(Capability<T> capabilityClass) {
         if (capabilityClass == CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY) {
-            return (LazyOptional<T>) LazyOptional.of(() -> this);
+            if (this.isOutput()) {
+                return (LazyOptional<T>) LazyOptional.of(() -> this.outputHandler);
+            }
+            return (LazyOptional<T>) LazyOptional.of(() -> this.inputHandler);
         }
 
         return super.getCapability(capabilityClass);
@@ -95,168 +90,173 @@ public class FluidP2PTunnelPart extends P2PTunnelPart<FluidP2PTunnelPart> implem
         return MODELS.getModel(this.isPowered(), this.isActive());
     }
 
-    @Override
-    public int getTanks() {
-        return 0;
-    }
+    private IFluidHandler getAttachedFluidHandler() {
+        LazyOptional<IFluidHandler> fluidHandler = LazyOptional.empty();
+        if (this.isActive()) {
+            final TileEntity self = this.getTile();
+            final TileEntity te = self.getWorld().getTileEntity(self.getPos().offset(this.getSide().getFacing()));
 
-    @Override
-    @Nonnull
-    public FluidStack getFluidInTank(int tank) {
-        return FluidStack.EMPTY;
-    }
-
-    @Override
-    public int getTankCapacity(int tank) {
-        return 1000;
-    }
-
-    @Override
-    public boolean isFluidValid(int tank, @Nonnull FluidStack stack) {
-        return false;
-    }
-
-    @Override
-    public int fill(FluidStack resource, FluidAction action) {
-
-        final Deque<FluidP2PTunnelPart> stack = this.getDepth();
-
-        for (final FluidP2PTunnelPart t : stack) {
-            if (t == this) {
-                return 0;
+            if (te != null) {
+                fluidHandler = te.getCapability(CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY,
+                        this.getSide().getOpposite().getFacing());
             }
         }
+        return fluidHandler.orElse(NULL_FLUID_HANDLER);
+    }
 
-        stack.push(this);
+    private class InputFluidHandler implements IFluidHandler {
 
-        final List<FluidP2PTunnelPart> list = this.getOutputs(resource.getFluid());
-        int requestTotal = 0;
-
-        Iterator<FluidP2PTunnelPart> i = list.iterator();
-
-        while (i.hasNext()) {
-            final FluidP2PTunnelPart l = i.next();
-            final IFluidHandler tank = l.getTarget().orElse(null);
-            if (tank != null) {
-                l.tmpUsed = tank.fill(resource.copy(), FluidAction.SIMULATE);
-            } else {
-                l.tmpUsed = 0;
-            }
-
-            if (l.tmpUsed <= 0) {
-                i.remove();
-            } else {
-                requestTotal += l.tmpUsed;
-            }
+        @Override
+        public int getTanks() {
+            return 1;
         }
 
-        if (requestTotal <= 0) {
-            if (stack.pop() != this) {
-                throw new IllegalStateException("Invalid Recursion detected.");
+        @Override
+        @Nonnull
+        public FluidStack getFluidInTank(int tank) {
+            return FluidStack.EMPTY;
+        }
+
+        @Override
+        public int getTankCapacity(int tank) {
+            return Integer.MAX_VALUE;
+        }
+
+        @Override
+        public boolean isFluidValid(int tank, @Nonnull FluidStack stack) {
+            return true;
+        }
+
+        @Override
+        public int fill(FluidStack resource, FluidAction action) {
+            int total = 0;
+
+            try {
+                final int outputTunnels = FluidP2PTunnelPart.this.getOutputs().size();
+                final int amount = resource.getAmount();
+
+                if (outputTunnels == 0 || amount == 0) {
+                    return 0;
+                }
+
+                final int amountPerOutput = Math.max(1, amount / outputTunnels);
+                int overflow = amountPerOutput == 0 ? amount : amount % amountPerOutput;
+
+                for (FluidP2PTunnelPart target : FluidP2PTunnelPart.this.getOutputs()) {
+                    final IFluidHandler output = target.getAttachedFluidHandler();
+                    final int toSend = amountPerOutput + overflow;
+                    final FluidStack fillWithFluidStack = resource.copy();
+                    fillWithFluidStack.setAmount(toSend);
+
+                    final int received = output.fill(fillWithFluidStack, action);
+
+                    overflow = toSend - received;
+                    total += received;
+                }
+
+                if (action == FluidAction.EXECUTE) {
+                    FluidP2PTunnelPart.this.queueTunnelDrain(PowerUnits.RF, total);
+                }
+            } catch (GridAccessException ignored) {
             }
 
+            return total;
+        }
+
+        @Override
+        @Nonnull
+        public FluidStack drain(FluidStack resource, FluidAction action) {
+            return FluidStack.EMPTY;
+        }
+
+        @Override
+        @Nonnull
+        public FluidStack drain(int maxDrain, FluidAction action) {
+            return FluidStack.EMPTY;
+        }
+
+    }
+
+    private class OutputFluidHandler implements IFluidHandler {
+
+        @Override
+        public int getTanks() {
+            return FluidP2PTunnelPart.this.getAttachedFluidHandler().getTanks();
+        }
+
+        @Override
+        @Nonnull
+        public FluidStack getFluidInTank(int tank) {
+            return FluidP2PTunnelPart.this.getAttachedFluidHandler().getFluidInTank(tank);
+        }
+
+        @Override
+        public int getTankCapacity(int tank) {
+            return FluidP2PTunnelPart.this.getAttachedFluidHandler().getTankCapacity(tank);
+        }
+
+        @Override
+        public boolean isFluidValid(int tank, @Nonnull FluidStack stack) {
+            return FluidP2PTunnelPart.this.getAttachedFluidHandler().isFluidValid(tank, stack);
+        }
+
+        @Override
+        public int fill(FluidStack resource, FluidAction action) {
             return 0;
         }
 
-        if (action != FluidAction.EXECUTE) {
-            if (stack.pop() != this) {
-                throw new IllegalStateException("Invalid Recursion detected.");
-            }
-
-            return Math.min(resource.getAmount(), requestTotal);
+        @Override
+        @Nonnull
+        public FluidStack drain(FluidStack resource, FluidAction action) {
+            return FluidP2PTunnelPart.this.getAttachedFluidHandler().drain(resource, action);
         }
 
-        int available = resource.getAmount();
-
-        i = list.iterator();
-        int used = 0;
-
-        while (i.hasNext() && available > 0) {
-            final FluidP2PTunnelPart l = i.next();
-
-            final FluidStack insert = resource.copy();
-            insert.setAmount((int) Math.ceil(insert.getAmount() * ((double) l.tmpUsed / (double) requestTotal)));
-            if (insert.getAmount() > available) {
-                insert.setAmount(available);
-            }
-
-            final IFluidHandler tank = l.getTarget().orElse(null);
-            if (tank != null) {
-                l.tmpUsed = tank.fill(insert.copy(), action);
-            } else {
-                l.tmpUsed = 0;
-            }
-
-            available -= insert.getAmount();
-            used += l.tmpUsed;
+        @Override
+        @Nonnull
+        public FluidStack drain(int maxDrain, FluidAction action) {
+            return FluidP2PTunnelPart.this.getAttachedFluidHandler().drain(maxDrain, action);
         }
-
-        if (stack.pop() != this) {
-            throw new IllegalStateException("Invalid Recursion detected.");
-        }
-
-        return used;
     }
 
-    @Override
-    @Nonnull
-    public FluidStack drain(FluidStack resource, FluidAction action) {
-        return FluidStack.EMPTY;
-    }
+    private static class NullFluidHandler implements IFluidHandler {
 
-    @Override
-    @Nonnull
-    public FluidStack drain(int maxDrain, FluidAction action) {
-        return FluidStack.EMPTY;
-    }
-
-    private Deque<FluidP2PTunnelPart> getDepth() {
-        Deque<FluidP2PTunnelPart> s = DEPTH.get();
-
-        if (s == null) {
-            DEPTH.set(s = new ArrayDeque<>());
+        @Override
+        public int getTanks() {
+            return 0;
         }
 
-        return s;
-    }
-
-    private List<FluidP2PTunnelPart> getOutputs(final Fluid input) {
-        final List<FluidP2PTunnelPart> outs = new ArrayList<>();
-
-        try {
-            for (final FluidP2PTunnelPart l : this.getOutputs()) {
-                final IFluidHandler handler = l.getTarget().orElse(null);
-
-                if (handler != null) {
-                    outs.add(l);
-                }
-            }
-        } catch (final GridAccessException e) {
-            // :P
+        @Override
+        @Nonnull
+        public FluidStack getFluidInTank(int tank) {
+            return FluidStack.EMPTY;
         }
 
-        return outs;
-    }
-
-    private LazyOptional<IFluidHandler> getTarget() {
-        if (!this.getProxy().isActive()) {
-            return null;
+        @Override
+        public int getTankCapacity(int tank) {
+            return 0;
         }
 
-        if (this.cachedTank != null) {
-            return this.cachedTank;
+        @Override
+        public boolean isFluidValid(int tank, @Nonnull FluidStack stack) {
+            return false;
         }
 
-        final TileEntity te = this.getTile().getWorld()
-                .getTileEntity(this.getTile().getPos().offset(this.getSide().getFacing()));
-
-        if (te != null && te.getCapability(CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY,
-                this.getSide().getFacing().getOpposite()).isPresent()) {
-            return this.cachedTank = te.getCapability(CapabilityFluidHandler.FLUID_HANDLER_CAPABILITY,
-                    this.getSide().getFacing().getOpposite());
+        @Override
+        public int fill(FluidStack resource, FluidAction action) {
+            return 0;
         }
 
-        return null;
+        @Override
+        @Nonnull
+        public FluidStack drain(FluidStack resource, FluidAction action) {
+            return FluidStack.EMPTY;
+        }
+
+        @Override
+        @Nonnull
+        public FluidStack drain(int maxDrain, FluidAction action) {
+            return FluidStack.EMPTY;
+        }
     }
 
 }

src/main/java/appeng/recipes/handlers/GrinderRecipe.java

@@ -14,9 +14,13 @@ import net.minecraft.util.NonNullList;
 import net.minecraft.util.ResourceLocation;
 import net.minecraft.world.World;
 
+import appeng.core.AppEng;
+
 public class GrinderRecipe implements IRecipe<IInventory> {
 
-    public static IRecipeType<GrinderRecipe> TYPE;
+    public static final ResourceLocation TYPE_ID = new ResourceLocation(AppEng.MOD_ID, "grinder");
+
+    public static final IRecipeType<GrinderRecipe> TYPE = IRecipeType.register(TYPE_ID.toString());
 
     private final ResourceLocation id;
     private final String group;

src/main/java/appeng/recipes/handlers/GrinderRecipeSerializer.java

@@ -29,7 +29,7 @@ public class GrinderRecipeSerializer extends ForgeRegistryEntry<IRecipeSerialize
     public static final GrinderRecipeSerializer INSTANCE = new GrinderRecipeSerializer();
 
     static {
-        INSTANCE.setRegistryName(AppEng.MOD_ID, "grinder");
+        INSTANCE.setRegistryName(GrinderRecipe.TYPE_ID);
     }
 
     private GrinderRecipeSerializer() {

src/main/java/appeng/recipes/handlers/InscriberRecipe.java

@@ -11,10 +11,13 @@ import net.minecraft.util.ResourceLocation;
 import net.minecraft.world.World;
 
 import appeng.api.features.InscriberProcessType;
+import appeng.core.AppEng;
 
 public class InscriberRecipe implements IRecipe<IInventory> {
 
-    public static IRecipeType<InscriberRecipe> TYPE;
+    public static final ResourceLocation TYPE_ID = new ResourceLocation(AppEng.MOD_ID, "inscriber");
+
+    public static final IRecipeType<InscriberRecipe> TYPE = IRecipeType.register(TYPE_ID.toString());
 
     private final ResourceLocation id;
     private final String group;

src/main/java/appeng/recipes/handlers/InscriberRecipeSerializer.java

@@ -23,7 +23,7 @@ public class InscriberRecipeSerializer extends ForgeRegistryEntry<IRecipeSeriali
     public static final InscriberRecipeSerializer INSTANCE = new InscriberRecipeSerializer();
 
     static {
-        INSTANCE.setRegistryName(AppEng.MOD_ID, "inscriber");
+        INSTANCE.setRegistryName(InscriberRecipe.TYPE_ID);
     }
 
     private InscriberRecipeSerializer() {

src/main/java/appeng/tile/networking/CableBusTileEntity.java

@@ -310,7 +310,7 @@ public class CableBusTileEntity extends AEBaseTileEntity implements AEMultiTile
         IPart part = this.getPart(partLocation);
         LazyOptional<T> result = part == null ? LazyOptional.empty() : part.getCapability(capabilityClass);
 
-        if (result != null) {
+        if (result.isPresent()) {
             return result;
         }