/// <summary>
/// Get two vectors, which indicate some edge direction which contain given point,
/// set the given point as the start point, the other end point of the edge as end
/// </summary>
/// <param name="point">a point of the swept profile</param>
/// <returns>two vectors indicate edge direction</returns>
protected List <Autodesk.Revit.DB.XYZ> GetRelatedVectors(Autodesk.Revit.DB.XYZ point)
{
// Initialize the return vector list.
List <Autodesk.Revit.DB.XYZ> vectors = new List <Autodesk.Revit.DB.XYZ>();
// Get all the edge which contain this point.
// And get the vector from this point to another point
foreach (Line line in m_edges)
{
if (GeomUtil.IsEqual(point, line.GetEndPoint(0)))
{
Autodesk.Revit.DB.XYZ vector = GeomUtil.SubXYZ(line.GetEndPoint(1), line.GetEndPoint(0));
vectors.Add(vector);
}
if (GeomUtil.IsEqual(point, line.GetEndPoint(1)))
{
Autodesk.Revit.DB.XYZ vector = GeomUtil.SubXYZ(line.GetEndPoint(0), line.GetEndPoint(1));
vectors.Add(vector);
}
}
// only two vector(direction) should be found
if (2 != vectors.Count)
{
throw new Exception("a point on swept profile should have only two direction.");
}
return(vectors);
}
/// <summary>
/// Get the swept profile(face) of the host object(family instance)
/// </summary>
/// <param name="solid">the solid reference</param>
/// <returns>the swept profile</returns>
private Face GetSweptProfileFace(Solid solid)
{
// Get a point on the swept profile from all points in solid
Autodesk.Revit.DB.XYZ refPoint = new Autodesk.Revit.DB.XYZ(); // the point on swept profile
foreach (Edge edge in solid.Edges)
{
List <XYZ> points = edge.Tessellate() as List <XYZ>; //get end points of the edge
if (2 != points.Count) // make sure all edges are lines
{
throw new Exception("All edge should be line.");
}
// get two points of the edge. All points in solid should be transform first
Autodesk.Revit.DB.XYZ first = Transform(points[0]); // start point of edge
Autodesk.Revit.DB.XYZ second = Transform(points[1]); // end point of edge
// some edges should be paralleled with the driving line,
// and the start point of that edge should be the wanted point
Autodesk.Revit.DB.XYZ edgeVector = GeomUtil.SubXYZ(second, first);
if (GeomUtil.IsSameDirection(edgeVector, m_drivingVector))
{
refPoint = first;
break;
}
if (GeomUtil.IsOppositeDirection(edgeVector, m_drivingVector))
{
refPoint = second;
break;
}
}
// Find swept profile(face)
Face sweptFace = null; // define the swept face
foreach (Face face in solid.Faces)
{
if (null != sweptFace)
{
break;
}
// the swept face should be perpendicular with the driving line
if (!GeomUtil.IsVertical(face, m_drivingLine, m_transform, null))
{
continue;
}
// use the got point to get the swept face
foreach (Autodesk.Revit.DB.XYZ point in face.Triangulate().Vertices)
{
Autodesk.Revit.DB.XYZ pnt = Transform(point); // all points in solid should be transform
if (GeomUtil.IsEqual(refPoint, pnt))
{
sweptFace = face;
break;
}
}
}
return(sweptFace);
}
int IComparer <Autodesk.Revit.DB.XYZ> .Compare(Autodesk.Revit.DB.XYZ first, Autodesk.Revit.DB.XYZ second)
{
// first compare z coordinate, then y coordinate, at last x coordinate
if (GeomUtil.IsEqual(first.Z, second.Z))
{
if (GeomUtil.IsEqual(first.Y, second.Y))
{
if (GeomUtil.IsEqual(first.X, second.X))
{
return(0);
}
return((first.X > second.X) ? 1 : -1);
}
return((first.Y > second.Y) ? 1 : -1);
}
return((first.Z > second.Z) ? 1 : -1);
}