first commit

src/main/java/io/github/gaming32/opacbluemapintegration/ChunkPosDirection.java

@@ -0,0 +1,58 @@
+package io.github.gaming32.opacbluemapintegration;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.level.ChunkPos;
+
+public enum ChunkPosDirection {
+    LEFT(-1, 0),
+    FORWARD(0, 1),
+    RIGHT(1, 0),
+    BACKWARD(0, -1);
+
+    public final int x, z;
+    public final ChunkPos value;
+
+    ChunkPosDirection(int x, int z) {
+        this.x = x;
+        this.z = z;
+        this.value = new ChunkPos(x, z);
+    }
+
+    public ChunkPosDirection getLeft() {
+        return rotate(-1);
+    }
+
+    public ChunkPosDirection getRight() {
+        return rotate(1);
+    }
+
+    public ChunkPosDirection getOpposite() {
+        return rotate(2);
+    }
+
+    public ChunkPosDirection rotate(int clockwiseDistance) {
+        return values()[(ordinal() + clockwiseDistance) & 3];
+    }
+
+    public ChunkPos add(ChunkPos pos) {
+        return new ChunkPos(pos.x + x, pos.z + z);
+    }
+
+    public int getEdge(ChunkPos pos) {
+        return switch (this) {
+            case LEFT -> pos.getMinBlockX();
+            case FORWARD -> pos.getMaxBlockZ() + 1;
+            case RIGHT -> pos.getMaxBlockX() + 1;
+            case BACKWARD -> pos.getMinBlockZ();
+        };
+    }
+
+    public static BlockPos getCorner(ChunkPos pos, ChunkPosDirection a, ChunkPosDirection b) {
+        if (a == b || a.getOpposite() == b) {
+            throw new IllegalArgumentException("Corner can't be accessed with opposite directions");
+        }
+        return a.x != 0
+            ? new BlockPos(a.getEdge(pos), 0, b.getEdge(pos))
+            : new BlockPos(b.getEdge(pos), 0, a.getEdge(pos));
+    }
+}