/// <summary>
/// calculate the matrix used to transform 2D to 3D
/// </summary>
/// <returns>maxtrix is use to transform 2d points to 3d</returns>
public Matrix4 Get2DTo3DMatrix()
{
Matrix4 matrix = Matrix4.Multiply(
m_MoveToPictureBoxCenter.Inverse(), m_scaleMatrix.Inverse());
matrix = Matrix4.Multiply(
matrix, m_moveToCenterMatrix);
return(Matrix4.Multiply(matrix, m_to2DMatrix));
}
/// <summary>
/// calculate the matrix used to transform 3D to 2D
/// </summary>
/// <returns>maxtrix is use to transform 3d points to 2d</returns>
public Matrix4 Get3DTo2DMatrix()
{
Matrix4 result = Matrix4.Multiply(
m_to2DMatrix.Inverse(), m_moveToCenterMatrix.Inverse());
result = Matrix4.Multiply(result, m_scaleMatrix);
return(Matrix4.Multiply(result, m_MoveToPictureBoxCenter));
}
/// <summary>
/// Get max and min coordinates of all points
/// </summary>
/// <returns>points array stores the bound of all points</returns>
public PointF[] GetBoundsPoints()
{
Matrix4 matrix = m_to2DMatrix;
Matrix4 inverseMatrix = matrix.Inverse();
double minX = 0, maxX = 0, minY = 0, maxY = 0;
bool bFirstPoint = true;
//get all points on slab
List <XYZ> points = new List <XYZ>();
foreach (Edge edge in m_edges)
{
List <XYZ> edgexyzs = edge.Tessellate() as List <XYZ>;
foreach (Autodesk.Revit.DB.XYZ xyz in edgexyzs)
{
points.Add(xyz);
}
}
//get the max and min point on the face
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;
}
}
}
//return an array with max and min value of all points
PointF[] resultPoints = new PointF[2] {
new PointF((float)minX, (float)minY), new PointF((float)maxX, (float)maxY)
};
return(resultPoints);
}