GIS professional entry courses- turn left polygon algorithm, the first check point on the screen points, after connecting the triangle, and finally form a polygon automatically.

Packet : 5956464turn.rar filelist
Turn end\MainFrm.cpp
Turn end\MainFrm.h
Turn end\MyLine.cpp
Turn end\MyLine.h
Turn end\MyPoint.cpp
Turn end\MyPoint.h
Turn end\MyPolygon.cpp
Turn end\MyPolygon.h
Turn end\ReadMe.txt
Turn end\res\Toolbar.bmp
Turn end\res\Turn.ico
Turn end\res\Turn.rc2
Turn end\res\TurnDoc.ico
Turn end\Resource.h
Turn end\StdAfx.cpp
Turn end\StdAfx.h
Turn end\Turn.aps
Turn end\Turn.clw
Turn end\Turn.cpp
Turn end\Turn.dsp
Turn end\Turn.dsw
Turn end\Turn.h
Turn end\Turn.ncb
Turn end\Turn.opt
Turn end\Turn.plg
Turn end\Turn.rc
Turn end\TurnDoc.cpp
Turn end\TurnDoc.h
Turn end\TurnView.cpp
Turn end\TurnView.h
Turn end\res
Turn end

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