PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL

SVGPathSeg.PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL field

对应一个“相对平滑二次曲线to”（t）路径数据指令。

public const ushort PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL;