ksys/phys: Rename RigidBody/UserTag broadphase border callbacks

src/KingSystem/Physics/System/physUserTag.cpp

@@ -1,9 +1,10 @@
 #include "KingSystem/Physics/System/physUserTag.h"
+#include "KingSystem/Physics/RigidBody/physRigidBody.h"
 
 namespace ksys::phys {
 
-void UserTag::m2(void* a) {
-    // FIXME
+void UserTag::onMaxPositionExceeded(RigidBody* body) {
+    body->onMaxPositionExceeded();
 }
 
 void UserTag::m3(void* a, void* b, float c) {

src/KingSystem/Physics/System/physUserTag.h

@@ -13,8 +13,9 @@ class UserTag {
 public:
     UserTag() = default;
 
-    // FIXME: names and types
-    virtual void m2(void* a);
+    /// Called when a rigid body goes beyond the broadphase border.
+    /// The default implementation just notifies the rigid body of this callback.
+    virtual void onMaxPositionExceeded(RigidBody* body);
     // a and b are probably physics bodies?
     virtual void m3(void* a, void* b, float c);
     virtual void onBodyShapeChanged(RigidBody* body);