Selection 可以获取一切选中的物体 比如将所有动画状态进行全连接

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[MenuItem("SelectTools/GetSelection")]
static void GetSelection()
{
Object[] objects = Selection.objects;
List<AnimatorState> states=new List<AnimatorState>();
foreach(var obj in objects)
{
if (obj.GetType() == typeof(AnimatorState))
{
states.Add(obj as AnimatorState);
}
}

for(int i = 0; i < states.Count; ++i)
{
for(int j = i + 1; j < states.Count; ++j)
{
states[i].AddTransition(states[j]);
states[j].AddTransition(states[i]);
}
}
}