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The orientation of Chinese characters is very importantin the interface programming design of Auto CAD DXF documents.Beca-use some parameters are automatically computed by the Auto CADsystem
it is very difficult for Chinese characters to be oriented in DXFinterface programmings.This paper reports the calculating method of ori-ented parameters and the orientation method of Chinese characters in theinterface programming of DXF documents
and gives a general Fortran 77subroutine for the orientation of Chinese characters.The method solves thedifficulty of the orientation of Chinese characters in the interface program-mings of DXF documents
and makes it convenient for various CAD pic-tures to be oriented in Chinese Characters.