Plates,cuboids,triple prisms,quadruple prisms,cylinders were adopted with three kinds of blockage ratios,20%,40% and 60%.

• 选用五种立体结构障碍物,平板、长方体、三棱柱、四棱柱和圆柱,其阻塞比分别有20%25、40%25和60%25。