Added STSnapToGrid, STSnap Geometry Editors methods with tests

Author: apdevelop

LinqToDBPostGisNetTopologySuite.Tests/GeometryEditorsTests.cs

@@ -548,7 +548,6 @@ public void TestSTLineMerge()
  Assert.AreEqual(5, mergedLine.GetCoordinateN(2).X);
  Assert.AreEqual(4, mergedLine.GetCoordinateN(2).Y);
  Assert.AreEqual(double.NaN, mergedLine.GetCoordinateN(2).M);
-
  }
  }
 
@@ -611,6 +610,55 @@ public void TestSTSetPoint()
  }
  }
 
+ [Test]
+ public void TestSTSnapToGrid()
+ {
+ using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
+ {
+ Assert.AreEqual(
+ "LINESTRING(1.112 2.123,4.111 3.237)",
+ db.Select(() => GeometryInput.STGeomFromText("LINESTRING(1.1115678 2.123, 4.111111 3.2374897, 4.11112 3.23748667)")
+ .STSnapToGrid(0.001)
+ .STAsText()));
+
+ Assert.AreEqual(
+ "LINESTRING(-1.08 2.12 2.3 1.1144,4.12 3.22 3.1 1.1144,-1.08 2.12 2.3 1.1144)",
+ db.Select(() => GeometryInput.STGeomFromEWKT("LINESTRING(-1.1115678 2.123 2.3456 1.11111, 4.111111 3.2374897 3.1234 1.1111, -1.11111112 2.123 2.3456 1.1111112)")
+ .STSnapToGrid(GeometryInput.STGeomFromEWKT("POINT(1.12 2.22 3.2 4.4444)"), 0.1, 0.1, 0.1, 0.01)
+ .STAsEWKT()));
+
+ Assert.AreEqual(
+ "LINESTRING(-1.11 2.12 3 2.3456,4.11 3.24 3.1234 1.1111)",
+ db.Select(() => GeometryInput.STGeomFromEWKT("LINESTRING(-1.1115678 2.123 3 2.3456, 4.111111 3.2374897 3.1234 1.1111)")
+ .STSnapToGrid(0.01)
+ .STAsEWKT()));
+ }
+ }
+
+ [Test]
+ public void TestSTSnap()
+ {
+ const string LinestringWkt = "LINESTRING (5 107, 54 84, 101 100)";
+ const string MultiPolygonWkt = "MULTIPOLYGON(((26 125, 26 200, 126 200, 126 125, 26 125), (51 150, 101 150, 76 175, 51 150 )), ((151 100, 151 200, 176 175, 151 100 )))";
+
+ using (var db = new PostGisTestDataConnection(TestDatabaseConnectionString))
+ {
+ db.TestGeometries
+ .Value(g => g.Id, 1)
+ .Value(g => g.Geometry, () => GeometryInput.STGeomFromText(MultiPolygonWkt))
+ .Insert();
+
+ var line = db.Select(() => GeometryInput.STGeomFromText(LinestringWkt));
+
+ var snapped = db.TestGeometries
+ .Where(g => g.Id == 1)
+ .Select(g => g.Geometry.STSnap(line, g.Geometry.STDistance(line).Value * 1.01).STAsText())
+ .Single();
+
+ Assert.AreEqual(snapped, "MULTIPOLYGON(((26 125,26 200,126 200,126 125,101 100,26 125),(51 150,101 150,76 175,51 150)),((151 100,151 200,176 175,151 100)))");
+ }
+ }
+
  [Test]
  public void TestSTSwapOrdinates()
  {

LinqToDBPostGisNetTopologySuite/GeometryEditors.cs

@@ -301,6 +301,90 @@ public static NTSG STSetPoint(this NTSG geometry, int index, NTSG point)
  throw new InvalidOperationException();
  }
 
+ /// <summary>
+ /// Snaps all points of input <paramref name="geometry"/> to the grid defined by its origin and cell size.
+ /// </summary>
+ /// <remarks>
+ /// See https://postgis.net/docs/manual-3.0/ST_SnapToGrid.html
+ /// </remarks>
+ /// <param name="geometry">Input geometry.</param>
+ /// <param name="originX">X coordinate of grid origin.</param>
+ /// <param name="originY">Y coordinate of grid origin.</param>
+ /// <param name="sizeX">Grid cell size by X axis.</param>
+ /// <param name="sizeY">Grid cell size by Y axis.</param>
+ /// <returns>Geometry with all points snapped to grid.</returns>
+ [Sql.Function("ST_SnapToGrid", ServerSideOnly = true)]
+ public static NTSG STSnapToGrid(this NTSG geometry, double originX, double originY, double sizeX, double sizeY)
+ {
+ throw new InvalidOperationException();
+ }
+
+ /// <summary>
+ /// Snaps all points of input <paramref name="geometry"/> to the grid defined by its cell size.
+ /// </summary>
+ /// <remarks>
+ /// See https://postgis.net/docs/manual-3.0/ST_SnapToGrid.html
+ /// </remarks>
+ /// <param name="geometry">Input geometry.</param>
+ /// <param name="sizeX">Grid cell size by X axis.</param>
+ /// <param name="sizeY">Grid cell size by Y axis.</param>
+ /// <returns>Geometry with all points snapped to grid.</returns>
+ [Sql.Function("ST_SnapToGrid", ServerSideOnly = true)]
+ public static NTSG STSnapToGrid(this NTSG geometry, double sizeX, double sizeY)
+ {
+ throw new InvalidOperationException();
+ }
+
+ /// <summary>
+ /// Snaps all points of input <paramref name="geometry"/> to the grid defined by its cell size.
+ /// </summary>
+ /// <remarks>
+ /// See https://postgis.net/docs/manual-3.0/ST_SnapToGrid.html
+ /// </remarks>
+ /// <param name="geometry">Input geometry.</param>
+ /// <param name="size">Grid cell size.</param>
+ /// <returns>Geometry with all points snapped to grid.</returns>
+ [Sql.Function("ST_SnapToGrid", ServerSideOnly = true)]
+ public static NTSG STSnapToGrid(this NTSG geometry, double size)
+ {
+ throw new InvalidOperationException();
+ }
+
+ /// <summary>
+ /// Snaps all points of input <paramref name="geometry"/> to the grid defined by its origin point and cell sizes.
+ /// </summary>
+ /// <remarks>
+ /// See https://postgis.net/docs/manual-3.0/ST_SnapToGrid.html
+ /// </remarks>
+ /// <param name="geometry">Input geometry.</param>
+ /// <param name="origin">Grid origin (Point).</param>
+ /// <param name="sizeX">Grid cell size by X axis.</param>
+ /// <param name="sizeY">Grid cell size by Y axis.</param>
+ /// <param name="sizeZ">Grid cell size by Z axis.</param>
+ /// <param name="sizeM">Grid cell size by M axis.</param>
+ /// <returns>Geometry with all points snapped to grid.</returns>
+ [Sql.Function("ST_SnapToGrid", ServerSideOnly = true)]
+ public static NTSG STSnapToGrid(this NTSG geometry, NTSG origin, double sizeX, double sizeY, double sizeZ, double sizeM)
+ {
+ throw new InvalidOperationException();
+ }
+
+ /// <summary>
+ /// Snaps the vertices and segments of input <paramref name="geometry"/> to <paramref name="reference"/> geometry vertices.
+ /// </summary>
+ /// <remarks>
+ /// See https://postgis.net/docs/manual-3.0/ST_Snap.html
+ /// </remarks>
+ /// <param name="geometry">Input geometry.</param>
+ /// <param name="reference">Reference geometry.</param>
+ /// <param name="tolerance">Snap distance tolerance.</param>
+ /// <returns>Geometry with the vertices snapped.</returns>
+ [Sql.Function("ST_Snap", ServerSideOnly = true)]
+ public static NTSG STSnap(this NTSG geometry, NTSG reference, double tolerance)
+ {
+ throw new InvalidOperationException();
+ }
+
  /// <summary>
  /// Returns a version of input <paramref name="geometry"/> with given ordinates swapped.
  /// </summary>
@@ -309,7 +393,7 @@ public static NTSG STSetPoint(this NTSG geometry, int index, NTSG point)
  /// </remarks>
  /// <param name="geometry">Input geometry.</param>
  /// <param name="ordinates">Two-characters string naming the ordinates to swap. Valid names are: x,y,z and m.</param>
- /// <returns>Geometry with point removed</returns>
+ /// <returns>Geometry with given ordinates swapped.</returns>
  [Sql.Function("ST_SwapOrdinates", ServerSideOnly = true)]
  public static NTSG STSwapOrdinates(this NTSG geometry, string ordinates)
  {
@@ -324,7 +408,7 @@ public static NTSG STSwapOrdinates(this NTSG geometry, string ordinates)
  /// </remarks>
  /// <param name="geometry">Input geometry.</param>
  /// <param name="ordinates">Two-characters string naming the ordinates to swap. Valid names are: x,y,z and m.</param>
- /// <returns>Geometry with point removed</returns>
+ /// <returns>Geometry with given ordinates swapped.</returns>
  [Sql.Function("ST_SwapOrdinates", ServerSideOnly = true)]
  public static NTSG STSwapOrdinates(string geometry, string ordinates)
  {