Fix up the plot area nightmare

Core/build.gradle

@@ -16,6 +16,7 @@ dependencies {
     testAnnotationProcessor("org.projectlombok:lombok:1.18.8")
     implementation("org.jetbrains.kotlin:kotlin-stdlib:1.3.72")
     implementation("org.jetbrains:annotations:19.0.0")
+    implementation 'com.github.davidmoten:rtree:0.8.7'
 }
 
 sourceCompatibility = 1.8
@@ -73,6 +74,7 @@ shadowJar {
         include(dependency("net.kyori:text-serializer-gson:3.0.2"))
         include(dependency("net.kyori:text-serializer-legacy:3.0.2"))
         include(dependency("net.kyori:text-serializer-plain:3.0.2"))
+        include(dependency("com.github.davidmoten:rtree:0.8.7"))
     }
     relocate('net.kyori.text', 'com.plotsquared.formatting.text')
     relocate("org.json", "com.plotsquared.json") {

Core/src/main/java/com/plotsquared/core/plot/PlotWorld.java

@@ -0,0 +1,105 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.plot;
+
+import com.plotsquared.core.location.Location;
+import com.sk89q.worldedit.regions.CuboidRegion;
+import lombok.EqualsAndHashCode;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+/**
+ * A world that contains plots
+ */
+@EqualsAndHashCode
+public abstract class PlotWorld {
+
+    private final String world;
+
+    /**
+     * Create a new plot world with a given world name
+     *
+     * @param world World name
+     */
+    protected PlotWorld(@NotNull final String world) {
+        this.world = world;
+    }
+
+    /**
+     * Get the plot area that contains the given location, or null
+     * if the location is not a part of a plot area.
+     *
+     * @param location Location
+     * @return Containing plot area, or null
+     */
+    @Nullable public abstract PlotArea getArea(@NotNull final Location location);
+
+    /**
+     * Get all plot areas in the world
+     *
+     * @return All plot areas in the world
+     */
+    @NotNull public abstract Collection<PlotArea> getAreas();
+
+    /**
+     * Get all plot areas in a specified region
+     *
+     * @param region Region
+     * @return All areas in the region
+     */
+    @NotNull public abstract Collection<PlotArea> getAreasInRegion(
+        @NotNull final CuboidRegion region);
+
+    /**
+     * Register a new area in the world
+     *
+     * @param area Plot area
+     */
+    public void addArea(@NotNull final PlotArea area) {
+        throw new UnsupportedOperationException("This world type does not allow adding new areas");
+    }
+
+    /**
+     * Remove an area from the world
+     *
+     * @param area Plot area
+     */
+    public void removeArea(@NotNull final PlotArea area) {
+        throw new UnsupportedOperationException("This world type does not allow removing areas");
+    }
+
+    /**
+     * Get the world name
+     *
+     * @return World name
+     */
+    public String getWorld() {
+        return this.world;
+    }
+
+}

Core/src/main/java/com/plotsquared/core/plot/world/DefaultPlotAreaManager.java

@@ -25,143 +25,96 @@
  */
 package com.plotsquared.core.plot.world;
 
-import com.plotsquared.core.collection.QuadMap;
 import com.plotsquared.core.location.Location;
 import com.plotsquared.core.plot.PlotArea;
+import com.plotsquared.core.plot.PlotAreaType;
+import com.plotsquared.core.plot.PlotWorld;
 import com.plotsquared.core.util.StringMan;
 import com.sk89q.worldedit.regions.CuboidRegion;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
-import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
 import java.util.Set;
 
 public class DefaultPlotAreaManager implements PlotAreaManager {
 
     final PlotArea[] noPlotAreas = new PlotArea[0];
-    // All plot areas mapped by world
-    private final HashMap<String, PlotArea[]> plotAreaMap = new HashMap<>();
-    // All plot areas mapped by position
-    private final HashMap<String, QuadMap<PlotArea>> plotAreaGrid = new HashMap<>();
-    private final HashSet<Integer> plotAreaHashCheck = new HashSet<>();
-    // All plot areas
-    private PlotArea[] plotAreas = new PlotArea[0];
+
+    private final Map<String, PlotWorld> plotWorlds = new HashMap<>();
     // Optimization if there are no hash collisions
     private boolean plotAreaHasCollision = false;
-    private String[] worlds = new String[0];
 
     @Override public PlotArea[] getAllPlotAreas() {
-        return plotAreas;
+        final Set<PlotArea> area = new HashSet<>();
+        for (final PlotWorld world : plotWorlds.values()) {
+            area.addAll(world.getAreas());
+        }
+        return area.toArray(new PlotArea[0]);
     }
 
-    @Override public PlotArea getApplicablePlotArea(Location location) {
-        switch (this.plotAreas.length) {
-            case 0:
-                return null;
-            case 1:
-                return this.plotAreas[0].getWorldHash() == location.getWorld().hashCode()
-                    && this.plotAreas[0].contains(location) && (!this.plotAreaHasCollision
-                    || location.getWorld().equals(this.plotAreas[0].getWorldName())) ?
-                    this.plotAreas[0] :
-                    null;
-            case 2:
-            case 3:
-            case 4:
-            case 5:
-            case 6:
-            case 7:
-            case 8:
-                String world = location.getWorld();
-                int hash = world.hashCode();
-                for (PlotArea area : this.plotAreas) {
-                    if (hash == area.getWorldHash()) {
-                        if (area.contains(location.getX(), location.getZ()) && (
-                            !this.plotAreaHasCollision || world.equals(area.getWorldName()))) {
-                            return area;
-                        }
-                    }
-                }
-                return null;
-            default:
-                PlotArea[] areas = this.plotAreaMap.get(location.getWorld());
-                if (areas == null) {
+    @Override @Nullable public PlotArea getApplicablePlotArea(final Location location) {
+        if (location == null) {
             return null;
         }
-                int z;
-                int x;
-                switch (areas.length) {
-                    case 1:
-                        return areas[0];
-                    case 2:
-                    case 3:
-                    case 4:
-                    case 5:
-                    case 6:
-                    case 7:
-                    case 8:
-                        x = location.getX();
-                        z = location.getZ();
-                        for (PlotArea area : areas) {
-                            if (area.contains(x, z)) {
-                                return area;
-                            }
-                        }
+        final PlotWorld world = this.plotWorlds.get(location.getWorld());
+        if (world == null) {
             return null;
-                    default:
-                        QuadMap<PlotArea> search = this.plotAreaGrid.get(location.getWorld());
-                        return search.get(location.getX(), location.getZ());
-                }
         }
+        return world.getArea(location);
     }
 
-    @Override public void addPlotArea(PlotArea plotArea) {
-        HashSet<PlotArea> localAreas =
-            new HashSet<>(Arrays.asList(getPlotAreas(plotArea.getWorldName(), null)));
-        HashSet<PlotArea> globalAreas = new HashSet<>(Arrays.asList(plotAreas));
-        localAreas.add(plotArea);
-        globalAreas.add(plotArea);
-        this.plotAreas = globalAreas.toArray(new PlotArea[0]);
-        this.plotAreaMap.put(plotArea.getWorldName(), localAreas.toArray(new PlotArea[0]));
-        QuadMap<PlotArea> map = this.plotAreaGrid.get(plotArea.getWorldName());
-        if (map == null) {
-            map = new QuadMap<PlotArea>(Integer.MAX_VALUE, 0, 0) {
-                @Override public CuboidRegion getRegion(PlotArea value) {
-                    return value.getRegion();
-                }
-            };
-            this.plotAreaGrid.put(plotArea.getWorldName(), map);
-        }
-        map.add(plotArea);
-    }
-
-    @Override public void removePlotArea(PlotArea area) {
-        ArrayList<PlotArea> globalAreas = new ArrayList<>(Arrays.asList(plotAreas));
-        globalAreas.remove(area);
-        this.plotAreas = globalAreas.toArray(new PlotArea[0]);
-        if (globalAreas.isEmpty()) {
-            this.plotAreaMap.remove(area.getWorldName());
-            this.plotAreaGrid.remove(area.getWorldName());
+    @Override public void addPlotArea(final PlotArea plotArea) {
+        PlotWorld world = this.plotWorlds.get(plotArea.getWorldName());
+        if (world != null) {
+            if (world instanceof StandardPlotWorld && world.getAreas().isEmpty()) {
+                this.plotWorlds.remove(plotArea.getWorldName());
             } else {
-            this.plotAreaMap.put(area.getWorldName(), globalAreas.toArray(new PlotArea[0]));
-            this.plotAreaGrid.get(area.getWorldName()).remove(area);
+                world.addArea(plotArea);
+                return;
+            }
+        }
+        if (plotArea.getType() != PlotAreaType.PARTIAL) {
+            world = new StandardPlotWorld(plotArea.getWorldName(), plotArea);
+        } else {
+            world = new ScatteredPlotWorld(plotArea.getWorldName());
+            world.addArea(plotArea);
+        }
+        this.plotWorlds.put(plotArea.getWorldName(), world);
+    }
+
+    @Override public void removePlotArea(final PlotArea area) {
+        final PlotWorld world = this.plotWorlds.get(area.getWorldName());
+        if (world == null) {
+            return;
+        }
+        if (world instanceof StandardPlotWorld) {
+            this.plotWorlds.remove(world.getWorld());
+        } else {
+            world.removeArea(area);
+            if (world.getAreas().isEmpty()) {
+                this.plotWorlds.remove(world.getWorld());
+            }
         }
     }
 
-    @Override public PlotArea getPlotArea(String world, String id) {
-        PlotArea[] areas = this.plotAreaMap.get(world);
-        if (areas == null) {
+    @Override public PlotArea getPlotArea(final String world, final String id) {
+        final PlotWorld plotWorld = this.plotWorlds.get(world);
+        if (plotWorld == null) {
             return null;
         }
-        if (areas.length == 1) {
-            return areas[0];
-        } else if (id == null) {
+        final List<PlotArea> areas = new ArrayList<>(plotWorld.getAreas());
+        if (areas.size() == 1) {
+            return areas.get(0);
+        }
+        if (id == null) {
             return null;
         }
-        for (PlotArea area : areas) {
+        for (final PlotArea area : areas) {
             if (StringMan.isEqual(id, area.getId())) {
                 return area;
             }
@@ -169,103 +122,37 @@ public class DefaultPlotAreaManager implements PlotAreaManager {
         return null;
     }
 
-    @Override public PlotArea getPlotArea(@NotNull Location location) {
-        switch (this.plotAreas.length) {
-            case 0:
-                return null;
-            case 1:
-                PlotArea pa = this.plotAreas[0];
-                if (pa.contains(location)) {
-                    return pa;
-                } else {
-                    return null;
-                }
-            case 2:
-            case 3:
-            case 4:
-            case 5:
-            case 6:
-            case 7:
-            case 8:
-                String world = location.getWorld();
-                int hash = world.hashCode();
-                for (PlotArea area : this.plotAreas) {
-                    if (hash == area.getWorldHash()) {
-                        if (area.contains(location.getX(), location.getZ()) && (
-                            !this.plotAreaHasCollision || world.equals(area.getWorldName()))) {
-                            return area;
-                        }
-                    }
-                }
-                return null;
-            default:
-                PlotArea[] areas = this.plotAreaMap.get(location.getWorld());
-                if (areas == null) {
-                    return null;
-                }
-                int x;
-                int z;
-                switch (areas.length) {
-                    case 0:
-                        PlotArea a = areas[0];
-                        return a.contains(location.getX(), location.getZ()) ? a : null;
-                    case 2:
-                    case 3:
-                    case 4:
-                    case 5:
-                    case 6:
-                    case 7:
-                    case 8:
-                        x = location.getX();
-                        z = location.getZ();
-                        for (PlotArea area : areas) {
-                            if (area.contains(x, z)) {
-                                return area;
-                            }
-                        }
-                        return null;
-                    default:
-                        QuadMap<PlotArea> search = this.plotAreaGrid.get(location.getWorld());
-                        return search.get(location.getX(), location.getZ());
-                }
-        }
+    @Override public PlotArea getPlotArea(@NotNull final Location location) {
+        return this.getApplicablePlotArea(location);
     }
 
-    @Override public PlotArea[] getPlotAreas(String world, CuboidRegion region) {
+    @Override public PlotArea[] getPlotAreas(final String world, final CuboidRegion region) {
+        final PlotWorld plotWorld = this.plotWorlds.get(world);
+        if (plotWorld == null) {
+            return noPlotAreas;
+        }
         if (region == null) {
-            PlotArea[] areas = this.plotAreaMap.get(world);
-            if (areas == null) {
-                return noPlotAreas;
-            }
-            return areas;
-        }
-        QuadMap<PlotArea> areas = this.plotAreaGrid.get(world);
-        if (areas == null) {
-            return noPlotAreas;
-        } else {
-            Set<PlotArea> found = areas.get(region);
-            return found.toArray(new PlotArea[0]);
+            return plotWorld.getAreas().toArray(new PlotArea[0]);
         }
+        return plotWorld.getAreasInRegion(region).toArray(new PlotArea[0]);
     }
 
-    @Override public void addWorld(String worldName) {
-        if (!this.plotAreaHasCollision && !this.plotAreaHashCheck.add(worldName.hashCode())) {
-            this.plotAreaHasCollision = true;
+    @Override public void addWorld(final String worldName) {
+        PlotWorld world = this.plotWorlds.get(worldName);
+        if (world != null) {
+            return;
         }
-        Set<String> tmp = new LinkedHashSet<>();
-        Collections.addAll(tmp, worlds);
-        tmp.add(worldName);
-        worlds = tmp.toArray(new String[0]);
+        // Create a new empty world. When a new area is added
+        // the world will be re-recreated with the correct type
+        world = new StandardPlotWorld(worldName, null);
+        this.plotWorlds.put(worldName, world);
     }
 
-    @Override public void removeWorld(String worldName) {
-        Set<String> tmp = new LinkedHashSet<>();
-        Collections.addAll(tmp, worlds);
-        tmp.remove(worldName);
-        worlds = tmp.toArray(new String[0]);
+    @Override public void removeWorld(final String worldName) {
+        this.plotWorlds.remove(worldName);
     }
 
     @Override public String[] getAllWorlds() {
-        return worlds;
+        return this.plotWorlds.keySet().toArray(new String[0]);
     }
 }

Core/src/main/java/com/plotsquared/core/plot/world/PlotAreaManager.java

@@ -29,6 +29,7 @@ import com.plotsquared.core.location.Location;
 import com.plotsquared.core.plot.PlotArea;
 import com.sk89q.worldedit.regions.CuboidRegion;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 public interface PlotAreaManager {
 
@@ -44,7 +45,7 @@ public interface PlotAreaManager {
      * @param location The location
      * @return An applicable area, or null
      */
-    PlotArea getApplicablePlotArea(Location location);
+    @Nullable PlotArea getApplicablePlotArea(Location location);
 
     /**
      * Get the plot area, if there is any, for the given

Core/src/main/java/com/plotsquared/core/plot/world/ScatteredPlotWorld.java

@@ -0,0 +1,110 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.plot.world;
+
+import com.github.davidmoten.rtree.Entry;
+import com.github.davidmoten.rtree.RTree;
+import com.github.davidmoten.rtree.geometry.Geometries;
+import com.github.davidmoten.rtree.geometry.Geometry;
+import com.plotsquared.core.location.Location;
+import com.plotsquared.core.plot.PlotArea;
+import com.plotsquared.core.plot.PlotWorld;
+import com.plotsquared.core.util.RegionUtil;
+import com.sk89q.worldedit.regions.CuboidRegion;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import rx.Observable;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.LinkedList;
+import java.util.List;
+
+/**
+ * Plot world that contains several plot areas (clusters)
+ */
+public class ScatteredPlotWorld extends PlotWorld {
+
+    private final List<PlotArea> areas = new LinkedList<>();
+    private final Object treeLock = new Object();
+    private RTree<PlotArea, Geometry> areaTree;
+
+    /**
+     * Create a new plot world with a given world name
+     *
+     * @param world World name
+     */
+    public ScatteredPlotWorld(@NotNull final String world) {
+        super(world);
+    }
+
+    @Override @Nullable public PlotArea getArea(@NotNull final Location location) {
+        synchronized (this.treeLock) {
+            final Observable<Entry<PlotArea, Geometry>> area =
+                areaTree.search(Geometries.point(location.getX(), location.getZ()));
+            if (area.isEmpty().toBlocking().first()) {
+                return null;
+            }
+            return area.toBlocking().first().value();
+        }
+    }
+
+    @Override @NotNull public Collection<PlotArea> getAreas() {
+        return Collections.unmodifiableCollection(this.areas);
+    }
+
+    @Override public void addArea(@NotNull final PlotArea area) {
+        this.areas.add(area);
+        this.buildTree();
+    }
+
+    @Override public void removeArea(@NotNull final PlotArea area) {
+        this.areas.remove(area);
+        this.buildTree();
+    }
+
+    @Override @NotNull public Collection<PlotArea> getAreasInRegion(@NotNull final CuboidRegion region) {
+        synchronized (this.treeLock) {
+            final List<PlotArea> areas = new LinkedList<>();
+            this.areaTree.search(RegionUtil.toRectangle(region)).toBlocking().forEach(entry -> areas.add(entry.value()));
+            return areas;
+        }
+    }
+
+    /**
+     * Rebuild the area tree
+     */
+    private void buildTree() {
+        synchronized (this.treeLock) {
+            this.areaTree = RTree.create();
+            for (final PlotArea area : areas) {
+                this.areaTree = this.areaTree.add(area,
+                    RegionUtil.toRectangle(area.getRegion()));
+            }
+        }
+    }
+
+}

Core/src/main/java/com/plotsquared/core/plot/world/StandardPlotWorld.java

@@ -0,0 +1,65 @@
+/*
+ *       _____  _       _    _____                                _
+ *      |  __ \| |     | |  / ____|                              | |
+ *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
+ *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
+ *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
+ *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
+ *                                    | |
+ *                                    |_|
+ *            PlotSquared plot management system for Minecraft
+ *                  Copyright (C) 2020 IntellectualSites
+ *
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.plotsquared.core.plot.world;
+
+import com.plotsquared.core.location.Location;
+import com.plotsquared.core.plot.PlotArea;
+import com.plotsquared.core.plot.PlotWorld;
+import com.sk89q.worldedit.regions.CuboidRegion;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+import java.util.Collections;
+
+/**
+ * Ordinary plot world with a single plot area
+ */
+public class StandardPlotWorld extends PlotWorld {
+
+    private final PlotArea area;
+
+    public StandardPlotWorld(@NotNull final String world, @Nullable final PlotArea area) {
+        super(world);
+        this.area = area;
+    }
+
+    @Override @Nullable public PlotArea getArea(@NotNull final Location location) {
+        return this.area;
+    }
+
+    @Override @NotNull public Collection<PlotArea> getAreas() {
+        if (this.area == null) {
+            return Collections.emptyList();
+        }
+        return Collections.singletonList(this.area);
+    }
+
+    @Override @NotNull public Collection<PlotArea> getAreasInRegion(@NotNull final CuboidRegion region) {
+        return this.getAreas();
+    }
+
+}

Core/src/main/java/com/plotsquared/core/util/RegionUtil.java

@@ -25,9 +25,13 @@
  */
 package com.plotsquared.core.util;
 
+import com.github.davidmoten.rtree.geometry.Geometries;
+import com.github.davidmoten.rtree.geometry.Rectangle;
 import com.plotsquared.core.plot.Plot;
+import com.sk89q.worldedit.math.BlockVector2;
 import com.sk89q.worldedit.math.BlockVector3;
 import com.sk89q.worldedit.regions.CuboidRegion;
+import org.jetbrains.annotations.NotNull;
 
 public class RegionUtil {
     public static CuboidRegion createRegion(int pos1x, int pos2x, int pos1z, int pos2z) {
@@ -54,6 +58,12 @@ public class RegionUtil {
             .getY() && y <= max.getY();
     }
 
+    @NotNull public static Rectangle toRectangle(@NotNull final CuboidRegion region) {
+        final BlockVector2 min = region.getMinimumPoint().toBlockVector2();
+        final BlockVector2 max = region.getMaximumPoint().toBlockVector2();
+        return Geometries.rectangle(min.getX(), min.getZ(), max.getX(), max.getZ());
+    }
+
     // Because WE (not fawe) lack this for CuboidRegion
     public static boolean intersects(CuboidRegion region, CuboidRegion other) {
         BlockVector3 regionMin = region.getMinimumPoint();