public void TriangulateFace(Autodesk.Revit.DB.Face vFace, Transform instTransform)
{
try
{
//setup utility class
LuxExporter.UnitConverter Converter = new UnitConverter();
//process face
Mesh vMesh = vFace.Triangulate();
//check if we have a quad mesh (4 edges to a face)
if (vMesh.Vertices.Count == 4)
{
//increase face counter
iNumberOfFaces++;
//found quad
Data.NumberOfVerticesinFace = 4;
//loop through all vertices and add
foreach (XYZ ii in vMesh.Vertices)
{
XYZ point = ii;
XYZ transformedPoint;
//transform geometry (only required in nested families / or elements like baluster
if (instTransform == null)
{
transformedPoint = point;
}
else
{
transformedPoint = instTransform.OfPoint(point);
}
//get the normal
XYZ NormalAtPoint;
IntersectionResult IntResult= vFace.Project(ii);
if (IntResult != null)
{
UV UVatPoint = IntResult.UVPoint;
NormalAtPoint = new XYZ(vFace.ComputeNormal(UVatPoint).X, vFace.ComputeNormal(UVatPoint).Y, vFace.ComputeNormal(UVatPoint).Z);
}
else
{
//this needs fixing!!!
NormalAtPoint = new XYZ(0, 0, 0);
}
//convert to meter
transformedPoint = Converter.ConvertPointCoordToMeter(transformedPoint);
//NormalAtPoint = Converter.ConvertPointCoordToMeter(NormalAtPoint);
//add to ply class
Data.AddVertice(transformedPoint,NormalAtPoint);
}
}
else
{
// set pointer
Data.NumberOfVerticesinFace = 3;
//export all triangles in face
for (int i = 0; i < vMesh.NumTriangles; i++)
{
//increase face counter
iNumberOfFaces++;
MeshTriangle objTriangular = vMesh.get_Triangle(i);
for (int iPointsCounter = 0; iPointsCounter < 3; iPointsCounter++)
{
XYZ point = objTriangular.get_Vertex(iPointsCounter);
XYZ transformedPoint;
//transform geometry (only required in nested families / or elements like baluster
if (instTransform == null)
{
transformedPoint = point;
}
else
{
transformedPoint = instTransform.OfPoint(point);
}
XYZ NormalAtPoint;
//get the normal
IntersectionResult IntResult = vFace.Project(point);
if (IntResult!=null)
{
UV UVatPoint = IntResult.UVPoint;
NormalAtPoint = new XYZ(vFace.ComputeNormal(UVatPoint).X,vFace.ComputeNormal(UVatPoint).Y,vFace.ComputeNormal(UVatPoint).Z);
}
else
{
//this needs fixing
NormalAtPoint = new XYZ(0, 0, 0);
}
//convert to meter
transformedPoint = Converter.ConvertPointCoordToMeter(transformedPoint);
//NormalAtPoint = Converter.ConvertPointCoordToMeter(NormalAtPoint);
//add to ply class
Data.AddVertice(transformedPoint,NormalAtPoint);
}
}
}
}
catch (Exception ex)
{
System.Windows.Forms.MessageBox.Show("Error in module PLY_by_material::TriangulateMesh "+ex.Message);
throw;
}
}
public static Surface ExtractSurface(Autodesk.Revit.DB.RevolvedFace face, IEnumerable<PolyCurve> edgeLoops)
{
var crv = face.Curve.ToProtoType(false);
var axis = face.Axis.ToVector(false);
var o = face.Origin.ToVector(false);
var x = face.get_Radius(0).ToVector(false);
var y = face.get_Radius(1).ToVector(false);
// Note: The profile curve is represented in the coordinate system of the revolve
// so we need to transform it into the global coordinate system
var revolveCs = CoordinateSystem.Identity();
var globalCs = CoordinateSystem.ByOriginVectors(o.AsPoint(), x, y);
var crvTrf = (Autodesk.DesignScript.Geometry.Curve)crv.Transform(revolveCs, globalCs);
var srf =
Surface.ByRevolve(crvTrf, o.AsPoint(), axis.Normalized(), 0, 360)
.FlipNormalDirection();
var ptOnSrf = srf.PointAtParameter(0.5, 0.5);
var projRes = face.Project(ptOnSrf.ToXyz());
if (projRes == null) return srf;
var uvOnFace = projRes.UVPoint;
var normOnFace = face.ComputeNormal(uvOnFace).ToVector();
var normOnSrf = srf.NormalAtParameter(0.5, 0.5);
// if the normal is reversed, reverse the surface
if (normOnFace.Dot(normOnSrf) < 0) return srf.FlipNormalDirection();
return srf;
}
