| public CrossProduct ( Vector4 v ) : Vector4 | ||
| v | Vector4 | second vector |
| return | Vector4 | |
/// <summary>
/// Get wall face
/// </summary>
/// <param name="faces"></param>
/// <returns></returns>
private List <Edge> GetWallFace(List <List <Edge> > faces)
{
LocationCurve location = m_dataProfile.Location as LocationCurve;
Curve curve = location.Curve;
List <XYZ> xyzs = curve.Tessellate() as List <XYZ>;
Vector4 zAxis = new Vector4(0, 0, 1);
if (xyzs.Count == 2)
{
return(faces[0]);
}
foreach (List <Edge> face in faces)
{
foreach (Edge edge in face)
{
List <XYZ> edgexyzs = edge.Tessellate() as List <XYZ>;
if (xyzs.Count == edgexyzs.Count)
{
Vector4 normal = GetFaceNormal(face);
Vector4 cross = Vector4.CrossProduct(zAxis, normal);
cross.Normalize();
if (cross.Length() == 1)
{
return(face);
}
}
}
}
return(faces[0]);
}
/// <summary>
/// Wall matrix
/// </summary>
/// <returns></returns>
public Matrix4 WallMatrix()
{
//get the location curve
LocationCurve location = m_dataProfile.Location as LocationCurve;
Vector4 xAxis = new Vector4(1, 0, 0);
Vector4 yAxis = new Vector4(0, 1, 0);
Vector4 zAxis = new Vector4(0, 0, 1);
Vector4 origin = new Vector4(0, 0, 0);
if (location != null)
{
Curve curve = location.Curve;
Autodesk.Revit.DB.XYZ start = curve.GetEndPoint(0);
Autodesk.Revit.DB.XYZ end = curve.GetEndPoint(1);
xAxis = new Vector4((float)(end.X - start.X),
(float)(end.Y - start.Y), (float)(end.Z - start.Z));
xAxis.Normalize();
yAxis = new Vector4(0, 0, 1);
zAxis = Vector4.CrossProduct(xAxis, yAxis);
zAxis.Normalize();
origin = new Vector4((float)(end.X + start.X) / 2,
(float)(end.Y + start.Y) / 2, (float)(end.Z + start.Z) / 2);
}
return(new Matrix4(xAxis, yAxis, zAxis, origin));
}
/// <summary>
/// Get Face Normal
/// </summary>
/// <param name="face">Edges in a face</param>
private Vector4 GetFaceNormal(List <Edge> face)
{
Edge eg0 = face[0];
Edge eg1 = face[1];
List <XYZ> points = eg0.Tessellate() as List <XYZ>;
Autodesk.Revit.DB.XYZ start = points[0];
Autodesk.Revit.DB.XYZ end = points[1];
Vector4 vStart = new Vector4((float)start.X, (float)start.Y, (float)start.Z);
Vector4 vEnd = new Vector4((float)end.X, (float)end.Y, (float)end.Z);
Vector4 vSub = vEnd - vStart;
points = eg1.Tessellate() as List <XYZ>;
start = points[0];
end = points[1];
vStart = new Vector4((float)start.X, (float)start.Y, (float)start.Z);
vEnd = new Vector4((float)end.X, (float)end.Y, (float)end.Z);
Vector4 vSub2 = vEnd - vStart;
Vector4 result = vSub.CrossProduct(vSub2);
result.Normalize();
return(result);
}
/// <summary>
/// Get a matrix which can transform points to 2D
/// </summary>
public Matrix4 To2DMatrix()
{
if (m_dataProfile is Wall)
{
return(WallMatrix());
}
List <XYZ> eg0 = m_face[0].Tessellate() as List <XYZ>;
List <XYZ> eg1 = m_face[1].Tessellate() as List <XYZ>;
Vector4 v1 = new Vector4((float)eg0[0].X,
(float)eg0[0].Y, (float)eg0[0].Z);
Vector4 v2 = new Vector4((float)eg0[1].X,
(float)eg0[1].Y, (float)eg0[1].Z);
Vector4 v21 = v1 - v2;
v21.Normalize();
Vector4 v3 = new Vector4((float)eg1[0].X,
(float)eg1[0].Y, (float)eg1[0].Z);
Vector4 v4 = new Vector4((float)eg1[1].X,
(float)eg1[1].Y, (float)eg1[1].Z);
Vector4 v43 = v4 - v3;
v43.Normalize();
Vector4 vZAxis = Vector4.CrossProduct(v43, v21);
Vector4 vYAxis = Vector4.CrossProduct(vZAxis, v43);
vYAxis.Normalize();
vZAxis.Normalize();
Vector4 vOrigin = (v4 + v1) / 2;
Matrix4 result = new Matrix4(v43, vYAxis, vZAxis, vOrigin);
return(result);
}
