feat(fairy): implement fairy with wandering logic

2 files changed, 80 insertions, 40 deletions

diff --git a/src/fairy.c b/src/fairy.c
new file mode 100644
index 0000000..6e9c6cc
--- /dev/null
+++ b/src/fairy.c
@@ -0,0 +1,51 @@
+#include "raylib.h"
+#include "raymath.h"
+#include <math.h>
+
+#include "fairy.h"
+#include "globals.h"
+
+#define FAIRY_WAND_RADIUS 20
+#define FAIRY_STAY_MIN 1
+#define FAIRY_STAY_MAX 3
+#define FAIRY_SMOOTHNESS 0.25f
+
+#define FAIRY_BOB_SPEED 4
+#define FAIRY_BOB_HEIGHT 5
+
+void UpdateFairy(Fairy *fairy, Vector2 playerWorldPosiion) {
+  float deltaTime = GetFrameTime();
+
+  fairy->wandTimer -= deltaTime;
+  if (fairy->wandTimer <= 0) {
+    fairy->targetOffset =
+        (Vector2){GetRandomValue(-FAIRY_WAND_RADIUS, FAIRY_WAND_RADIUS),
+                  GetRandomValue(-FAIRY_WAND_RADIUS, FAIRY_WAND_RADIUS)};
+    fairy->wandTimer = GetRandomValue(FAIRY_STAY_MIN, FAIRY_STAY_MAX);
+  }
+
+  fairy->targetWorld = Vector2Add(playerWorldPosiion, fairy->targetOffset);
+
+  fairy->position = Vector2Lerp(fairy->position, fairy->targetWorld,
+                                FAIRY_SMOOTHNESS * deltaTime);
+}
+
+void DrawFairy(Fairy *fairy) {
+  float bob = sin(GetTime() * FAIRY_BOB_SPEED) * FAIRY_BOB_HEIGHT;
+  int x = (int)fairy->position.x;
+  int y = (int)(fairy->position.y + bob);
+
+  if (debugMode) {
+    DrawCircleV(fairy->targetWorld, 1, RED);
+    DrawCircleV(fairy->position, 1, GREEN);
+  }
+
+  // Outer cross glow
+  DrawRectangle(x, y - 3, 1, 7, (Color){140, 180, 255, 40});
+  DrawRectangle(x - 3, y, 7, 1, (Color){140, 180, 255, 40});
+  // Mid cross
+  DrawRectangle(x, y - 1, 1, 3, (Color){190, 215, 255, 120});
+  DrawRectangle(x - 1, y, 3, 1, (Color){190, 215, 255, 120});
+  // Bright core pixel
+  DrawRectangle(x, y, 1, 1, (Color){255, 255, 255, 255});
+}
diff --git a/src/main.c b/src/main.c
index c50669c..0ffcd6b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,11 +1,12 @@
 // src/main.c
 #include "raylib.h"
 #define RAYTMX_IMPLEMENTATION
-#include "game.h"
-#include "player.h"
-#include "map_manager.h"
 #include "entity.h"
+#include "fairy.h"
+#include "game.h"
 #include "globals.h"
+#include "map_manager.h"
+#include "player.h"
 
 bool debugMode = false;
 
@@ -15,49 +16,34 @@ int main(void) {
 
   GameScreen currentScreen = SCREEN_TITLE;
 
-	MapManager mapMgr = LoadGameMap("assets/maps/debug.tmx");
-  
+  MapManager mapMgr = LoadGameMap("assets/maps/debug.tmx");
+
   EntityManager entityMgr = InitEntityManager(100);
   if (mapMgr.map) {
     SpawnEntitiesFromMap(&entityMgr, mapMgr.map);
   }
-  
+
   RaytmxExternalTileset elfTS = LoadTSX("assets/tilesets/elf.tsx");
-	Player player = { 
-    .position = { 200, 200}, 
-    .speed = 120.0f, 
-    .bounds = { 204, 204, 12, 12 },
-    .tileset = elfTS.tileset,
-    .currentFrame = 0,
-    .frameTime = 0.0f,
-    .state = 0, // idle
-    .facingRight = true
-  };
+  Player player = {.position = {200, 200},
+                   .speed = 120.0f,
+                   .bounds = {204, 204, 12, 12},
+                   .tileset = elfTS.tileset,
+                   .currentFrame = 0,
+                   .frameTime = 0.0f,
+                   .state = 0, // idle
+                   .facingRight = true};
+
+  Fairy fairy = {.position = player.position, .targetOffset = {0}};
 
-  Camera2D camera = { 0 };
+  Camera2D camera = {0};
   camera.offset.x = (float)SCREEN_WIDTH / 2.0f;
   camera.offset.y = (float)SCREEN_HEIGHT / 2.0f;
   camera.target = player.position;
   camera.zoom = 4.0f;
 
   while (!WindowShouldClose()) {
-    if (IsKeyPressed(KEY_B)) debugMode = !debugMode;
-    if (IsKeyPressed(KEY_R)) {
-      // Reload map and entities
-      UnloadGameMap(&mapMgr);
-      UnloadEntityManager(&entityMgr);
-      
-      mapMgr = LoadGameMap("assets/maps/debug.tmx");
-      entityMgr = InitEntityManager(100);
-      if (mapMgr.map) {
-        SpawnEntitiesFromMap(&entityMgr, mapMgr.map);
-      }
-      
-      // Reset player position
-      player.position = (Vector2){ 200, 200 };
-      player.bounds = (Rectangle){ 204, 204, 12, 12 };
-    }
-
+    if (IsKeyPressed(KEY_B))
+      debugMode = !debugMode;
     switch (currentScreen) {
     case SCREEN_TITLE:
       if (IsKeyPressed(KEY_ENTER))
@@ -66,9 +52,10 @@ int main(void) {
     case SCREEN_PLAYING:
       if (IsKeyDown(KEY_ESCAPE))
         currentScreen = SCREEN_PAUSED;
-			UpdatePlayer(&player, &mapMgr);
+      UpdatePlayer(&player, &mapMgr);
+			UpdateFairy(&fairy, player.position);
       UpdateEntities(&entityMgr, &player, &mapMgr);
-			camera.target = player.position;
+      camera.target = player.position;
       break;
     case SCREEN_PAUSED:
       if (IsKeyDown(KEY_ESCAPE))
@@ -82,7 +69,7 @@ int main(void) {
 
     // --- DRAW ---
     BeginDrawing();
-    
+
     switch (currentScreen) {
     case SCREEN_TITLE:
       ClearBackground(BLACK);
@@ -98,10 +85,12 @@ int main(void) {
       {
         DrawMap(&mapMgr);
         DrawEntities(&entityMgr, mapMgr.map);
-				DrawPlayer(&player);
+        DrawPlayer(&player);
+				DrawFairy(&fairy);
       }
       EndMode2D();
-      if (debugMode) DrawFPS(10, 10);
+      if (debugMode)
+        DrawFPS(10, 10);
       break;
     case SCREEN_GAME_OVER:
       ClearBackground(BLACK);
@@ -112,7 +101,7 @@ int main(void) {
     EndDrawing();
   }
 
-	UnloadGameMap(&mapMgr);
+  UnloadGameMap(&mapMgr);
   UnloadEntityManager(&entityMgr);
   UnloadTexture(player.tileset.image.texture);
   CloseWindow();