1. 增加McDbPolyline如下函数 SegType segType (unsigned int index) const; Mcad::ErrorStatus getLineSegAt (unsigned int index, McGeLineSeg2d& ln) const; Mcad::ErrorStatus getArcSegAt (unsigned int index,
SegType segType (unsigned int index) const;
Mcad::ErrorStatus getLineSegAt (unsigned int index,
McGeLineSeg2d& ln) const;
Mcad::ErrorStatus getArcSegAt (unsigned int index,
McGeCircArc2d& arc) const;
2. McDbCurve的extend函数，延伸曲线函数
virtual Mcad::ErrorStatus extend(Mdesk::Boolean extendStart,
const McGePoint3d& toPoint);
3.修改图块插入时，标注的中的匿名块，互相覆盖问题
4.增加McDbHatch函数
Mcad::ErrorStatus appendLoop(Mdesk::Int32 loopType,
const McDbObjectIdArray& dbObjIds);
5.增加MxDraw创建视口函数
static McDbObjectId CreateViewport1(McGePoint3d ptLB,McGePoint3d ptRT,
McGePoint3d ptTargetLB,McGePoint3d ptTargetRT
);
6.修改各种细节上的错误。
