diff --git a/utils/g2d/physics.go b/utils/g2d/physics.go
index 00a3d07..1dd1fa1 100644
--- a/utils/g2d/physics.go
+++ b/utils/g2d/physics.go
@@ -27,49 +27,6 @@ func SlideDropXY[T any](matrix [][]T, x, y int, isStop func(start T, x, y int, d
 	return
 }
 
-// SlideDropX 侧滑掉落一整列
-//   - 返回每一个成员的x、y轴新坐标
-func SlideDropX[T any](matrix [][]T, x int, isStop func(start T, x, y int, data T) bool) (result [][2]int, change bool) {
-	result = make([][2]int, len(matrix[x]))
-	for y := len(matrix[x]) - 1; y >= 0; y-- {
-		dropX, dropY := SlideDropXY(matrix, x, y, isStop)
-		result[y] = PositionToArray(dropX, dropY)
-		if y != dropY {
-			change = true
-		}
-	}
-	return
-}
-
-// SlideDropY 侧滑掉落一整行
-//   - 返回每一个成员的x、y轴新坐标
-func SlideDropY[T any](matrix [][]T, y int, isStop func(start T, x, y int, data T) bool) (result [][2]int, change bool) {
-	result = make([][2]int, len(matrix))
-	for x := 0; x < len(matrix); x++ {
-		dropX, dropY := SlideDropXY(matrix, x, y, isStop)
-		result[x] = PositionToArray(dropX, dropY)
-		if x != dropX {
-			change = true
-		}
-	}
-	return
-}
-
-// SlideDrop 侧滑掉落整个矩阵
-func SlideDrop[T any](matrix [][]T, isStop func(start T, x, y int, data T) bool) (result [][][2]int, change bool) {
-	result = make([][][2]int, len(matrix))
-	for x := 0; x < len(matrix); x++ {
-		ys := make([][2]int, len(matrix[x]))
-		var dropYs [][2]int
-		dropYs, change = SlideDropX(matrix, x, isStop)
-		for y, position := range dropYs {
-			ys[y] = position
-		}
-		result[x] = ys
-	}
-	return
-}
-
 // VerticalDropXY 垂直掉落特定位置成员
 func VerticalDropXY[T any](matrix [][]T, x, y int, isStop func(start T, x, y int, data T) bool) (dropX, dropY int) {
 	height := len(matrix[0])
@@ -83,46 +40,3 @@ func VerticalDropXY[T any](matrix [][]T, x, y int, isStop func(start T, x, y int
 		offsetY++
 	}
 }
-
-// VerticalDropX 垂直掉落一整列
-//   - 返回每一个成员的y轴新坐标
-func VerticalDropX[T any](matrix [][]T, x int, isStop func(start T, x, y int, data T) bool) (result []int, change bool) {
-	result = make([]int, len(matrix[x]))
-	for y := len(matrix[x]) - 1; y >= 0; y-- {
-		_, dropY := VerticalDropXY(matrix, x, y, isStop)
-		result[y] = dropY
-		if y != dropY {
-			change = true
-		}
-	}
-	return
-}
-
-// VerticalDropY 垂直掉落一整行
-//   - 返回每一个成员的x轴新坐标
-func VerticalDropY[T any](matrix [][]T, y int, isStop func(start T, x, y int, data T) bool) (result []int, change bool) {
-	result = make([]int, len(matrix))
-	for x := 0; x < len(matrix); x++ {
-		dropX, _ := VerticalDropXY(matrix, x, y, isStop)
-		result[x] = dropX
-		if x != dropX {
-			change = true
-		}
-	}
-	return
-}
-
-// VerticalDrop 垂直掉落整个矩阵
-func VerticalDrop[T any](matrix [][]T, isStop func(start T, x, y int, data T) bool) (result [][][2]int, change bool) {
-	result = make([][][2]int, len(matrix))
-	for x := 0; x < len(matrix); x++ {
-		ys := make([][2]int, len(matrix[x]))
-		var dropYs []int
-		dropYs, change = VerticalDropX(matrix, x, isStop)
-		for y, positionY := range dropYs {
-			ys[y] = PositionToArray(x, positionY)
-		}
-		result[x] = ys
-	}
-	return
-}
diff --git a/utils/g2d/radiation_pattern.go b/utils/g2d/radiation_pattern.go
index 7422a8a..13643c7 100644
--- a/utils/g2d/radiation_pattern.go
+++ b/utils/g2d/radiation_pattern.go
@@ -1,6 +1,7 @@
 package g2d
 
 import (
+	"fmt"
 	"github.com/kercylan98/minotaur/utils/hash"
 	"github.com/kercylan98/minotaur/utils/synchronization"
 	"sync"
@@ -159,3 +160,16 @@ func (slf *RadiationPattern[ItemType, Item]) searchNeighbour(x, y int, filter *s
 	})
 	slf.links.Set(itemGuid, neighbours)
 }
+
+func (slf *RadiationPattern[ItemType, Item]) String() string {
+	var g string
+	for y := 0; y < len(slf.matrix[0]); y++ {
+		for x := 0; x < len(slf.matrix); x++ {
+			item := slf.matrix[x][y]
+			g += fmt.Sprintf("%v\t\t", item.GetType())
+		}
+		g += "\r\n"
+	}
+	g += "\r\n"
+	return g
+}