/// <summary>
/// Calculate the matrix use to transform 3D to 2D
/// </summary>
private Matrix4 Comuter3DTo2DMatrix()
{
Matrix4 result = Matrix4.Multiply(
m_to2DMatrix.Inverse(), m_moveToCenterMatrix.Inverse());
result = Matrix4.Multiply(result, m_scaleMatrix);
return(result);
}
/// <summary>
/// Get Face Bounds
/// </summary>
public PointF[] GetFaceBounds()
{
Matrix4 matrix = To2DMatrix();
Matrix4 inverseMatrix = matrix.Inverse();
float minX = 0, maxX = 0, minY = 0, maxY = 0;
bool bFirstPoint = true;
foreach (Edge edge in m_face)
{
List <XYZ> points = edge.Tessellate() as List <XYZ>;
foreach (Autodesk.Revit.DB.XYZ point in points)
{
Vector4 v = new Vector4(point);
Vector4 v1 = inverseMatrix.TransForm(v);
if (bFirstPoint)
{
minX = maxX = v1.X;
minY = maxY = v1.Y;
bFirstPoint = false;
}
else
{
if (v1.X < minX)
{
minX = v1.X;
}
else if (v1.X > maxX)
{
maxX = v1.X;
}
if (v1.Y < minY)
{
minY = v1.Y;
}
else if (v1.Y > maxY)
{
maxY = v1.Y;
}
}
}
}
PointF[] resultPoints = new PointF[2] {
new PointF(minX, minY), new PointF(maxX, maxY)
};
return(resultPoints);
}
/// <summary>
/// Transform the point on Form to 3d world coordinate of Revit
/// </summary>
/// <param name="ps">contain the points to be transform</param>
private List <Vector4> TransForm2DTo3D(Point[] ps)
{
List <Vector4> result = new List <Vector4>();
TransFormPoints(ps);
Matrix4 transFormMatrix = Matrix4.Multiply(
m_scaleMatrix.Inverse(), m_moveToCenterMatrix);
transFormMatrix = Matrix4.Multiply(transFormMatrix, m_to2DMatrix);
foreach (Point point in ps)
{
Vector4 v = new Vector4(point.X, point.Y, 0);
v = transFormMatrix.TransForm(v);
result.Add(v);
}
return(result);
}
