Add inventory.

archive/rpg/entity/entity.h

@@ -0,0 +1,77 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "entitydir.h"
+#include "entityanim.h"
+#include "entitytype.h"
+#include "npc.h"
+
+typedef struct map_s map_t;
+
+typedef struct entity_s {
+  uint8_t id;
+  entitytype_t type;
+  entitytypedata_t data;
+
+  // Movement
+  entitydir_t direction;
+  worldpos_t position;
+  worldpos_t lastPosition;
+
+  entityanim_t animation;
+  float_t animTime;
+} entity_t;
+
+extern entity_t ENTITIES[ENTITY_COUNT];
+
+/**
+ * Initializes an entity structure.
+ * 
+ * @param entity Pointer to the entity structure to initialize.
+ * @param type The type of the entity.
+ */
+void entityInit(entity_t *entity, const entitytype_t type);
+
+/**
+ * Updates an entity.
+ * 
+ * @param entity Pointer to the entity structure to update.
+ */
+void entityUpdate(entity_t *entity);
+
+/**
+ * Turn an entity to face a new direction.
+ * 
+ * @param entity Pointer to the entity to turn.
+ * @param direction The direction to face.
+ */
+void entityTurn(entity_t *entity, const entitydir_t direction);
+
+/**
+ * Make an entity walk in a direction.
+ * 
+ * @param entity Pointer to the entity to make walk.
+ * @param direction The direction to walk in.
+ */
+void entityWalk(entity_t *entity, const entitydir_t direction);
+
+/**
+ * Gets the entity at a specific world position.
+ * 
+ * @param map Pointer to the map to check.
+ * @param pos The world position to check.
+ * @return Pointer to the entity at the position, or NULL if none.
+ */
+entity_t *entityGetAt(const worldpos_t pos);
+
+/**
+ * Gets an available entity index.
+ * 
+ * @return The index of an available entity, or 0xFF if none are available.
+ */
+uint8_t entityGetAvailable();