c# - Revit API - Can't paint generated Direct Shapes

Question

I generate all of them the same, but some of them can't be colored (image on the bottom)

Steps:

1. I'm creating list of faces from solid

   internal static List<List<XYZ>> GetFacesFromSolidTriangulate(Solid geomSolid)
   {
       List<List<XYZ>> faces = new List<List<XYZ>>();
   
       foreach (Face face in geomSolid.Faces)
       {
           Mesh mesh_space = face.Triangulate();
   
           for (int i = 0; i < mesh_space.NumTriangles; i++)
           {
               MeshTriangle triangle = mesh_space.get_Triangle(i);
   
               XYZ p1 = triangle.get_Vertex(0);
               XYZ p2 = triangle.get_Vertex(1);
               XYZ p3 = triangle.get_Vertex(2);
               List<XYZ> xyz = new List<XYZ>();
   
               xyz.Add(triangle.get_Vertex(0));
               xyz.Add(triangle.get_Vertex(1));
               xyz.Add(triangle.get_Vertex(2));
   
               faces.Add(xyz);
           }
       }
   
       return faces;
   }
   

2. I'm creating Direct Shape using

   static public DirectShape NewDrawDirectShape(Document doc, List<List<XYZ>> faces, ElementId matId, string name)
   {
       TessellatedShapeBuilder builder = new TessellatedShapeBuilder();
       builder.OpenConnectedFaceSet(true);
   
       foreach(List<XYZ> face in faces)
       {
           builder.AddFace(new TessellatedFace(face, matId));
       }
   
       builder.CloseConnectedFaceSet();
       builder.Build();
   
       TessellatedShapeBuilderResult result = builder.GetBuildResult();
   
       DirectShape ds = DirectShape.CreateElement(doc, new ElementId(BuiltInCategory.OST_GenericModel));
   
       ds.SetShape(result.GetGeometricalObjects());
       ds.Name = name;
   
       return ds;
   }
   

And here is the problem, I can't paint few of them even using Revit "paint" tool... Red arrow define what I'm trying achieve on this direct shape, blue direct shapes works correctly

标签： c#triangulationvertexrevit-apiface

Answer 1

你检查过三角形的方向吗？可能对象中返回的某些三角形的MeshTriangle方向不正确。要尝试一下，您可以在每个三角形的中心创建一条小模型线，指示其法线向量和边缘方向。