diff --git a/utils/g2d/shape.go b/utils/g2d/shape.go
index 0b00ddb..9c33f09 100644
--- a/utils/g2d/shape.go
+++ b/utils/g2d/shape.go
@@ -283,7 +283,7 @@ func SearchNotRepeatStraightLine(minLength int, xys ...[2]int) (result [][][2]in
 		}
 	end:
 		{
-			if len(find) != 2 {
+			if len(points) < minLength-1 {
 				continue
 			}
 			result = append(result, append(points, [2]int{x + left, y + top}))