protected internal override void GenerateBound() { const float shearEpsilon = 0.01f; const float penMax = 2f; Pen p = _pen.Content; //画笔的宽度较大时,转角长度会很长,需要特别计算Bound if (p != null && p.Width > penMax) { //存在倾斜,需要特别计算 Bound = (Math.Abs(_shear) > shearEpsilon) ? Calculation.GetPenAndMatrixBounds(BasePath, p, Matrix) : Calculation.GetPenBounds(Path, p); } else { base.GenerateBound(); } }