获取选择的程序刀轨和当前加工坐标系，获取刀轨数据点转换到加工坐标系，然后创建样条，创建样条是用UG录制的代码，有更好的方法欢迎交流学习一下。 

 void CreateCurve(){tag_t setup_tag;UF_SETUP_ask_setup(&setup_tag);int count = 0;tag_t* objects;UF_UI_ONT_ask_selected_nodes(&count, &objects);if (count != 1){uc1601("选择一个程序或程序组", 1);return;}tag_t initial_wcs;tag_t wcs_value;logical  is_group = TRUE;tag_p_t oprea_list = NULL_TAG;UF_CSYS_ask_wcs(&initial_wcs);UF_NCGROUP_is_group(objects[0], &is_group);if (is_group == TRUE){if (count == 0){uc1601("程序组为空", 1);return;}UF_NCGROUP_ask_member_list(objects[0], &count, &oprea_list);UF_PARAM_ask_tag_value(oprea_list[0], UF_PARAM_MCS, &wcs_value);}else{UF_PARAM_ask_tag_value(objects[0], UF_PARAM_MCS, &wcs_value);}tag_t matrix_tag;double origin[3];UF_CSYS_ask_csys_info(wcs_value, &matrix_tag, origin);UF_CSYS_ask_matrix_values(matrix_tag,Matrix);UF_CSYS_set_wcs(wcs_value);UF_CAM_preferences_t  number;UF_CAM_ask_cam_preferences(&number);number.clsf_decimal_place = 5;UF_CAM_set_cam_preferences(&number);char path_char[133] = "D:\\tmpcls.cls";UF_SETUP_generate_clsf(setup_tag, objects[0], "CLSF_STANDARD", path_char, UF_SETUP_OUTPUT_UNITS_OUTPUT_DEFINED);FILE* fp = fopen(path_char, "r");char fchar[256];if (fp == 0){uc1601("转换失败", 1);return;}string fbuf;int k1 = -1, k2 = -1, k3 = -1, k4 = -1,k5=-1,k6=-1,k7=-1,k8=-1;bool isStart = false;char msg[256];UF_OBJ_ask_name(objects[0],msg);vector<Point3d>points;while (1){if (fgets(fchar, 256, fp) == NULL){break;}fbuf = fchar;if (strstr(fbuf.c_str(), msg)){isStart = true;points.clear();continue;} if (!isStart){continue;}if (fbuf.compare(0, 4, "GOTO") == 0){k1 = k2 = k3 = k4 =k5=k6=k7=k8=-1;k1 = fbuf.find('/', 0);k2 = fbuf.find(',', k1 + 1);k3 = fbuf.find(',', k2 + 1);k4 = fbuf.find(',', k3 + 1);k5 = fbuf.find(',', k4 + 1);k6 = fbuf.find(',', k5 + 1);k7 = fbuf.find(',', k6 + 1);k8 = fbuf.find(',', k7 + 1);double point1[3] = { 0,0,0 };double point2[3] = { 0,0,0 };point1[0] = atof(fbuf.substr(k1 + 1, k2 - k1 - 1).c_str());point1[1] = atof(fbuf.substr(k2 + 1, k3 - k2 - 1).c_str());if (k4 == string::npos){point1[2] = atof(fbuf.substr(k3 + 1, fbuf.length()).c_str());}else{point1[2] = atof(fbuf.substr(k3 + 1, k4 - k3 - 1).c_str());}UF_CSYS_map_point(UF_CSYS_ROOT_WCS_COORDS, point1, UF_CSYS_ROOT_COORDS, point1);UF_CSYS_map_point(UF_CSYS_ROOT_COORDS, point1, UF_CSYS_WORK_COORDS, point1);Point3d point_3d1(point1[0],point1[1],point1[2]);points.push_back(point_3d1);}}UF_CSYS_set_wcs(initial_wcs);CreateSpline(points);}tag_t  CreateSpline(vector<Point3d>points){if (Spline_tag!=NULL){UF_OBJ_delete_object(Spline_tag);Spline_tag = NULL;}if (points.size() == 0){return Spline_tag;}if (points.size() ==1){double point[3] = { points[0].X,points[0].Y,points[1].Z };UF_CURVE_create_point(point, &Spline_tag);return Spline_tag;}try{Session* theSession = Session::GetSession();Part* workPart(theSession->Parts()->Work());Part* displayPart(theSession->Parts()->Display());NXObject* nullNXObject(NULL);Features::StudioSplineBuilderEx* studioSplineBuilderEx1;studioSplineBuilderEx1 = workPart->Features()->CreateStudioSplineBuilderEx(nullNXObject);Point3d origin1(0.0, 0.0, 0.0);Vector3d normal1(0.0, 0.0, 1.0);Plane* plane1;plane1 = workPart->Planes()->CreatePlane(origin1, normal1, SmartObject::UpdateOptionWithinModeling);studioSplineBuilderEx1->SetDrawingPlane(plane1);Point3d origin2(0.0, 0.0, 0.0);Vector3d normal2(0.0, 0.0, 1.0);Plane* plane2;plane2 = workPart->Planes()->CreatePlane(origin2, normal2, SmartObject::UpdateOptionWithinModeling);studioSplineBuilderEx1->SetMovementPlane(plane2);studioSplineBuilderEx1->OrientExpress()->SetReferenceOption(GeometricUtilities::OrientXpressBuilder::ReferenceWcsDisplayPart);studioSplineBuilderEx1->SetMatchKnotsType(Features::StudioSplineBuilderEx::MatchKnotsTypesNone);studioSplineBuilderEx1->OrientExpress()->SetAxisOption(GeometricUtilities::OrientXpressBuilder::AxisPassive);studioSplineBuilderEx1->OrientExpress()->SetPlaneOption(GeometricUtilities::OrientXpressBuilder::PlanePassive);studioSplineBuilderEx1->SetDegree(1);for (int i = 0; i < points.size(); i++){Point* point1;point1 = workPart->Points()->CreatePoint(points[i]);Features::GeometricConstraintData* geometricConstraintData1;geometricConstraintData1 = studioSplineBuilderEx1->ConstraintManager()->CreateGeometricConstraintData();geometricConstraintData1->SetPoint(point1);studioSplineBuilderEx1->ConstraintManager()->Append(geometricConstraintData1);}NXObject* nXObject1;nXObject1 = studioSplineBuilderEx1->Commit();studioSplineBuilderEx1->Destroy();if (nXObject1){Features::Feature* feature1 = dynamic_cast<Features::Feature*>(nXObject1);vector<NXObject*>vec = feature1->GetEntities();if (!vec.empty()){Spline_tag = vec[0]->Tag();}}return Spline_tag;}catch (const std::exception&){return Spline_tag;}}