_points Create draw drawArcHandle initialize MgCmdArc3P Name release setStepPoint touchBegan touchEnded touchMoved

setStepPoint() void MgCmdArc3P::setStepPoint ( const MgMotion *  sender, int  step, const Point2d &  pt  ) protectedvirtual 重载 MgCommandDraw . 被 MgCmdArcTan, MgCmdCompass , 以及 MgCmdArcCSE 重载. 函数调用图: 这是这个函数的调用关系图: