diff --git a/server/gameserver/collision.cc b/server/gameserver/collision.cc
index 6eab81e2..7e9c49bb 100644
--- a/server/gameserver/collision.cc
+++ b/server/gameserver/collision.cc
@@ -143,3 +143,12 @@ bool Collision::Check2dRotationRectangle(float rx, float ry, float r, float dx,
 #endif
     return (tmp_dx1 - new_rx) * (tmp_dx1 - new_rx) + (tmp_dy1 - new_ry) * (tmp_dy1 - new_ry) <= r * r;
 }
+
+bool Collision::IsNearInRange(const glm::vec3& center, const glm::vec3& pos, float range)
+{
+
+}
+
+bool Collision::IsNearOutRange(const glm::vec3& center, const glm::vec3& pos, float range) {
+
+}
diff --git a/server/gameserver/collision.h b/server/gameserver/collision.h
index 9379f409..4b27050b 100644
--- a/server/gameserver/collision.h
+++ b/server/gameserver/collision.h
@@ -24,4 +24,7 @@ class Collision
     */
     static bool Check2dRotationRectangle(float rx, float ry, float r, float dx, float dy, float dw, float dh, float dro);
 
+    static bool IsNearInRange(const glm::vec3& center, const glm::vec3& pos, float range);
+    static bool IsNearOutRange(const glm::vec3& center, const glm::vec3& pos, float range);
+
 };