addSVGPath append arcTo arcTo beziersTo bezierTo clear closeFigure copy crossWithPath genericRoundLines getCount getEndPoint getEndTangent getLength getNodeType getPoint getPoints getStartPoint getStartTangent getSubPathCount getTypes horzTo isClosed isCurve isLine isLines linesTo lineTo m_data MgPath MgPath MgPath MgPath moveTo quadsTo quadTo reverse scanSegments setPath setPath setPoint smoothBezierTo smoothQuadTo startFigure transform trimStart vertTo ~MgPath

trimStart() bool MgPath::trimStart ( const Point2d &  pt, float  dist  ) 从起始方向去掉给定距离的段，即最终路径的起点与原起点的距离为dist 这是这个函数的调用关系图: