picture控件画坐标系

对双缓存下的DXF文件解析，包括对轴、直线、圆、椭圆、圆弧和solid等的描述，包含DXF 文件解析的好多内容，旨在对DXF文件更好的学习，利用MFC工程下建立C++程序，利于明白AUTOCAD生成的图形格式是怎么在C++工程中显示的。

ChartCtrl_source
ChartAxis.cpp
ChartAxis.h
ChartAxisLabel.cpp
ChartAxisLabel.h
ChartBalloonLabel.h
ChartBalloonLabel.inl
ChartBarSerie.cpp
ChartBarSerie.h
ChartCandlestickSerie.cpp
ChartCandlestickSerie.h
ChartCrossHairCursor.cpp
ChartCrossHairCursor.h
ChartCtrl.cpp
ChartCtrl.h
ChartCursor.cpp
ChartCursor.h
ChartDateTimeAxis.cpp
ChartDateTimeAxis.h
ChartDragLineCursor.cpp
ChartDragLineCursor.h
ChartFont.cpp
ChartFont.h
ChartGanttSerie.cpp
ChartGanttSerie.h
ChartGradient.cpp
ChartGradient.h
ChartGrid.cpp
ChartGrid.h
ChartLabel.h
ChartLabel.inl
ChartLegend.cpp
ChartLegend.h
ChartLineSerie.cpp
ChartLineSerie.h
ChartLogarithmicAxis.cpp
ChartLogarithmicAxis.h
ChartMouseListener.h
ChartPointsArray.h
ChartPointsArray.inl
ChartPointsSerie.cpp
ChartPointsSerie.h
ChartScrollBar.cpp
ChartScrollBar.h
ChartSerie.cpp
ChartSerie.h
ChartSerieBase.h
ChartSerieBase.inl
ChartSeriesMouseListener.h
ChartStandardAxis.cpp
ChartStandardAxis.h
ChartString.h
ChartSurfaceSerie.cpp
ChartSurfaceSerie.h
ChartTitle.cpp
ChartTitle.h
ChartXYSerie.cpp
ChartXYSerie.h
PointsOrdering.h
PIDDemoDlg.cpp
Matrix.cpp
Matrix.h
PID.cpp
PID.h