Add inventory.

archive/rpg/rpgcamera.c

@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "rpgcamera.h"
+#include "util/memory.h"
+#include "rpg/entity/entity.h"
+#include "rpg/overworld/map.h"
+#include "assert/assert.h"
+
+rpgcamera_t RPG_CAMERA;
+
+void rpgCameraInit(void) {
+  memoryZero(&RPG_CAMERA, sizeof(rpgcamera_t));
+}
+
+errorret_t rpgCameraUpdate(void) {
+  if(!mapIsLoaded()) errorOk();
+  
+  chunkpos_t chunkPos;
+
+  switch(RPG_CAMERA.mode) {
+    case RPG_CAMERA_MODE_FREE:
+      worldPosToChunkPos(&RPG_CAMERA.free, &chunkPos);
+      break;
+
+    case RPG_CAMERA_MODE_FOLLOW_ENTITY: {
+      entity_t *entity = &ENTITIES[RPG_CAMERA.followEntity.followEntityId];
+      if(entity->type == ENTITY_TYPE_NULL) {
+        errorOk();
+      }
+
+      // Update map position to match camera. By default map wants to know the
+      // top left but we want to set the center, so we need to sub half map size
+      worldPosToChunkPos(&entity->position, &chunkPos);
+      break;
+    }
+
+    default:
+      assertUnreachable("Invalid RPG camera mode");
+  }
+  
+  errorChain(mapPositionSet((chunkpos_t){
+    .x = chunkPos.x - (MAP_CHUNK_WIDTH / 2),
+    .y = chunkPos.y - (MAP_CHUNK_HEIGHT / 2),
+    .z = chunkPos.z - (MAP_CHUNK_DEPTH / 2)
+  }));
+  errorOk();
+}