_drawPolygon _xf beginPaint beginShape calcPenColor calcPenWidth copy drawArc drawArc3P drawArrayHead drawBeeline drawBeziers drawBeziers drawBSplines drawCircle drawEllipse drawEllipse drawHandle drawHermiteSplines drawLine drawLines drawPath drawPath_ drawPathWithArrayHead drawPie drawPolygon drawQuadSplines drawRayline drawRect drawRoundRect drawTextAt drawTextAt endPaint endShape fromHandle getBkColor getCanvas getClipBox getClipModel getClipWorld GiGraphics GiGraphics GiGraphics isDrawing isGrayMode isPrint isStopping m_impl operator= rawBeginPath rawBeziers rawBezierTo rawClosePath rawEllipse rawEndPath rawImage rawLine rawLines rawLineTo rawMoveTo rawPolygon rawQuadTo rawRect rawText setBkColor setBrush setClipBox setClipWorld setGrayMode setMaxPenWidth setPen setPenWidthFactor setPhaseEnabled stopDrawing toHandle xf ~GiGraphics

drawArc3P() bool GiGraphics::drawArc3P ( const GiContext *  ctx, const Point2d &  startpt, const Point2d &  midpt, const Point2d &  endpt, bool  modelUnit = true  ) 给定线上三点绘制椭圆弧，模型坐标或世界坐标 参数 ctx 绘图参数，忽略填充参数，为NULL时取为上一个绘图参数 startpt 起点 midpt 中点 endpt 终点 modelUnit 指定的坐标尺寸是模型坐标(true)还是世界坐标(false) 返回 是否显示成功。失败原因为参数错误或超出剪裁区域 函数调用图: