About libgdx engine camera, used libgdx the great God who come help

Help, I want to stage the camera into a 45 -degree angle looking down, will be how to set up . Used used libgdx the great God who came to help. Grateful.
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Since you made ​​a post in good faith , I will be merciful to Bangniding the
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no one roof you . To individual access points knot posted .