public void TestSimpleTriangulation()
{
var a = new Point3D(2, 0, 2);
var b = new Point3D(12, 0, 3);
var c = new Point3D(10, 10, 1);
var d = new Point3D(2, 20, 4);
var e = new Point3D(12, 20, 5);
var points = new [] { a, b, c, d, e };
SourceSurface surface = new SourceSurface(points);
DefaultTriangulation triangulation = new DefaultTriangulation();
var result = triangulation.GetTriangulatedSurface(surface, triangulation.GetDefaultOptions());
Triangle3D[] triangles = new [] { new Triangle3D(a, b, c), new Triangle3D(d, e, c), new Triangle3D(a, d, c), new Triangle3D(b, e, c) };
Assert.AreEqual(triangles.Length, result.Triangles.Length);
foreach (var triangle in triangles)
{
Assert.True(result.Triangles.Any(t => t.AreEqual(triangle)));
}
}
public void TestRealVolumeDiff()
{
CsvDataSource csvDataSource = new CsvDataSource();
CsvOptions csvOptions = (CsvOptions)csvDataSource.GetDefaultOptions();
csvOptions.FileName = Path.Combine(TestDir, "depthvalues.csv");
csvOptions.GridStep = "200 m";
csvOptions.Separator = " ";
DefaultTriangulation triangulation = new DefaultTriangulation();
SourceSurface surfaceTop = csvDataSource.GetSurface(csvOptions);
var triangulatedSurfaceTop = triangulation.GetTriangulatedSurface(surfaceTop, triangulation.GetDefaultOptions());
SourceSurfaceMover mover = new SourceSurfaceMover();
var moverOptions = (SourceSurfaceMoverOptions)mover.GetDefaultOptions();
moverOptions.Z = "100 m";
SourceSurface surfaceBottom = mover.GetModifiedSurface(surfaceTop, moverOptions);
var triangulatedSurfaceBottom = triangulation.GetTriangulatedSurface(surfaceBottom, triangulation.GetDefaultOptions());
IVolumeService service = new VolumeService();
var topVolume = service.GetVolumeUnderSurface(triangulatedSurfaceTop, 10000);
var bottomVolume = service.GetVolumeUnderSurface(triangulatedSurfaceBottom, 10000);
var diff = (int)(topVolume - bottomVolume);
Assert.AreEqual(200 * 200 * 100 * 15 * 25, diff);
}
public SourceSurface GetModifiedSurface(SourceSurface surface, IOptions options)
{
SourceSurfaceMoverOptions smOptions = (SourceSurfaceMoverOptions)options;
var moveVector = new Point3D(smOptions.X, smOptions.Y, smOptions.Z);
return(new SourceSurface(surface.Points.Select(p => p + moveVector).ToArray()));
}
void AssertSimpleSurface(SourceSurface sourceSurface)
{
var points = new []
{
new Point3D(0, 0, 1), new Point3D(100, 0, 2), new Point3D(200, 0, 3), new Point3D(0, 100, 4), new Point3D(100, 100, 5), new Point3D(200, 100, 6)
};
Assert.AreEqual(6, sourceSurface.Points.Length);
foreach (var point in points)
{
Assert.True(sourceSurface.Points.Any(p => p.AreEqual(point)));
}
}
public void TestCsvImportSeparator()
{
CsvDataSource csvDataSource = new CsvDataSource();
CsvOptions options = (CsvOptions)csvDataSource.GetDefaultOptions();
options.FileName = Path.Combine(TestDir, "simpleSurface_separator.csv");
options.GridStep = "100 m";
options.Separator = ";";
options.HeightMultiplier = "1 m";
SourceSurface result = csvDataSource.GetSurface(options);
AssertSimpleSurface(result);
}
public void TestRealTriangulation()
{
CsvDataSource csvDataSource = new CsvDataSource();
CsvOptions options = (CsvOptions)csvDataSource.GetDefaultOptions();
options.FileName = Path.Combine(TestDir, "depthvalues.csv");
options.GridStep = "200 ft";
options.Separator = " ";
SourceSurface surface = csvDataSource.GetSurface(options);
DefaultTriangulation triangulation = new DefaultTriangulation();
var result = triangulation.GetTriangulatedSurface(surface, triangulation.GetDefaultOptions());
Assert.AreEqual(15 * 25 * 2, result.Triangles.Length); // 16 x 26 points transformed to 15 x 25 rectangles, each is splitted into 2 triangles.
}
public void TestFailedTriangulation()
{
var a = new Point3D(2, 0, 2);
var b = new Point3D(3, 1, 3);
var c = new Point3D(4, 2, 1);
var d = new Point3D(5, 3, 4);
var e = new Point3D(6, 4, 5);
var points = new [] { a, b, c, d, e };
SourceSurface surface = new SourceSurface(points);
DefaultTriangulation triangulation = new DefaultTriangulation();
var result = triangulation.GetTriangulatedSurface(surface, triangulation.GetDefaultOptions());
Assert.AreEqual(0, result.Triangles.Length);
}
public TriangulatedSurface GetTriangulatedSurface(SourceSurface sourceSurface, IOptions options)
{
var vertices = sourceSurface.Points.Select(p => new Vertex(p)).ToList();
var triangulation = MIConvexHull.Triangulation.CreateDelaunay(vertices, Equality.Epsilon);
List <Triangle3D> triangles = new List <Triangle3D>();
foreach (var cell in triangulation.Cells)
{
if (cell.Vertices.Length != 3)
{
throw new Exception($"Cell vertices number is not 3. Triangulation failed.");
}
triangles.Add(new Triangle3D(cell.Vertices[0].OriginalPoint, cell.Vertices[1].OriginalPoint, cell.Vertices[2].OriginalPoint));
}
return(new TriangulatedSurface(triangles.ToArray()));
}
public void TestSurfaceMover()
{
var points = new Point3D[]
{
new Point3D(0, 0, 1), new Point3D(100, 0, 2), new Point3D(200, 0, 3), new Point3D(0, 100, 4), new Point3D(100, 100, 5), new Point3D(200, 100, 6)
};
SourceSurface surface = new SourceSurface(points);
SourceSurfaceMover mover = new SourceSurfaceMover();
SourceSurfaceMoverOptions options = (SourceSurfaceMoverOptions)mover.GetDefaultOptions();
options.X = "10 m";
options.Y = "8 m";
options.Z = "3 m";
var newSurface = mover.GetModifiedSurface(surface, options);
for (var index = 0; index < points.Length; index++)
{
var point = points[index];
Assert.True(new Point3D(point.X + 10, point.Y + 8, point.Z + 3).AreEqual(newSurface.Points[index]));
}
}
