/// <summary>
/// Compute the angle between two edges
/// </summary>
/// <param name="edgeA">The 1st edge</param>
/// <param name="edgeB">The 2nd edge</param>
/// <returns>The angle of the 2 edges</returns>
private double AngleBetweenEdges(Edge edgeA, Edge edgeB)
{
Autodesk.Revit.DB.XYZ vectorA = null;
Autodesk.Revit.DB.XYZ vectorB = null;
// find coincident vertices
Autodesk.Revit.DB.XYZ A_0 = edgeA.Evaluate(0);
Autodesk.Revit.DB.XYZ A_1 = edgeA.Evaluate(1);
Autodesk.Revit.DB.XYZ B_0 = edgeB.Evaluate(0);
Autodesk.Revit.DB.XYZ B_1 = edgeB.Evaluate(1);
if (A_0.IsAlmostEqualTo(B_0))
{
vectorA = edgeA.ComputeDerivatives(0).BasisX.Normalize();
vectorB = edgeA.ComputeDerivatives(0).BasisX.Normalize();
}
else if (A_0.IsAlmostEqualTo(B_1))
{
vectorA = edgeA.ComputeDerivatives(0).BasisX.Normalize();
vectorB = edgeB.ComputeDerivatives(1).BasisX.Normalize();
}
else if (A_1.IsAlmostEqualTo(B_0))
{
vectorA = edgeA.ComputeDerivatives(1).BasisX.Normalize();
vectorB = edgeB.ComputeDerivatives(0).BasisX.Normalize();
}
else if (A_1.IsAlmostEqualTo(B_1))
{
vectorA = edgeA.ComputeDerivatives(1).BasisX.Normalize();
vectorB = edgeB.ComputeDerivatives(1).BasisX.Normalize();
}
if (A_1.IsAlmostEqualTo(B_0) || A_0.IsAlmostEqualTo(B_1))
{
vectorA = vectorA.Negate();
}
if (null == vectorA || null == vectorB)
{
return(0d);
}
double angle = Math.Acos(vectorA.DotProduct(vectorB));
return(angle);
}
/// <summary>
/// Project a point on a face
/// </summary>
/// <param name="xyzArray">the face points, them fix a face </param>
/// <param name="point">the point</param>
/// <returns>the projected point on this face</returns>
static private Autodesk.Revit.DB.XYZ Project(List <XYZ> xyzArray, Autodesk.Revit.DB.XYZ point)
{
Autodesk.Revit.DB.XYZ a = xyzArray[0] - xyzArray[1];
Autodesk.Revit.DB.XYZ b = xyzArray[0] - xyzArray[2];
Autodesk.Revit.DB.XYZ c = point - xyzArray[0];
Autodesk.Revit.DB.XYZ normal = (a.CrossProduct(b));
try
{
normal = normal.Normalize();
}
catch (Exception)
{
normal = Autodesk.Revit.DB.XYZ.Zero;
}
Autodesk.Revit.DB.XYZ retProjectedPoint = point - (normal.DotProduct(c)) * normal;
return(retProjectedPoint);
}
/// <summary>
/// OK button click event
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void buttonOK_Click(object sender, EventArgs e)
{
DeleteLines();
if (!UpdateData(false))
{
return;
}
m_outputInfo.Clear();
m_stopWatch.Start();
Transaction transaction = new Transaction(m_doc, "RayTraceBounce");
transaction.Start();
m_LineCount = 0;
m_RayCount = 0;
// Start Find References By Direction
Autodesk.Revit.DB.XYZ startpt = m_origin;
m_outputInfo.Add("Start Find References By Direction: ");
for (int ctr = 1; ctr <= rayLimit; ctr++)
{
ReferenceIntersector referenceIntersector = new ReferenceIntersector(m_view);
IList <ReferenceWithContext> references = referenceIntersector.Find(startpt, m_direction);
m_rClosest = null;
FindClosestReference(references);
if (m_rClosest == null)
{
string info = "Ray " + ctr + " aborted. No closest face reference found. ";
m_outputInfo.Add(info);
if (ctr == 1)
{
TaskDialog.Show("Revit", info);
}
break;
}
else
{
Reference reference = m_rClosest.GetReference();
Element referenceElement = m_doc.GetElement(reference);
GeometryObject referenceObject = referenceElement.GetGeometryObjectFromReference(reference);
Autodesk.Revit.DB.XYZ endpt = reference.GlobalPoint;
if (startpt.IsAlmostEqualTo(endpt))
{
m_outputInfo.Add("Start and end points are equal. Ray " + ctr + " aborted\n" + startpt.X + ", " + startpt.Y + ", " + startpt.Z);
break;
}
else
{
MakeLine(startpt, endpt, m_direction, "bounce");
m_RayCount = m_RayCount + 1;
string info = "Intersected Element Type: [" + referenceElement.GetType().ToString() + "] ElementId: [" + referenceElement.Id.IntegerValue.ToString();
m_face = referenceObject as Face;
if (m_face.MaterialElementId != ElementId.InvalidElementId)
{
Material materialElement = m_doc.GetElement(m_face.MaterialElementId) as Material;
info += "] Face MaterialElement Name: [" + materialElement.Name + "] Shininess: [" + materialElement.Shininess;
}
else
{
info += "] Face.MaterialElement is null [" + referenceElement.Category.Name;
}
info += "]";
m_outputInfo.Add(info);
Autodesk.Revit.DB.UV endptUV = reference.UVPoint;
Autodesk.Revit.DB.XYZ FaceNormal = m_face.ComputeDerivatives(endptUV).BasisZ; // face normal where ray hits
FaceNormal = m_rClosest.GetInstanceTransform().OfVector(FaceNormal); // transformation to get it in terms of document coordinates instead of the parent symbol
Autodesk.Revit.DB.XYZ directionMirrored = m_direction - 2 * m_direction.DotProduct(FaceNormal) * FaceNormal; //http://www.fvastro.org/presentations/ray_tracing.htm
m_direction = directionMirrored; // get ready to shoot the next ray
startpt = endpt;
}
}
}
transaction.Commit();
m_stopWatch.Stop();
TimeSpan ts = m_stopWatch.Elapsed;
string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
m_outputInfo.Add(elapsedTime + "\n" + "Lines = " + m_LineCount + "\n" + "Rays = " + m_RayCount);
m_stopWatch.Reset();
OutputInformation();
}
private static void GetPolygonPlane(IReadOnlyList <RVT.XYZ> polygon, out RVT.XYZ normal, out double dist, out double area)
{
normal = RVT.XYZ.Zero;
dist = area = 0.0;
var n = polygon.Count;
var rc = (2 < n);
if (3 == n)
{
var a = polygon[0];
var b = polygon[1];
var c = polygon[2];
var v = b - a;
normal = v.CrossProduct(c - a);
dist = normal.DotProduct(a);
}
else if (4 == n)
{
var a = polygon[0];
var b = polygon[1];
var c = polygon[2];
var d = polygon[3];
var normalX = (c.Y - a.Y) * (d.Z - b.Z) + (c.Z - a.Z) * (b.Y - d.Y);
var normalY = (c.Z - a.Z) * (d.X - b.X) + (c.X - a.X) * (b.Z - d.Z);
var normalZ = (c.X - a.X) * (d.Y - b.Y) + (c.Y - a.Y) * (b.X - d.X);
normal = new RVT.XYZ(normalX, normalY, normalZ);
dist = 0.25 * (normal.X * (a.X + b.X + c.X + d.X) + normal.Y * (a.Y + b.Y + c.Y + d.Y) + normal.Z * (a.Z + b.Z + c.Z + d.Z));
}
else if (4 < n)
{
RVT.XYZ a;
var b = polygon[n - 2];
var c = polygon[n - 1];
var s = RVT.XYZ.Zero;
for (var i = 0; i < n; ++i)
{
a = b;
b = c;
c = polygon[i];
var normalX = normal.X + b.Y * (c.Z - a.Z);
var normalY = normal.Y + b.Z * (c.X - a.X);
var normalZ = normal.Z + b.X * (c.Y - a.Y);
normal = new RVT.XYZ(normalX, normalY, normalZ);
s += c;
}
dist = s.DotProduct(normal) / n;
}
if (rc)
{
//
// the polygon area is half of the length
// of the non-normalized normal vector of the plane:
//
var length = normal.GetLength();
rc = !IsZero(length);
if (rc)
{
normal /= length;
dist /= length;
area = 0.5 * length;
}
}
}
