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);
}
private void WriteFaceJson(Face face)
{
try
{
List <int> fIndices = new List <int>();
List <int> fVertices = new List <int>();
List <double> fNormals = new List <double>();
XYZ centerPoint = null;
if (GetFaceGeometry(face, out fIndices, out fVertices, out fNormals, out centerPoint))
{
Color randomColor = new Color((byte)random.Next(0, 255), (byte)random.Next(0, 255), (byte)random.Next(0, 255));
int colorVal = ConverterUtil.ColorToInt(randomColor);
JsonContainer.JsMaterial jsMaterial = new JsonContainer.JsMaterial();
jsMaterial.uuid = Guid.NewGuid().ToString();
jsMaterial.type = "MeshPhongMaterial";
jsMaterial.name = "AVF Material";
jsMaterial.color = colorVal;
jsMaterial.ambient = colorVal;
jsMaterial.emissive = 0;
jsMaterial.specular = colorVal;
jsMaterial.shininess = 1;
jsMaterial.opacity = 1;
jsMaterial.transparent = false;
jsMaterial.wireframe = false;
container.materials.Add(jsMaterial);
JsonContainer.JsGeometry jsGeometry = new JsonContainer.JsGeometry();
jsGeometry.uuid = Guid.NewGuid().ToString();
jsGeometry.type = "Geometry";
jsGeometry.data = new JsonContainer.JsGeometryData();
jsGeometry.data.faces = new List <int>();
jsGeometry.data.vertices = new List <int>();
jsGeometry.data.normals = new List <double>();
jsGeometry.data.uvs = new List <double>();
jsGeometry.data.visible = true;
jsGeometry.data.castShadow = true;
jsGeometry.data.receiveShadow = false;
jsGeometry.data.doubleSided = true;
jsGeometry.data.scale = 1;
jsGeometry.data.faces = fIndices;
jsGeometry.data.vertices = fVertices;
jsGeometry.data.normals = fNormals;
container.geometries.Add(jsGeometry);
JsonContainer.JsObject avfElement = new JsonContainer.JsObject();
avfElement.uuid = Guid.NewGuid().ToString();
avfElement.matrix = new double[] { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
avfElement.type = "RevitElement";
avfElement.material = jsMaterial.uuid;
avfElement.userData = new Dictionary <string, string>();
avfElement.userData.Add("AVFReference", refString);
avfElement.userData.Add("PointX", ConverterUtil.FootToMm(centerPoint.X).ToString());
avfElement.userData.Add("PointY", ConverterUtil.FootToMm(centerPoint.Y).ToString());
avfElement.userData.Add("PointZ", ConverterUtil.FootToMm(centerPoint.Z).ToString());
//avfElement.userData.Add("AnalysisValue", "");
avfElement.children = new List <JsonContainer.JsObject>();
JsonContainer.JsObject meshObj = new JsonContainer.JsObject();
meshObj.name = "AVF Mesh";
meshObj.geometry = jsGeometry.uuid;
meshObj.matrix = new double[] { 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 };
meshObj.type = "Mesh";
meshObj.uuid = Guid.NewGuid().ToString();
meshObj.material = jsMaterial.uuid;
avfElement.children.Add(meshObj);
container.obj.children.Add(avfElement);
}
}
catch (Exception ex)
{
string message = "Cannot write face data: " + ex.Message;
}
}