/// <summary>
/// Executes the Erase Opaeration tool programaticaly.
/// </summary>
/// <param name="input1">The input raster.</param>
/// <param name="input2">The input raster.</param>
/// <param name="output">The output raster.</param>
/// <param name="cancelProgressHandler">The progress handler.</param>
/// <returns></returns>
public bool Execute(IRaster input1, IFeatureSet input2, IRaster output, MapWindow.Tools.ICancelProgressHandler cancelProgressHandler)
{
//Validates the input and output data
if (input1 == null || input2 == null || output == null)
{
return false;
}
int noOfCol = input1.NumColumns;
int noOfRow = input1.NumRows;
//Calculate the Intersect Envelope
IEnvelope envelope1 = new Envelope() as IEnvelope;
IEnvelope envelope2 = new Envelope() as IEnvelope;
envelope1 = input1.Bounds.Envelope;
envelope2 = input2.Envelope;
envelope1 = envelope1.Intersection(envelope2);
//Create the new raster with the appropriate dimensions
IRaster Temp = Raster.Create(output.Filename, "", noOfCol, noOfRow, 1, input1.DataType, new string[] { });
//Temp.CreateNew(output.Filename, noOfRow, noOfCol, input1.DataType);
Temp.CellWidth = input1.CellWidth;
Temp.CellHeight = input1.CellHeight;
Temp.Xllcenter = envelope1.Minimum.X + (Temp.CellWidth / 2);
Temp.Yllcenter = envelope1.Minimum.Y + (Temp.CellHeight / 2);
MapWindow.Geometries.ICoordinate I1 = new MapWindow.Geometries.Coordinate() as MapWindow.Geometries.ICoordinate;
RcIndex v1 = new RcIndex();
// MapWindow.Analysis.Topology.Algorithm.PointLocator pointLocator1 = new MapWindow.Analysis.Topology.Algorithm.PointLocator();
double val1;
int previous = 0;
int current = 0;
int max = (Temp.Bounds.NumRows + 1);
for (int i = 0; i < Temp.Bounds.NumRows; i++)
{
for (int j = 0; j < Temp.Bounds.NumColumns; j++)
{
I1 = Temp.CellToProj(i, j);
v1 = input1.ProjToCell(I1);
if (v1.Row <= input1.EndRow && v1.Column <= input1.EndColumn && v1.Row > -1 && v1.Column > -1)
val1 = input1.Value[v1.Row, v1.Column];
else
val1 = Temp.NoDataValue;
//test if the coordinate is inside of the polygon
bool isInside = false;
IFeature pointFeat = new Feature(new Point(I1)) as IFeature;
foreach (IFeature f in input2.Features)
{
if (f.Contains(pointFeat))
{
Temp.Value[i, j] = val1;
isInside = true;
break;
}
}
if (isInside == false)
{
Temp.Value[i, j] = Temp.NoDataValue;
}
if (cancelProgressHandler.Cancel == true)
return false;
}
current = Convert.ToInt32(Math.Round(i * 100D / max));
//only update when increment in percentage
if (current > previous)
cancelProgressHandler.Progress("", current, current.ToString() + "% progress completed");
previous = current;
}
output = Temp;
output.Save();
return true;
}
/// <summary>
/// Performs an intersection of this line segment with the specified envelope
/// </summary>
/// <param name="inEnvelope">The envelope to compare against</param>
/// <returns>An ILineSegment, or null if there is no intersection.</returns>
public ILineSegment Intersection(Envelope inEnvelope)
{
return inEnvelope.Intersection(this);
}