private void CreateFaceModels(IFCItem item, Vector3D center)
{
while (item != null)
{
if (item.ifcID != IntPtr.Zero && item.noVerticesForFaces != 0 && item.noPrimitivesForFaces != 0)
{
var positions = new List<Vector3>();
var normals = new List<Vector3>();
if (item.verticesForFaces != null)
{
for (int i = 0; i < item.noVerticesForFaces; i++)
{
var point = new Point3D(item.verticesForFaces[6 * i + 0] - center.X, item.verticesForFaces[6 * i + 1] - center.Y, item.verticesForFaces[6 * i + 2] - center.Z);
var normal = new Vector3D(item.verticesForFaces[6 * i + 3], item.verticesForFaces[6 * i + 4], item.verticesForFaces[6 * i + 5]);
positions.Add(new Vector3((float)point.X, (float)point.Y, (float)point.Z));
normals.Add(new Vector3((float)normal.X, (float)normal.Y, (float)normal.Z));
}
Debug.Assert(item.verticesForFaces.Length == item.noVerticesForFaces * 6);
}
var indices = new Int32Collection();
if (item.indicesForFaces != null)
{
for (int i = 0; i < 3 * item.noPrimitivesForFaces; i++)
{
indices.Add(item.indicesForFaces[i]);
}
}
List<Vector2> textureCoords = positions.Select(o => new Vector2(o.X, o.Y)).ToList();
var meshBuilder = new MeshBuilder();
meshBuilder.Append(positions, indices,normals,textureCoords);
MeshGeometryModel3D mesh = new MeshGeometryModel3D() { Geometry = meshBuilder.ToMeshGeometry3D() };
item.Mesh3d = mesh;
_meshToIfcItems[mesh] = item;
#if DEBUG
//OutputObj(item.ifcID.ToString(), mesh);
#endif
FillMeshByIfcColor(item);
model.Add(mesh);
}
CreateFaceModels(item.child, center);
item = item.next;
}
}
