5 files changed, 84 insertions, 11 deletions

diff --git a/src/entity.h b/src/entity.h
index d0e9f9f..b7c458e 100644
--- a/src/entity.h
+++ b/src/entity.h
@@ -1,4 +1,5 @@
 #include "utils.h"
+#include "assets.h"
 
 // Pretty much any object in the game.
 
@@ -71,6 +72,12 @@ struct Entity {
   void* data;
 };
 
+typedef struct {
+  EntityId id;
+  AssetId texture;
+  int count;
+} EntityItem;
+
 // Cubemap based building.
 typedef struct {
   Model model;
diff --git a/src/game.c b/src/game.c
index fb7e01d..06ce527 100644
--- a/src/game.c
+++ b/src/game.c
@@ -95,6 +95,9 @@ void initGame(Game* game)
   initInteractionChat(&game->interactionChat, &game->settings);
   initInteractionMenu(&game->interactionMenu, &game->settings);
 
+  // Inventory.
+  initInventory(&game->inventory);
+
   disableGameCursor(game);
 }
 
@@ -324,6 +327,7 @@ void updateGameScene(Game* game)
   updateGameStatus(game);
   updateInteractionChat(&game->interactionChat, game);
   updateInteractionMenu(&game->interactionMenu, game);
+  updateInventory(&game->inventory);
 }
 
 void handleGameResize(Game* game)
diff --git a/src/game.h b/src/game.h
index 971dde3..c59d5e9 100644
--- a/src/game.h
+++ b/src/game.h
@@ -28,6 +28,7 @@ struct Game {
   
   InteractionChat interactionChat;
   InteractionMenu interactionMenu;
+  Inventory inventory;
 
   SceneId sceneId;
   bool isCursorEnabled;
diff --git a/src/ui.c b/src/ui.c
index 66560bb..ac176b8 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -228,10 +228,19 @@ void updateInteractionMenu(InteractionMenu* menu, Game* game)
   }
 }
 
+void resizeInventory(Inventory* inventory)
+{
+  inventory->rect.width = 300.0;
+  inventory->rect.height = 300.0;
+  inventory->rect.x = GetRenderWidth() / 2.0 - inventory->rect.width / 2.0;
+  inventory->rect.y = GetRenderHeight() / 2.0 - inventory->rect.height / 2.0;
+}
+
 void initInventory(Inventory* inventory)
 {
-  inventory->visable = false;
-  inventory->itemCount = 0;
+  resizeInventory(inventory);
+  inventory->visable = true;
+  inventory->itemCount = 40;
 }
 
 void showInventory(Inventory* inventory)
@@ -244,10 +253,67 @@ void hideInventory(Inventory* inventory)
   inventory->visable = false;
 }
 
-void addItemToInventory(Inventory* inventory, InventoryItem item)
+void addItemToInventory(Inventory* inventory, EntityItem item)
 {
+  // If item is already in the inventory.
+  for (int index = 0; index < inventory->itemCount; ++index)
+  {
+    if (inventory->items[index].id == item.id)
+    {
+      inventory->items[index].count += item.count;
+      return;
+    }
+  }
+
+  // Add item to inventory.
+  if (inventory->itemCount >= INVENTORY_MAX)
+  {
+    TraceLog(LOG_ERROR, "inventory->itemCount >= INVENTORY_MAX");
+  }
+  else
+  {
+    inventory->items[inventory->itemCount] = item;
+    ++inventory->itemCount;
+  }
 }
 
 void updateInventory(Inventory* inventory)
 {
+  if (IsWindowResized())
+  {
+    resizeInventory(inventory);
+  }
+  
+  if (!inventory->visable)
+  {
+    return;
+  }
+
+  // Draw background.
+  int outlineThickness = 3;
+  DrawRectangleRec(inventory->rect, PINK);
+  DrawRectangleLinesEx(inventory->rect, outlineThickness, BLACK);
+
+  // Draw items.
+  int startX = inventory->rect.x + outlineThickness;
+  int startY = inventory->rect.y + outlineThickness;
+  int maxX = inventory->rect.width + inventory->rect.x - INVENTORY_SPRITE_SIZE;
+  int maxY = inventory->rect.height + inventory->rect.y -
+    INVENTORY_SPRITE_SIZE;
+  int x = startX;
+  int y = startY;
+
+  for (int index = 0; index < inventory->itemCount; ++index)
+  {
+    DrawRectangle(x, y, INVENTORY_SPRITE_SIZE, INVENTORY_SPRITE_SIZE, GRAY);
+    DrawText(TextFormat("%d\n", index), x, y, 16, BLACK);
+
+    x += INVENTORY_SPRITE_SIZE;
+
+    if (x >= maxX)
+    {
+      x = startX;
+      y += INVENTORY_SPRITE_SIZE;
+    }
+  }
 }
diff --git a/src/ui.h b/src/ui.h
index b5089a3..eee1d4f 100644
--- a/src/ui.h
+++ b/src/ui.h
@@ -8,6 +8,7 @@
 
 #define INTERACTION_COLUMN_MAX 80
 #define INVENTORY_MAX 10
+#define INVENTORY_SPRITE_SIZE 42
 
 typedef char InteractionItems[INTERACTION_MENU_MAX][INTERACTION_LABEL_MAX];
 
@@ -31,15 +32,9 @@ typedef struct {
 } InteractionMenu;
 
 typedef struct {
-  EntityId id;
-  AssetId texture;
-  int count;
-} InventoryItem;
-
-typedef struct {
   Rectangle rect;
   bool visable;
-  InventoryItem items[INVENTORY_MAX];
+  EntityItem items[INVENTORY_MAX];
   int itemCount;
 } Inventory;
 
@@ -68,7 +63,7 @@ void updateInteractionMenu(InteractionMenu* menu, Game* game);
 void initInventory(Inventory* inventory);
 void showInventory(Inventory* inventory);
 void hideInventory(Inventory* inventory);
-void addItemToInventory(Inventory* inventory, InventoryItem item);
+void addItemToInventory(Inventory* inventory, EntityItem item);
 void updateInventory(Inventory* inventory);
 
 #endif