algorithm, we get corresponding skeleton shown in Figure 3b. Then we apply the GA-based shot placement algorithm, resulting in three shots for the target: one 14 mm helmet and two 8 mm Imets. The locations and sizes of the helmets in 2D are indicated in Figure 3c, while 3D shot lacements are shown in figure 4. (2003--130 6、画示意图 The irrigation order and position of sprinklers are presented in Figure 4.(2006-127) This algorithm can be viewed in the flowchart in Figure 3. We define some of the objects found in the chart (2006-164\165)algorithm, we get corresponding skeleton shown in Figure 3b. Then we apply the GA-based shot placement algorithm, resulting in three shots for the target: one 14 mm helmet and two 8 mm helmets. The locations and sizes of the helmets in 2D are indicated in Figure 3c, while 3D shot placements are shown in Figure 4. (2003—130) 6、画示意图： The irrigation order and position of sprinklers are presented in Figure 4. (2006—127) This algorithm can be viewed in the flowchart in Figure 3.We define some of the objects found in the chart. (2006—164\165)