#994: Fix changing world in portal events not updating used world border

Also clamp the event's target location to the world border

By: Phoenix616 <max@themoep.de>

paper-server/nms-patches/net/minecraft/world/entity/Entity.patch

@@ -662,7 +662,7 @@
                  }
  
                  this.removeAfterChangingDimensions();
-@@ -2389,20 +2774,33 @@
+@@ -2389,20 +2774,34 @@
  
      @Nullable
      protected ShapeDetectorShape findDimensionEntryPoint(WorldServer worldserver) {
@@ -693,7 +693,8 @@
 +                    return null;
 +                }
 +                final WorldServer worldserverFinal = worldserver = ((CraftWorld) event.getTo().getWorld()).getHandle();
-+                blockposition = new BlockPosition(event.getTo().getX(), event.getTo().getY(), event.getTo().getZ());
++                worldborder = worldserverFinal.getWorldBorder();
++                blockposition = worldborder.clampToBounds(event.getTo().getX(), event.getTo().getY(), event.getTo().getZ());
  
 -                return (ShapeDetectorShape) this.getExitPortal(worldserver, blockposition, flag2, worldborder).map((blockutil_rectangle) -> {
 +                return (ShapeDetectorShape) this.getExitPortal(worldserver, blockposition, flag2, worldborder, event.getSearchRadius(), event.getCanCreatePortal(), event.getCreationRadius()).map((blockutil_rectangle) -> {
@@ -701,7 +702,7 @@
                      IBlockData iblockdata = this.level.getBlockState(this.portalEntrancePos);
                      EnumDirection.EnumAxis enumdirection_enumaxis;
                      Vec3D vec3d;
-@@ -2419,8 +2817,8 @@
+@@ -2419,8 +2818,8 @@
                          vec3d = new Vec3D(0.5D, 0.0D, 0.0D);
                      }
  
@@ -712,7 +713,7 @@
              }
          } else {
              BlockPosition blockposition1;
-@@ -2430,8 +2828,15 @@
+@@ -2430,8 +2829,15 @@
              } else {
                  blockposition1 = worldserver.getHeightmapPos(HeightMap.Type.MOTION_BLOCKING_NO_LEAVES, worldserver.getSharedSpawnPos());
              }
@@ -729,7 +730,7 @@
          }
      }
  
-@@ -2439,8 +2844,23 @@
+@@ -2439,8 +2845,23 @@
          return BlockPortalShape.getRelativePosition(blockutil_rectangle, enumdirection_enumaxis, this.position(), this.getDimensions(this.getPose()));
      }
  
@@ -755,7 +756,7 @@
      }
  
      public boolean canChangeDimensions() {
-@@ -2649,7 +3069,26 @@
+@@ -2649,7 +3070,26 @@
      }
  
      public final void setBoundingBox(AxisAlignedBB axisalignedbb) {
@@ -783,7 +784,7 @@
      }
  
      protected float getEyeHeight(EntityPose entitypose, EntitySize entitysize) {
-@@ -2933,6 +3372,11 @@
+@@ -2933,6 +3373,11 @@
                                      vec3d = vec3d.add(vec3d1);
                                      ++k1;
                                  }