/// <summary>
/// 将一个directShape中的多个Solid进行合并
/// </summary>
/// <param name="originalSolids"></param>
/// <returns>理想情况下，返回的集合中应该只有一个Solid，但是由于Union操作不一定每次都能成功，所以此集合中还会有出现不成功时的那些Solid。</returns>
private List <Solid> UnionSolid(IList <Solid> originalSolids)
{
List <Solid> solids = new List <Solid>();
double v1 = 0;
foreach (Solid s in originalSolids)
{
//
v1 += s.Volume;
}
Solid s1 = originalSolids[0];
solids.Add(s1);
for (int i = 1; i < originalSolids.Count; i++)
{
Solid s2 = originalSolids[i];
try
{
// 将两个实体进行组合
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(s1, s2, BooleanOperationsType.Union);
}
catch (Exception ex)
{
// 说明实体组合不成功，此时应该将未组合进去的Solid记录下来
solids.Add(s2);
}
}
return(solids);
}
/// <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 static bool TryCutSolid(Solid beingCutted, Solid cuts)
{
try
{
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid
(beingCutted, cuts, BooleanOperationsType.Difference);
return(true);
}
catch (InternalException)
{
return(false);
}
}
/***************************************************/
private static List <ISurface> GetOpeningGeometry(Transaction t, Document doc, List <HostObject> hosts, List <ElementId> inserts, FamilyInstance familyInstance, RevitSettings settings = null)
{
List <List <Solid> > solidsWithOpening = new List <List <Solid> >();
foreach (HostObject h in hosts)
{
solidsWithOpening.Add(h.Solids(new Options()).Select(x => SolidUtils.Clone(x)).ToList());
}
// Rollback and restart of the transaction is needed because otherwise the object, to which familyInstance is pointing can become invalidated.
FailureHandlingOptions failureHandlingOptions = t.GetFailureHandlingOptions().SetClearAfterRollback(true);
t.RollBack(failureHandlingOptions);
t.Start();
List <ISurface> surfaces = new List <ISurface> ();
List <CurveLoop> loops = new List <CurveLoop>();
try
{
doc.Delete(inserts);
doc.Regenerate();
for (int i = 0; i < hosts.Count; i++)
{
HostObject h = hosts[i];
List <Autodesk.Revit.DB.Plane> planes = h.IPanelPlanes();
if (planes.Count == 0)
{
continue;
}
List <Solid> fullSolids = h.Solids(new Options()).SelectMany(x => SolidUtils.SplitVolumes(x)).ToList();
if (h is Wall)
{
fullSolids = fullSolids.Select(x => BooleanOperationsUtils.CutWithHalfSpace(x, planes[0])).ToList();
planes[0] = Autodesk.Revit.DB.Plane.CreateByNormalAndOrigin(-planes[0].Normal, planes[0].Origin);
}
foreach (Solid s in fullSolids)
{
foreach (Solid s2 in solidsWithOpening[i])
{
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(s, s2, BooleanOperationsType.Difference);
}
foreach (Autodesk.Revit.DB.Face f in s.Faces)
{
PlanarFace pf = f as PlanarFace;
if (pf == null)
{
continue;
}
if (planes.Any(x => Math.Abs(1 - pf.FaceNormal.DotProduct(x.Normal)) <= settings.DistanceTolerance && Math.Abs((pf.Origin - x.Origin).DotProduct(x.Normal)) <= settings.AngleTolerance))
{
loops.AddRange(pf.GetEdgesAsCurveLoops());
}
}
}
}
}
catch
{
loops = null;
}
t.RollBack(failureHandlingOptions);
if (loops != null)
{
surfaces.AddRange(loops.Select(x => new PlanarSurface(x.FromRevit(), null)));
}
else if (surfaces.Count != 0)
{
BH.Engine.Reflection.Compute.RecordWarning(String.Format("Geometrical processing of a Revit element failed due to an internal Revit error. Converted opening might be missing one or more of its surfaces. Revit ElementId: {0}", familyInstance.Id));
}
return(surfaces);
}
/// <summary>
/// Boolean difference geometric operation, modify the original solid as the result
/// </summary>
/// <param name="solid1">Operation solid 1 and operation result</param>
/// <param name="solid2">Operation solid 2</param>
public static void BooleanOperation_Difference(ref Solid solid1, Solid solid2)
{
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(solid1, solid2, BooleanOperationsType.Difference);
}
/// <summary>
/// Boolean union geometric operation, modify the original solid as the result
/// </summary>
/// <param name="solid1">Operation solid 1 and operation result</param>
/// <param name="solid2">Operation solid 2</param>
public static void BooleanOperation_Union(ref Solid solid1, Solid solid2)
{
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(solid1, solid2, BooleanOperationsType.Union);
}
/// <summary>
/// Boolean intersect geometric operation, modify the original solid as the result
/// </summary>
/// <param name="solid1">Operation solid 1 and operation result</param>
/// <param name="solid2">Operation solid 2</param>
public static void BooleanOperation_Intersect(ref Solid solid1, Solid solid2)
{
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(solid1, solid2, BooleanOperationsType.Intersect);
}
/// <summary>
/// Creates a negative block family from the geometry of the target element and boundaries.
/// </summary>
/// <remarks>This is the main implementation of the sample command.</remarks>
/// <param name="targetElement">The target solid element.</param>
/// <param name="boundaries">The selected curve element boundaries.</param>
/// <param name="familyLoadOptions">The family load options when loading the new family.</param>
/// <param name="familyTemplate">The family template.</param>
public static FailureCondition CreateNegativeBlock(Element targetElement, IList <Reference> boundaries, IFamilyLoadOptions familyLoadOptions, String familyTemplate)
{
Document doc = targetElement.Document;
Autodesk.Revit.ApplicationServices.Application app = doc.Application;
// Get curve loop for boundary
IList <Curve> curves = GetContiguousCurvesFromSelectedCurveElements(doc, boundaries);
CurveLoop loop = null;
try
{
loop = CurveLoop.Create(curves);
}
catch (Autodesk.Revit.Exceptions.ArgumentException)
{
// Curves are not contiguous
return(FailureCondition.CurvesNotContigous);
}
List <CurveLoop> loops = new List <CurveLoop>();
loops.Add(loop);
// Get elevation of loop
double elevation = curves[0].GetEndPoint(0).Z;
// Get height for extrusion
BoundingBoxXYZ bbox = targetElement.get_BoundingBox(null);
double height = bbox.Max.Z - elevation;
if (height <= 1e-5)
{
return(FailureCondition.CurveLoopAboveTarget);
}
height += 1;
// Create family
Document familyDoc = app.NewFamilyDocument(familyTemplate);
// Create block from boundaries
Solid block = GeometryCreationUtilities.CreateExtrusionGeometry(loops, XYZ.BasisZ, height);
// Subtract target element
IList <Solid> fromElement = GetTargetSolids(targetElement);
int solidCount = fromElement.Count;
// Merge all found solids into single one
Solid toSubtract = null;
if (solidCount == 1)
{
toSubtract = fromElement[0];
}
else if (solidCount > 1)
{
toSubtract =
BooleanOperationsUtils.ExecuteBooleanOperation(fromElement[0], fromElement[1], BooleanOperationsType.Union);
}
if (solidCount > 2)
{
for (int i = 2; i < solidCount; i++)
{
toSubtract = BooleanOperationsUtils.ExecuteBooleanOperation(toSubtract, fromElement[i],
BooleanOperationsType.Union);
}
}
// Subtract merged solid from overall block
try
{
BooleanOperationsUtils.ExecuteBooleanOperationModifyingOriginalSolid(block, toSubtract,
BooleanOperationsType.Difference);
}
catch (Autodesk.Revit.Exceptions.InvalidOperationException)
{
return(FailureCondition.NoIntersection);
}
// Create freeform element
using (Transaction t = new Transaction(familyDoc, "Add element"))
{
t.Start();
RevitFreeFormElement element = Autodesk.Revit.DB.FreeFormElement.Create(familyDoc, block);
t.Commit();
}
// Load family into document
Family family = familyDoc.LoadFamily(doc, familyLoadOptions);
familyDoc.Close(false);
// Get symbol as first symbol of loaded family
FilteredElementCollector collector = new FilteredElementCollector(doc);
collector.WherePasses(new FamilySymbolFilter(family.Id));
FamilySymbol fs = collector.FirstElement() as FamilySymbol;
// Place instance at location of original curves
using (Transaction t2 = new Transaction(doc, "Place instance"))
{
t2.Start();
doc.Create.NewFamilyInstance(XYZ.Zero, fs, Autodesk.Revit.DB.Structure.StructuralType.NonStructural);
t2.Commit();
}
return(FailureCondition.Success);
}