UG NX二次开发(C#)-分析-测量曲面的面积

Posted 2022-11-28 GimiGimmy

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1、简要说明

在UG NX中随着版本的更新，测量曲面功能的界面也有所变化，在NX10中，有个单独的“测量面”功能，能测量曲面的面积和长度，如下图所示。

通过搜索查看面测量功能

NX10中的面测量界面
通过面测量能得到单张曲面或者多张曲面的面积。
但是到了NX改版后，其功能界面归属于测量，如NX1984版本中，其不再有单独的面测量功能，而是与其他测量进行了合并，如下图所示。

NX改版后的测量界面
在这个测量功能里面，选择对象，能自动判断测量对象的数据，如选择曲面，则会测量曲面的面积和测量，并能在一个弹出窗口中显示测量信息，如下图所示。

选择一个球体，则能测量出面积、轴侧、半径、质心和最小曲率半径。

2、NX二次开发

如果采用二次开发，测量曲面的面积时，可以通过录制功能来获得测量的代码和函数，如测量一个长方体的一个表面，则通过录制得到以下的代码。

// NX 1980
// Journal created by Administrator on Tue May  3 00:42:33 2022 中国标准时间

//
using System;
using NXOpen;

public class NXJournal

  public static void Main(string[] args)
  
    NXOpen.Session theSession = NXOpen.Session.GetSession();
    NXOpen.Part workPart = theSession.Parts.Work;
    NXOpen.Part displayPart = theSession.Parts.Display;
    // ----------------------------------------------
    //   菜单：分析(L)  ->测量(S)...
    // ----------------------------------------------
    NXOpen.Session.UndoMarkId markId1;
    markId1 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Visible, "起点");
    
    theSession.SetUndoMarkName(markId1, "测量 对话框");
    
    workPart.MeasureManager.SetPartTransientModification();
    
    NXOpen.ScCollector scCollector1;
    scCollector1 = workPart.ScCollectors.CreateCollector();
    
    scCollector1.SetMultiComponent();
    
    workPart.MeasureManager.SetPartTransientModification();
    
    NXOpen.SelectionIntentRuleOptions selectionIntentRuleOptions1;
    selectionIntentRuleOptions1 = workPart.ScRuleFactory.CreateRuleOptions();
    
    selectionIntentRuleOptions1.SetSelectedFromInactive(false);
    
    NXOpen.Face[] faces1 = new NXOpen.Face[1];
    NXOpen.Features.Block block1 = ((NXOpen.Features.Block)workPart.Features.FindObject("BLOCK(7)"));
    NXOpen.Face face1 = ((NXOpen.Face)block1.FindObject("FACE 1 (-157.804011120567,14.3935481774355,100) BLOCK(7)"));
    faces1[0] = face1;
    NXOpen.FaceDumbRule faceDumbRule1;
    faceDumbRule1 = workPart.ScRuleFactory.CreateRuleFaceDumb(faces1, selectionIntentRuleOptions1);
    
    selectionIntentRuleOptions1.Dispose();
    NXOpen.SelectionIntentRule[] rules1 = new NXOpen.SelectionIntentRule[1];
    rules1[0] = faceDumbRule1;
    scCollector1.ReplaceRules(rules1, false);
    
    workPart.MeasureManager.SetPartTransientModification();
    
    NXOpen.ScCollector scCollector2;
    scCollector2 = workPart.ScCollectors.CreateCollector();
    
    scCollector2.SetMultiComponent();
    
    NXOpen.Session.UndoMarkId markId2;
    markId2 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Invisible, "测量");
    
    theSession.DeleteUndoMark(markId2, null);
    
    NXOpen.Session.UndoMarkId markId3;
    markId3 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Invisible, "测量");
    
    NXOpen.Session.UndoMarkId markId4;
    markId4 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Invisible, "Measurement Apply");
    
    workPart.MeasureManager.ClearPartTransientModification();
    
    NXOpen.Session.UndoMarkId markId5;
    markId5 = theSession.SetUndoMark(NXOpen.Session.MarkVisibility.Visible, "Measurement Update");
    
    workPart.MeasureManager.SetPartTransientModification();
    
    theSession.DeleteUndoMark(markId4, "Measurement Apply");
    
    bool datadeleted1;
    datadeleted1 = theSession.DeleteTransientDynamicSectionCutData();
    
    theSession.DeleteUndoMark(markId3, null);
    
    theSession.SetUndoMarkName(markId1, "测量");
    
    scCollector1.Destroy();
    
    scCollector2.Destroy();
    
    workPart.MeasureManager.ClearPartTransientModification();
    
    theSession.DeleteUndoMark(markId5, null);
    
    // ----------------------------------------------
    //   菜单：工具(T)->操作记录(J)->停止录制(S)
    // ----------------------------------------------
    
  
  public static int GetUnloadOption(string dummy)  return (int)NXOpen.Session.LibraryUnloadOption.Immediately;

从这个代码中间，也看不到面积信息，那怎么才能通过二次开发获得曲面的面积呢？我们还是要查看测量的帮助文档，测量面的帮助文档如下图所示。测量面的方法是属于MeasureManager类中NewFaceProperties。

public MeasureFaces NewFaceProperties(
	Unit areaUnit,
	Unit lengthUnit,
	double accuracy,
	ScCollector objects
)

从这个方法中可以看出，其需要4个参数，面积单位、长度单位、精度和需要测量的对象集合。

从这个帮助文档出发，我们编写测量面的方法如下：

/// <summary>
        /// 测量面的体积，可以测量单个，也可以测量多个
        /// </summary>
        /// <param name="faces">测量面对象数组</param>
        /// <param name="area">输出面积的值，单位是mm^2</param>
        /// <param name="perimeter"> 输出面的周长，单位是mm</param >
        public static void MeasureFacesArea(Face[]faces,out double area,out double perimeter)
        
            area = 0.0;
            perimeter = 0.0;
            NXOpen.NXObject nullNXOpen_NXObject = null;
            NXOpen.MeasureFaceBuilder measureFaceBuilder;
            NXOpen.Part workPart = theSession.Parts.Work;
            measureFaceBuilder = workPart.MeasureManager.CreateMeasureFaceBuilder(nullNXOpen_NXObject);
            NXOpen.FaceDumbRule faceDumbRule;
            faceDumbRule = workPart.ScRuleFactory.CreateRuleFaceDumb(faces);
            NXOpen.SelectionIntentRule[] selectionIntentRules = new SelectionIntentRule[1];
            selectionIntentRules[0] = faceDumbRule;
            measureFaceBuilder.FaceCollector.ReplaceRules(selectionIntentRules, false);

            NXOpen.Unit unit = (NXOpen.Unit)workPart.UnitCollection.FindObject(UFConstants.UF_UNIT_AREA_mm2);
            NXOpen.Unit unit1 = (NXOpen.Unit)workPart.UnitCollection.FindObject(UFConstants.UF_UNIT_LENGTH_mm);

            NXOpen.MeasureFaces measureFaces;
            measureFaces = workPart.MeasureManager.NewFaceProperties(unit, unit1, 0.99, measureFaceBuilder.FaceCollector);
            area = measureFaces.Area;
            perimeter = measureFaces.Perimeter;

            measureFaces.Dispose();
            measureFaceBuilder.Destroy();