1 files changed, 51 insertions, 0 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});
+}