| string :一个碰撞体的名字 name_b | string: 另一个碰撞体的名字 pos_aname_b, pos_a, pos_b, point_num)
for i=0,point_num-1,1 do
ARLOG(name_a .." "..name_b.." "..pos_a[i]:to_stringname_b, pos_a, pos_b, point_num)
for i=0,point_num-1,1 do
ARLOG(name_a .." "..name_b.." "..pos_a[i]:to_string