/// <summary>
/// 将楼梯中所有与选择的表面相同方向的面上都生成面层
/// </summary>
/// <param name="docTran"> </param>
/// <param name="elem"> 用来生成面层的单元。此函数会搜索此单元中所有与 baseFace 同法向的面，并进行面层的绘制 </param>
/// <param name="pickedFace"> 楼梯中用来生成面层的那个面</param>
/// <param name="faceOp"> 生成面层的选项</param>
/// <param name="transf"> </param>
/// <returns></returns>
private IList <DirectShape> ExtendToFacesWithSameNormal(Transaction docTran, Element elem, PlanarFace pickedFace, FaceOptions faceOp, Transform transf)
{
IList <DirectShape> directShapes = new List <DirectShape>();
// 值中的false 表示solid 是 Family中的solid，后期还要再进行一次transform才能变换 Familyinstance 所对应的位置
Dictionary <Solid, bool> solids = GeoHelper.GetSolidsInModel(elem, GeoHelper.SolidVolumnConstraint.Positive);
foreach (Solid solid in solids.Keys)
{
foreach (Face face in solid.Faces)
{
if ((face is PlanarFace))
{
PlanarFace planarFace = (PlanarFace)face;
if (GeoHelper.IsSameDirection(planarFace.FaceNormal, transf.OfVector(pickedFace.FaceNormal)))
{
DirectShape ds = ConstructSurfaceFromPlanarFace(docTran, planarFace, faceOp, Transform.Identity);
if (ds != null)
{
directShapes.Add(ds);
}
}
}
}
}
return(directShapes);
}
/// <summary>
/// 判断当前创建出来的那个实体是否与其他单元相交，如果相交，则在原实体中剪除相交的部分，如果没有相交，则直接返回原实体集合（集合中的元素个数与原 originalSolids 集合中元素个数相同）。
/// </summary>
/// <param name="directShape"></param>
/// <param name="originalSolids"> directShape 所对应的实体，由于 ExecuteBooleanOperationModifyingOriginalSolid 函数中的 OriginalSolid
/// 不能是直接从Revit的Element中得到的，所以要将前面通过轮廓拉伸出来的实体作为参数传入。</param>
/// <param name="hasIntersect"></param>剪切后的实体的体积有可能不大于 0 啊
/// <returns> 返回的集合中的元素个数与原 originalSolids 集合中元素个数相同。剪切后的实体的体积有可能不大于 0 .</returns>
private IList <Solid> ExcludeIntersect(DirectShape directShape, IList <Solid> originalSolids, out bool hasIntersect)
{
// 应用过滤器，在整个文档中搜索与指定Element相交的Element
FilteredElementCollector collector = new FilteredElementCollector(directShape.Document);
ElementIntersectsElementFilter elementFilter = new ElementIntersectsElementFilter(element: directShape, inverted: false);
collector.WherePasses(elementFilter);
// 排除面层本身
collector.Excluding(new ElementId[] { directShape.Id });
if (!collector.Any())
{
// 说明没有相交的部分
hasIntersect = false;
return(originalSolids);
}
hasIntersect = true;
// 将与其相交的实体进行剪切操作
bool promptWhileError = false;
foreach (Element interSectElem in collector)
{
var interSectSolids = GeoHelper.GetSolidsInModel(interSectElem, GeoHelper.SolidVolumnConstraint.Positive).Keys; // 与面层对象相交的 Element 中所有的实体
for (int i = 0; i < originalSolids.Count; i++)
{
Solid originalS = originalSolids[i];
foreach (Solid interSectS in interSectSolids)
{
try
{
// 在原实体中减去相交的部分
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(originalS, interSectS, BooleanOperationsType.Difference);
}
catch (Exception ex)
{
if (promptWhileError)
{
// 在剪切时如果不能剪切，则不剪切。
DialogResult res = MessageBox.Show("实体剪切时出现错误，可能的原因是面层与模型中的其他实体有细微交叉，" +
"以致剪切后的实体出现细小锯齿。\n\r （忽略此细微交叉对于面层算量并无明显影响）。" +
" \n\r 点击“是”以忽略并继续，点击“否”不再提示。", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Hand, MessageBoxDefaultButton.Button2);
promptWhileError = (res != DialogResult.No);
}
}
}
// 剪切后的实体的体积有可能不大于 0 啊
originalSolids[i] = originalS; // 将剪切完成后的 Solid 再赋值回集合中
}
}
return(originalSolids);
}
public List <PlanarFace> GetMeshedFaces()
{
Mesh mesh = GetMesh();
TessellatedShapeBuilder builder
= new TessellatedShapeBuilder();
builder.OpenConnectedFaceSet(false);
List <XYZ> args = new List <XYZ>(3);
XYZ[] triangleCorners = new XYZ[3];
for (int i = 0; i < mesh.NumTriangles; ++i)
{
MeshTriangle triangle = mesh.get_Triangle(i);
triangleCorners[0] = triangle.get_Vertex(0);
triangleCorners[1] = triangle.get_Vertex(1);
triangleCorners[2] = triangle.get_Vertex(2);
TessellatedFace tesseFace
= new TessellatedFace(triangleCorners,
ElementId.InvalidElementId);
if (builder.DoesFaceHaveEnoughLoopsAndVertices(
tesseFace))
{
builder.AddFace(tesseFace);
}
}
builder.CloseConnectedFaceSet();
TessellatedShapeBuilderResult result
= builder.Build(
TessellatedShapeBuilderTarget.AnyGeometry,
TessellatedShapeBuilderFallback.Mesh,
ElementId.InvalidElementId);
var geo = result.GetGeometricalObjects();
var solids = GeoHelper.GetSolidsInModel(geo, GeoHelper.SolidVolumnConstraint.Any);
var faces = GeoHelper.GetSurfaces(solids.Keys);
return(faces.OfType <PlanarFace>().ToList());
}
