private bool exportMesh(String filename, Mesh mesh)
{
bool bSaved = false;
try
{
StreamWriter sout = new StreamWriter(filename, false);
sout.WriteLine("P1X, P1Y, P1Z, P2X, P2Y, P2Z, P3X, P3Y, P3Z");
for (int tlp = 0; tlp < mesh.NumTriangles; tlp++)
{
MeshTriangle tri = mesh.get_Triangle(tlp);
XYZ p1 = mesh.Vertices[(int)tri.get_Index(0)];
XYZ p2 = mesh.Vertices[(int)tri.get_Index(1)];
XYZ p3 = mesh.Vertices[(int)tri.get_Index(2)];
String tstr = String.Format("{0:0.000}, {1:0.000}, {2:0.000}, {3:0.000}, {4:0.000}, {5:0.000}, {6:0.000}, {7:0.000}, {8:0.000}", new object[] { p1.X, p1.Y, p1.Z, p2.X, p2.Y, p2.Z, p3.X, p3.Y, p3.Z });
sout.WriteLine(tstr);
}
sout.Close();
bSaved = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Unable to write file", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return(bSaved);
}
/***************************************************/
/**** Public Methods ****/
/***************************************************/
public static oM.Geometry.Face FromRevit(this MeshTriangle triangle)
{
if (triangle == null)
{
return(null);
}
return(new oM.Geometry.Face {
A = (int)triangle.get_Index(0), B = (int)triangle.get_Index(1), C = (int)triangle.get_Index(2)
});
}
static private bool ExportMeshes(List <Mesh> meshes, ref Va3cContainer.Va3cGeometry meshGroupGeometry)
{
foreach (Mesh mesh in meshes)
{
int currentPointNum = meshGroupGeometry.data.points;
int currentTriNum = meshGroupGeometry.data.triangles;
IList <XYZ> points = mesh.Vertices;
int pointNum = points.Count;
int triNum = mesh.NumTriangles;
meshGroupGeometry.data.points += pointNum;
meshGroupGeometry.data.triangles += triNum;
foreach (XYZ point in points)
{
meshGroupGeometry.data.vertices.Add((float)point.X);
meshGroupGeometry.data.vertices.Add((float)point.Y);
meshGroupGeometry.data.vertices.Add((float)point.Z);
//test
meshGroupGeometry.data.normals.Add(0.0f);
meshGroupGeometry.data.normals.Add(0.0f);
meshGroupGeometry.data.normals.Add(1.0f);
meshGroupGeometry.data.uvs.Add(0.0f);
meshGroupGeometry.data.uvs.Add(0.0f);
}
for (int i = 0; i < triNum; ++i)
{
MeshTriangle meshTri = mesh.get_Triangle(i);
int index0 = (int)meshTri.get_Index(0) + currentPointNum;
int index1 = (int)meshTri.get_Index(1) + currentPointNum;
int index2 = (int)meshTri.get_Index(2) + currentPointNum;
meshGroupGeometry.data.indices.Add(index0);
meshGroupGeometry.data.indices.Add(index1);
meshGroupGeometry.data.indices.Add(index2);
}
}
if (meshGroupGeometry.data.points > 0 && meshGroupGeometry.data.triangles > 0)
{
return(true);
}
return(false);
}
/// <summary>
/// Function called before and after triangle merging.
/// Before merging it calculates the Euler characteristic of the original mesh.
/// After merging it calculates the Euler characteristic of the merged mesh.
/// </summary>
private int CalculateEulerCharacteristic()
{
int noVertices = 0;
int noHoles = 0; // Stays zero if mesh is triangular
int noFaces;
HashSet <IndexSegment> edges = new HashSet <IndexSegment>(new SegmentComparer(true /*compareBothDirections*/));
if (m_MergedFaceSet.Count != 0)
{
// Merging already occurred, calculate new Euler characteristic
noFaces = m_MergedFaceSet.Count;
foreach (int mergedFace in m_MergedFaceSet)
{
m_FacesCollDict[mergedFace].OuterAndInnerBoundaries.ToList().ForEach(vp => edges.Add(vp.Value));
if (m_FacesCollDict[mergedFace].IndexedInnerBoundaries != null)
{
noHoles += m_FacesCollDict[mergedFace].IndexedInnerBoundaries.Count;
}
}
noVertices = m_MeshVertices.Count; // m_MeshVertices doesn't contain isolated vertices
}
else
{
if (IsMesh)
{
noVertices = m_MeshGeom.Vertices.Count;
noFaces = m_MeshGeom.NumTriangles;
for (int faceIdx = 0; faceIdx < noFaces; faceIdx++)
{
MeshTriangle tri = m_MeshGeom.get_Triangle(faceIdx);
edges.Add(new IndexSegment((int)tri.get_Index(0), (int)tri.get_Index(1)));
edges.Add(new IndexSegment((int)tri.get_Index(1), (int)tri.get_Index(2)));
edges.Add(new IndexSegment((int)tri.get_Index(2), (int)tri.get_Index(0)));
}
}
else
{
noVertices = m_Geom.VertexCount;
noFaces = m_Geom.TriangleCount;
for (int faceIdx = 0; faceIdx < noFaces; faceIdx++)
{
TriangleInShellComponent tri = m_Geom.GetTriangle(faceIdx);
edges.Add(new IndexSegment(tri.VertexIndex0, tri.VertexIndex1));
edges.Add(new IndexSegment(tri.VertexIndex1, tri.VertexIndex2));
edges.Add(new IndexSegment(tri.VertexIndex2, tri.VertexIndex0));
}
}
}
// V - E + F - I
return(noVertices - edges.Count + noFaces - noHoles);
}
public static List <LMAStudio.StreamVR.Common.Models.Face> ConvertToDTO(Autodesk.Revit.DB.Element parent, Autodesk.Revit.DB.Solid geometry)
{
List <LMAStudio.StreamVR.Common.Models.Face> wallFaces = new List <LMAStudio.StreamVR.Common.Models.Face>();
IEnumerable <Face> faces = geometry.Faces.Cast <Face>();
Face topFace = faces.Where(
(f, i) => i == 1
).FirstOrDefault() ?? faces.FirstOrDefault();
wallFaces = faces.Select((f, index) =>
{
Mesh m = f.Triangulate();
List <int> indices = new List <int>();
for (int i = 0; i < m.NumTriangles; i++)
{
MeshTriangle mt = m.get_Triangle(i);
for (int j = 0; j < 3; j++)
{
indices.Add((int)mt.get_Index(j));
}
}
return(new LMAStudio.StreamVR.Common.Models.Face
{
ElementId = parent.Id.ToString(),
FaceIndex = index,
MaterialId = f.MaterialElementId?.ToString(),
Indices = indices,
Vertices = m.Vertices.Select(v => new LMAStudio.StreamVR.Common.Models.XYZ
{
X = v.X,
Y = v.Y,
Z = v.Z,
}).ToList()
});
}).ToList();
return(wallFaces);
}
/// <summary>
/// Function called before and after triangle merging.
/// Before merging it calculates the Euler characteristic of the original mesh.
/// After merging it calculates the Euler characteristic of the merged mesh.
/// </summary>
private int CalculateEulerCharacteristic()
{
int noVertices = (IsMesh) ? _meshGeom.Vertices.Count : _geom.VertexCount;
int noHoles = 0; // Stays zero if mesh is triangular
int noFaces;
HashSet <IndexSegment> edges = new HashSet <IndexSegment>(new SegmentComparer(true /*compareBothDirections*/));
if (_mergedFaceList.Count != 0)
{
// Merging already occurred, calculate new Euler characteristic
noFaces = _mergedFaceList.Count;
foreach (int mergedFace in _mergedFaceList)
{
edges.UnionWith(facesColl[mergedFace].outerAndInnerBoundaries);
if (facesColl[mergedFace].indexedInnerBoundaries != null)
{
noHoles += facesColl[mergedFace].indexedInnerBoundaries.Count;
}
}
}
else
{
if (IsMesh)
{
noFaces = _meshGeom.NumTriangles;
for (int faceIdx = 0; faceIdx < noFaces; faceIdx++)
{
MeshTriangle tri = _meshGeom.get_Triangle(faceIdx);
edges.Add(new IndexSegment((int)tri.get_Index(0), (int)tri.get_Index(1)));
edges.Add(new IndexSegment((int)tri.get_Index(1), (int)tri.get_Index(2)));
edges.Add(new IndexSegment((int)tri.get_Index(2), (int)tri.get_Index(0)));
}
}
else
{
noFaces = _geom.TriangleCount;
for (int faceIdx = 0; faceIdx < noFaces; faceIdx++)
{
TriangleInShellComponent tri = _geom.GetTriangle(faceIdx);
edges.Add(new IndexSegment(tri.VertexIndex0, tri.VertexIndex1));
edges.Add(new IndexSegment(tri.VertexIndex1, tri.VertexIndex2));
edges.Add(new IndexSegment(tri.VertexIndex2, tri.VertexIndex0));
}
}
}
// V - E + F - I
return(noVertices - edges.Count + noFaces - noHoles);
}
public Result Execute(
ExternalCommandData commandData,
ref string message,
ElementSet elements)
{
UIApplication uiapp = commandData.Application;
UIDocument uidoc = uiapp.ActiveUIDocument;
Document doc = uidoc.Document;
Selection sel = uidoc.Selection;
ICollection <ElementId> ids = sel.GetElementIds();
if (1 != ids.Count)
{
message = "Please select an element to export to TWGL.";
return(Result.Failed);
}
Element e = null;
foreach (ElementId id in ids)
{
e = doc.GetElement(id);
}
// Determine bounding box in order to translate
// all coordinates to bounding box midpoint.
BoundingBoxXYZ bb = e.get_BoundingBox(null);
XYZ pmin = bb.Min;
XYZ pmax = bb.Max;
XYZ vsize = pmax - pmin;
XYZ pmid = pmin + 0.5 * vsize;
Options opt = new Options();
GeometryElement geo = e.get_Geometry(opt);
List <int> faceIndices = new List <int>();
List <int> faceVertices = new List <int>();
List <double> faceNormals = new List <double>();
int[] triangleIndices = new int[3];
XYZ[] triangleCorners = new XYZ[3];
foreach (GeometryObject obj in geo)
{
Solid solid = obj as Solid;
if (solid != null && 0 < solid.Faces.Size)
{
faceIndices.Clear();
faceVertices.Clear();
faceNormals.Clear();
foreach (Face face in solid.Faces)
{
Mesh mesh = face.Triangulate();
int nTriangles = mesh.NumTriangles;
IList <XYZ> vertices = mesh.Vertices;
int nVertices = vertices.Count;
List <int> vertexCoordsMm = new List <int>(3 * nVertices);
// A vertex may be reused several times with
// different normals for different faces, so
// we cannot precalculate normals per vertex.
//List<double> normals = new List<double>( 3 * nVertices );
foreach (XYZ v in vertices)
{
// Translate the entire element geometry
// to the bounding box midpoint and scale
// to metric millimetres.
XYZ p = v - pmid;
vertexCoordsMm.Add(Util.FootToMm(p.X));
vertexCoordsMm.Add(Util.FootToMm(p.Y));
vertexCoordsMm.Add(Util.FootToMm(p.Z));
}
for (int i = 0; i < nTriangles; ++i)
{
MeshTriangle triangle = mesh.get_Triangle(i);
for (int j = 0; j < 3; ++j)
{
int k = (int)triangle.get_Index(j);
triangleIndices[j] = k;
triangleCorners[j] = vertices[k];
}
// Calculate constant triangle facet normal.
XYZ v = triangleCorners[1]
- triangleCorners[0];
XYZ w = triangleCorners[2]
- triangleCorners[0];
XYZ triangleNormal = v
.CrossProduct(w)
.Normalize();
for (int j = 0; j < 3; ++j)
{
int nFaceVertices = faceVertices.Count;
Debug.Assert(nFaceVertices.Equals(faceNormals.Count),
"expected equal number of face vertex and normal coordinates");
faceIndices.Add(nFaceVertices / 3);
int i3 = triangleIndices[j] * 3;
// Rotate the X, Y and Z directions,
// since the Z direction points upward
// in Revit as opposed to sideways or
// outwards or forwards in WebGL.
faceVertices.Add(vertexCoordsMm[i3 + 1]);
faceVertices.Add(vertexCoordsMm[i3 + 2]);
faceVertices.Add(vertexCoordsMm[i3]);
if (RetainCurvedSurfaceFacets)
{
faceNormals.Add(triangleNormal.Y);
faceNormals.Add(triangleNormal.Z);
faceNormals.Add(triangleNormal.X);
}
else
{
UV uv = face.Project(
triangleCorners[j]).UVPoint;
XYZ normal = face.ComputeNormal(uv);
faceNormals.Add(normal.Y);
faceNormals.Add(normal.Z);
faceNormals.Add(normal.X);
}
}
}
}
// Scale the vertices to a [-1,1] cube
// centered around the origin. Translation
// to the origin was already performed above.
double scale = 2.0 / Util.FootToMm(
Util.MaxCoord(vsize));
string json_geometry_data
= GetJsonGeometryData(scale, faceIndices,
faceVertices, faceNormals);
DisplayWgl(json_geometry_data);
// Ignore other solids in this element.
// Please use the custom exporter for
// more complex element geometry.
break;
}
}
return(Result.Succeeded);
}
/// <summary>
/// Combine coplanar triangles from the faceted body if they share the edge. From this process, polygonal faces (with or without holes) will be created
/// </summary>
public void SimplifyAndMergeFaces(bool ignoreMerge = false)
{
int eulerBefore = ignoreMerge ? 0 : CalculateEulerCharacteristic();
int noTriangle = GetTriangleCount();
IEqualityComparer <XYZ> normalComparer = new VectorCompare();
Dictionary <XYZ, List <int> > faceSortedByNormal = new Dictionary <XYZ, List <int> >(normalComparer);
for (int ef = 0; ef < noTriangle; ++ef)
{
IList <int> vertIndex = new List <int>();
if (IsMesh)
{
MeshTriangle f = m_MeshGeom.get_Triangle(ef);
vertIndex = new List <int>(3)
{
(int)f.get_Index(0), (int)f.get_Index(1), (int)f.get_Index(2)
};
}
else
{
TriangleInShellComponent f = m_Geom.GetTriangle(ef);
vertIndex = new List <int>(3)
{
f.VertexIndex0, f.VertexIndex1, f.VertexIndex2
};
}
IndexFace intF = new IndexFace(vertIndex, ref m_MeshVertices);
m_FacesCollDict.Add(faceIdxOffset++, intF); // Keep faces in a dictionary and assigns ID
List <int> fIDList;
if (!faceSortedByNormal.TryGetValue(intF.Normal, out fIDList))
{
fIDList = new List <int>(1)
{
ef
};
faceSortedByNormal.Add(intF.Normal, fIDList);
}
else if (!fIDList.Contains(ef))
{
fIDList.Add(ef);
}
}
foreach (KeyValuePair <XYZ, List <int> > fListDict in faceSortedByNormal)
{
List <int> mergedFaceList = null;
if (fListDict.Value.Count > 1)
{
if (!ignoreMerge)
{
TryMergeFaces(fListDict.Value, out mergedFaceList);
}
else
{
// keep original face list
mergedFaceList = fListDict.Value;
}
if (mergedFaceList != null && mergedFaceList.Count > 0)
{
// insert only new face indexes as the mergedlist from different vertices can be duplicated
foreach (int fIdx in mergedFaceList)
{
if (!m_MergedFaceSet.Contains(fIdx))
{
m_MergedFaceSet.Add(fIdx);
}
}
}
}
else if (!m_MergedFaceSet.Contains(fListDict.Value[0]))
{
m_MergedFaceSet.Add(fListDict.Value[0]); // No pair face, add it into the mergedList
}
}
// Remove unused vertices
CleanVerticesAndUpdateIndexes();
int eulerAfter = ignoreMerge ? 0 : CalculateEulerCharacteristic();
if (eulerBefore != eulerAfter)
{
throw new InvalidOperationException(); // Coplanar merge broke the mesh in some way, so we need to fall back to exporting a triangular mesh
}
}
/// <summary>
/// Combine coplanar triangles from the faceted body if they share the edge. From this process, polygonal faces (with or without holes) will be created
/// </summary>
public void SimplifyAndMergeFaces()
{
int noTriangle = (IsMesh)? _meshGeom.NumTriangles : _geom.TriangleCount;
int noVertices = (IsMesh)? _meshGeom.Vertices.Count : _geom.VertexCount;
IEqualityComparer <XYZ> normalComparer = new vectorCompare();
Dictionary <XYZ, List <int> > faceSortedByNormal = new Dictionary <XYZ, List <int> >(normalComparer);
for (int ef = 0; ef < noTriangle; ++ef)
{
IList <int> vertIndex = new List <int>();
if (IsMesh)
{
MeshTriangle f = _meshGeom.get_Triangle(ef);
vertIndex.Add((int)f.get_Index(0));
vertIndex.Add((int)f.get_Index(1));
vertIndex.Add((int)f.get_Index(2));
}
else
{
TriangleInShellComponent f = _geom.GetTriangle(ef);
vertIndex.Add(f.VertexIndex0);
vertIndex.Add(f.VertexIndex1);
vertIndex.Add(f.VertexIndex2);
}
IndexFace intF = new IndexFace(vertIndex);
facesColl.Add(ef, intF); // Keep faces in a dictionary and assigns ID
List <int> fIDList;
if (!faceSortedByNormal.TryGetValue(intF.normal, out fIDList))
{
fIDList = new List <int>();
fIDList.Add(ef);
faceSortedByNormal.Add(intF.normal, fIDList);
}
else
{
if (!fIDList.Contains(ef))
{
fIDList.Add(ef);
}
}
}
foreach (KeyValuePair <XYZ, List <int> > fListDict in faceSortedByNormal)
{
List <int> mergedFaceList = null;
if (fListDict.Value.Count > 1)
{
TryMergeFaces(fListDict.Value, out mergedFaceList);
if (mergedFaceList != null && mergedFaceList.Count > 0)
{
// insert only new face indexes as the mergedlist from different vertices can be duplicated
foreach (int fIdx in mergedFaceList)
{
if (!_mergedFaceList.Contains(fIdx))
{
_mergedFaceList.Add(fIdx);
}
}
}
}
else if (!_mergedFaceList.Contains(fListDict.Value[0]))
{
_mergedFaceList.Add(fListDict.Value[0]); // No pair face, add it into the mergedList
}
}
}
private byte[] GeometryToOBJ(Document doc, GeometryElement geometry)
{
int indexOffset = 0;
int nextIndexOffset = 0;
int part = 0;
StringBuilder fullObjectSB = new StringBuilder();
fullObjectSB.Append($"o StreamVRExportedObject\n");
foreach (GeometryObject obj in geometry)
{
Solid solid = obj as Solid;
if (solid == null)
{
continue;
}
if (solid.GraphicsStyleId != null)
{
GraphicsStyle gs = doc.GetElement(solid.GraphicsStyleId) as GraphicsStyle;
bool isLightSource = gs?.GraphicsStyleCategory?.Name == "Light Source";
if (isLightSource)
{
XYZ centroid = solid.GetBoundingBox()?.Transform?.Origin;
if (centroid != null)
{
fullObjectSB.Append($"ls {centroid.X} {centroid.Z} {centroid.Y}\n");
}
continue;
}
}
fullObjectSB.Append($"g GeometryPart{part}\n");
bool addedMaterial = false;
IEnumerable <Face> faces = solid.Faces.Cast <Face>();
foreach (Face f in faces)
{
if (!addedMaterial && f.MaterialElementId != null)
{
fullObjectSB.Append($"svrm {f.MaterialElementId.ToString()}\n");
addedMaterial = true;
}
Mesh m = f.Triangulate();
foreach (XYZ v in m.Vertices)
{
fullObjectSB.Append($"v {v.X} {v.Z} {v.Y}\n");
}
for (int i = 0; i < m.NumTriangles; i++)
{
MeshTriangle mt = m.get_Triangle(i);
int f1 = (int)mt.get_Index(0) + indexOffset;
int f2 = (int)mt.get_Index(1) + indexOffset;
int f3 = (int)mt.get_Index(2) + indexOffset;
fullObjectSB.Append($"f {f1 + 1} {f2 + 1} {f3 + 1}\n");
if (f1 > nextIndexOffset)
{
nextIndexOffset = f1;
}
if (f2 > nextIndexOffset)
{
nextIndexOffset = f2;
}
if (f3 > nextIndexOffset)
{
nextIndexOffset = f3;
}
}
indexOffset = nextIndexOffset + 1;
}
part++;
}
byte[] file_bytes = Encoding.ASCII.GetBytes(fullObjectSB.ToString());
return(file_bytes);
}
private bool GetFaceGeometry(Face face, out List <int> faceIndices, out List <int> faceVertices, out List <double> faceNormals, out XYZ centerPoint)
{
bool result = false;
faceIndices = new List <int>();
faceVertices = new List <int>();
faceNormals = new List <double>();
centerPoint = new XYZ();
try
{
BoundingBoxUV bb = face.GetBoundingBox();
UV midUV = new UV((bb.Max.U - bb.Min.U) / 2, (bb.Max.V - bb.Min.V) / 2);
centerPoint = face.Evaluate(midUV);
Mesh mesh = m_face.Triangulate();
int nTriangles = mesh.NumTriangles;
IList <XYZ> vertices = mesh.Vertices;
int nVertices = vertices.Count;
List <int> vertexCoordsMm = new List <int>(3 * nVertices);
foreach (XYZ v in vertices)
{
vertexCoordsMm.Add(ConverterUtil.FootToMm(v.X));
vertexCoordsMm.Add(ConverterUtil.FootToMm(v.Y));
vertexCoordsMm.Add(ConverterUtil.FootToMm(v.Z));
}
int[] triangleIndices = new int[3];
XYZ[] triangleCorners = new XYZ[3];
for (int i = 0; i < nTriangles; ++i)
{
faceIndices.Add(2); //triangle with material
MeshTriangle triangle = mesh.get_Triangle(i);
for (int j = 0; j < 3; ++j)
{
int k = (int)triangle.get_Index(j);
triangleIndices[j] = k;
triangleCorners[j] = vertices[k];
}
// Calculate constant triangle facet normal.
XYZ v = triangleCorners[1]
- triangleCorners[0];
XYZ w = triangleCorners[2]
- triangleCorners[0];
XYZ triangleNormal = v
.CrossProduct(w)
.Normalize();
for (int j = 0; j < 3; ++j)
{
int nFaceVertices = faceVertices.Count;
faceIndices.Add(nFaceVertices / 3);
int i3 = triangleIndices[j] * 3;
// Rotate the X, Y and Z directions,
// since the Z direction points upward
// in Revit as opposed to sideways or
// outwards or forwards in WebGL.
faceVertices.Add(vertexCoordsMm[i3 + 1]);
faceVertices.Add(vertexCoordsMm[i3 + 2]);
faceVertices.Add(vertexCoordsMm[i3]);
UV uv = m_face.Project(
triangleCorners[j]).UVPoint;
XYZ normal = m_face.ComputeNormal(uv);
faceNormals.Add(normal.Y);
faceNormals.Add(normal.Z);
faceNormals.Add(normal.X);
}
faceIndices.Add(0);
}
result = true;
}
catch (Exception ex)
{
string message = "Cannot get face geometry: " + ex.Message;
}
return(result);
}
static private bool ExportFaces(List <Face> faces, ref Va3cContainer.Va3cGeometry faceGroupGeometry, out bool bHasUvs)
{
bHasUvs = true;
foreach (Face face in faces)
{
Mesh mesh = face.Triangulate(ExportEventHandler.Settings.TriangulateDetailLevel);
Surface surface = face.GetSurface();
if (mesh == null || surface == null)
{
continue;
}
int currentPointNum = faceGroupGeometry.data.points;
int currentTriNum = faceGroupGeometry.data.triangles;
IList <XYZ> points = mesh.Vertices;
int pointNum = points.Count;
int triNum = mesh.NumTriangles;
faceGroupGeometry.data.points += pointNum;
faceGroupGeometry.data.triangles += triNum;
foreach (XYZ point in points)
{
faceGroupGeometry.data.vertices.Add((float)point.X);
faceGroupGeometry.data.vertices.Add((float)point.Y);
faceGroupGeometry.data.vertices.Add((float)point.Z);
try
{
if (bHasUvs)
{
UV uv;
double distance;
surface.Project(point, out uv, out distance);
faceGroupGeometry.data.uvs.Add((float)uv.U);
faceGroupGeometry.data.uvs.Add((float)uv.V);
XYZ normal = face.ComputeNormal(uv);
faceGroupGeometry.data.normals.Add((float)normal.X);
faceGroupGeometry.data.normals.Add((float)normal.Y);
faceGroupGeometry.data.normals.Add((float)normal.Z);
}
else
{
faceGroupGeometry.data.uvs.Add(0.0f);
faceGroupGeometry.data.uvs.Add(0.0f);
faceGroupGeometry.data.normals.Add(0.0f);
faceGroupGeometry.data.normals.Add(0.0f);
faceGroupGeometry.data.normals.Add(1.0f);
}
}
catch (System.Exception ex)
{
bHasUvs = false;
faceGroupGeometry.data.uvs.Add(0.0f);
faceGroupGeometry.data.uvs.Add(0.0f);
faceGroupGeometry.data.normals.Add(0.0f);
faceGroupGeometry.data.normals.Add(0.0f);
faceGroupGeometry.data.normals.Add(1.0f);
}
}
for (int i = 0; i < triNum; ++i)
{
MeshTriangle meshTri = mesh.get_Triangle(i);
int index0 = (int)meshTri.get_Index(0) + currentPointNum;
int index1 = (int)meshTri.get_Index(1) + currentPointNum;
int index2 = (int)meshTri.get_Index(2) + currentPointNum;
faceGroupGeometry.data.indices.Add(index0);
faceGroupGeometry.data.indices.Add(index1);
faceGroupGeometry.data.indices.Add(index2);
}
}
if (faceGroupGeometry.data.points > 0 && faceGroupGeometry.data.triangles > 0)
{
return(true);
}
return(false);
}
// Create and populate a pair of vertex and index buffers. Also update parameters associated with the format of the vertices.
private void ProcessFaces(RenderingPassBufferStorage bufferStorage)
{
List <MeshInfo> meshes = bufferStorage.Meshes;
if (meshes.Count == 0)
{
return;
}
List <int> numVerticesInMeshesBefore = new List <int>();
bool useNormals = this.Inputs.EnableFaceNormal;
// Vertex attributes are stored sequentially in vertex buffers. The attributes can include position, normal vector, and color.
// All vertices within a vertex buffer must have the same format. Possible formats are enumerated by VertexFormatBits.
// Vertex format also determines the type of rendering effect that can be used with the vertex buffer. In this sample,
// the color is always encoded in the vertex attributes.
bufferStorage.FormatBits = useNormals ? VertexFormatBits.PositionNormalColored : VertexFormatBits.PositionColored;
// The format of the vertices determines the size of the vertex buffer.
int vertexBufferSizeInFloats = (useNormals ? VertexPositionNormalColored.GetSizeInFloats() : VertexPositionColored.GetSizeInFloats()) *
bufferStorage.VertexBufferCount;
numVerticesInMeshesBefore.Add(0);
bufferStorage.VertexBuffer = new VertexBuffer(vertexBufferSizeInFloats);
bufferStorage.VertexBuffer.Map(vertexBufferSizeInFloats);
int numMeshes = meshes.Count;
if (useNormals)
{
// A VertexStream is used to write data into a VertexBuffer.
VertexStreamPositionNormalColored vertexStream = bufferStorage.VertexBuffer.GetVertexStreamPositionNormalColored();
for (int i = 0; i < numMeshes; i++)
{
var meshInfo = meshes[i];
Mesh mesh = meshInfo.Mesh;
foreach (XYZ vertex in mesh.Vertices)
{
vertexStream.AddVertex(new VertexPositionNormalColored(vertex + meshInfo.Offset, meshInfo.Normal, meshInfo.ColorWithTransparency));
}
numVerticesInMeshesBefore.Add(numVerticesInMeshesBefore.Last() + mesh.Vertices.Count);
}
}
else
{
// A VertexStream is used to write data into a VertexBuffer.
VertexStreamPositionColored vertexStream = bufferStorage.VertexBuffer.GetVertexStreamPositionColored();
for (int i = 0; i < numMeshes; i++)
{
var meshInfo = meshes[i];
Mesh mesh = meshInfo.Mesh;
// make the color of all faces white in HLR
ColorWithTransparency color = meshInfo.ColorWithTransparency;
foreach (XYZ vertex in mesh.Vertices)
{
vertexStream.AddVertex(new VertexPositionColored(vertex + meshInfo.Offset, color));
}
numVerticesInMeshesBefore.Add(numVerticesInMeshesBefore.Last() + mesh.Vertices.Count);
}
}
bufferStorage.VertexBuffer.Unmap();
// Primitives are specified using a pair of vertex and index buffers. An index buffer contains a sequence of indices into
// the associated vertex buffer, each index referencing a particular vertex.
int meshNumber = 0;
bufferStorage.IndexBufferCount = bufferStorage.PrimitiveCount * IndexTriangle.GetSizeInShortInts();
int indexBufferSizeInShortInts = 1 * bufferStorage.IndexBufferCount;
bufferStorage.IndexBuffer = new IndexBuffer(indexBufferSizeInShortInts);
bufferStorage.IndexBuffer.Map(indexBufferSizeInShortInts);
{
// An IndexStream is used to write data into an IndexBuffer.
IndexStreamTriangle indexStream = bufferStorage.IndexBuffer.GetIndexStreamTriangle();
foreach (MeshInfo meshInfo in meshes)
{
Mesh mesh = meshInfo.Mesh;
int startIndex = numVerticesInMeshesBefore[meshNumber];
for (int i = 0; i < mesh.NumTriangles; i++)
{
MeshTriangle mt = mesh.get_Triangle(i);
// Add three indices that define a triangle.
indexStream.AddTriangle(new IndexTriangle((int)(startIndex + mt.get_Index(0)),
(int)(startIndex + mt.get_Index(1)),
(int)(startIndex + mt.get_Index(2))));
}
meshNumber++;
}
}
bufferStorage.IndexBuffer.Unmap();
// VertexFormat is a specification of the data that is associated with a vertex (e.g., position).
bufferStorage.VertexFormat = new VertexFormat(bufferStorage.FormatBits);
// Effect instance is a specification of the appearance of geometry. For example, it may be used to specify color, if there is no color information provided with the vertices.
bufferStorage.EffectInstance = new EffectInstance(bufferStorage.FormatBits);
}
int getGeometry(Element e)
{
bool RetainCurvedSurfaceFacets = true;
Options opt = new Options();
GeometryElement geo = e.get_Geometry(opt);
if (geo == null)
{
return(0);
}
List <int> faceIndices = new List <int>();
List <double> faceVertices = new List <double>();
List <double> faceNormals = new List <double>();
int[] triangleIndices = new int[3];
XYZ[] triangleCorners = new XYZ[3];
foreach (GeometryObject obj in geo)
{
Solid solid = obj as Solid;
if (solid != null && 0 < solid.Faces.Size)
{
faceIndices.Clear();
faceVertices.Clear();
faceNormals.Clear();
foreach (Face face in solid.Faces)
{
Mesh mesh = face.Triangulate();
int nTriangles = mesh.NumTriangles;
IList <XYZ> vertices = mesh.Vertices;
int nVertices = vertices.Count;
List <double> vertexCoordsMm = new List <double>(3 * nVertices);
// A vertex may be reused several times with
// different normals for different faces, so
// we cannot precalculate normals per vertex.
//List<double> normals = new List<double>( 3 * nVertices );
foreach (XYZ v in vertices)
{
// Translate the entire element geometry
// to the bounding box midpoint and scale
// to metric millimetres.
XYZ p = v;
vertexCoordsMm.Add(p.X * _footToMm);
vertexCoordsMm.Add(p.Y * _footToMm);
vertexCoordsMm.Add(p.Z * _footToMm);
}
for (int i = 0; i < nTriangles; ++i)
{
MeshTriangle triangle = mesh.get_Triangle(i);
for (int j = 0; j < 3; ++j)
{
int k = (int)triangle.get_Index(j);
triangleIndices[j] = k;
triangleCorners[j] = vertices[k];
}
// Calculate constant triangle facet normal.
XYZ v = triangleCorners[1]
- triangleCorners[0];
XYZ w = triangleCorners[2]
- triangleCorners[0];
XYZ triangleNormal = v
.CrossProduct(w)
.Normalize();
for (int j = 0; j < 3; ++j)
{
int nFaceVertices = faceVertices.Count;
//Debug.Assert(nFaceVertices.Equals(faceNormals.Count),
// "expected equal number of face vertex and normal coordinates");
faceIndices.Add(nFaceVertices / 3);
int i3 = triangleIndices[j] * 3;
// Rotate the X, Y and Z directions,
// since the Z direction points upward
// in Revit as opposed to sideways or
// outwards or forwards in WebGL.
faceVertices.Add(vertexCoordsMm[i3 + 1]);
faceVertices.Add(vertexCoordsMm[i3 + 2]);
faceVertices.Add(vertexCoordsMm[i3]);
if (RetainCurvedSurfaceFacets)
{
faceNormals.Add(triangleNormal.Y);
faceNormals.Add(triangleNormal.Z);
faceNormals.Add(triangleNormal.X);
}
else
{
UV uv = face.Project(
triangleCorners[j]).UVPoint;
XYZ normal = face.ComputeNormal(uv);
faceNormals.Add(normal.Y);
faceNormals.Add(normal.Z);
faceNormals.Add(normal.X);
}
}
}
}
// Scale the vertices to a [-1,1] cube
// centered around the origin. Translation
// to the origin was already performed above.
//double scale = 2.0 / FootToMm(MaxCoord(vsize));
//Debug.Print("position: [{0}],",
// string.Join(", ",
// faceVertices.ConvertAll<string>(
// i => (i * scale).ToString("0.##"))));
//Debug.Print("normal: [{0}],",
// string.Join(", ",
// faceNormals.ConvertAll<string>(
// f => f.ToString("0.##"))));
//Debug.Print("indices: [{0}],",
// string.Join(", ",
// faceIndices.ConvertAll<string>(
// i => i.ToString())));
}
}
return(faceIndices.Count);
}
public static string GetFacesAndEdges(Element e, bool startFromZero)
{
String xx = "";
bool RetainCurvedSurfaceFacets = true;
// Get element geometry
Options opt = new Options();
GeometryElement geomElem = e.get_Geometry(opt);
int[] triangleIndices = new int[3];
XYZ[] triangleCorners = new XYZ[3];
List <string> faceVertices = new List <string>();
List <string> faceNormals = new List <string>();
List <string> faceElements = new List <string>();
//// First we need to get transformation
//LocationCurve lc = e.Location as LocationCurve;
//// Get curve starting- and endpoint
//XYZ startingPoint = lc.Curve.GetEndPoint(0);
//XYZ endPoint = lc.Curve.GetEndPoint(1);
foreach (GeometryObject geomObj in geomElem)
{
Solid geomSolid = geomObj as Solid;
if (null != geomSolid)
{
faceVertices.Clear();
faceNormals.Clear();
faceElements.Clear();
foreach (Face face in geomSolid.Faces)
{
// Triangulate face to get mesh
Mesh mesh = face.Triangulate();
int nTriangles = mesh.NumTriangles;
IList <XYZ> vertices = mesh.Vertices;
int nVertices = vertices.Count;
List <int> vertexCoordsMm = new List <int>(3 * nVertices);
// A vertex may be reused several times with
// different normals for different faces, so
// we cannot precalculate normals per vertex.
// List<double> normals = new List<double>( 3 * nVertices );
// Extract vertices
foreach (XYZ v in vertices)
{
vertexCoordsMm.Add(ConvertLengthToMM(v.X));
vertexCoordsMm.Add(ConvertLengthToMM(v.Y));
vertexCoordsMm.Add(ConvertLengthToMM(v.Z));
}
// Loop over triangles
for (int i = 0; i < nTriangles; ++i)
{
MeshTriangle triangle = mesh.get_Triangle(i);
for (int j = 0; j < 3; ++j)
{
int k = (int)triangle.get_Index(j);
triangleIndices[j] = k;
triangleCorners[j] = vertices[k];
}
// Calculate constant triangle facet normal.
XYZ v = triangleCorners[1]
- triangleCorners[0];
XYZ w = triangleCorners[2]
- triangleCorners[0];
XYZ triangleNormal = v
.CrossProduct(w)
.Normalize();
// List to store vertice indexes in the form: [v1//vn1 v2//vn2 v3//vn3]
List <string> vertIndexes = new List <string>();
for (int j = 0; j < 3; ++j)
{
int nFaceVertices = faceVertices.Count;
//if(nFaceVertices != faceNormals.Count)
//{
// xx += "expected equal number of face vertex and normal coordinates\n";
//}
int i3 = triangleIndices[j] * 3;
// Rotate the X, Y and Z directions,
// since the Z direction points upward
// in Revit as opposed to sideways or
// outwards or forwards in WebGL.
string vStr = $"v {vertexCoordsMm[i3]} {vertexCoordsMm[i3 + 1]} {vertexCoordsMm[i3 + 2]}";
// get vertice index
int vidx = faceVertices.IndexOf(vStr);
// add if not exist
if (vidx == -1)
{
faceVertices.Add(vStr);
vidx = faceVertices.Count - 1;
}
string vnStr = "";
if (RetainCurvedSurfaceFacets)
{
vnStr = $"vn {Math.Round(triangleNormal.X, 2)} {Math.Round(triangleNormal.Y, 2)} {Math.Round(triangleNormal.Z, 2)}";
}
else
{
UV uv = face.Project(
triangleCorners[j]).UVPoint;
XYZ normal = face.ComputeNormal(uv);
vnStr = $"vn {Math.Round(normal.X, 2)} {Math.Round(normal.Y, 2)} {Math.Round(normal.Z, 2)}";
}
// get face normal index
int vnidx = faceNormals.IndexOf(vnStr);
// add if not in list
if (vnidx == -1)
{
faceNormals.Add(vnStr);
vnidx = faceNormals.Count - 1;
}
// add indexes to list
vertIndexes.Add($"{vidx+1+objStartIndex}/{vnidx+1 + objStartNormal}");
}
// Store face elements
string fStr = $"f {vertIndexes[0]} {vertIndexes[1]} {vertIndexes[2]}";
faceElements.Add(fStr);
}
}
// Write to string
xx += String.Join("\n\t", faceVertices) + "\n\t";
xx += String.Join("\n\t", faceNormals) + "\n\t";
xx += String.Join("\n\t", faceElements) + "\n\t";
if (!startFromZero)
{
objStartIndex += faceVertices.Count;
objStartNormal += faceNormals.Count;
}
}
Mesh geomMesh = geomObj as Mesh;
Curve geomCurve = geomObj as Curve;
Point geomPoint = geomObj as Point;
PolyLine geomPoly = geomObj as PolyLine;
GeometryInstance geomInst = geomObj as GeometryInstance;
if (null != geomInst)
{
GeometryElement geomElement = geomInst.GetInstanceGeometry();
foreach (GeometryObject geomObj1 in geomElement)
{
Solid geomSolid1 = geomObj1 as Solid;
if (null != geomSolid1)
{
Console.Out.WriteLine("got element: " + geomSolid1.Faces);
}
}
}
}
return(xx);
}
private void ExportSolid2(Solid solid)
{
foreach (Face face in solid.Faces)
{
if (!(face.Equals(null)))
{
Mesh mesh = face.Triangulate(userSetting.LevelOfDetail / 15.0);
if (!(mesh.Equals(null)) && !mesh.Visibility.Equals(Visibility.Invisible))
{
ModelGeometry exportedGeometry = new ModelGeometry();
// 设置坐标系
exportedGeometry.Transform = transformationStack.Peek();
exportedGeometry.Points = new List <XYZ>(mesh.Vertices);
exportedGeometry.Indices = new List <int>(mesh.NumTriangles * 3);
//指示此转换是否为保形的布尔值。指示此转换是否产生反射的布尔值。反射变换会更改坐标系的惯用性。
if (exportedGeometry.Transform.IsConformal && exportedGeometry.Transform.HasReflection)
{
for (int i = 0; i < mesh.NumTriangles; i++)
{
MeshTriangle meshTriangle = mesh.get_Triangle(i);
exportedGeometry.Indices.Add((int)meshTriangle.get_Index(0));
exportedGeometry.Indices.Add((int)meshTriangle.get_Index(2));
exportedGeometry.Indices.Add((int)meshTriangle.get_Index(1));
}
}
else
{
for (int j = 0; j < mesh.NumTriangles; j++)
{
MeshTriangle meshTriangle2 = mesh.get_Triangle(j);
exportedGeometry.Indices.Add((int)meshTriangle2.get_Index(0));
exportedGeometry.Indices.Add((int)meshTriangle2.get_Index(1));
exportedGeometry.Indices.Add((int)meshTriangle2.get_Index(2));
}
}
ModelGeometry TGeometry = exportedGeometry;
//计算模型法线
TGeometry.CalculateNormals(TGeometry.Transform.IsConformal && exportedGeometry.Transform.HasReflection);
exportedGeometry.CalculateUVs(true, false);
//判断是不是反正双面实体
if (face.IsTwoSided)
{
exportedGeometry.MakeDoubleSided();
}
//将当前元素面的材质ID放入元组中（文档，元素材质ID）
ElementId materialElementId = face.MaterialElementId;
Tuple <Document, ElementId> tuple = new Tuple <Document, ElementId>(documentStack.Peek(), materialElementId);
//加入元组索引
ChangeCurrentMaterial(tuple);
//用元组索引将模型加入到模型数据池
documentAndMaterialIdToGeometries[tuple].Add(exportedGeometry);
}
}
}
}