_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

drawRayline() bool GiGraphics::drawRayline ( const GiContext *  ctx, const Point2d &  startPt, const Point2d &  endPt, bool  modelUnit = true  ) 绘制射线，模型坐标或世界坐标