diff --git a/lib/Const.cpp b/lib/Const.cpp
index 3939a05..896917b 100644
--- a/lib/Const.cpp
+++ b/lib/Const.cpp
@@ -3,3 +3,4 @@
 
 double MAXX = -1e9, MINX = 1e9, MAXY = -1e9, MINY = 1e9, MAXZ = -1e9, MINZ = 1e9; // 卡箍的坐标范围
 double Ycenter, Zcenter;                                                          // 飞机在Y，Z两轴的中心
+int intersection_model = 0;
\ No newline at end of file
diff --git a/lib/include/Const.h b/lib/include/Const.h
index ca97a62..6da5a83 100644
--- a/lib/include/Const.h
+++ b/lib/include/Const.h
@@ -51,9 +51,8 @@ static const P DZ = P(0, 0, 1);
 CONST_API extern double MAXX, MINX, MAXY, MINY, MAXZ, MINZ; // 卡箍的坐标范围,初值-1e9~1e9
 CONST_API extern double Ycenter, Zcenter;					// 飞机在Y，Z两轴的中心
 
-
 // static const double intersection_distance = 100;
-static int intersection_model = 0; //是否判断求交
+CONST_API extern int intersection_model; //是否判断求交
 
 // 判断y是否在[x-margin,z+margin]的范围内
 inline bool inmid(const double x, const double y, const double z, const double margin = MARGIN)