/// <summary>
/// Exports a slice of the SAR field at the plane defined by the normal direction and location parameters.
/// </summary>
/// <param name="fileName">Name of the output .png file.</param>
/// <param name="direction">Normal direction of the SAR slice plane.</param>
/// <param name="location">Location of the slice along the normal direction.</param>
public void ToPNG(string fileName, ENormDir direction, double location)
{
int imageSize = 512; // TBD
double clipdB = -40.0; // TBD
FieldSlice fieldSlice = GetFieldSlice(direction, location);
int pixelSizeX, pixelSizeY;
double fieldSizeX = fieldSlice.Mesh[0].Last() - fieldSlice.Mesh[0].First();
double fieldSizeY = fieldSlice.Mesh[1].Last() - fieldSlice.Mesh[1].First();
double stepSize;
if (fieldSizeX > fieldSizeY)
{
pixelSizeX = imageSize;
pixelSizeY = (int)(imageSize * fieldSizeY / fieldSizeX);
stepSize = fieldSizeX / (imageSize - 1);
}
else
{
pixelSizeY = imageSize;
pixelSizeX = (int)(imageSize * fieldSizeX / fieldSizeY);
stepSize = fieldSizeY / (imageSize - 1);
}
Bitmap bmp = new Bitmap(pixelSizeX, pixelSizeY, System.Drawing.Imaging.PixelFormat.Format32bppRgb);
double fieldStartX = fieldSlice.Mesh[0][0];
double fieldStartY = fieldSlice.Mesh[1][0];
double fieldMax = fieldSlice.Max();
for (int x = 0; x < pixelSizeX; x++)
{
for (int y = 0; y < pixelSizeY; y++)
{
double valSAR = fieldSlice.GetValueAt(
fieldSlice.Mesh[0][0] + x * stepSize,
fieldSlice.Mesh[1][0] + y * stepSize);
double valSARdB = 10 * Math.Log10(valSAR);
valSARdB -= 10 * Math.Log10(fieldMax);
double hueSARdB = valSARdB / clipdB * 240.0;
hueSARdB = hueSARdB > 240.0 ? 240.0 : hueSARdB;
bmp.SetPixel(x, y, ColorFromHSV(hueSARdB, 1.0, 0.9));
}
}
bmp.RotateFlip(RotateFlipType.RotateNoneFlipY);
bmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);
}
public void SAR_GetValueAt_NonGridPoint_ReturnsGridPointValue()
{
double refFieldValue = 2.0;
double[][] mesh = SAR_BuildExampleMesh();
double[,] field = SAR_BuildConstantField(mesh, refFieldValue);
Postprocess.FieldSlice fieldSlice = new FieldSlice(mesh, field);
double dutFieldValue = fieldSlice.GetValueAt((mesh[0][1] + mesh[0][2]) / 2, (mesh[1][1] + mesh[1][2]) / 2);
Assert.Equal(refFieldValue, dutFieldValue);
}
public void SAR_GetValueAt_OutOfRangeInput_ThrowsException()
{
double refFieldValue = 2.0;
double[][] mesh = SAR_BuildExampleMesh();
double[,] field = SAR_BuildConstantField(mesh, refFieldValue);
Postprocess.FieldSlice fieldSlice = new FieldSlice(mesh, field);
Assert.Throws<ArgumentException>(
delegate
{
fieldSlice.GetBoundingMeshIndeces(mesh[0][0] - 1.0, mesh[1][0] - 0.0);
});
}
public void SAR_GetBoundingMeshIndeces_NonGridPointInput_ReturnsCorrectValue()
{
double[][] mesh = SAR_BuildExampleMesh();
Postprocess.FieldSlice fieldSlice = new FieldSlice(mesh, null);
int[,] refIndeces = new int[2,2] { {1, 2}, {1, 2} };
int[,] dutIndeces = fieldSlice.GetBoundingMeshIndeces(mesh[0][1] + 0.1, mesh[1][1] + 0.1);
Assert.Equal(refIndeces, dutIndeces);
}
public void SAR_GetBoundingMeshIndeces_OutOfRangeInput_ThrowsException()
{
double[][] mesh = SAR_BuildExampleMesh();
Postprocess.FieldSlice fieldSlice = new FieldSlice(mesh, null);
Assert.Throws<ArgumentException>(
delegate
{
fieldSlice.GetBoundingMeshIndeces(mesh[0][0] - 1.0, mesh[1][0] - 1.0);
});
}