Add Minecraft coordinate boundary mapper

src/main/java/com/livingworld/integration/minecraft/MinecraftCoordinateMapper.java

@@ -0,0 +1,33 @@
+package com.livingworld.integration.minecraft;
+
+import com.livingworld.regions.RegionCoordinate;
+
+/**
+ * Converts platform coordinate values into Living World coordinates.
+ */
+public final class MinecraftCoordinateMapper {
+
+    public RegionCoordinate fromBlockPos(
+            String dimensionId,
+            int blockX,
+            int blockZ,
+            int regionSizeChunks) {
+        return RegionCoordinate.fromBlock(
+                dimensionId,
+                blockX,
+                blockZ,
+                regionSizeChunks);
+    }
+
+    public RegionCoordinate fromChunkPos(
+            String dimensionId,
+            int chunkX,
+            int chunkZ,
+            int regionSizeChunks) {
+        return RegionCoordinate.fromChunk(
+                dimensionId,
+                chunkX,
+                chunkZ,
+                regionSizeChunks);
+    }
+}

src/test/java/com/livingworld/integration/minecraft/MinecraftCoordinateMapperTest.java

@@ -0,0 +1,25 @@
+package com.livingworld.integration.minecraft;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import com.livingworld.regions.RegionCoordinate;
+import org.junit.jupiter.api.Test;
+
+class MinecraftCoordinateMapperTest {
+
+    private final MinecraftCoordinateMapper mapper = new MinecraftCoordinateMapper();
+
+    @Test
+    void mapsBlockCoordinatesThroughRegionCoordinate() {
+        assertEquals(
+                new RegionCoordinate("minecraft:overworld", -2, 1),
+                mapper.fromBlockPos("minecraft:overworld", -129, 128, 8));
+    }
+
+    @Test
+    void mapsChunkCoordinatesThroughRegionCoordinate() {
+        assertEquals(
+                new RegionCoordinate("minecraft:the_nether", -1, 1),
+                mapper.fromChunkPos("minecraft:the_nether", -1, 8, 8));
+    }
+}