273 lines
11 KiB
C#
273 lines
11 KiB
C#
using System.Diagnostics;
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using Autodesk.Revit.DB;
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namespace ShrlAlgoToolkit.RevitCore.Assists
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{
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public class GeometryAssist
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{
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/// <summary>
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/// 获取多个元素的合并包围盒
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/// </summary>
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/// <param name="elements">元素集合</param>
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/// <returns>合并后的 BoundingBoxXYZ，如果集合为空或无有效包围盒则返回 null</returns>
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public static BoundingBoxXYZ GetCombinedBoundingBox(IEnumerable<Element> elements)
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{
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if (elements == null) return null;
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double minX = double.MaxValue;
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double minY = double.MaxValue;
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double minZ = double.MaxValue;
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double maxX = double.MinValue;
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double maxY = double.MinValue;
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double maxZ = double.MinValue;
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bool hasValidBox = false;
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foreach (var elem in elements)
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{
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// 传入 null 表示获取模型坐标系下的包围盒
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BoundingBoxXYZ box = elem.get_BoundingBox(null);
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// 注意：有些元素（如某些基准面或未放置的族实例）可能返回 null
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if (box == null) continue;
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// 比较并更新最小值
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if (box.Min.X < minX) minX = box.Min.X;
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if (box.Min.Y < minY) minY = box.Min.Y;
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if (box.Min.Z < minZ) minZ = box.Min.Z;
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// 比较并更新最大值
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if (box.Max.X > maxX) maxX = box.Max.X;
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if (box.Max.Y > maxY) maxY = box.Max.Y;
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if (box.Max.Z > maxZ) maxZ = box.Max.Z;
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hasValidBox = true;
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}
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if (!hasValidBox) return null;
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// 构造新的包围盒
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BoundingBoxXYZ combinedBox = new BoundingBoxXYZ();
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combinedBox.Min = new XYZ(minX, minY, minZ);
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combinedBox.Max = new XYZ(maxX, maxY, maxZ);
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return combinedBox;
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}
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/// <summary>
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/// 对曲线列表进行排序，使其正确排序和定向，形成线串。
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/// </summary>
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public static void SortCurvesContiguous(IList<Curve> curves, bool debug_output = false)
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{
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const double inch = 1.0 / 12.0;
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const double sixteenth = inch / 16.0;
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int n = curves.Count;
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for (int i = 0; i < n; ++i)
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{
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Curve curve = curves[i];
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XYZ endPoint = curve.GetEndPoint(1);
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XYZ p;
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// 查找起点 = 终点的曲线
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bool found = (i + 1 >= n);
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for (int j = i + 1; j < n; ++j)
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{
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p = curves[j].GetEndPoint(0);
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// 如果匹配 end->start、
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// 这是下一条曲线
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if (sixteenth > p.DistanceTo(endPoint))
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{
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if (debug_output)
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{
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Debug.Print("{0} 起始点, 换成 {1}", j, i + 1);
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}
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if (i + 1 != j)
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{
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Curve tmp = curves[i + 1];
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curves[i + 1] = curves[j];
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curves[j] = tmp;
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}
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found = true;
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break;
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}
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p = curves[j].GetEndPoint(1);
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// 如果有匹配结果 end->end、
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// 反转下一条曲线
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if (sixteenth > p.DistanceTo(endPoint))
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{
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if (i + 1 == j)
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{
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if (debug_output)
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{
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Debug.Print("{0} 终点, 反向 {1}", j, i + 1);
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}
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curves[i + 1] = curves[j].CreateReversed();
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}
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else
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{
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if (debug_output)
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{
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Debug.Print("{0} 终点, 倒换 {1}", j, i + 1);
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}
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Curve tmp = curves[i + 1];
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curves[i + 1] = curves[j].CreateReversed();
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curves[j] = tmp;
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}
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found = true;
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break;
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}
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}
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if (!found)
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{
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throw new Exception("SortCurvesContiguous:" + " 非连续输入曲线");
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}
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}
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}
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public static void CreateDirectShape(
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Document doc,
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List<XYZ> vertices,
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List<Face> faces,
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ElementId graphicsStyleId,
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ElementId categoryId,
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string appGuid,
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string shapeName
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)
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{
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var nFaces = 0;
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var builder = new TessellatedShapeBuilder { LogString = shapeName };
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var corners = new List<XYZ>();
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builder.OpenConnectedFaceSet(false);
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foreach (var f in faces)
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{
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builder.LogInteger = nFaces;
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//if (corners.Capacity < f.Indices.Count)//设置corner的Capacity值，减少内存开销
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//{
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// corners = new ErrorModels<XYZ>(f.Indices.Count);
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//}
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//corners.Clear();
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//foreach (Index i in f.Indices)
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//{
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// if (i.vertex >= vertices.Count)
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// {
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// return;
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// }
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// corners.Add(vertices[i.vertex]);
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//}
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try
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{
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builder.AddFace(new TessellatedFace(corners, ElementId.InvalidElementId));
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}
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catch (Autodesk.Revit.Exceptions.ArgumentException) { }
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}
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builder.CloseConnectedFaceSet();
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builder.Target = TessellatedShapeBuilderTarget.AnyGeometry;
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builder.Fallback = TessellatedShapeBuilderFallback.Mesh;
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builder.GraphicsStyleId = graphicsStyleId;
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builder.Build();
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var ds = DirectShape.CreateElement(doc, categoryId);
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ds.ApplicationId = appGuid;
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ds.ApplicationDataId = shapeName;
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ds.SetShape(builder.GetBuildResult().GetGeometricalObjects());
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ds.Name = shapeName;
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}
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//public BRepBuilder CreateGeo()
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//{
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//BRepBuilder bRepBuilder=new BRepBuilder(BRepType.Solid);
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//BRepBuilderEdgeGeometry.Create();
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//BRepBuilderSurfaceGeometry.Create();
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//BRepBuilderSurfaceGeometry.CreateNURBSSurface();
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//}
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public static void CreateDirectShapeFromCylinder(Document doc)
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{
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// Naming convention for faces and edges: we assume that x is to the left and pointing down, y is horizontal and pointing to the right, z is up
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var brepBuilder = new BRepBuilder(BRepType.Solid);
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// The surfaces of the four faces.
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var basis = new Frame(new XYZ(50, -100, 0), new XYZ(0, 1, 0), new XYZ(-1, 0, 0), new XYZ(0, 0, 1));
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var cylSurf = CylindricalSurface.Create(basis, 50);
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var top = Plane.CreateByNormalAndOrigin(new XYZ(0, 0, 1), new XYZ(0, 0, 100)); // normal points outside the cylinder
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var bottom = Plane.CreateByNormalAndOrigin(new XYZ(0, 0, 1), new XYZ(0, 0, 0)); // normal points inside the cylinder
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// Add the four faces
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var frontCylFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(cylSurf, null), false);
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var backCylFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(cylSurf, null), false);
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var topFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(top, null), false);
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var bottomFaceId = brepBuilder.AddFace(BRepBuilderSurfaceGeometry.Create(bottom, null), true);
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// Geometry for the four semi-circular edges and two vertical linear edges
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var frontEdgeBottom = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(0, -100, 0), new XYZ(100, -100, 0), new XYZ(50, -50, 0)));
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var backEdgeBottom = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(100, -100, 0), new XYZ(0, -100, 0), new XYZ(50, -150, 0)));
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var frontEdgeTop = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(0, -100, 100), new XYZ(100, -100, 100), new XYZ(50, -50, 100)));
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var backEdgeTop = BRepBuilderEdgeGeometry.Create(Arc.Create(new XYZ(0, -100, 100), new XYZ(100, -100, 100), new XYZ(50, -150, 100)));
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var linearEdgeFront = BRepBuilderEdgeGeometry.Create(new XYZ(100, -100, 0), new XYZ(100, -100, 100));
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var linearEdgeBack = BRepBuilderEdgeGeometry.Create(new XYZ(0, -100, 0), new XYZ(0, -100, 100));
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// Add the six edges
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var frontEdgeBottomId = brepBuilder.AddEdge(frontEdgeBottom);
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var frontEdgeTopId = brepBuilder.AddEdge(frontEdgeTop);
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var linearEdgeFrontId = brepBuilder.AddEdge(linearEdgeFront);
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var linearEdgeBackId = brepBuilder.AddEdge(linearEdgeBack);
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var backEdgeBottomId = brepBuilder.AddEdge(backEdgeBottom);
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var backEdgeTopId = brepBuilder.AddEdge(backEdgeTop);
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// Loops of the four faces
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var loopIdTop = brepBuilder.AddLoop(topFaceId);
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var loopIdBottom = brepBuilder.AddLoop(bottomFaceId);
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var loopIdFront = brepBuilder.AddLoop(frontCylFaceId);
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var loopIdBack = brepBuilder.AddLoop(backCylFaceId);
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// Add coedges for the loop of the front face
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brepBuilder.AddCoEdge(loopIdFront, linearEdgeBackId, false);
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brepBuilder.AddCoEdge(loopIdFront, frontEdgeTopId, false);
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brepBuilder.AddCoEdge(loopIdFront, linearEdgeFrontId, true);
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brepBuilder.AddCoEdge(loopIdFront, frontEdgeBottomId, true);
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brepBuilder.FinishLoop(loopIdFront);
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brepBuilder.FinishFace(frontCylFaceId);
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// Add coedges for the loop of the back face
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brepBuilder.AddCoEdge(loopIdBack, linearEdgeBackId, true);
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brepBuilder.AddCoEdge(loopIdBack, backEdgeBottomId, true);
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brepBuilder.AddCoEdge(loopIdBack, linearEdgeFrontId, false);
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brepBuilder.AddCoEdge(loopIdBack, backEdgeTopId, true);
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brepBuilder.FinishLoop(loopIdBack);
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brepBuilder.FinishFace(backCylFaceId);
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// Add coedges for the loop of the top face
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brepBuilder.AddCoEdge(loopIdTop, backEdgeTopId, false);
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brepBuilder.AddCoEdge(loopIdTop, frontEdgeTopId, true);
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brepBuilder.FinishLoop(loopIdTop);
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brepBuilder.FinishFace(topFaceId);
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// Add coedges for the loop of the bottom face
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brepBuilder.AddCoEdge(loopIdBottom, frontEdgeBottomId, false);
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brepBuilder.AddCoEdge(loopIdBottom, backEdgeBottomId, false);
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brepBuilder.FinishLoop(loopIdBottom);
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brepBuilder.FinishFace(bottomFaceId);
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brepBuilder.Finish();
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using var tr = new Transaction(doc, "Create a DirectShape");
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tr.Start();
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var ds = DirectShape.CreateElement(doc, new ElementId(BuiltInCategory.OST_GenericModel));
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ds.SetShape(brepBuilder);
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tr.Commit();
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}
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}
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}
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