找最大圆柱面，然后找最大圆柱面的edge里和圆柱轴线平行的edge，然后，用edge的相交面找下一级面，然后在下一级面里找与圆柱轴平行的最远的线然后取相交面，第二次获得的面都保存起来，然后互相平行的面就是折弯尺寸的标注面，替换原来的代码
csharp
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using View = SolidWorks.Interop.sldworks.View;
namespace tools
{
public class benddim
{
public static void 标折弯尺寸(ISldWorks swApp)
{
try
{
var swModel = (ModelDoc2)swApp.ActiveDoc;
if (swModel == null) { Console.WriteLine("没有活动文档"); return; }
var swSelMgr = (SelectionMgr)swModel.SelectionManager;
if (swSelMgr.GetSelectedObjectType3(1, -1) != (int)swSelectType_e.swSelDRAWINGVIEWS)
{ Console.WriteLine("请先选择一个视图"); return; }
var view = (View)swSelMgr.GetSelectedObject(1);
var partDoc = (PartDoc)view.ReferencedDocument;
if (partDoc == null) { Console.WriteLine("无法获取零件文档"); return; }
var xform = (MathTransform)view.ModelToViewTransform;
var xformData = (double[])xform.ArrayData;
var bounds = (double[])view.GetOutline();
var mathUtils = swApp.IGetMathUtility();
int count = 0;
double offset = 0.05;
// 遍历 Body 的特征找折弯
foreach (Body2 body in (object[])partDoc.GetBodies2((int)swBodyType_e.swSolidBody, false))
{
foreach (Feature feat in (object[])body.GetFeatures())
{
var subFeat = (Feature)feat.GetFirstSubFeature();
while (subFeat != null)
{
if (subFeat.GetTypeName() == "OneBend" )
{
Console.WriteLine("找到折弯特征" + subFeat.Name);
if (ProcessBend(swModel, mathUtils, xform, xformData, bounds, subFeat, ref offset))
count++;
}
subFeat = (Feature)subFeat.GetNextSubFeature();
}
}
}
Console.WriteLine($"标注完成，共 {count} 个折弯");
}
catch (Exception ex)
{
Console.WriteLine($"错误: {ex.Message}");
}
}
static bool ProcessBend(ModelDoc2 swModel, MathUtility mathUtils, MathTransform xform,
double[] xformData, double[] bounds, Feature bendFeat, ref double offset)
{
// 1. 找最大圆柱面
Face cylFace = null;
double[] axis = null;
double[] center = null;
double maxArea = 0;
foreach (Face f in (object[])bendFeat.GetFaces())
{
var s = (Surface)f.GetSurface();
if (s.IsCylinder())
{
double area = f.GetArea();
if (area > maxArea)
{
maxArea = area;
var p = (double[])s.CylinderParams;
axis = new[] { p[3], p[4], p[5] };
center = new[] { p[0], p[1], p[2] };
cylFace = f;
}
}
}
if (cylFace == null) return false;
Console.WriteLine("最大圆柱面面积: " + maxArea * 1000000 + " mm^2");
// 2. 找圆柱面的edge里和圆柱轴线平行的edge（直边）
var parallelEdges = new List<Edge>();
foreach (Edge e in (object[])cylFace.GetEdges())
{
var c = (Curve)e.GetCurve();
if (c.IsLine())
{
var lineParams = (double[])c.LineParams;
var edgeDir = new[] { lineParams[3], lineParams[4], lineParams[5] };
if (IsParallel(edgeDir, axis))
{
parallelEdges.Add(e);
}
}
}
if (parallelEdges.Count == 0) return false;
Console.WriteLine("找到 " + parallelEdges.Count + " 条与轴线平行的边");
// 3. 用edge的相交面找下一级面
var firstLevelFaces = new List<Face>();
foreach (var edge in parallelEdges)
{
foreach (Face f in (object[])edge.GetTwoAdjacentFaces())
{
if (f != cylFace && !firstLevelFaces.Contains(f))
{
firstLevelFaces.Add(f);
}
}
}
if (firstLevelFaces.Count == 0) return false;
Console.WriteLine("找到 " + firstLevelFaces.Count + " 个下一级面");
// 4. 在下一级面里找与圆柱轴平行的最远的线，然后取相交面
var secondLevelFaces = new List<Face>();
foreach (var face in firstLevelFaces)
{
Edge farthestEdge = null;
double maxDist = -1;
foreach (Edge e in (object[])face.GetEdges())
{
var c = (Curve)e.GetCurve();
if (c.IsLine())
{
var lineParams = (double[])c.LineParams;
var edgeDir = new[] { lineParams[3], lineParams[4], lineParams[5] };
if (IsParallel(edgeDir, axis))
{
// 计算边到圆柱中心的距离
var pt = new[] { lineParams[0], lineParams[1], lineParams[2] };
double dist = PointToAxisDistance(pt, center, axis);
if (dist > maxDist)
{
maxDist = dist;
farthestEdge = e;
}
}
}
}
if (farthestEdge != null)
{
foreach (Face f in (object[])farthestEdge.GetTwoAdjacentFaces())
{
if (f != face && !secondLevelFaces.Contains(f))
{
secondLevelFaces.Add(f);
}
}
}
}
if (secondLevelFaces.Count < 2) return false;
Console.WriteLine("找到 " + secondLevelFaces.Count + " 个二级面");
// 5. 检查二级面是否为圆柱面，如果是则获取第三级面
var secondaryFaces = new List<Face>(); // 二级面或三级面
foreach (var face in secondLevelFaces)
{
var s = (Surface)face.GetSurface();
if (s.IsCylinder())
{
Console.WriteLine("二级面为圆柱面，继续获取第三级面");
// 二级面是圆柱面，获取与轴线平行的边的相邻面
foreach (Edge e in (object[])face.GetEdges())
{
var c = (Curve)e.GetCurve();
if (c.IsLine())
{
var lineParams = (double[])c.LineParams;
var edgeDir = new[] { lineParams[3], lineParams[4], lineParams[5] };
if (IsParallel(edgeDir, axis))
{
foreach (Face adjFace in (object[])e.GetTwoAdjacentFaces())
{
if (adjFace != face && !secondaryFaces.Contains(adjFace))
{
secondaryFaces.Add(adjFace);
}
}
}
}
}
}
else
{
// 不是圆柱面，直接使用
secondaryFaces.Add(face);
}
}
// 6. 找一级面与二级/三级面中互相平行的面作为标注面
Face f1 = null, f2 = null;
for (int i = 0; i < firstLevelFaces.Count; i++)
{
var s1 = (Surface)firstLevelFaces[i].GetSurface();
if (!s1.IsPlane()) continue;
var p1 = (double[])s1.PlaneParams;
var n1 = new[] { p1[0], p1[1], p1[2] };
for (int j = 0; j < secondaryFaces.Count; j++)
{
var s2 = (Surface)secondaryFaces[j].GetSurface();
if (!s2.IsPlane()) continue;
var p2 = (double[])s2.PlaneParams;
var n2 = new[] { p2[0], p2[1], p2[2] };
// 检查两面是否平行（法向量平行）
if (IsParallel(n1, n2))
{
f1 = firstLevelFaces[i];
f2 = secondaryFaces[j];
Console.WriteLine("找到互相平行的标注面（一级面与二级/三级面）");
break;
}
}
if (f1 != null) break;
}
if (f1 == null || f2 == null)
{
Console.WriteLine("未找到互相平行的一级面与二级/三级面");
return false;
}
// 打印选中面的信息
var ts1 = (Surface)f1.GetSurface();
var ts2 = (Surface)f2.GetSurface();
Console.WriteLine($"标注面1（一级面）: 面积 = {f1.GetArea() * 1000000:F2} mm^2");
Console.WriteLine($"标注面2（二级/三级面）: 面积 = {f2.GetArea() * 1000000:F2} mm^2");
// 确定放置方式
string placement = GetPlacement(f1, xformData);
if (placement == "none") return false;
// 标注
SelectFaceEdge(swModel, f1);
SelectFaceEdge(swModel, f2);
double x, y;
if (placement == "h")
{
x = (bounds[0] + bounds[2]) / 2;
y = bounds[3] - offset;
}
else
{
y = (bounds[1] + bounds[3]) / 2;
x = bounds[0] + offset;
}
swModel.AddDimension2(x, y, 0);
offset += 0.005;
swModel.ClearSelection2(true);
return true;
}
static bool IsParallel(double[] a, double[] b)
{
double dot = Math.Abs(a[0] * b[0] + a[1] * b[1] + a[2] * b[2]);
double ma = Math.Sqrt(a[0] * a[0] + a[1] * a[1] + a[2] * a[2]);
double mb = Math.Sqrt(b[0] * b[0] + b[1] * b[1] + b[2] * b[2]);
return Math.Abs(dot - ma * mb) < 0.001;
}
static double PointToAxisDistance(double[] point, double[] axisCenter, double[] axisDir)
{
// 计算点到轴线的距离
// 向量从轴线中心指向点
double[] v = { point[0] - axisCenter[0], point[1] - axisCenter[1], point[2] - axisCenter[2] };
// 投影到轴线方向
double dot = v[0] * axisDir[0] + v[1] * axisDir[1] + v[2] * axisDir[2];
double axisLen = Math.Sqrt(axisDir[0] * axisDir[0] + axisDir[1] * axisDir[1] + axisDir[2] * axisDir[2]);
double proj = dot / axisLen;
// 投影点
double[] projPoint = {
axisCenter[0] + proj * axisDir[0] / axisLen,
axisCenter[1] + proj * axisDir[1] / axisLen,
axisCenter[2] + proj * axisDir[2] / axisLen
};
// 距离
double dx = point[0] - projPoint[0];
double dy = point[1] - projPoint[1];
double dz = point[2] - projPoint[2];
return Math.Sqrt(dx * dx + dy * dy + dz * dz);
}
static string GetPlacement(Face face, double[] xf)
{
var s = (Surface)face.GetSurface();
if (!s.IsPlane()) return "none";
var p = (double[])s.PlaneParams;
double nx = Math.Abs(p[0]), ny = Math.Abs(p[1]), nz = Math.Abs(p[2]);
if (nx > ny && nx > nz)
return Math.Round(xf[0]) != 0 ? "h" : (Math.Round(xf[1]) != 0 ? "v" : "none");
if (ny > nx && ny > nz)
return Math.Round(xf[3]) != 0 ? "h" : (Math.Round(xf[4]) != 0 ? "v" : "none");
if (nz > nx && nz > ny)
return Math.Round(xf[6]) != 0 ? "h" : (Math.Round(xf[7]) != 0 ? "v" : "none");
return "none";
}
static void SelectFaceEdge(ModelDoc2 model, Face face)
{
var ent = (Entity)face;
ent.Select4(true, null);
}
static double[] TransformPoint(MathUtility math, MathTransform xf, double[] pt)
{
var mp = (MathPoint)math.CreatePoint(pt);
mp = (MathPoint)mp.MultiplyTransform(xf);
return (double[])mp.ArrayData;
}
}
}