Fix room boundary math (room generation too small)

room-api/src/main/java/dev/compactmods/machines/api/room/RoomTemplate.java

@@ -10,37 +10,41 @@
 import net.minecraft.world.phys.AABB;
 import net.minecraft.world.phys.Vec3;
 
-import java.util.Objects;
-
 import static dev.compactmods.machines.api.Constants.MOD_ID;
 
 /**
  * Template structure for creating a new Compact Machine room. These can be added and removed from the registry
  * at any point, so persistent data must be stored outside these instances.
  *
- * @param dimensions      The internal dimensions of the room when it is created.
+ * @param internalDimensions      The internal dimensions of the room when it is created.
  * @param color           The color of the machine blocks created for this template.
  * @param prefillTemplate A template (structure) file reference, if specified this will fill the new room post-generation
  */
-public record RoomTemplate(Vec3i dimensions, int color, ResourceLocation prefillTemplate) {
+public record RoomTemplate(Vec3i internalDimensions, int color, ResourceLocation prefillTemplate) {
 
     public static final ResourceKey<Registry<RoomTemplate>> REGISTRY_KEY = ResourceKey.createRegistryKey(new ResourceLocation(MOD_ID, "room_templates"));
 
     public static final ResourceLocation NO_TEMPLATE = new ResourceLocation(Constants.MOD_ID, "empty");
     public static final RoomTemplate INVALID_TEMPLATE = new RoomTemplate(0, 0);
 
     public static Codec<RoomTemplate> CODEC = RecordCodecBuilder.create(i -> i.group(
-            Vec3i.CODEC.fieldOf("dimensions").forGetter(RoomTemplate::dimensions),
+            Vec3i.CODEC.fieldOf("dimensions").forGetter(RoomTemplate::internalDimensions),
             Codec.INT.fieldOf("color").forGetter(RoomTemplate::color),
             ResourceLocation.CODEC.optionalFieldOf("template", NO_TEMPLATE).forGetter(RoomTemplate::prefillTemplate)
     ).apply(i, RoomTemplate::new));
 
-    public RoomTemplate(int cubicSize, int color) {
-        this(new Vec3i(cubicSize, cubicSize, cubicSize), color, NO_TEMPLATE);
+    public RoomTemplate(int cubicSizeInternal, int color) {
+        this(new Vec3i(cubicSizeInternal, cubicSizeInternal, cubicSizeInternal), color, NO_TEMPLATE);
     }
 
     public AABB getZeroBoundaries() {
-        return AABB.ofSize(Vec3.ZERO, dimensions.getX(), dimensions.getY(), dimensions.getZ())
-                .move(0, dimensions.getY() / 2f, 0);
+        return AABB.ofSize(Vec3.ZERO, internalDimensions.getX(), internalDimensions.getY(), internalDimensions.getZ())
+                .inflate(1)
+                .move(0, internalDimensions.getY() / 2f, 0);
+    }
+
+    public AABB getBoundariesCenteredAt(Vec3 center) {
+        return AABB.ofSize(center, internalDimensions.getX(), internalDimensions.getY(), internalDimensions.getZ())
+                .inflate(1);
     }
 }