Add inventory.

archive/rpg/overworld/worldpos.h

@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "dusk.h"
+#include "duskdefs.h"
+
+#define CHUNK_TILE_COUNT (CHUNK_WIDTH * CHUNK_HEIGHT * CHUNK_DEPTH)
+
+#define MAP_CHUNK_WIDTH 3
+#define MAP_CHUNK_HEIGHT 3
+#define MAP_CHUNK_DEPTH 3
+#define MAP_CHUNK_COUNT (MAP_CHUNK_WIDTH * MAP_CHUNK_HEIGHT * MAP_CHUNK_DEPTH)
+
+typedef int16_t worldunit_t;
+typedef int16_t chunkunit_t;
+typedef int16_t chunkindex_t;
+typedef uint32_t chunktileindex_t;
+
+typedef int32_t worldunits_t;
+typedef int32_t chunkunits_t;
+
+typedef struct worldpos_s {
+  worldunit_t x, y, z;
+} worldpos_t;
+
+typedef struct chunkpos_t {
+  chunkunit_t x, y, z;
+} chunkpos_t;
+
+/**
+ * Compares two world positions for equality.
+ * 
+ * @param a The first world position.
+ * @param b The second world position.
+ * @return true if equal, false otherwise.
+ */
+bool_t worldPosIsEqual(const worldpos_t a, const worldpos_t b);
+
+/**
+ * Converts a world position to a chunk position.
+ * 
+ * @param worldPos The world position.
+ * @param out The output chunk position.
+ */
+void chunkPosToWorldPos(const chunkpos_t* chunkPos, worldpos_t* out);
+
+/**
+ * Converts a chunk position to a world position.
+ * 
+ * @param worldPos The world position.
+ * @param out The output chunk position.
+ */
+void worldPosToChunkPos(const worldpos_t* worldPos, chunkpos_t* out);
+
+/**
+ * Converts a position in world-space to an index inside a chunk that the tile
+ * resides in.
+ * 
+ * @param worldPos The world position.
+ * @return The tile index within the chunk.
+ */
+chunktileindex_t worldPosToChunkTileIndex(const worldpos_t* worldPos);
+
+/**
+ * Converts a chunk position to a world position.
+ * 
+ * @param worldPos The world position.
+ * @param out The output chunk position.
+ */
+chunkindex_t chunkPosToIndex(const chunkpos_t* pos);