/// <summary>
/// Update DFS2 bathymetry, lowering bathymetry with 5.61 meters everywhere,
/// taking land value into account.
/// <para>
/// The method assumes that the OresundBathy900.dfs2 test file
/// (or preferably a copy of it) is the input file.
/// </para>
/// </summary>
/// <param name="bathyFilename">Path and name of OresundBathy900.dfs2 test file</param>
public static void ModifyDfs2Bathymetry(string bathyFilename)
{
// Open file
Dfs2File dfs2 = DfsFileFactory.Dfs2FileOpenEdit(bathyFilename);
// Second custom block (index 1) contains the M21_MISC values,
// where the 4th (index 3) is the land value
float landValue = (float)dfs2.FileInfo.CustomBlocks[1][3];
// Read bathymetry data
IDfsItemData2D <float> bathyData = (IDfsItemData2D <float>)dfs2.ReadItemTimeStepNext();
// Modify bathymetry data
for (int i = 0; i < bathyData.Data.Length; i++)
{
if (bathyData.Data[i] != landValue)
{
bathyData.Data[i] -= 5.61f;
}
}
// Write back bathymetry data
dfs2.WriteItemTimeStep(1, 0, 0, bathyData.Data);
dfs2.Close();
}
/// <summary>
/// Example of how to create a M21 Dfs2 Bathymetry from scratch. This method
/// creates a file matching the OresundBathy900.dfs2 test file.
/// </summary>
/// <param name="bathyDataArray">Array of bathymetry data, 1D array with 2D data, size n x m</param>
/// <param name="filename">Path and name of the new file to create</param>
public static void CreateM21Bathymetry(float[] bathyDataArray, string filename)
{
DfsFactory factory = new DfsFactory();
Dfs2Builder builder = Dfs2Builder.Create(@"C:\0\Training\Bat1_0.dfs2", @"Grid editor", 1);
// Set up the header
builder.SetDataType(0);
builder.SetGeographicalProjection(factory.CreateProjectionGeoOrigin("UTM-33", 12.438741600559911, 55.2257078424238, 327));
builder.SetTemporalAxis(factory.CreateTemporalEqCalendarAxis(eumUnit.eumUsec, new DateTime(2003, 01, 01, 0, 0, 0), 0, 1));
builder.SetSpatialAxis(factory.CreateAxisEqD2(eumUnit.eumUmeter, 72, 0, 900, 94, 0, 900));
builder.DeleteValueFloat = -1e-30f;
builder.AddCustomBlock(factory.CreateCustomBlock("Display Settings", new int[] { 1, 0, 0 }));
builder.AddCustomBlock(factory.CreateCustomBlock("M21_Misc", new float[] { 327f, 0f, -900f, 10f, 0f, 0f, 0f }));
// Set up dynamic items
builder.AddDynamicItem("Bathymetry", eumQuantity.Create(eumItem.eumIWaterLevel, eumUnit.eumUmeter),
DfsSimpleType.Float, DataValueType.Instantaneous);
// Create and get file
builder.CreateFile(filename);
Dfs2File file = builder.GetFile();
// Add bathymetry data
file.WriteItemTimeStepNext(0, bathyDataArray);
file.Close();
}
/// <summary>
/// Example of how to get from a geographical coordinate to an (j,k) index
/// in the 2D grid. It also shows how to get the closest cell value and how
/// to perform bilinear interpolation.
/// <para>
/// The method assumes that the OresundHD.dfs2 test file is the input file.
/// </para>
/// </summary>
/// <param name="filename">Path and name of OresundHD.dfs2 test file</param>
public static void GetjkIndexForGeoCoordinate(string filename)
{
Dfs2File file = DfsFileFactory.Dfs2FileOpen(filename);
// The spatial axis is a EqD2 axis
IDfsAxisEqD2 axis = (IDfsAxisEqD2)file.SpatialAxis;
// Data for first time step
IDfsItemData2D <float> data = (IDfsItemData2D <float>)file.ReadItemTimeStep(1, 0);
// Get the projection and create a cartography object
IDfsProjection projection = file.FileInfo.Projection;
DHI.Projections.Cartography cart = new DHI.Projections.Cartography(projection.WKTString, projection.Longitude, projection.Latitude, projection.Orientation);
// Coordinates just south of Amager
double lon = 12.59;
double lat = 55.54;
// Get the (x,y) grid coordinates
double x;
double y;
cart.Geo2Xy(lon, lat, out x, out y);
Console.Out.WriteLine("Grid coordinates (x,y) = ({0:0.000},{1:0.000})", x, y);
Console.Out.WriteLine("Relative grid coordinates (x,y) = ({0:0.000},{1:0.000})", x / axis.Dx, y / axis.Dy);
// Calculate the cell indices of the lon-lat coordinate.
// The cell extents from its center and +/- 1/2 dx and dy
// in each direction
int j = (int)(x / axis.Dx + 0.5); // 30
int k = (int)(y / axis.Dy + 0.5); // 27
Console.Out.WriteLine("Value in cell ({0},{1}) = {2}", j, k, data[j, k]);
// If you want to interpolate between the values, calculate
// the (j,k) indices of lower left corner and do bilinear interpolation.
// This procedure does not take delete values into account!!!
j = (int)(x / axis.Dx); // 30
k = (int)(y / axis.Dy); // 26
double xFrac = (x % axis.Dx) / axis.Dx; // fraction of j+1 value
double yFrac = (y % axis.Dy) / axis.Dy; // fraction of k+1 value
double vk = (1 - xFrac) * data[j, k] + xFrac * data[j + 1, k];
double vkp1 = (1 - xFrac) * data[j, k + 1] + xFrac * data[j + 1, k + 1];
double v = (1 - yFrac) * vk + yFrac * vkp1;
Console.Out.WriteLine("Interpolated value = {0}", v);
file.Close();
}
/// <summary>
/// Example of how to update item axis in a dfs2 file.
/// <para>
/// The method assumes that the OresundHD.dfs2 test file
/// (or preferably a copy of it) is the input file.
/// </para>
/// </summary>
/// <param name="filename">Path and name of OresundHD.dfs2 test file</param>
public static void ModifyDfs2ItemAxis(string filename)
{
Dfs2File file = DfsFileFactory.Dfs2FileOpenEdit(filename);
IDfsAxisEqD2 axisEqD2 = ((IDfsAxisEqD2)file.SpatialAxis);
axisEqD2.X0 = 55;
axisEqD2.Dx = 905;
axisEqD2.Y0 = -55;
axisEqD2.Dy = 915;
file.Close();
}
/// <summary>
/// Create maximum velocity field for a dfs2 file
/// <para>
/// FFrom a dfs2 file containing items (H-P-Q), (P-Q-Speed) or (u-v-Speed),
/// find maximum velocity for each cell and store in [outputFilename]
/// </para>
/// </summary>
public static void MaxVelocityField(string sourceFilename, string outfilename)
{
// Open source file
IDfs2File source = DfsFileFactory.Dfs2FileOpen(sourceFilename);
// Create output file
Dfs2Builder builder = Dfs2Builder.Create("Max Velocity", @"MIKE SDK", 0);
// Set up the header
builder.SetDataType(1);
builder.SetGeographicalProjection(source.FileInfo.Projection);
builder.SetTemporalAxis(source.FileInfo.TimeAxis);
builder.SetSpatialAxis(source.SpatialAxis);
builder.DeleteValueFloat = -1e-30f;
// Add custom block
foreach (IDfsCustomBlock customBlock in source.FileInfo.CustomBlocks)
{
builder.AddCustomBlock(customBlock);
}
// Set up dynamic items
builder.AddDynamicItem("Maximum Speed", eumQuantity.Create(eumItem.eumIFlowVelocity, eumUnit.eumUmeterPerSec), DfsSimpleType.Float, DataValueType.Instantaneous);
builder.AddDynamicItem("u-velocity", eumQuantity.Create(eumItem.eumIFlowVelocity, eumUnit.eumUmeterPerSec), DfsSimpleType.Float, DataValueType.Instantaneous);
builder.AddDynamicItem("v-velocity", eumQuantity.Create(eumItem.eumIFlowVelocity, eumUnit.eumUmeterPerSec), DfsSimpleType.Float, DataValueType.Instantaneous);
//builder.AddDynamicItem("H Water Depth m", eumQuantity.Create(eumItem.eumIWaterLevel, eumUnit.eumUmeter), DfsSimpleType.Float, DataValueType.Instantaneous);
// Create file
builder.CreateFile(outfilename);
// Add static items containing bathymetri data, use data from source
IDfsStaticItem sourceStaticItem;
while (null != (sourceStaticItem = source.ReadStaticItemNext()))
{
builder.AddStaticItem(sourceStaticItem.Name, sourceStaticItem.Quantity, sourceStaticItem.Data);
}
// Get the file
Dfs2File file = builder.GetFile();
// Arrays storing max-speed values
int numberOfCells = file.SpatialAxis.SizeOfData;
float[] maxSpeed = new float[numberOfCells];
float[] uAtMaxSpeed = new float[numberOfCells];
float[] vAtMaxSpeed = new float[numberOfCells];
// Initialize with delete values
for (int i = 0; i < numberOfCells; i++)
{
maxSpeed[i] = source.FileInfo.DeleteValueFloat;
uAtMaxSpeed[i] = source.FileInfo.DeleteValueFloat;
vAtMaxSpeed[i] = source.FileInfo.DeleteValueFloat;
}
// Create empty ItemData's, for easing reading of source data
IDfsItemData2D <float>[] datas = new IDfsItemData2D <float> [source.ItemInfo.Count];
for (int i = 0; i < source.ItemInfo.Count; i++)
{
datas[i] = source.CreateEmptyItemData <float>(i + 1);
}
// Find HPQ items in file - uses StartsWith, since the string varies slightly with the version of the engine.
int dIndex = source.ItemInfo.FindIndex(item => item.Name.StartsWith("H Water Depth", StringComparison.OrdinalIgnoreCase));
int pIndex = source.ItemInfo.FindIndex(item => item.Name.StartsWith("P Flux", StringComparison.OrdinalIgnoreCase));
int qIndex = source.ItemInfo.FindIndex(item => item.Name.StartsWith("Q Flux", StringComparison.OrdinalIgnoreCase));
int sIndex = source.ItemInfo.FindIndex(item => item.Name.StartsWith("Current Speed", StringComparison.OrdinalIgnoreCase));
int uIndex = source.ItemInfo.FindIndex(item => item.Name.StartsWith("U velocity", StringComparison.OrdinalIgnoreCase));
int vIndex = source.ItemInfo.FindIndex(item => item.Name.StartsWith("V velocity", StringComparison.OrdinalIgnoreCase));
// Either p and q must be there, or u and v, and either d or s must be there.
bool haspq = (pIndex >= 0 && qIndex >= 0);
bool hasuv = (uIndex >= 0 && vIndex >= 0);
if (!hasuv && !haspq || dIndex < 0 && sIndex < 0)
{
throw new Exception("Could not find items. File must have H-P-Q items, P-Q-Speed or U-V-Speed items");
}
IDfsItemData2D <float> dItem = dIndex >= 0 ? datas[dIndex] : null;
IDfsItemData2D <float> pItem = pIndex >= 0 ? datas[pIndex] : null;
IDfsItemData2D <float> qItem = qIndex >= 0 ? datas[qIndex] : null;
IDfsItemData2D <float> sItem = sIndex >= 0 ? datas[sIndex] : null;
IDfsItemData2D <float> uItem = uIndex >= 0 ? datas[uIndex] : null;
IDfsItemData2D <float> vItem = vIndex >= 0 ? datas[vIndex] : null;
// Spatial 2D axis
IDfsAxisEqD2 axis = (IDfsAxisEqD2)source.SpatialAxis;
double dx = axis.Dx;
double dy = axis.Dy;
// Loop over all time steps
for (int i = 0; i < source.FileInfo.TimeAxis.NumberOfTimeSteps; i++)
{
// Read data for all items from source file. That will also update the depth, p and q.
for (int j = 0; j < source.ItemInfo.Count; j++)
{
source.ReadItemTimeStep(datas[j], i);
}
// For each cell, find maximum speed and store u, v and depth at that point in time.
for (int j = 0; j < numberOfCells; j++)
{
// Skip delete values
if (dItem?.Data[j] == source.FileInfo.DeleteValueFloat ||
sItem?.Data[j] == source.FileInfo.DeleteValueFloat)
{
continue;
}
double p = pItem.Data[j];
double q = qItem.Data[j];
double speed, u, v;
if (sItem != null)
{
// Use speed from result file
speed = sItem.Data[j];
if (hasuv)
{
// Use u and v from result file
u = uItem.Data[j];
v = vItem.Data[j];
}
else // (haspq)
{
// Calculate u and v from speed and direction of p and q
double pqLength = System.Math.Sqrt(p * p + q * q);
u = hasuv ? uItem.Data[j] : speed * p / pqLength;
v = hasuv ? vItem.Data[j] : speed * q / pqLength;
}
}
else // (dItem != null)
{
// Current speed is not directly available in source file, calculate from u and v
if (hasuv)
{
u = uItem.Data[j];
v = vItem.Data[j];
}
else
{
// u and v is not available, calculate fromdh, p and q.
double d = dItem.Data[j];
u = pItem.Data[j] / d;
v = qItem.Data[j] / d;
}
speed = System.Math.Sqrt(u * u + v * v);
}
if (speed > maxSpeed[j])
{
maxSpeed[j] = (float)speed;
uAtMaxSpeed[j] = (float)u;
vAtMaxSpeed[j] = (float)v;
}
}
}
file.WriteItemTimeStepNext(0, maxSpeed);
file.WriteItemTimeStepNext(0, uAtMaxSpeed);
file.WriteItemTimeStepNext(0, vAtMaxSpeed);
//file.WriteItemTimeStepNext(0, maxDepth);
source.Close();
file.Close();
}
/// <summary>
/// Example of how to create a Dfs2 file from scratch. This method
/// creates a copy of the OresundHD.dfs2 test file.
/// <para>
/// Data for static and dynamic item is taken from a source dfs file,
/// which here is the OresundHD.dfs2 test file. The data could come
/// from any other source.
/// </para>
/// </summary>
/// <param name="sourceFilename">Path and name of the OresundHD.dfs2 test file</param>
/// <param name="filename">Path and name of the new file to create</param>
public static void CreateDfs2File(string sourceFilename, string filename)
{
IDfs2File source = DfsFileFactory.Dfs2FileOpen(sourceFilename);
DfsFactory factory = new DfsFactory();
Dfs2Builder builder = Dfs2Builder.Create("", @"C:\Program Files\DHI\2010\bin\nmodel.exe", 0);
// Set up the header
builder.SetDataType(1);
builder.SetGeographicalProjection(factory.CreateProjectionGeoOrigin("UTM-33", 12.438741600559766, 55.225707842436385, 326.99999999999955));
builder.SetTemporalAxis(factory.CreateTemporalEqCalendarAxis(eumUnit.eumUsec, new DateTime(1993, 12, 02, 0, 0, 0), 0, 86400));
builder.SetSpatialAxis(factory.CreateAxisEqD2(eumUnit.eumUmeter, 71, 0, 900, 91, 0, 900));
builder.DeleteValueFloat = -1e-30f;
// Add custom block
// M21_Misc : {orientation (should match projection), drying depth, -900=has projection, land value, 0, 0, 0}
builder.AddCustomBlock(factory.CreateCustomBlock("M21_Misc", new float[] { 327f, 0.2f, -900f, 10f, 0f, 0f, 0f }));
// Set up dynamic items
builder.AddDynamicItem("H Water Depth m", eumQuantity.Create(eumItem.eumIWaterLevel, eumUnit.eumUmeter), DfsSimpleType.Float, DataValueType.Instantaneous);
builder.AddDynamicItem("P Flux m^3/s/m", eumQuantity.Create(eumItem.eumIFlowFlux, eumUnit.eumUm3PerSecPerM), DfsSimpleType.Float, DataValueType.Instantaneous);
builder.AddDynamicItem("Q Flux m^3/s/m", eumQuantity.Create(eumItem.eumIFlowFlux, eumUnit.eumUm3PerSecPerM), DfsSimpleType.Float, DataValueType.Instantaneous);
// Create file
builder.CreateFile(filename);
// Add static items containing bathymetri data, use data from source
IDfsStaticItem sourceStaticItem = source.ReadStaticItemNext();
builder.AddStaticItem("Static item", eumQuantity.UnDefined, sourceStaticItem.Data);
// Get the file
Dfs2File file = builder.GetFile();
// Loop over all time steps
for (int i = 0; i < source.FileInfo.TimeAxis.NumberOfTimeSteps; i++)
{
// Loop over all items
for (int j = 0; j < source.ItemInfo.Count; j++)
{
// Add data for all item-timesteps, copying data from source file.
// Read data from source file
IDfsItemData2D <float> sourceData = (IDfsItemData2D <float>)source.ReadItemTimeStepNext();
// Create empty item data, and copy over data from source
// The IDfsItemData2D can handle 2D indexing, on the form data2D[k,l].
// An ordinary array, float[], can also be used, though indexing from 2D to 1D must be
// handled by user code i.e. using data1D[k + l*xCount] compared to data2D[k,l]
IDfsItemData2D <float> itemData2D = (IDfsItemData2D <float>)file.CreateEmptyItemData(j + 1);
for (int k = 0; k < 71; k++)
{
for (int l = 0; l < 91; l++)
{
itemData2D[k, l] = sourceData[k, l];
}
}
// the itemData2D.Data is a float[], so any float[] of the correct size is valid here.
file.WriteItemTimeStep(j + 1, i, sourceData.Time, itemData2D.Data);
}
}
source.Close();
file.Close();
}
/// <summary>
/// Create DFS2 file with interpolated values from the 3x3 quadrangles,
/// with various delete values applied in each time step.
/// </summary>
/// <param name="centerOnly">Only use center quadrangle</param>
public void DeleteValueVisualDfs2Test(bool centerOnly)
{
DfsFactory factory = new DfsFactory();
Dfs2Builder dfs2Builder = new Dfs2Builder();
dfs2Builder.SetDataType(0);
dfs2Builder.SetTemporalAxis(factory.CreateTemporalEqTimeAxis(eumUnit.eumUsec, 0, 1));
dfs2Builder.SetSpatialAxis(factory.CreateAxisEqD2(eumUnit.eumUmeter, 200, 0, 0.1, 200, 0, 0.1));
dfs2Builder.SetGeographicalProjection(factory.CreateProjectionUndefined());
dfs2Builder.AddDynamicItem("DeleteValueSmooth", eumQuantity.UnDefined, DfsSimpleType.Float, DataValueType.Instantaneous);
dfs2Builder.AddDynamicItem("DeleteValueBox", eumQuantity.UnDefined, DfsSimpleType.Float, DataValueType.Instantaneous);
dfs2Builder.DeleteValueFloat = (float)d;
if (centerOnly)
{
dfs2Builder.CreateFile(UnitTestHelper.TestDataDir + "test_InterpQuadCenter.dfs2");
}
else
{
dfs2Builder.CreateFile(UnitTestHelper.TestDataDir + "test_InterpQuad.dfs2");
}
Dfs2File dfs2File = dfs2Builder.GetFile();
// Calculate interpolation weights
QuadWeights[][] weights = new QuadWeights[200][];
for (int j = 0; j < 200; j++)
{
double y = 5 + 0.1 * j + 0.05;
weights[j] = new QuadWeights[200];
for (int i = 0; i < 200; i++)
{
double x = 5 + 0.1 * i + 0.05;
weights[j][i].Weights = InterpQuadrangle.UndefinedWeights();
for (int jr = 0; jr < 3; jr++)
{
for (int ir = 0; ir < 3; ir++)
{
if (centerOnly && (jr != 1 || ir != 1))
{
continue;
}
double x0 = xcoords[ind(ir, jr)];
double x1 = xcoords[ind(ir + 1, jr)];
double x2 = xcoords[ind(ir + 1, jr + 1)];
double x3 = xcoords[ind(ir, jr + 1)];
double y0 = ycoords[ind(ir, jr)];
double y1 = ycoords[ind(ir + 1, jr)];
double y2 = ycoords[ind(ir + 1, jr + 1)];
double y3 = ycoords[ind(ir, jr + 1)];
if (MeshExtensions.IsPointInsideQuadrangle(x, y, x0, y0, x1, y1, x2, y2, x3, y3))
{
weights[j][i].IR = ir;
weights[j][i].JR = jr;
weights[j][i].Weights = InterpQuadrangle.InterpolationWeights(x, y, x0, y0, x1, y1, x2, y2, x3, y3);
}
}
}
}
}
// Original center quadrangle values
double z0 = zcoords[ind(1, 1)];
double z1 = zcoords[ind(1 + 1, 1)];
double z2 = zcoords[ind(1 + 1, 1 + 1)];
double z3 = zcoords[ind(1, 1 + 1)];
float[] data = new float[200 * 200];
VisualDfs2Data(weights, data, z0, z1, z2, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, z2, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
// One delete value
VisualDfs2Data(weights, data, d, z1, z2, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z1, z2, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, z2, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, z2, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, d, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, d, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, z2, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, z2, d, false); dfs2File.WriteItemTimeStepNext(0, data);
// Two adjacent delete values
VisualDfs2Data(weights, data, d, d, z2, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, z2, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, d, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, d, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, d, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, z1, d, d, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z1, z2, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z1, z2, d, false); dfs2File.WriteItemTimeStepNext(0, data);
// Two diagonal delete values
VisualDfs2Data(weights, data, d, z1, d, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z1, d, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, z2, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, z2, d, false); dfs2File.WriteItemTimeStepNext(0, data);
// Three delete values
VisualDfs2Data(weights, data, d, d, d, z3, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, d, z3, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, z2, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, z2, d, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z1, d, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z1, d, d, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, d, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z0, d, d, d, false); dfs2File.WriteItemTimeStepNext(0, data);
// All delete values
VisualDfs2Data(weights, data, d, d, d, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, d, d, false); dfs2File.WriteItemTimeStepNext(0, data);
dfs2File.Close();
}
/// <summary> Write dfs2 file </summary>
private void Write(string dfsFilename, string projectionString)
{
DfsFactory factory = new DfsFactory();
Dfs2Builder builder = new Dfs2Builder();
// Data type
builder.SetDataType(0);
// Projection and spatial axis
double lon0; double lat0; double dx; double dy;
int flip;
FindAxisProperties(out lon0, out lat0, out dx, out dy, out flip);
builder.SetGeographicalProjection(factory.CreateProjectionGeoOrigin(projectionString, lon0, lat0, 0));
builder.SetSpatialAxis(factory.CreateAxisEqD2(eumUnit.eumUdegree, _dimensions[0], 0, dx, _dimensions[1], 0, dy));
// Time axis
eumUnit timeUnit;
DateTime startDateTime;
double timeStep;
FindTimeProperties(out timeUnit, out startDateTime, out timeStep);
builder.SetTemporalAxis(factory.CreateTemporalEqCalendarAxis(timeUnit, startDateTime, 0, timeStep));
// Add dynamic items
foreach (Variable item in _items)
{
eumQuantity quantity = GetQuantityFromItem(item);
builder.AddDynamicItem(item.Name, quantity, DfsSimpleType.Float, DataValueType.Instantaneous);
}
// Create and get file (no static items there)
builder.CreateFile(dfsFilename);
Dfs2File dfs2File = builder.GetFile();
// Write data to file
int itemSize = _dimensions[0] * _dimensions[1];
float[] values = new float[itemSize];
float[] valuesFlipped = new float[itemSize];
for (int i = 0; i < _time.Array.Length; i++)
{
for (int j = 0; j < _items.Count; j++)
{
// Time of time step
double time = (double)_time.Array.GetValue(i);
// Values for all time steps
float[] allfloats = (float[])_items[j].Array;
// Copy single time step data from allFloats to values
Array.Copy(allfloats, i * itemSize, values, 0, itemSize);
// Flip values, if necessary
float[] actual;
if (flip == 0)
{
actual = values;
}
else
{
PerformFlip(flip, values, valuesFlipped);
actual = valuesFlipped;
}
// Save values to file
dfs2File.WriteItemTimeStepNext(time, actual);
}
}
dfs2File.Close();
}
/// <summary>
/// Create DFS2 file with iterpolated values from the 3x3 quadrangles,
/// with various delete values applied in each time step.
/// </summary>
public void DeleteValueVisualDfs2DoTest()
{
string meshFileName = UnitTestHelper.TestDataDir + "small.mesh";
MeshFile file = MeshFile.ReadMesh(meshFileName);
_meshVisual = file.ToSMeshData();
DfsFactory factory = new DfsFactory();
Dfs2Builder dfs2Builder = new Dfs2Builder();
dfs2Builder.SetDataType(0);
dfs2Builder.SetTemporalAxis(factory.CreateTemporalEqTimeAxis(eumUnit.eumUsec, 0, 1));
dfs2Builder.SetSpatialAxis(factory.CreateAxisEqD2(eumUnit.eumUmeter, 80, 0, 0.01, 80, 0, 0.01));
dfs2Builder.SetGeographicalProjection(factory.CreateProjectionUndefined());
dfs2Builder.AddDynamicItem("DeleteValueSmooth", eumQuantity.UnDefined, DfsSimpleType.Float, DataValueType.Instantaneous);
dfs2Builder.AddDynamicItem("DeleteValueBox", eumQuantity.UnDefined, DfsSimpleType.Float, DataValueType.Instantaneous);
dfs2Builder.DeleteValueFloat = (float)d;
dfs2Builder.CreateFile(UnitTestHelper.TestDataDir + "test_InterpTri.dfs2");
Dfs2File dfs2File = dfs2Builder.GetFile();
// Calculate interpolation weights
MeshWeights[][] weights = new MeshWeights[80][];
for (int j = 0; j < 80; j++)
{
double y = 0.2 + 0.01 * j + 0.005;
weights[j] = new MeshWeights[80];
for (int i = 0; i < 80; i++)
{
double x = 0.4 + 0.01 * i + 0.005;
weights[j][i].QuadWeights = InterpQuadrangle.UndefinedWeights();
weights[j][i].TriWeights = InterpTriangle.UndefinedWeights();
for (int ielmt = 0; ielmt < _meshVisual.NumberOfElements; ielmt++)
{
var elmtNodes = _meshVisual.ElementTable[ielmt];
if (elmtNodes.Length == 4)
{
double x0 = _meshVisual.X[elmtNodes[0]];
double x1 = _meshVisual.X[elmtNodes[1]];
double x2 = _meshVisual.X[elmtNodes[2]];
double x3 = _meshVisual.X[elmtNodes[3]];
double y0 = _meshVisual.Y[elmtNodes[0]];
double y1 = _meshVisual.Y[elmtNodes[1]];
double y2 = _meshVisual.Y[elmtNodes[2]];
double y3 = _meshVisual.Y[elmtNodes[3]];
if (MeshExtensions.IsPointInsideQuadrangle(x, y, x0, y0, x1, y1, x2, y2, x3, y3))
{
weights[j][i].ElmtIndex = ielmt;
weights[j][i].QuadWeights = InterpQuadrangle.InterpolationWeights(x, y, x0, y0, x1, y1, x2, y2, x3, y3);
}
}
else
{
double x0 = _meshVisual.X[elmtNodes[0]];
double x1 = _meshVisual.X[elmtNodes[1]];
double x2 = _meshVisual.X[elmtNodes[2]];
double y0 = _meshVisual.Y[elmtNodes[0]];
double y1 = _meshVisual.Y[elmtNodes[1]];
double y2 = _meshVisual.Y[elmtNodes[2]];
if (MeshExtensions.IsPointInsideTriangle(x, y, x0, y0, x1, y1, x2, y2))
{
weights[j][i].ElmtIndex = ielmt;
weights[j][i].TriWeights = InterpTriangle.InterpolationWeights(x, y, x0, y0, x1, y1, x2, y2);
}
}
}
}
}
// Original center quadrangle values
double z4 = _meshVisual.Z[3];
double z6 = _meshVisual.Z[5];
double z8 = _meshVisual.Z[7];
float[] data = new float[80 * 80];
VisualDfs2Data(weights, data, z4, z6, z8, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, z6, z8, false); dfs2File.WriteItemTimeStepNext(0, data);
// One delete value
VisualDfs2Data(weights, data, d, z6, z8, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z6, z8, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, d, z8, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, d, z8, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, z6, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, z6, d, false); dfs2File.WriteItemTimeStepNext(0, data);
// Two adjacent delete values
VisualDfs2Data(weights, data, d, d, z8, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, z8, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, d, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, z4, d, d, false); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z6, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, z6, d, false); dfs2File.WriteItemTimeStepNext(0, data);
// All delete values
VisualDfs2Data(weights, data, d, d, d, true); dfs2File.WriteItemTimeStepNext(0, data);
VisualDfs2Data(weights, data, d, d, d, false); dfs2File.WriteItemTimeStepNext(0, data);
dfs2File.Close();
}
/// <summary>
/// Create dfsu and mesh file from dfs2 file.
/// <para>
/// Note 1: Boundary code is set to land value at
/// all boundaries of mesh and dfsu file.
/// These must be updated to something "better"
/// if to use as input in another simulation.
/// </para>
/// <para>
/// Note 2: P and Q values are not rotated with the
/// grid, but should be so, if used in the
/// projected coordinate system. It must take
/// the 327 degrees rotation into account.
/// </para>
/// </summary>
/// <param name="dfs2Filename">Name of input dfs2 file, e.g. the OresundHD.dfs2</param>
/// <param name="meshFilename">Name of output mesh file</param>
/// <param name="dfsuFilename">Name of output dfsu file</param>
public static void CreateDfsuFromDfs2(string dfs2Filename, string meshFilename, string dfsuFilename)
{
// Open file
Dfs2File dfs2 = DfsFileFactory.Dfs2FileOpen(dfs2Filename);
// Read bathymetry from first static item
IDfsStaticItem bathymetryItem = dfs2.ReadStaticItemNext();
float[] bathymetry = (float[])bathymetryItem.Data;
// Extract spatial axis
IDfsAxisEqD2 spatialAxis = (IDfsAxisEqD2)dfs2.SpatialAxis;
// Some convenience variables
double dx = spatialAxis.Dx;
double dy = spatialAxis.Dy;
double x0 = spatialAxis.X0;
double y0 = spatialAxis.Y0;
int xCount = spatialAxis.XCount;
int yCount = spatialAxis.YCount;
// First custom block (index 0) contains the M21_MISC values,
// where the 4th (index 3) is the land value
float landValue = (float)dfs2.FileInfo.CustomBlocks[0][3];
//-----------------------------------------
// Find out which elements in the dfs2 grid that is not a land value
// and include all those elements and their surrounding nodes in mesh
// Arrays indicating if element and node in grid is used or not in mesh
bool[,] elmts = new bool[xCount, yCount];
int[,] nodes = new int[xCount + 1, yCount + 1];
// Loop over all elements in 2D grid
for (int l = 0; l < yCount; l++)
{
for (int k = 0; k < xCount; k++)
{
// If bathymetry is not land value, use element.
if (bathymetry[k + l * xCount] != landValue)
{
// element [l,k] is used, and also the 4 nodes around it
elmts[k, l] = true;
nodes[k, l] = 1;
nodes[k + 1, l] = 1;
nodes[k, l + 1] = 1;
nodes[k + 1, l + 1] = 1;
}
}
}
//-----------------------------------------
// Create new mest nodes
// Cartography object can convert grid (x,y) to projection (east,north)
IDfsProjection proj = dfs2.FileInfo.Projection;
DHI.Projections.Cartography cart = new DHI.Projections.Cartography(proj.WKTString, proj.Longitude, proj.Latitude, proj.Orientation);
// New mesh nodes
List <double> X = new List <double>();
List <double> Y = new List <double>();
List <float> Zf = new List <float>(); // float values for dfsu file
List <double> Zd = new List <double>(); // double values for mesh file
List <int> Code = new List <int>();
// Loop over all nodes
int nodesCount = 0;
for (int l = 0; l < yCount + 1; l++)
{
for (int k = 0; k < xCount + 1; k++)
{
// Check if node is included in mesh
if (nodes[k, l] > 0)
{
// Convert from mesh (x,y) to projection (east,north)
double east, north;
cart.Xy2Proj((k - 0.5) * dx + x0, (l - 0.5) * dy + y0, out east, out north);
// Average Z on node from neighbouring grid cell values, cell value is used
// unless they are outside grid or has land values
double z = 0;
int zCount = 0;
if (k > 0 && l > 0 && bathymetry[k - 1 + (l - 1) * xCount] != landValue)
{
zCount++; z += bathymetry[k - 1 + (l - 1) * xCount];
}
if (k < xCount && l > 0 && bathymetry[k + (l - 1) * xCount] != landValue)
{
zCount++; z += bathymetry[k + (l - 1) * xCount];
}
if (k > 0 && l < yCount && bathymetry[k - 1 + (l) * xCount] != landValue)
{
zCount++; z += bathymetry[k - 1 + (l) * xCount];
}
if (k < xCount && l < yCount && bathymetry[k + (l) * xCount] != landValue)
{
zCount++; z += bathymetry[k + (l) * xCount];
}
if (zCount > 0)
{
z /= zCount;
}
else
{
z = landValue;
}
// Store new node number and add node
nodesCount++;
nodes[k, l] = nodesCount; // this is the node number to use in the element table
X.Add(east);
Y.Add(north);
Zf.Add((float)z);
Zd.Add(z);
Code.Add(zCount == 4 ? 0 : 1); // Land boundary if zCount < 4
}
}
}
// New mesh elements
List <int[]> elmttable2 = new List <int[]>();
for (int l = 0; l < yCount; l++)
{
for (int k = 0; k < xCount; k++)
{
// Check if element is included in mesh
if (elmts[k, l])
{
// For this element, add the four surrounding nodes,
// counter-clockwise order
int[] newNodes = new int[4];
newNodes[0] = nodes[k, l];
newNodes[1] = nodes[k + 1, l];
newNodes[2] = nodes[k + 1, l + 1];
newNodes[3] = nodes[k, l + 1];
elmttable2.Add(newNodes);
}
}
}
//-----------------------------------------
// Create mesh
{
// Create 2D dfsu file
MeshBuilder builder = new MeshBuilder();
// Setup header and geometry
builder.SetNodes(X.ToArray(), Y.ToArray(), Zd.ToArray(), Code.ToArray());
builder.SetElements(elmttable2.ToArray());
builder.SetProjection(dfs2.FileInfo.Projection);
// Create new file
MeshFile mesh = builder.CreateMesh();
mesh.Write(meshFilename);
}
//-----------------------------------------
// Create dfsu file
{
// dfs2 time axis
IDfsEqCalendarAxis timeAxis = (IDfsEqCalendarAxis)dfs2.FileInfo.TimeAxis;
// Create 2D dfsu file
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
// Setup header and geometry
builder.SetNodes(X.ToArray(), Y.ToArray(), Zf.ToArray(), Code.ToArray());
builder.SetElements(elmttable2.ToArray());
builder.SetProjection(dfs2.FileInfo.Projection);
builder.SetTimeInfo(timeAxis.StartDateTime, timeAxis.TimeStepInSeconds());
builder.SetZUnit(eumUnit.eumUmeter);
// Add dynamic items, copying from dfs2 file
for (int i = 0; i < dfs2.ItemInfo.Count; i++)
{
IDfsSimpleDynamicItemInfo itemInfo = dfs2.ItemInfo[i];
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
// Create new file
DfsuFile dfsu = builder.CreateFile(dfsuFilename);
// Add dfs2 data to dfsu file
float[] dfsuData = new float[dfsu.NumberOfElements];
for (int i = 0; i < dfs2.FileInfo.TimeAxis.NumberOfTimeSteps; i++)
{
for (int j = 0; j < dfs2.ItemInfo.Count; j++)
{
// Read dfs2 grid data
IDfsItemData2D <float> itemData = (IDfsItemData2D <float>)dfs2.ReadItemTimeStep(j + 1, i);
// Extract 2D grid data to dfsu data array
int lk = 0;
for (int l = 0; l < yCount; l++)
{
for (int k = 0; k < xCount; k++)
{
if (elmts[k, l])
{
dfsuData[lk++] = itemData[k, l];
}
}
}
// write data
dfsu.WriteItemTimeStepNext(itemData.Time, dfsuData);
}
}
dfsu.Close();
}
dfs2.Close();
}