ArcObjects Library Reference (Geometry)

ITransformation.TransformPointsFF Method

[Visual Basic .NET]
Public Sub TransformPointsFF ( _
    ByVal direction As esriTransformDirection, _
    ByVal cPoints As Integer, _
    ByRef inPoints As Double, _
    ByRef outPoints As Double _
)

[C#]
public void TransformPointsFF (
    esriTransformDirection direction,
    int cPoints,
    ref double inPoints,
    ref double outPoints
);

[C++]
HRESULT TransformPointsFF(
  esriTransformDirection direction,
  long cPoints,
  double* inPoints,
  double* outPoints
);

[C++]
Parameters
direction 
  direction is a parameter of type esriTransformDirection
cPoints 
  cPoints is a parameter of type long
inPoints 
  inPoints is a parameter of type double
outPoints 
  outPoints is a parameter of type double

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

[C#]

The cPoints parameter is the number of points you wish to transform. inPoints and outPoints are one-dimensional arrays so you must interleave coordinate pairs into the arrays.  This code is a shift of the points to the east and north.

 

            IAffineTransformation2D transform = new AffineTransformation2D() as IAffineTransformation2D;
            //Sets the type of transformation moving the values 10 degrees East and 20 degrees North
            transform.Move(10, 20);
            //Create two single dimensioned arrays for the inPoints and OutPoints
            double[] inPoints = new double[4];
            double[] outPoints = new double[4];

            //Interleave the Longitude and Latitude value for two points 1.1E 5.2N, 2.3E 6.4N
            inPoints[0]=1.1; //Longitude point 1
            inPoints[1]=5.2; //Latitude point 1
            inPoints[2]=2.3; //Longitude point 2
            inPoints[3] = 6.4; //Latitude point 2

            transform.TransformPointsFF(0,2,ref inPoints[0],ref outPoints[0]);
            Debug.Print(outPoints[0].ToString()); //11.1
            Debug.Print(outPoints[1].ToString()); //25.2
            Debug.Print(outPoints[2].ToString()); //12.3
            Debug.Print(outPoints[3].ToString()); //26.4