ARX 反回曲线上一定距离的点 函数

////反回曲线上一定距离的点（默认从起点开始计算）////pCurve:曲线指针，dist：距离，point：要返回的点////Adesk::Boolean isGotoNext  true:沿着正向寻找，false：沿着反方向寻找static void GetPtAtDistOnCurve(const AcGeCurve2d* pCurve,const AcGePoint2d& ptInput,double dist,AcGePoint2d& point,Adesk::Boolean isGotoNext){if(pCurve == NULL){return;}AcGePoint2d ptS;ptS = ptInput;double pa = 0.0;double datumParam = 0.0;//Adesk::Boolean posParamDir = Adesk::kTrue;datumParam = pCurve->paramOf(ptS);pa = pCurve->paramAtLength(datumParam,dist,isGotoNext);point = pCurve->evalPoint(pa);}