/// <summary>
/// Example of how to create a Dfsu file from scratch. This method
/// creates a copy of the OresundHD.dfsu test file.
/// <para>
/// Data for static and dynamic item is taken from a source dfs file,
/// which here is the OresundHD.dfsu test file. The data could come
/// from any other source.
/// </para>
/// </summary>
/// <param name="sourceFilename">Path and name of the OresundHD.dfsu test file</param>
/// <param name="filename">Path and name of the new file to create</param>
/// <param name="zInMeters">Flag specifying whether the z values are in meters or feet </param>
public static void CreateDfsuFile(string sourceFilename, string filename, bool zInMeters)
{
IDfsuFile source = DfsuFile.Open(sourceFilename);
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
// Setup header and geometry, copy from source file
builder.SetNodes(source.X, source.Y, source.Z, source.Code);
builder.SetElements(source.ElementTable);
builder.SetProjection(source.Projection);
builder.SetTimeInfo(source.StartDateTime, source.TimeStepInSeconds);
if (zInMeters)
{
builder.SetZUnit(eumUnit.eumUmeter);
}
else
{
builder.SetZUnit(eumUnit.eumUfeet);
}
// Add dynamic items, copying from source
foreach (DfsuDynamicItemInfo itemInfo in source.ItemInfo)
{
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
DfsuFile file = builder.CreateFile(filename);
// Add data for all item-timesteps, copying from source
IDfsItemData sourceData;
while (null != (sourceData = source.ReadItemTimeStepNext()))
{
file.WriteItemTimeStepNext(sourceData.Time, sourceData.Data);
}
source.Close();
file.Close();
}
/// <summary>
/// Interpolate values from <paramref name="sourceFilename"/> to mesh
/// defined by <paramref name="targetMeshFilename"/>, and store it in
/// <paramref name="targetFilename"/>
/// </summary>
/// <param name="sourceFilename">Source data for interpolation</param>
/// <param name="targetMeshFilename">Target mesh to interpolate to. Can be a mesh or dfsu file</param>
/// <param name="targetFilename">File to store interpolated data to</param>
public static void Interpolate(string sourceFilename, string targetMeshFilename, string targetFilename)
{
System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();
watch.Start();
DfsuFile sourceDfsu = DfsFileFactory.DfsuFileOpen(sourceFilename);
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
DfsuBuildGeometry(targetMeshFilename, builder);
builder.SetTimeInfo(sourceDfsu.StartDateTime, sourceDfsu.TimeStepInSeconds);
// Add dynamic items, copying from source
foreach (IDfsSimpleDynamicItemInfo itemInfo in sourceDfsu.ItemInfo)
{
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
DfsuFile targetDfsu = builder.CreateFile(targetFilename);
watch.Stop();
Console.Out.WriteLine("Create File : " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
SMeshData sourceMesh = Create(sourceDfsu);
SMeshData targetMesh = Create(targetDfsu);
sourceMesh.BuildDerivedData();
watch.Stop();
Console.Out.WriteLine("Build mesh : " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
MeshInterpolator2D interpolator = new MeshInterpolator2D(sourceMesh, MeshValueType.Elements)
{
DeleteValue = sourceDfsu.DeleteValueFloat,
DeleteValueFloat = sourceDfsu.DeleteValueFloat,
//AllowExtrapolation = true,
};
interpolator.SetTarget(targetMesh, MeshValueType.Elements);
watch.Stop();
Console.Out.WriteLine("Interpolator: " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
// Temporary, interpolated target-data
float[] targetData = new float[targetDfsu.NumberOfElements];
// Add data for all item-timesteps, copying from source, interpolating
IDfsItemData <float> sourceData;
while (null != (sourceData = sourceDfsu.ReadItemTimeStepNext() as IDfsItemData <float>))
{
interpolator.InterpolateElmtToTarget(sourceData.Data, targetData);
targetDfsu.WriteItemTimeStepNext(sourceData.Time, targetData);
}
watch.Stop();
Console.Out.WriteLine("Interpolate : " + watch.Elapsed.TotalSeconds);
watch.Reset();
sourceDfsu.Close();
targetDfsu.Close();
}
/// <summary>
/// Create a difference file between <paramref name="referenceFilename"/>
/// and <paramref name="compareFilename"/>, and store it in
/// <paramref name="diffFilename"/>.
/// The compare-file data is interpolated to the reference-file mesh, if
/// meshes does not match.
/// </summary>
/// <param name="referenceFilename">Reference data for comparison</param>
/// <param name="compareFilename">Comparison data</param>
/// <param name="diffFilename">File to store difference data to</param>
/// <param name="deleteValueDiff">If set to true, comparing delete value to non-delete value will return the non-delete value</param>
public static void DfsuDiff(string referenceFilename, string compareFilename, string diffFilename, bool deleteValueDiff = true)
{
System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();
watch.Start();
// Open reference file and comparison file
DfsuFile refdfsu = DfsFileFactory.DfsuFileOpen(referenceFilename);
DfsuFile comdfsu = DfsFileFactory.DfsuFileOpen(compareFilename);
float refDeleteValueFloat = refdfsu.DeleteValueFloat;
float comDeleteValueFloat = comdfsu.DeleteValueFloat;
// Create diff file, matching reference file.
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
// Setup header and geometry, copy from source file
builder.SetNodes(refdfsu.X, refdfsu.Y, refdfsu.Z, refdfsu.Code);
builder.SetElements(refdfsu.ElementTable);
builder.SetProjection(refdfsu.Projection);
builder.SetZUnit(refdfsu.ZUnit);
builder.SetTimeInfo(refdfsu.StartDateTime, refdfsu.TimeStepInSeconds);
// Add dynamic items, copying from source
foreach (IDfsSimpleDynamicItemInfo itemInfo in refdfsu.ItemInfo)
{
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
DfsuFile diffDfsu = builder.CreateFile(diffFilename);
watch.Stop();
Console.Out.WriteLine("Create File : " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
// Build up mesh structures for interpolation
SMeshData refMesh = SCreate(refdfsu);
SMeshData comMesh = SCreate(comdfsu);
watch.Stop();
Console.Out.WriteLine("Create mesh : " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
bool meshEquals = refMesh.EqualsGeometry(comMesh);
if (!meshEquals)
{
comMesh.BuildDerivedData();
}
watch.Stop();
Console.Out.WriteLine("Build Deriv : " + watch.Elapsed.TotalSeconds);
watch.Reset();
MeshInterpolator2D interpolator = null;
float[] targetData = null;
// Do not interpolate if meshes equals
if (!meshEquals)
{
watch.Start();
// Build up interpolatin structures
interpolator = new MeshInterpolator2D(comMesh, MeshValueType.Elements)
{
DeleteValue = comdfsu.DeleteValueFloat,
DeleteValueFloat = comdfsu.DeleteValueFloat,
//AllowExtrapolation = true,
};
interpolator.SetTarget(refMesh, MeshValueType.Elements);
// Temporary, interpolated compare-data
targetData = new float[diffDfsu.NumberOfElements];
watch.Stop();
Console.Out.WriteLine("Interpolator: " + watch.Elapsed.TotalSeconds);
watch.Reset();
}
watch.Start();
// Loop over all time steps
IDfsItemData <float> refData;
IDfsItemData <float> comData;
while (null != (refData = refdfsu.ReadItemTimeStepNext() as IDfsItemData <float>) &&
null != (comData = comdfsu.ReadItemTimeStepNext() as IDfsItemData <float>))
{
if (interpolator != null)
{
interpolator.InterpolateElmtToTarget(comData.Data, targetData);
}
else
{
targetData = comData.Data;
}
for (int i = 0; i < targetData.Length; i++)
{
// ReSharper disable CompareOfFloatsByEqualityOperator
if (refData.Data[i] != refDeleteValueFloat &&
targetData[i] != comDeleteValueFloat)
{
targetData[i] = refData.Data[i] - targetData[i];
}
else if (refData.Data[i] == refDeleteValueFloat &&
targetData[i] == comDeleteValueFloat)
{
targetData[i] = refDeleteValueFloat;
}
else if (deleteValueDiff)
{
if (refData.Data[i] != refDeleteValueFloat)
{
targetData[i] = refData.Data[i];
}
else // (targetData[i] != comDeleteValueFloat)
{
targetData[i] = -targetData[i];
}
}
else
{
targetData[i] = refDeleteValueFloat;
}
// ReSharper restore CompareOfFloatsByEqualityOperator
}
diffDfsu.WriteItemTimeStepNext(refData.Time, targetData);
}
watch.Stop();
Console.Out.WriteLine("Interpolate : " + watch.Elapsed.TotalSeconds);
watch.Reset();
refdfsu.Close();
comdfsu.Close();
diffDfsu.Close();
}
/// <summary>
/// Create a difference file between <paramref name="referenceFilename"/>
/// and <paramref name="compareFilename"/>, and store it in
/// <paramref name="diffFilename"/>.
/// The compare-file data is interpolated to the reference-file mesh, if
/// meshes does not match.
/// </summary>
/// <param name="referenceFilename">Reference data for comparison</param>
/// <param name="compareFilename">Comparison data</param>
/// <param name="diffFilename">File to store difference data to</param>
public static void DfsuDiff(string referenceFilename, string compareFilename, string diffFilename)
{
System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();
watch.Start();
// Open reference file and comparison file
DfsuFile refdfsu = DfsFileFactory.DfsuFileOpen(referenceFilename);
DfsuFile comdfsu = DfsFileFactory.DfsuFileOpen(compareFilename);
float deleteValueFloat = refdfsu.DeleteValueFloat;
// Create diff file, matching reference file.
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
// Setup header and geometry, copy from source file
builder.SetNodes(refdfsu.X, refdfsu.Y, refdfsu.Z, refdfsu.Code);
builder.SetElements(refdfsu.ElementTable);
builder.SetProjection(refdfsu.Projection);
builder.SetZUnit(refdfsu.ZUnit);
builder.SetTimeInfo(refdfsu.StartDateTime, refdfsu.TimeStepInSeconds);
// Add dynamic items, copying from source
foreach (DfsuDynamicItemInfo itemInfo in refdfsu.ItemInfo)
{
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
DfsuFile diffDfsu = builder.CreateFile(diffFilename);
watch.Stop();
Console.Out.WriteLine("Create File : " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
// Build up mesh structures for interpolation
MeshData sourceMesh = Create(refdfsu);
MeshData targetMesh = Create(diffDfsu);
sourceMesh.BuildDerivedData();
watch.Stop();
Console.Out.WriteLine("Build mesh : " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
// Build up interpolatin structures
MeshInterpolator2D interpolator = new MeshInterpolator2D(sourceMesh)
{
DeleteValue = refdfsu.DeleteValueFloat,
DeleteValueFloat = refdfsu.DeleteValueFloat,
};
interpolator.SetTarget(targetMesh);
watch.Stop();
Console.Out.WriteLine("Interpolator: " + watch.Elapsed.TotalSeconds);
watch.Reset();
watch.Start();
// Temporary, interpolated compare-data
float[] targetData = new float[diffDfsu.NumberOfElements];
// Loop over all time steps
IDfsItemData <float> refData;
IDfsItemData <float> comData;
while (null != (refData = refdfsu.ReadItemTimeStepNext() as IDfsItemData <float>) &&
null != (comData = comdfsu.ReadItemTimeStepNext() as IDfsItemData <float>))
{
interpolator.InterpolateToTarget(comData.Data, targetData);
for (int i = 0; i < targetData.Length; i++)
{
if (refData.Data[i] != deleteValueFloat &&
targetData[i] != deleteValueFloat)
{
targetData[i] = refData.Data[i] - targetData[i];
}
else
{
targetData[i] = deleteValueFloat;
}
}
diffDfsu.WriteItemTimeStepNext(refData.Time, targetData);
}
watch.Stop();
Console.Out.WriteLine("Interpolate : " + watch.Elapsed.TotalSeconds);
watch.Reset();
refdfsu.Close();
comdfsu.Close();
diffDfsu.Close();
}
private void ComputeHmax(string filename)
{
btStart.Enabled = false; //Disable the Start button, to prevent user from running the tool twice at the same time
btClose.Enabled = false; //Disable the Close button, to prevent user from closing the tool while running
//Read input file and find relevant items
IDfsuFile InputFile = DfsuFile.Open(filename); //Open the file
int ItemNb = InputFile.ItemInfo.Count; //Number of items in the file
int ItemNbH = -1; //Stores the item number for water depth. Initialised with a temporary value.
int ItemNbU = -1; //Stores the item number for U velocity. Initialised with a temporary value.
int ItemNbV = -1; //Stores the item number for V velocity. Initialised with a temporary value.
for (int i = 0; i < ItemNb; i++) //Loop finding appropriate items H, U and V
{
if (InputFile.ItemInfo[i].Name == "Total water depth")
{
ItemNbH = i; //Save the actual item number when Total water depth is found
}
if (InputFile.ItemInfo[i].Name == "U velocity")
{
ItemNbU = i; //Save the actual item number when U velocity is found
}
if (InputFile.ItemInfo[i].Name == "V velocity")
{
ItemNbV = i; //Save the actual item number when V velocity is found
}
}
if (ItemNbH == -1 || ItemNbU == -1 || ItemNbV == -1) //If one of the required item cannot be found
{
btClose.Enabled = true; //Enable the Close button again
throw new Exception("The result file doesn't contain the necessary items H, U and V"); //Throw error message
}
else
{
//Create output file, with same nodes, elements, projection and time info as the input file, but with different output items
DfsuBuilder OutputBuilder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
OutputBuilder.SetNodes(InputFile.X, InputFile.Y, InputFile.Z, InputFile.Code);
OutputBuilder.SetElements(InputFile.ElementTable);
OutputBuilder.SetProjection(InputFile.Projection);
OutputBuilder.SetTimeInfo(InputFile.StartDateTime, InputFile.TimeStepInSeconds);
OutputBuilder.SetZUnit(InputFile.ZUnit);
OutputBuilder.AddDynamicItem("Maximum water depth", InputFile.ItemInfo[ItemNbH].Quantity); //Create item H
OutputBuilder.AddDynamicItem("U velocity @ max. depth", InputFile.ItemInfo[ItemNbU].Quantity); //Create item U
OutputBuilder.AddDynamicItem("V velocity @ max. depth", InputFile.ItemInfo[ItemNbV].Quantity); //Create item V
OutputBuilder.AddDynamicItem("Current speed @ max. depth", InputFile.ItemInfo[ItemNbU].Quantity); //Create item Speed
OutputBuilder.AddDynamicItem("Current direction @ max. depth", eumQuantity.Create(eumItem.eumICurrentDirection, eumUnit.eumUradian)); //Create item Direction. Note: eumQuantity requires "using DHI.Generic.MikeZero"
//Initialization of all output variables. Both source data and output data are intialized with data from first time step of the input file.
float[] SourceDataH = (float[])InputFile.ReadItemTimeStep(ItemNbH + 1, 0).Data; //ReadItemTimeStep is 1-based! That is, the first time step must be numbered 1, whereas the first time step in the file is numbered 0, hence the +1.
float[] SourceDataU = (float[])InputFile.ReadItemTimeStep(ItemNbU + 1, 0).Data;
float[] SourceDataV = (float[])InputFile.ReadItemTimeStep(ItemNbV + 1, 0).Data;
float[] OutputDataH = (float[])InputFile.ReadItemTimeStep(ItemNbH + 1, 0).Data;
float[] OutputDataU = (float[])InputFile.ReadItemTimeStep(ItemNbU + 1, 0).Data;
float[] OutputDataV = (float[])InputFile.ReadItemTimeStep(ItemNbV + 1, 0).Data;
float[] OutputDataSpeed = (float[])InputFile.ReadItemTimeStep(ItemNbU + 1, 0).Data; //Initialise speed with values of U at time step 0
float[] OutputDataDir = (float[])InputFile.ReadItemTimeStep(ItemNbU + 1, 0).Data; //Initialise direction with values of U at time step 0
for (int m = 0; m < InputFile.NumberOfElements; m++) //Change speed and direction at first time step based on U and V values, with a loop over each element
{
OutputDataSpeed[m] = (float)Math.Sqrt(Math.Pow(SourceDataU[m], 2) + Math.Pow(SourceDataV[m], 2));
OutputDataDir[m] = (float)Math.Atan2(SourceDataU[m], SourceDataV[m]);
}
//Define the properties of the progress bar
progressBar1.Maximum = InputFile.NumberOfTimeSteps - 1;
progressBar1.Step = 1;
//Loop over all time steps to get results for maxH (starting from 2nd time step)
for (int j = 1; j < InputFile.NumberOfTimeSteps; j++)
{
SourceDataH = (float[])InputFile.ReadItemTimeStep(ItemNbH + 1, j).Data; //Load the new time step H data into the SourceDataH array. ReadItemTimeStep is 1-based!
SourceDataU = (float[])InputFile.ReadItemTimeStep(ItemNbU + 1, j).Data; //Load the new time step U data into the SourceDataU array. ReadItemTimeStep is 1-based!
SourceDataV = (float[])InputFile.ReadItemTimeStep(ItemNbV + 1, j).Data; //Load the new time step V data into the SourceDataV array. ReadItemTimeStep is 1-based!
for (int k = 0; k < InputFile.NumberOfElements; k++) //Loop over all elements
{
if (SourceDataH[k] > OutputDataH[k]) //If the water depth for the new time step is higher than the previous maximum depth, then store the corresponding U, V, speed and direction values
{
OutputDataH[k] = SourceDataH[k];
OutputDataU[k] = SourceDataU[k];
OutputDataV[k] = SourceDataV[k];
OutputDataSpeed[k] = (float)Math.Sqrt(Math.Pow(SourceDataU[k], 2) + Math.Pow(SourceDataV[k], 2));
OutputDataDir[k] = (float)Math.Atan2(SourceDataU[k], SourceDataV[k]);
}
}
progressBar1.PerformStep(); //Increment progress bar
}
// Write results
string folder = Path.GetDirectoryName(txtPath.Text);
string FileRoot = Path.GetFileNameWithoutExtension(txtPath.Text);
string FileNameOut = folder + "\\" + FileRoot + "_Statistics_Hmax.dfsu"; //Add suffix to input file name, to be used for output file
DfsuFile OutputFile = OutputBuilder.CreateFile(FileNameOut); //Create output file
OutputFile.WriteItemTimeStepNext(0, OutputDataH); //Write H data. Time set to 0 : ignored since equidistant interval
OutputFile.WriteItemTimeStepNext(0, OutputDataU); //Write U data
OutputFile.WriteItemTimeStepNext(0, OutputDataV); //Write V data
OutputFile.WriteItemTimeStepNext(0, OutputDataSpeed); //Write speed data
OutputFile.WriteItemTimeStepNext(0, OutputDataDir); //Write direction data
InputFile.Close(); //Release the input file
OutputFile.Close(); //Release the output file
MessageBox.Show("File created"); //Confirm that the file has been created
progressBar1.Value = 0; //Reset the progress bar
btStart.Enabled = true; //Enable the Start button again
btClose.Enabled = true; //Enable the Close button again
}
}
/// <summary>
/// Extract sub-area of dfsu (2D) file to a new dfsu file
/// </summary>
/// <param name="sourceFilename">Name of source file, i.e. OresundHD.dfsu test file</param>
/// <param name="outputFilename">Name of output file</param>
/// <param name="x1">Lower left x coordinate of sub area</param>
/// <param name="y1">Lower left y coordinate of sub area</param>
/// <param name="x2">upper right x coordinate of sub area</param>
/// <param name="y2">upper right y coordinate of sub area</param>
public static void ExtractSubareaDfsu2D(string sourceFilename, string outputFilename, double x1, double y1, double x2, double y2)
{
DfsuFile dfsu = DfsFileFactory.DfsuFileOpen(sourceFilename);
// Node coordinates
double[] X = dfsu.X;
double[] Y = dfsu.Y;
float[] Z = dfsu.Z;
int[] Code = dfsu.Code;
// Loop over all elements, and all its nodes: If one node is inside
// region, element (and nodes) are to be included in new mesh
List <int> elmtsIncluded = new List <int>();
bool[] nodesIncluded = new bool[dfsu.NumberOfNodes];
for (int i = 0; i < dfsu.NumberOfElements; i++)
{
// Nodes of element
int[] nodes = dfsu.ElementTable[i];
// Check if one of the nodes of the element is inside region
bool elmtIncluded = false;
for (int j = 0; j < nodes.Length; j++)
{
int node = nodes[j] - 1;
if (x1 <= X[node] && X[node] <= x2 && y1 <= Y[node] && Y[node] <= y2)
{
elmtIncluded = true;
}
}
if (elmtIncluded)
{
// Add element to list of included elements
elmtsIncluded.Add(i);
// Mark all nodes of element as included
for (int j = 0; j < nodes.Length; j++)
{
int node = nodes[j] - 1;
nodesIncluded[node] = true;
}
}
}
// array containing numbers of existing nodes in new mesh (indices)
int[] renumber = new int[dfsu.NumberOfNodes];
// new mesh nodes
List <double> X2 = new List <double>();
List <double> Y2 = new List <double>();
List <float> Z2 = new List <float>();
List <int> Code2 = new List <int>();
List <int> nodeIds = new List <int>();
int i2 = 0;
for (int i = 0; i < dfsu.NumberOfNodes; i++)
{
if (nodesIncluded[i])
{
X2.Add(X[i]);
Y2.Add(Y[i]);
Z2.Add(Z[i]);
Code2.Add(Code[i]);
nodeIds.Add(dfsu.NodeIds[i]);
// Node with index i will get index i2 in new mesh
renumber[i] = i2;
i2++;
}
}
// New mesh elements
List <int[]> elmttable2 = new List <int[]>();
List <int> elmtIds = new List <int>();
for (int i = 0; i < elmtsIncluded.Count; i++)
{
// Add new element
int elmt = elmtsIncluded[i];
int[] nodes = dfsu.ElementTable[elmt];
// newNodes must be renumbered
int[] newNodes = new int[nodes.Length];
for (int j = 0; j < nodes.Length; j++)
{
// Do the renumbering of nodes from existing mesh to new mesh
newNodes[j] = renumber[nodes[j] - 1] + 1;
}
elmttable2.Add(newNodes);
elmtIds.Add(dfsu.ElementIds[i]);
}
// Create 2D dfsu file
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
// Setup header and geometry
builder.SetNodes(X2.ToArray(), Y2.ToArray(), Z2.ToArray(), Code2.ToArray());
//builder.SetNodeIds(nodeIds.ToArray());
builder.SetElements(elmttable2.ToArray());
builder.SetElementIds(elmtIds.ToArray()); // retain original element id's
builder.SetProjection(dfsu.Projection);
builder.SetTimeInfo(dfsu.StartDateTime, dfsu.TimeStepInSeconds);
if (dfsu.ZUnit == eumUnit.eumUUnitUndefined)
{
builder.SetZUnit(eumUnit.eumUmeter);
}
else
{
builder.SetZUnit(dfsu.ZUnit);
}
// Add dynamic items, copying from source
for (int i = 0; i < dfsu.ItemInfo.Count; i++)
{
IDfsSimpleDynamicItemInfo itemInfo = dfsu.ItemInfo[i];
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
// Create new file
DfsuFile dfsuOut = builder.CreateFile(outputFilename);
// Add new data
float[] data2 = new float[elmtsIncluded.Count];
for (int i = 0; i < dfsu.NumberOfTimeSteps; i++)
{
for (int j = 0; j < dfsu.ItemInfo.Count; j++)
{
// Read data from existing dfsu
IDfsItemData <float> itemData = (IDfsItemData <float>)dfsu.ReadItemTimeStep(j + 1, i);
// Extract value for elements in new mesh
for (int k = 0; k < elmtsIncluded.Count; k++)
{
data2[k] = itemData.Data[elmtsIncluded[k]];
}
// write data
dfsuOut.WriteItemTimeStepNext(itemData.Time, data2);
}
}
dfsuOut.Close();
dfsu.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();
}
/// <summary>
/// Extract a single layer from a 3D dfsu file, and write it to a 2D dfsu file.
/// <para>
/// If a layer value does not exist for a certain 2D element, delete value is written
/// to the 2D resut file. This is relevant for Sigma-Z type of files.
/// </para>
/// </summary>
/// <param name="filenameDfsu3">Name of 3D dfsu source file</param>
/// <param name="filenameDfsu2">Name of 2D dfsu result file</param>
/// <param name="layerNumber">Layer to extract.
/// <para>
/// Positive values count from bottom up i.e. 1 is bottom layer, 2 is second layer from bottom etc.
/// </para>
/// <para>
/// Negative values count from top down, i.e. -1 is toplayer, -2 is second layer from top etc.
/// </para>
/// </param>
public static void ExtractDfsu2DLayerFrom3D(string filenameDfsu3, string filenameDfsu2, int layerNumber)
{
IDfsuFile dfsu3File = DfsFileFactory.DfsuFileOpen(filenameDfsu3);
// Check that dfsu3 file is a 3D dfsu file.
switch (dfsu3File.DfsuFileType)
{
case DfsuFileType.Dfsu2D:
case DfsuFileType.DfsuVerticalColumn:
case DfsuFileType.DfsuVerticalProfileSigma:
case DfsuFileType.DfsuVerticalProfileSigmaZ:
throw new InvalidOperationException("Input file is not a 3D dfsu file");
}
// Calculate offset from toplayer element. Offset is between 0 (top layer) and
// dfsu3File.NumberOfLayers-1 (bottom layer)
int topLayerOffset;
if (layerNumber > 0 && layerNumber <= dfsu3File.NumberOfLayers)
{
topLayerOffset = dfsu3File.NumberOfLayers - layerNumber;
}
else if (layerNumber < 0 && -layerNumber <= dfsu3File.NumberOfLayers)
{
topLayerOffset = -layerNumber - 1;
}
else
{
throw new ArgumentException("Layer number is out of range");
}
double[] xv = dfsu3File.X;
double[] yv = dfsu3File.Y;
float[] zv = dfsu3File.Z;
int[] cv = dfsu3File.Code;
// --------------------------------------------------
// Create 2D mesh from 3D mesh
// List of new 2D nodes
int node2DCount = 0;
List <double> xv2 = new List <double>();
List <double> yv2 = new List <double>();
List <float> zv2 = new List <float>();
List <int> cv2 = new List <int>();
// Renumbering array, from 3D node numbers to 2D node numbers
// i.e. if a 3D element refers to node number k, the 2D element node number is renumber[k]
int[] renumber = new int[dfsu3File.NumberOfNodes];
// Coordinates of last created node
double xr2 = -1e-10;
double yr2 = -1e-10;
// Create 2D nodes, by skipping nodes with equal x,y coordinates
for (int i = 0; i < dfsu3File.NumberOfNodes; i++)
{
// If 3D x,y coordinates are equal to the last created 2D node,
// map this node to the last created 2D node, otherwise
// create new 2D node and map to that one
if (xv[i] != xr2 || yv[i] != yr2)
{
// Create new node
node2DCount++;
xr2 = xv[i];
yr2 = yv[i];
float zr2 = zv[i];
int cr2 = cv[i];
xv2.Add(xr2);
yv2.Add(yr2);
zv2.Add(zr2);
cv2.Add(cr2);
}
// Map this 3D node to the last created 2D node.
renumber[i] = node2DCount;
}
// Find indices of top layer elements
IList <int> topLayer = dfsu3File.FindTopLayerElements();
// Create element table for 2D dfsu file
int[][] elmttable2 = new int[topLayer.Count][];
for (int i = 0; i < topLayer.Count; i++)
{
// 3D element nodes
int[] elmt3 = dfsu3File.ElementTable[topLayer[i]];
// 2D element nodes, only half as big, so copy over the first half
int[] elmt2 = new int[elmt3.Length / 2];
for (int j = 0; j < elmt2.Length; j++)
{
elmt2[j] = renumber[elmt3[j]];
}
elmttable2[i] = elmt2;
}
// --------------------------------------------------
// Create 2D dfsu file
DfsuBuilder builder = DfsuBuilder.Create(DfsuFileType.Dfsu2D);
// Setup header and geometry
builder.SetNodes(xv2.ToArray(), yv2.ToArray(), zv2.ToArray(), cv2.ToArray());
builder.SetElements(elmttable2);
builder.SetProjection(dfsu3File.Projection);
builder.SetTimeInfo(dfsu3File.StartDateTime, dfsu3File.TimeStepInSeconds);
if (dfsu3File.ZUnit == eumUnit.eumUUnitUndefined)
{
builder.SetZUnit(eumUnit.eumUmeter);
}
else
{
builder.SetZUnit(dfsu3File.ZUnit);
}
// Add dynamic items, copying from source, though not the first one, if it
// contains the z-variation on the nodes
for (int i = 0; i < dfsu3File.ItemInfo.Count; i++)
{
IDfsSimpleDynamicItemInfo itemInfo = dfsu3File.ItemInfo[i];
if (itemInfo.ElementCount == dfsu3File.NumberOfElements)
{
builder.AddDynamicItem(itemInfo.Name, itemInfo.Quantity);
}
}
// Create file
DfsuFile dfsu2File = builder.CreateFile(filenameDfsu2);
// --------------------------------------------------
// Process data
// Check if the layer number exists for 2D element, i.e. if that element
// in 2D has that number of columnes in the 3D (relevant for sigma-z files)
// If elementExists[i] is false, write delete value to file
bool[] elementExists = new bool[topLayer.Count];
int numLayersInColumn = topLayer[0] + 1;
elementExists[0] = (numLayersInColumn - topLayerOffset) > 0;
for (int i = 1; i < topLayer.Count; i++)
{
numLayersInColumn = (topLayer[i] - topLayer[i - 1]);
elementExists[i] = (numLayersInColumn - topLayerOffset) > 0;
}
// For performance, use predefined itemdata objects when reading data from dfsu 3D file
IDfsItemData <float>[] dfsu3ItemDatas = new IDfsItemData <float> [dfsu3File.ItemInfo.Count];
for (int j = 0; j < dfsu3File.ItemInfo.Count; j++)
{
dfsu3ItemDatas[j] = (IDfsItemData <float>)dfsu3File.ItemInfo[j].CreateEmptyItemData();
}
// Float data to write to dfsu 2D file
float[] data2 = new float[dfsu2File.NumberOfElements];
float deleteValueFloat = dfsu2File.DeleteValueFloat;
for (int i = 0; i < dfsu3File.NumberOfTimeSteps; i++)
{
for (int j = 0; j < dfsu3File.ItemInfo.Count; j++)
{
// Read data from 3D dfsu
IDfsItemData <float> data3Item = dfsu3ItemDatas[j];
bool ok = dfsu3File.ReadItemTimeStep(data3Item, i);
// 3D data
float[] data3 = data3Item.Data;
// Skip any items not having size = NumberOfElments (the z-variation on the nodes)
if (data3.Length != dfsu3File.NumberOfElements)
{
continue;
}
// Loop over all 2D elements
for (int k = 0; k < topLayer.Count; k++)
{
// Extract layer data from 3D column into 2D element value
if (elementExists[k])
{
data2[k] = data3[topLayer[k] - topLayerOffset];
}
else
{
data2[k] = deleteValueFloat;
}
}
dfsu2File.WriteItemTimeStepNext(data3Item.Time, data2);
}
}
dfsu3File.Close();
dfsu2File.Close();
}