Make local/relative destinations when possible

src/main/java/org/dimdev/dimdoors/shared/items/ItemRiftSignature.java

@@ -17,6 +17,7 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.world.World;
 import org.dimdev.ddutils.RotatedLocation;
 import org.dimdev.dimdoors.shared.blocks.ModBlocks;
+import org.dimdev.dimdoors.shared.rifts.DestinationMaker;
 import org.dimdev.dimdoors.shared.rifts.destinations.GlobalDestination;
 import org.dimdev.dimdoors.shared.sound.ModSounds;
 import org.dimdev.dimdoors.shared.tileentities.TileEntityFloatingRift;
@@ -70,7 +71,7 @@ public class ItemRiftSignature extends Item {
                 World sourceWorld = target.getLocation().getWorld();
                 sourceWorld.setBlockState(target.getLocation().getPos(), ModBlocks.RIFT.getDefaultState());
                 TileEntityFloatingRift rift1 = (TileEntityFloatingRift) target.getLocation().getTileEntity();
-                rift1.setDestination(new GlobalDestination(new Location(world, pos)));
+                rift1.setDestination(DestinationMaker.relativeIfPossible(target.getLocation(), new Location(world, pos)));
                 rift1.setTeleportTargetRotation(target.getYaw(), 0); // setting pitch to 0 because player is always facing down to place rift
                 rift1.register();
             }
@@ -78,7 +79,7 @@ public class ItemRiftSignature extends Item {
             // Place a rift at the target point
             world.setBlockState(pos, ModBlocks.RIFT.getDefaultState());
             TileEntityFloatingRift rift2 = (TileEntityFloatingRift) world.getTileEntity(pos);
-            rift2.setDestination(new GlobalDestination(target.getLocation()));
+            rift2.setDestination(DestinationMaker.relativeIfPossible(new Location(world, pos), target.getLocation()));
             rift2.setTeleportTargetRotation(player.rotationYaw, 0);
             rift2.register();
 

src/main/java/org/dimdev/dimdoors/shared/items/ItemStabilizedRiftSignature.java

@@ -17,6 +17,7 @@ import org.dimdev.ddutils.Location;
 import org.dimdev.dimdoors.DimDoors;
 import org.dimdev.ddutils.RotatedLocation;
 import org.dimdev.dimdoors.shared.blocks.ModBlocks;
+import org.dimdev.dimdoors.shared.rifts.DestinationMaker;
 import org.dimdev.dimdoors.shared.rifts.destinations.GlobalDestination;
 import org.dimdev.dimdoors.shared.sound.ModSounds;
 import org.dimdev.dimdoors.shared.tileentities.TileEntityFloatingRift;
@@ -77,7 +78,7 @@ public class ItemStabilizedRiftSignature extends Item { // TODO: common supercla
             // Place a rift at the source point
             world.setBlockState(pos, ModBlocks.RIFT.getDefaultState());
             TileEntityFloatingRift rift2 = (TileEntityFloatingRift) world.getTileEntity(pos);
-            rift2.setDestination(new GlobalDestination(target.getLocation()));
+            rift2.setDestination(DestinationMaker.relativeIfPossible(new Location(world, pos), target.getLocation()));
             rift2.setTeleportTargetRotation(player.rotationYaw, 0);
             rift2.register();
 

src/main/java/org/dimdev/dimdoors/shared/rifts/DestinationMaker.java

@@ -0,0 +1,25 @@
+package org.dimdev.dimdoors.shared.rifts;
+
+import net.minecraft.util.math.Vec3i;
+import org.dimdev.ddutils.Location;
+import org.dimdev.dimdoors.shared.rifts.destinations.GlobalDestination;
+import org.dimdev.dimdoors.shared.rifts.destinations.LocalDestination;
+import org.dimdev.dimdoors.shared.rifts.destinations.RelativeDestination;
+
+public final class DestinationMaker {
+    public static RiftDestination localIfPossible(Location from, Location to) {
+        if (from.getDim() != to.getDim()) {
+            return new GlobalDestination(to);
+        } else {
+            return new LocalDestination(to.getPos());
+        }
+    }
+
+    public static RiftDestination relativeIfPossible(Location from, Location to) {
+        if (from.getDim() != to.getDim()) {
+            return new GlobalDestination(to);
+        } else {
+            return new RelativeDestination(new Vec3i(to.getX() - from.getX(), to.getY() - from.getY(), to.getZ() - from.getZ()));
+        }
+    }
+}

src/main/java/org/dimdev/dimdoors/shared/rifts/destinations/AvailableLinkDestination.java

@@ -169,7 +169,7 @@ import java.util.Set;
     private static void linkRifts(Location from, Location to) {
         TileEntityRift tileEntityFrom = (TileEntityRift) from.getTileEntity();
         TileEntityRift tileEntityTo = (TileEntityRift) to.getTileEntity();
-        tileEntityFrom.setDestination(new GlobalDestination(to)); // TODO: local if possible
+        tileEntityFrom.setDestination(DestinationMaker.localIfPossible(from, to));
         tileEntityFrom.markDirty();
         if (tileEntityTo.getProperties() != null) {
             tileEntityTo.getProperties().linksRemaining--;

src/main/java/org/dimdev/dimdoors/shared/rifts/destinations/RestoringDestination.java

@@ -5,6 +5,7 @@ import net.minecraft.nbt.NBTTagCompound;
 import org.dimdev.ddutils.Location;
 import org.dimdev.ddutils.RGBA;
 import org.dimdev.ddutils.RotatedLocation;
+import org.dimdev.dimdoors.shared.rifts.DestinationMaker;
 import org.dimdev.dimdoors.shared.rifts.RiftDestination;
 
 public abstract class RestoringDestination extends RiftDestination {
@@ -27,7 +28,7 @@ public abstract class RestoringDestination extends RiftDestination {
 
         Location linkTarget = makeLinkTarget(loc, entity);
         if (linkTarget != null) {
-            wrappedDestination = new GlobalDestination(linkTarget);
+            wrappedDestination = DestinationMaker.localIfPossible(loc.getLocation(), linkTarget);
             wrappedDestination.register(loc.getLocation());
 
             wrappedDestination.teleport(loc, entity);