I tried with pole

src/libsm64.c

@@ -1,3 +1,4 @@
+#include "decomp/game/interaction.h"
 #ifndef SM64_LIB_EXPORT
 #define SM64_LIB_EXPORT
 #endif
@@ -55,6 +56,49 @@ struct MarioInstance
 struct ObjPool s_mario_instance_pool = {0, 0};
 struct ObjPool s_fakeobj_instance_pool = {0, 0};
 
+f32 dist_between_objects(struct Object *obj1, struct Object *obj2)
+{
+    if (obj1 == NULL || obj2 == NULL) { return 0; }
+    f32 dx = obj1->oPosX - obj2->oPosX;
+    f32 dy = obj1->oPosY - obj2->oPosY;
+    f32 dz = obj1->oPosZ - obj2->oPosZ;
+
+    return sqrtf(dx * dx + dy * dy + dz * dz);
+}
+
+struct Object *get_closest_pole_object()
+{
+    struct Object *closestObj = NULL;
+    f32 minDist = 0x20000;
+
+    for (int i = 0; i < s_fakeobj_instance_pool.size; i++)
+    {
+        struct Object *obj = &((struct FakeObject *)s_fakeobj_instance_pool.objects[i])->object;
+        if (obj == NULL || obj->activeFlags == ACTIVE_FLAG_DEACTIVATED || !(obj->oInteractType & INTERACT_POLE) || obj == gMarioObject) continue;
+
+        DEBUG_PRINT(
+            "POOL: %d ptr=%p interact=%X active=%X pos=(%f,%f,%f)",
+            i,
+            obj,
+            obj->oInteractType,
+            obj->activeFlags,
+            obj->oPosX,
+            obj->oPosY,
+            obj->oPosZ
+        );
+
+        f32 objDist = dist_between_objects(gMarioObject, obj);
+        if (objDist < minDist)
+        {
+            closestObj = obj;
+            DEBUG_PRINT("Found pole object with ID %d at distance %f", i, objDist);
+            minDist = objDist;
+        }
+    }
+
+    return closestObj;
+}
+
 static void update_button(bool on, u16 button)
 {
     gController.buttonPressed &= ~button;