public Geometry BoundaryPolygonSMeshTest(string meshPath, bool alwaysMultiPolygon = true, string extra = "")
{
string fileName = Path.GetFileName(meshPath);
Stopwatch timer;
SMeshData mesh;
if (Path.GetExtension(meshPath) == ".dfsu")
{
DfsuFile file = DfsFileFactory.DfsuFileOpen(meshPath);
timer = MeshExtensions.StartTimer();
mesh = new SMeshData(file.Projection.WKTString, file.NodeIds, file.X, file.Y, file.Z.ToDoubleArray(), file.Code, file.ElementIds, file.ElementType, file.ElementTable.ToZeroBased());
file.Close();
}
else
{
MeshFile meshFile = MeshFile.ReadMesh(meshPath);
timer = MeshExtensions.StartTimer();
mesh = meshFile.ToSMeshData();
}
Console.Out.WriteLine("(#nodes,#elmts)=({0},{1}) ({2})", mesh.NumberOfNodes, mesh.NumberOfElements, mesh.NumberOfNodes + mesh.NumberOfElements);
timer.ReportAndRestart("Create ");
Geometry boundaryGeom = mesh.BuildBoundaryGeometry(alwaysMultiPolygon);
timer.ReportAndRestart("Build ");
BoundaryPolygonWriter(fileName, "-sbnd" + extra, boundaryGeom, timer);
return(boundaryGeom);
}
public void InterpolateNodeTest()
{
string triMesh = UnitTestHelper.TestDataDir + "odense_rough.mesh";
string quadMesh = UnitTestHelper.TestDataDir + "odense_rough_quads.mesh";
// Source mesh
MeshFile sourcemeshFile = MeshFile.ReadMesh(triMesh);
SMeshData sourcemesh = sourcemeshFile.ToSMeshData();
sourcemesh.BuildDerivedData();
// Target mesh
MeshFile targetMeshFile = MeshFile.ReadMesh(quadMesh);
SMeshData targetmesh = targetMeshFile.ToSMeshData();
targetmesh.BuildDerivedData();
MeshInterpolator2D interpolator = new MeshInterpolator2D(sourcemesh, MeshValueType.Nodes);
interpolator.SetTarget(targetmesh, MeshValueType.Nodes);
double[] target = new double[targetmesh.NumberOfNodes];
interpolator.InterpolateNodeToTarget(sourcemesh.Z, target);
Assert.False(target.Any(vv => vv == interpolator.DeleteValue));
targetMeshFile.Z = target;
targetMeshFile.Write(UnitTestHelper.TestDataDir + "test_odense_rough_quads-fromTri.mesh");
}
public List <SMeshBoundary> BoundaryListSMeshTest(string meshPath)
{
string fileName = Path.GetFileName(meshPath);
Stopwatch timer;
SMeshData mesh;
if (Path.GetExtension(meshPath) == ".dfsu")
{
DfsuFile file = DfsFileFactory.DfsuFileOpen(meshPath);
timer = MeshExtensions.StartTimer();
mesh = new SMeshData(file.Projection.WKTString, file.NodeIds, file.X, file.Y, file.Z.ToDoubleArray(), file.Code, file.ElementIds, file.ElementType, file.ElementTable.ToZeroBased());
file.Close();
}
else
{
MeshFile meshFile = MeshFile.ReadMesh(meshPath);
timer = MeshExtensions.StartTimer();
mesh = meshFile.ToSMeshData();
}
Console.Out.WriteLine("(#nodes,#elmts)=({0},{1}) ({2})", mesh.NumberOfNodes, mesh.NumberOfElements, mesh.NumberOfNodes + mesh.NumberOfElements);
timer.ReportAndRestart("Create");
List <SMeshBoundary> boundaries = mesh.BuildBoundaryList();
timer.ReportAndRestart("Time ");
string gpFileName = UnitTestHelper.TestDataDir + "test_" + fileName + "-bndscode.txt";
GnuPlotWriteBoundaryList(mesh, gpFileName, boundaries);
return(boundaries);
}
private static void DfsuBuildGeometry(string targetMeshFilename, DfsuBuilder builder)
{
DfsFactory factory = new DfsFactory();
if (targetMeshFilename.EndsWith(".mesh", StringComparison.OrdinalIgnoreCase))
{
MeshFile target = MeshFile.ReadMesh(targetMeshFilename);
// Setup header and geometry, copy from source file
builder.SetNodes(target.X, target.Y, target.Z.ToFloatArray(), target.Code);
builder.SetElements(target.ElementTable);
builder.SetProjection(factory.CreateProjection(target.Projection));
builder.SetZUnit(eumUnit.eumUmeter);
}
else
{
DfsuFile target = DfsFileFactory.DfsuFileOpen(targetMeshFilename);
// Setup header and geometry, copy from source file
builder.SetNodes(target.X, target.Y, target.Z, target.Code);
builder.SetElements(target.ElementTable);
builder.SetProjection(target.Projection);
builder.SetZUnit(eumUnit.eumUmeter);
target.Close();
}
}
public void NodeInterpolationTest(string meshFileName, CircularValueTypes cvt = CircularValueTypes.Normal)
{
// Source mesh
MeshFile meshFile = MeshFile.ReadMesh(meshFileName);
MeshData mesh = meshFile.ToMeshData();
// Allow for extrapolation on boundary nodes (disable clipping)
MeshNodeInterpolation interpolation = new MeshNodeInterpolation(mesh)
{
AllowExtrapolation = true,
};
interpolation.Setup();
Interpolator nodeInterpolator = interpolation.NodeInterpolator;
nodeInterpolator.CircularType = cvt;
// Find reference x and y value as the smallest x and y value
double xMin = mesh.Nodes.Select(mn => mn.X).Min();
double xMax = mesh.Nodes.Select(mn => mn.X).Max();
double yMin = mesh.Nodes.Select(mn => mn.Y).Min();
double yMax = mesh.Nodes.Select(mn => mn.Y).Max();
// Function over the (x,y) plane.
Func <double, double, double> function = ValueFunction(cvt, xMin, yMin, xMax, yMax);
// Calculate element center values
double[] elmtVals = new double[mesh.Elements.Count];
for (int i = 0; i < mesh.Elements.Count; i++)
{
MeshElement elmt = mesh.Elements[i];
elmtVals[i] = function(elmt.XCenter, elmt.YCenter);
}
// Write out bounds, to check we got things right
Console.Out.WriteLine("{0,10} (min,max) = ({1},{2})", cvt, elmtVals.Min(), elmtVals.Max());
// Interpolate to nodes
double[] nodeValues = new double[mesh.Nodes.Count];
nodeInterpolator.Interpolate(elmtVals, nodeValues);
// Check node values
for (int i = 0; i < mesh.Nodes.Count; i++)
{
MeshNode node = mesh.Nodes[i];
double exactValue = function(node.X, node.Y);
double interpValue = nodeValues[i];
double diff = exactValue - interpValue;
// It can only extrapolate when there is at least three elements per node.
// When there is two or less elements, the inverse distance weighting takes over
// and the results are not correct, so we skip the check here.
if (node.Elements.Count > 2 && diff > 1e-6)
{
string msg = string.Format("{0,2} {6}: {1}-{2}={3} ({4},{5})", i, exactValue, interpValue, diff, node.X, node.Y, node.Elements.Count);
Console.Out.WriteLine(msg);
Assert.Fail(msg);
}
}
}
public void SMeshDataOdenseQuadsTest()
{
string quadMesh = UnitTestHelper.TestDataDir + "odense_rough_quads.mesh";
MeshFile meshFile = MeshFile.ReadMesh(quadMesh);
SMeshData mesh = meshFile.ToSMeshData();
Assert.AreEqual(535, mesh.NumberOfNodes);
Assert.AreEqual(5, mesh.NodeIds[4]);
Assert.AreEqual(212827.81746849261, mesh.X[4]);
Assert.AreEqual(6156804.9152286667, mesh.Y[4]);
Assert.AreEqual(-0.42102556956959569, mesh.Z[4]);
Assert.AreEqual(1, mesh.Code[5]);
Assert.AreEqual(724, mesh.NumberOfElements);
Assert.AreEqual(5, mesh.ElementIds[4]);
Assert.AreEqual(3, mesh.ElementTable[4].Length);
Assert.AreEqual(62, mesh.ElementTable[4][0]); // Remember: Index here is zero based, while mesh file is one-based
Assert.AreEqual(367, mesh.ElementTable[4][1]);
Assert.AreEqual(358, mesh.ElementTable[4][2]);
mesh.BuildNodeElements();
Assert.AreEqual(4, mesh.NodesElmts[4].Count);
Assert.AreEqual(33, mesh.NodesElmts[4][0] + 1);
Assert.AreEqual(36, mesh.NodesElmts[4][1] + 1);
Assert.AreEqual(43, mesh.NodesElmts[4][2] + 1);
Assert.AreEqual(58, mesh.NodesElmts[4][3] + 1);
//mesh.BuildFaces(true, true, false);
//int reverts = FaceRevert(mesh, mesh.Faces);
//Console.Out.WriteLine("reverts: " + reverts);
//mesh.Faces.Sort(FaceSortComparer);
//List<MeshFace> facesOld = mesh.Faces;
//mesh.BuildFaces(true, true, true);
//reverts = FaceRevert(mesh, mesh.Faces);
//Console.Out.WriteLine("reverts: " + reverts);
//mesh.Faces.Sort(FaceSortComparer);
//List<MeshFace> facesNew = mesh.Faces;
//for (int i = 0; i < facesOld.Count; i++)
//{
// bool ok = FaceEquals(facesOld[i], facesNew[i]);
// Assert.IsTrue(ok, "Face " + i);
//}
//Assert.AreEqual(1259, mesh.Faces.Count);
//Assert.AreEqual(1, mesh.Faces[0].FromNode.Id);
//Assert.AreEqual(42, mesh.Faces[0].ToNode.Id);
//Assert.AreEqual(1, mesh.Faces[1].FromNode.Id);
//Assert.AreEqual(251, mesh.Faces[1].ToNode.Id);
//Assert.AreEqual(1, mesh.Faces[2].FromNode.Id);
//Assert.AreEqual(309, mesh.Faces[2].ToNode.Id);
//int ind = mesh.Faces.FindIndex(mf => mf.FromNode.Id == 68);
//Assert.AreEqual(202, ind);
//Assert.AreEqual(68, mesh.Faces[ind].FromNode.Id);
//Assert.AreEqual(43, mesh.Faces[ind].ToNode.Id);
//Assert.AreEqual(1, mesh.Faces[ind].Code);
//Assert.AreEqual(366, mesh.Faces[ind].LeftElement.Id);
//Assert.AreEqual(null, mesh.Faces[ind].RightElement);
}
public void MeshDataOdenseQuadsTest()
{
string quadMesh = UnitTestHelper.TestDataDir + "odense_rough_quads.mesh";
MeshFile meshFile = MeshFile.ReadMesh(quadMesh);
MeshData mesh = meshFile.ToMeshData();
Assert.AreEqual(535, mesh.Nodes.Count);
Assert.AreEqual(4, mesh.Nodes[4].Index);
Assert.AreEqual(5, mesh.Nodes[4].Id);
Assert.AreEqual(212827.81746849261, mesh.Nodes[4].X);
Assert.AreEqual(6156804.9152286667, mesh.Nodes[4].Y);
Assert.AreEqual(-0.42102556956959569, mesh.Nodes[4].Z);
Assert.AreEqual(1, mesh.Nodes[5].Code);
Assert.AreEqual(724, mesh.Elements.Count);
Assert.AreEqual(4, mesh.Elements[4].Index);
Assert.AreEqual(5, mesh.Elements[4].Id);
Assert.AreEqual(3, mesh.Elements[4].Nodes.Count);
Assert.AreEqual(62, mesh.Elements[4].Nodes[0].Index); // Remember: Index here is zero based, while mesh file is one-based
Assert.AreEqual(367, mesh.Elements[4].Nodes[1].Index);
Assert.AreEqual(358, mesh.Elements[4].Nodes[2].Index);
mesh.BuildNodeElements();
Assert.AreEqual(4, mesh.Nodes[4].Elements.Count);
Assert.AreEqual(33, mesh.Nodes[4].Elements[0].Id);
Assert.AreEqual(36, mesh.Nodes[4].Elements[1].Id);
Assert.AreEqual(43, mesh.Nodes[4].Elements[2].Id);
Assert.AreEqual(58, mesh.Nodes[4].Elements[3].Id);
mesh.BuildFaces(true);
FaceRevert(mesh, mesh.Faces);
mesh.Faces.Sort(FaceSortComparer);
Assert.AreEqual(1259, mesh.Faces.Count);
Assert.AreEqual(1, mesh.Faces[0].FromNode.Id);
Assert.AreEqual(42, mesh.Faces[0].ToNode.Id);
Assert.AreEqual(1, mesh.Faces[1].FromNode.Id);
Assert.AreEqual(251, mesh.Faces[1].ToNode.Id);
Assert.AreEqual(1, mesh.Faces[2].FromNode.Id);
Assert.AreEqual(309, mesh.Faces[2].ToNode.Id);
int ind = mesh.Faces.FindIndex(mf => mf.FromNode.Id == 68);
Assert.AreEqual(202, ind);
Assert.AreEqual(68, mesh.Faces[ind].FromNode.Id);
Assert.AreEqual(43, mesh.Faces[ind].ToNode.Id);
Assert.AreEqual(1, mesh.Faces[ind].Code);
Assert.AreEqual(366, mesh.Faces[ind].LeftElement.Id);
Assert.AreEqual(null, mesh.Faces[ind].RightElement);
}
public void MeshBoundaryToFileTest()
{
string triMesh = UnitTestHelper.TestDataDir + "odense_rough.mesh";
MeshFile meshFile = MeshFile.ReadMesh(triMesh);
MeshData mesh = meshFile.ToMeshData();
List <MeshBoundary> boundaries = MeshBoundary.BuildBoundaryList(mesh);
Assert.AreEqual(2, boundaries.Count);
Assert.AreEqual(1, boundaries[0].Code);
Assert.AreEqual(2, boundaries[1].Code);
Assert.AreEqual(2, boundaries[0].Segments.Count);
Assert.AreEqual(1, boundaries[1].Segments.Count);
Assert.AreEqual(9, boundaries[1].Segments[0].Count);
// First node of the first code-1 boundary segment is the last node of the code-2 boundary segment
Assert.IsTrue(boundaries[0].Segments[0][0].FromNode == boundaries[1].Segments[0].Last().ToNode);
Assert.IsTrue(boundaries[0].Segments[0].Last().ToNode == boundaries[1].Segments[0][0].FromNode);
StreamWriter writer = new StreamWriter(UnitTestHelper.TestDataDir + "out_odense_rough-bnd.txt");
foreach (MeshBoundary meshBoundary in boundaries)
{
writer.WriteLine("# " + meshBoundary.Code);
foreach (List <MeshFace> segment in meshBoundary.Segments)
{
writer.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} {1}", segment[0].FromNode.X, segment[0].FromNode.Y));
foreach (MeshFace face in segment)
{
writer.WriteLine(string.Format(CultureInfo.InvariantCulture, "{0} {1}", face.ToNode.X, face.ToNode.Y));
}
writer.WriteLine("");
}
writer.WriteLine("");
}
writer.Close();
}
public void InterpolateElementValuesToXYExample()
{
// Source mesh
string triMesh = UnitTestHelper.TestDataDir + "odense_rough.mesh";
MeshFile meshFile = MeshFile.ReadMesh(triMesh);
MeshData mesh = meshFile.ToMeshData();
mesh.BuildDerivedData();
// Element center values - usually read from dfsu file - here
// we just calculate some arbitrary linear function of (x,y)
double[] sourceValues = new double[meshFile.NumberOfElements];
for (int i = 0; i < meshFile.NumberOfElements; i++)
{
sourceValues[i] = 2 * mesh.Elements[i].XCenter + mesh.Elements[i].YCenter;
}
// Mesh interpolator
MeshInterpolator2D interpolator = new MeshInterpolator2D(mesh, MeshValueType.Elements);
// Coordinates to interpolate values to
interpolator.SetTargetSize(3);
interpolator.AddTarget(216600, 6159900);
interpolator.AddTarget(216700, 6159900);
interpolator.AddTarget(216700, 6160000);
// Array to interpolate values to
double[] targetValues = new double[3];
// Interpolate element values to target values
interpolator.InterpolateElmtToTarget(sourceValues, targetValues);
// Test that values are really 2*x+y
Assert.AreEqual(2 * 216600 + 6159900, targetValues[0], 1e-6);
Assert.AreEqual(2 * 216700 + 6159900, targetValues[1], 1e-6);
Assert.AreEqual(2 * 216700 + 6160000, targetValues[2], 1e-6);
}
public void InterpolationTest(string sourceMeshFileName, string targetMeshFileName, CircularValueTypes cvt = CircularValueTypes.Normal)
{
// Source mesh
MeshFile meshFile = MeshFile.ReadMesh(sourceMeshFileName);
MeshData mesh = meshFile.ToMeshData();
mesh.BuildDerivedData();
// Mesh to interpolate to
MeshFile targetFile = MeshFile.ReadMesh(targetMeshFileName);
MeshData targetmesh = targetFile.ToMeshData();
// Setup interpolator
MeshInterpolator2D interpolator = new MeshInterpolator2D(mesh)
{
CircularType = cvt, AllowExtrapolation = true
};
interpolator.SetupNodeInterpolation();
interpolator.SetTarget(targetmesh);
// Find reference x and y value as the smallest x and y value
double xMin = mesh.Nodes.Select(mn => mn.X).Min();
double xMax = mesh.Nodes.Select(mn => mn.X).Max();
double yMin = mesh.Nodes.Select(mn => mn.Y).Min();
double yMax = mesh.Nodes.Select(mn => mn.Y).Max();
// Function over the (x,y) plane.
Func <double, double, double> function = ValueFunction(cvt, xMin, yMin, xMax, yMax);
// Calculate element center values of function
double[] elmtVals = new double[mesh.Elements.Count];
for (int i = 0; i < mesh.Elements.Count; i++)
{
MeshElement elmt = mesh.Elements[i];
elmtVals[i] = function(elmt.XCenter, elmt.YCenter);
}
// Write out bounds, to check we got things right
Console.Out.WriteLine("{0,10} (min,max) = ({1},{2})", cvt, elmtVals.Min(), elmtVals.Max());
// Interpolate to nodes
double[] targetValues = new double[targetmesh.Elements.Count];
interpolator.InterpolateToTarget(elmtVals, targetValues);
// Check node values
for (int i = 0; i < targetmesh.Elements.Count; i++)
{
MeshElement targetElmt = targetmesh.Elements[i];
double exactValue = function(targetElmt.XCenter, targetElmt.YCenter);
double interpValue = targetValues[i];
double diff = exactValue - interpValue;
// Check if target element has a boundary node.
// Nodes on the boundary may not have correctly interpolated value due to
// inverse distance interpolation on the boundary, and hence also interpolation
// to target element value will not be exact. So only check on those elements that are
// fully internal (no boundary nodes).
bool internalElmt = targetElmt.Nodes.Select(node => node.Code).All(code => code == 0);
if (internalElmt && diff > 1e-6 * Math.Max(Math.Abs(exactValue), 1))
{
string msg = string.Format("{0,2} : {1}-{2}={3} ({4},{5})", i, exactValue, interpValue, diff, targetElmt.XCenter, targetElmt.YCenter);
Console.Out.WriteLine(msg);
Assert.Fail(msg);
}
}
}
/// <summary>
/// Process the incoming mesh file names
/// </summary>
/// <param name="files">List of mesh file names to merge</param>
/// <param name="fileBoundaryCodesToRemove">List of boundary codes to remove for each mesh. Must match the size of the files argument</param>
public void Process(List <string> files, List <List <int> > fileBoundaryCodesToRemove = null)
{
// Extent of entire domain, all meshes
Extent extent = new Extent();
// Load all meshes
List <MeshFile> meshes = new List <MeshFile>(files.Count);
for (int i = 0; i < files.Count; i++)
{
MeshFile mesh = MeshFile.ReadMesh(files[i]);
meshes.Add(mesh);
for (int j = 0; j < mesh.NumberOfNodes; j++)
{
extent.Include(mesh.X[j], mesh.Y[j]);
}
}
// grow it a littl bit, in case of rounding errors
extent.XMin = extent.XMin - NodeTolerance;
extent.XMax = extent.XMax + NodeTolerance;
extent.YMin = extent.YMin - NodeTolerance;
extent.YMax = extent.YMax + NodeTolerance;
// Initialize search tree
_nodeSearchTree = new QuadSearchTree(extent);
// Create new mesh nodes and elements
for (int i = 0; i < files.Count; i++)
{
int prevNodeMergeCount = NodeMergeCount;
List <int> boundaryCodesToRemove = fileBoundaryCodesToRemove != null ? fileBoundaryCodesToRemove[i] : null;
AddMesh(meshes[i], boundaryCodesToRemove);
if (i > 0)
{
Console.Out.WriteLine("Mesh {0}, number of nodes merged in: {1}", i + 1, NodeMergeCount - prevNodeMergeCount);
}
}
Console.Out.WriteLine("Total number of nodes merged in : {0}", NodeMergeCount);
RemoveInternalBoundaryCodes(_code, _connectivity);
// Create new mesh file
string projection = meshes[0].ProjectionString;
eumQuantity eumQuantity = meshes[0].EumQuantity;
MeshBuilder builder = new MeshBuilder();
builder.SetNodes(_x.ToArray(), _y.ToArray(), _z.ToArray(), _code.ToArray());
builder.SetElements(_connectivity.ToArray());
builder.SetProjection(projection);
builder.SetEumQuantity(eumQuantity);
MeshFile newMesh = builder.CreateMesh();
MeshValidator meshValidator = new MeshValidator();
meshValidator.ValidateMesh(newMesh.X, newMesh.Y, newMesh.Code, newMesh.ElementTable);
foreach (string error in meshValidator.Errors)
{
Console.Out.WriteLine(error);
}
newMesh.Write(_newMeshFileName);
//-------------------------------------
// Do some statistics on the mesh:
// collect number of face codes for each mesh
SortedDictionary <int, int[]> bcCodesStats = new SortedDictionary <int, int[]>();
List <MeshValidator> validators = new List <MeshValidator>();
for (int meshIndex = 0; meshIndex < meshes.Count; meshIndex++)
{
MeshFile meshFile = meshes[meshIndex];
MeshValidator validator = new MeshValidator();
validator.ValidateMesh(meshFile.X, meshFile.Y, meshFile.Code, meshFile.ElementTable);
validators.Add(validator);
UpdateStatistics(meshes.Count + 1, meshIndex, bcCodesStats, validator.GetFaceCodeStatistics());
}
UpdateStatistics(meshes.Count + 1, meshes.Count, bcCodesStats, meshValidator.GetFaceCodeStatistics());
Console.Out.Write("---------------------");
Console.Out.Write(" Statistics of faces ");
Console.Out.Write("---------------------");
Console.Out.WriteLine("");
Console.Out.Write("FaceCode |");
for (int i = 0; i < meshes.Count; i++)
{
Console.Out.Write(" mesh {0,2} ", i + 1);
}
Console.Out.Write(" | total | new mesh");
Console.Out.WriteLine("");
int[] totals = new int[meshes.Count + 2];
foreach (KeyValuePair <int, int[]> keyValuePair in bcCodesStats)
{
Console.Out.Write(" {0,4} |", keyValuePair.Key);
int total = 0;
for (int index = 0; index < keyValuePair.Value.Length - 1; index++)
{
int meshCodeCount = keyValuePair.Value[index];
total += meshCodeCount;
totals[index] += meshCodeCount;
Console.Out.Write(" {0,7} ", meshCodeCount);
}
totals[meshes.Count] += total;
totals[meshes.Count + 1] += keyValuePair.Value.Last();
Console.Out.Write(" |{0,7} | ", total);
Console.Out.Write(" {0,7} ", keyValuePair.Value.Last());
Console.Out.WriteLine("");
}
Console.Out.Write(" total |");
for (int index = 0; index < meshes.Count; index++)
{
Console.Out.Write(" {0,7} ", totals[index]);
}
Console.Out.Write(" |{0,7} | ", totals[meshes.Count]);
Console.Out.Write(" {0,7} ", totals[meshes.Count + 1]);
Console.Out.WriteLine("");
Console.Out.Write("---------------------");
Console.Out.Write("---------------------");
Console.Out.Write("---------------------");
Console.Out.WriteLine("");
}
public void InterpolateToXYExample(bool nodeInterp)
{
// Source mesh
string triMesh = UnitTestHelper.TestDataDir + "small.mesh";
MeshFile meshFile = MeshFile.ReadMesh(triMesh);
SMeshData mesh = meshFile.ToSMeshData();
// Build derived data, required for the interpolation routines
mesh.BuildDerivedData();
// Create element center Z values array
double[] elmtZ = new double[meshFile.NumberOfElements];
Array.Copy(mesh.ElementZCenter, elmtZ, mesh.NumberOfElements);
// Make a strong peak at element 5 - in the center of the mesh
elmtZ[4] = -6;
// Set up so source can be both element values and node values
MeshValueType sourceType = MeshValueType.Elements | MeshValueType.Nodes;
// Mesh interpolator
MeshInterpolator2D interpolator = new MeshInterpolator2D(mesh, sourceType);
if (nodeInterp)
{
// Simpler interpolation type
interpolator.ElementValueInterpolationType = MeshInterpolator2D.ElmtValueInterpolationType.NodeValues;
}
// Interpolate elmtZ to nodeZ
double[] nodeZInterp = new double[mesh.NumberOfNodes];
interpolator.SetupElmtToNodeInterpolation();
interpolator.NodeInterpolator.Interpolate(elmtZ, nodeZInterp);
// Interpolation of values one-by-one, no storing of interpolation weights
Assert.AreEqual(-5.999, interpolator.InterpolateElmtToXY(0.7833, 0.531, elmtZ, nodeZInterp), 1e-3);
Assert.AreEqual(-3.543, interpolator.InterpolateNodeToXY(0.7833, 0.531, nodeZInterp), 1e-3);
// Add targets, to store interpolation weights
interpolator.SetTargetSize(mesh.NumberOfElements + 1);
interpolator.AddTarget(0.7833, 0.531); // Target at (almost) center of element 5
for (int i = 0; i < mesh.NumberOfElements; i++)
{
interpolator.AddTarget(mesh.ElementXCenter[i], mesh.ElementYCenter[i]);
}
// Array to interpolate values to
double[] targetValues = new double[mesh.NumberOfElements + 1];
// Interpolate to all target points
interpolator.InterpolateElmtToTarget(elmtZ, targetValues);
if (!nodeInterp)
{
// When element+node values are used, close to peak value of 6
Assert.AreEqual(-5.999, targetValues[0], 1e-3);
Assert.AreEqual(-3.8225, targetValues[1], 1e-3);
for (int i = 0; i < mesh.NumberOfElements; i++)
{
Assert.AreEqual(elmtZ[i], targetValues[i + 1]);
}
}
else // Using only node interpolation, the value is cut off
{
Assert.AreEqual(-3.543, targetValues[0], 1e-3);
Assert.AreEqual(-3.649, targetValues[1], 1e-3);
}
// Interpolating in node Z values, matching to box center value of element.
interpolator.InterpolateNodeToTarget(mesh.Z, targetValues);
Assert.AreEqual(-4.376, targetValues[0], 1e-3);
Assert.AreEqual(-4.376, mesh.ElementZCenter[4], 1e-3);
}
/// <summary>
/// Example of how to plot a mesh file. A mesh contains bottom levels in each node.
/// </summary>
public static void MeshTest(bool makeBmp)
{
DHI.Chart.Map.Chart.Init();
// Load mesh data
string pathName = Path.Combine(UnitTestHelper.TestDataRoot, @"oresund.mesh");
MeshFile meshFile = MeshFile.ReadMesh(pathName);
// FemGridData is data for the bottom levels, a value in each element node, used for coloring
FemGridData data = new FemGridData();
data.CreateNodesAndElements(meshFile.NumberOfNodes, meshFile.NumberOfElements, meshFile.X, meshFile.Y, meshFile.Z.ToFloatArray(), meshFile.ElementTable);
// Create chart
DHI.Chart.Map.Chart chart = new DHI.Chart.Map.Chart();
// Add overlay that plots the bottom levels
FemGridOverlay overlay = new FemGridOverlay();
overlay.SetGridData(data);
overlay.EnableNiceValue = true;
overlay.CreateAutoScaledRainbowPalette();
overlay.EnableIsoline = true;
overlay.ColoringType = MapOverlay.EColoringType.ContinuousColoring;
overlay.SetFeathering(true, 0.5f);
overlay.EnableIsolineLabel = true;
chart.AddOverlay(overlay);
// Grab map projection of meshfile
MapProjection mapProj = new MapProjection(meshFile.ProjectionString);
double lonOrigin, latOrigin, eastOrigin, northOrigin;
mapProj.GetOrigin(out lonOrigin, out latOrigin);
mapProj.Geo2Proj(lonOrigin, latOrigin, out eastOrigin, out northOrigin);
double convergence = mapProj.GetConvergence(lonOrigin, latOrigin);
// Overlay adding geographical lines
// Mesh is drawn in map projection coordinates
GeoGridOverlay ggOverlay = new GeoGridOverlay();
ggOverlay.ReferenceProjection = meshFile.ProjectionString;
ggOverlay.DisplayProjection = meshFile.ProjectionString;
// Origin for mesh data is the origin of the projection
ggOverlay.SetGeoOrigin(lonOrigin, latOrigin);
ggOverlay.SetOrigin(eastOrigin, northOrigin);
// Mesh overlay draws in map projection coordinates, so north-Y rotation is the convergence (which is zero)
ggOverlay.SetNYCRotation(convergence);
ggOverlay.EnableLonLatGrid = true;
ggOverlay.EnableMapProjGrid = true;
// DataValid must be set after changing in GeoGridOverlay
ggOverlay.DataValid = true;
chart.AddOverlay(ggOverlay);
// Select rectangle to plot, by default the full data area
MzRectangle wrect = new MzRectangle();
data.GetDataArea(wrect);
// Here you may limit the area to be plotted
//wrect.X0 = wrect.X0 + 20000;
//wrect.Y0 = wrect.Y0 + 20000;
//wrect.X1 = wrect.X0 + 30000;
//wrect.Y1 = wrect.Y0 + 30000;
chart.SetDataArea(wrect);
chart.SetView(wrect);
//chart.GetActiveCoordinateSystem().SetDrawAxis(true, true);
//chart.GetActiveCoordinateSystem().EnableBorder(true);
//chart.DrawGrid = true;
//chart.DrawTitle = true;
// Draw to bitmap
double ratio = wrect.Width / (double)wrect.Height;
Bitmap bmp = new Bitmap(((int)(ratio * 1024)) + 10, 1024);
chart.Draw(bmp);
chart.Dispose();
if (makeBmp)
{
string pngFilepath = Path.Combine(UnitTestHelper.TestDataRoot, @"oresundMesh.png");
bmp.Save(pngFilepath);
System.Diagnostics.Process.Start(pngFilepath);
}
}
/// <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();
}
