public virtual void TestBufferPoint()
{
com.epl.geometry.SpatialReference sr = com.epl.geometry.SpatialReference.Create(4326);
com.epl.geometry.Point inputGeom = new com.epl.geometry.Point(12, 120);
com.epl.geometry.OperatorBuffer buffer = (com.epl.geometry.OperatorBuffer)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Buffer);
com.epl.geometry.OperatorSimplify simplify = (com.epl.geometry.OperatorSimplify)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Simplify);
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 40.0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)result;
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 1);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(System.Math.Abs(pointCount - 100.0) < 10);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() - 80) < 0.01 && System.Math.Abs(env2D.GetHeight() - 80) < 0.01);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 12) < 0.001 && System.Math.Abs(env2D.GetCenterY() - 120) < 0.001);
com.epl.geometry.NonSimpleResult nsr = new com.epl.geometry.NonSimpleResult();
bool is_simple = simplify.IsSimpleAsFeature(result, sr, true, nsr, null);
NUnit.Framework.Assert.IsTrue(is_simple);
{
result = buffer.Execute(inputGeom, sr, 0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
NUnit.Framework.Assert.IsTrue(result.IsEmpty());
}
{
result = buffer.Execute(inputGeom, sr, -1, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
NUnit.Framework.Assert.IsTrue(result.IsEmpty());
}
}
/// <summary>
/// Calculates a buffer polygon for each geometry at each of the
/// corresponding specified distances.
/// </summary>
/// <remarks>
/// Calculates a buffer polygon for each geometry at each of the
/// corresponding specified distances. It is assumed that all geometries have
/// the same spatial reference. There is an option to union the
/// returned geometries.
/// See OperatorBuffer.
/// </remarks>
/// <param name="geometries">An array of geometries to be buffered.</param>
/// <param name="spatialReference">The spatial reference of the geometries.</param>
/// <param name="distances">The corresponding distances for the input geometries to be buffered.</param>
/// <param name="toUnionResults">TRUE if all geometries buffered at a given distance are to be unioned into a single polygon.</param>
/// <returns>The buffer of the geometries.</returns>
public static com.epl.geometry.Polygon[] Buffer(com.epl.geometry.Geometry[] geometries, com.epl.geometry.SpatialReference spatialReference, double[] distances, bool toUnionResults)
{
// initially assume distances are in unit of spatial reference
double[] bufferDistances = distances;
com.epl.geometry.OperatorBuffer op = (com.epl.geometry.OperatorBuffer)factory.GetOperator(com.epl.geometry.Operator.Type.Buffer);
if (toUnionResults)
{
com.epl.geometry.SimpleGeometryCursor inputGeometriesCursor = new com.epl.geometry.SimpleGeometryCursor(geometries);
com.epl.geometry.GeometryCursor result = op.Execute(inputGeometriesCursor, spatialReference, bufferDistances, toUnionResults, null);
System.Collections.Generic.List <com.epl.geometry.Polygon> resultGeoms = new System.Collections.Generic.List <com.epl.geometry.Polygon>();
com.epl.geometry.Geometry g;
while ((g = result.Next()) != null)
{
resultGeoms.Add((com.epl.geometry.Polygon)g);
}
com.epl.geometry.Polygon[] buffers = resultGeoms.ToArray();
return(buffers);
}
else
{
com.epl.geometry.Polygon[] buffers = new com.epl.geometry.Polygon[geometries.Length];
for (int i = 0; i < geometries.Length; i++)
{
buffers[i] = (com.epl.geometry.Polygon)op.Execute(geometries[i], spatialReference, bufferDistances[i], null);
}
return(buffers);
}
}
/// <summary>
/// Calculates a buffer polygon of the geometry as specified by the
/// distance input.
/// </summary>
/// <remarks>
/// Calculates a buffer polygon of the geometry as specified by the
/// distance input. The buffer is implemented in the xy-plane.
/// See OperatorBuffer
/// </remarks>
/// <param name="geometry">Geometry to be buffered.</param>
/// <param name="spatialReference">The spatial reference of the geometry.</param>
/// <param name="distance">The specified distance for buffer. Same units as the spatial reference.</param>
/// <returns>The buffer polygon at the specified distances.</returns>
public static com.epl.geometry.Polygon Buffer(com.epl.geometry.Geometry geometry, com.epl.geometry.SpatialReference spatialReference, double distance)
{
double bufferDistance = distance;
com.epl.geometry.OperatorBuffer op = (com.epl.geometry.OperatorBuffer)factory.GetOperator(com.epl.geometry.Operator.Type.Buffer);
com.epl.geometry.Geometry result = op.Execute(geometry, spatialReference, bufferDistance, null);
return((com.epl.geometry.Polygon)result);
}
public virtual com.epl.geometry.ogc.OGCGeometry Buffer(double distance)
{
com.epl.geometry.OperatorBuffer op = (com.epl.geometry.OperatorBuffer)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Buffer);
if (distance == 0)
{
// when distance is 0, return self (maybe we should
// create a copy instead).
return(this);
}
double[] d = new double[] { distance };
com.epl.geometry.GeometryCursor cursor = op.Execute(GetEsriGeometryCursor(), GetEsriSpatialReference(), d, true, null);
return(com.epl.geometry.ogc.OGCGeometry.CreateFromEsriGeometry(cursor.Next(), esriSR));
}
public virtual void TestBufferPolygon()
{
com.epl.geometry.SpatialReference sr = com.epl.geometry.SpatialReference.Create(4326);
com.epl.geometry.Polygon inputGeom = new com.epl.geometry.Polygon();
com.epl.geometry.OperatorBuffer buffer = (com.epl.geometry.OperatorBuffer)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Buffer);
com.epl.geometry.OperatorSimplify simplify = (com.epl.geometry.OperatorSimplify)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Simplify);
inputGeom.StartPath(0, 0);
inputGeom.LineTo(50, 50);
inputGeom.LineTo(50, 0);
{
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
NUnit.Framework.Assert.IsTrue(result == inputGeom);
}
{
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 10, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)(result);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() - 20 - 50) < 0.1 && System.Math.Abs(env2D.GetHeight() - 20 - 50) < 0.1);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 25) < 0.1 && System.Math.Abs(env2D.GetCenterY() - 25) < 0.1);
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 1);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(System.Math.Abs(pointCount - 104.0) < 10);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
{
sr = com.epl.geometry.SpatialReference.Create(4326);
inputGeom = new com.epl.geometry.Polygon();
inputGeom.StartPath(0, 0);
inputGeom.LineTo(50, 50);
inputGeom.LineTo(50, 0);
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, -10, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)(result);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() - 15.85) < 0.1 && System.Math.Abs(env2D.GetHeight() - 15.85) < 0.1);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 32.07) < 0.1 && System.Math.Abs(env2D.GetCenterY() - 17.93) < 0.1);
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 1);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(pointCount == 3);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
{
sr = com.epl.geometry.SpatialReference.Create(4326);
inputGeom = new com.epl.geometry.Polygon();
inputGeom.StartPath(0, 0);
inputGeom.LineTo(0, 50);
inputGeom.LineTo(50, 50);
inputGeom.LineTo(50, 0);
inputGeom.StartPath(10, 10);
inputGeom.LineTo(40, 10);
inputGeom.LineTo(40, 40);
inputGeom.LineTo(10, 40);
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, -2, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)(result);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() + 4 - 50) < 0.1 && System.Math.Abs(env2D.GetHeight() + 4 - 50) < 0.1);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 25) < 0.1 && System.Math.Abs(env2D.GetCenterY() - 25) < 0.1);
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 2);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(System.Math.Abs(pointCount - 108) < 10);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
}
public virtual void TestBufferPolyline()
{
com.epl.geometry.SpatialReference sr = com.epl.geometry.SpatialReference.Create(4326);
com.epl.geometry.Polyline inputGeom = new com.epl.geometry.Polyline();
com.epl.geometry.OperatorBuffer buffer = (com.epl.geometry.OperatorBuffer)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Buffer);
com.epl.geometry.OperatorSimplify simplify = (com.epl.geometry.OperatorSimplify)com.epl.geometry.OperatorFactoryLocal.GetInstance().GetOperator(com.epl.geometry.Operator.Type.Simplify);
inputGeom.StartPath(0, 0);
inputGeom.LineTo(50, 50);
inputGeom.LineTo(50, 0);
inputGeom.LineTo(0, 50);
{
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
NUnit.Framework.Assert.IsTrue(result.IsEmpty());
}
{
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, -1, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
NUnit.Framework.Assert.IsTrue(result.IsEmpty());
}
{
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 40.0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)(result);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() - 80 - 50) < 0.1 && System.Math.Abs(env2D.GetHeight() - 80 - 50) < 0.1);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 25) < 0.1 && System.Math.Abs(env2D.GetCenterY() - 25) < 0.1);
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 1);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(System.Math.Abs(pointCount - 171.0) < 10);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
{
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 4.0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)(result);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() - 8 - 50) < 0.1 && System.Math.Abs(env2D.GetHeight() - 8 - 50) < 0.1);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 25) < 0.1 && System.Math.Abs(env2D.GetCenterY() - 25) < 0.1);
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 2);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(System.Math.Abs(pointCount - 186.0) < 10);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
{
inputGeom = new com.epl.geometry.Polyline();
inputGeom.StartPath(0, 0);
inputGeom.LineTo(50, 50);
inputGeom.StartPath(50, 0);
inputGeom.LineTo(0, 50);
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 4.0, null);
NUnit.Framework.Assert.IsTrue(result.GetType().Value() == com.epl.geometry.Geometry.GeometryType.Polygon);
com.epl.geometry.Polygon poly = (com.epl.geometry.Polygon)(result);
com.epl.geometry.Envelope2D env2D = new com.epl.geometry.Envelope2D();
result.QueryEnvelope2D(env2D);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetWidth() - 8 - 50) < 0.1 && System.Math.Abs(env2D.GetHeight() - 8 - 50) < 0.1);
NUnit.Framework.Assert.IsTrue(System.Math.Abs(env2D.GetCenterX() - 25) < 0.1 && System.Math.Abs(env2D.GetCenterY() - 25) < 0.1);
int pathCount = poly.GetPathCount();
NUnit.Framework.Assert.IsTrue(pathCount == 1);
int pointCount = poly.GetPointCount();
NUnit.Framework.Assert.IsTrue(System.Math.Abs(pointCount - 208.0) < 10);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
{
inputGeom = new com.epl.geometry.Polyline();
inputGeom.StartPath(1.762614, 0.607368);
inputGeom.LineTo(1.762414, 0.606655);
inputGeom.LineTo(1.763006, 0.607034);
inputGeom.LineTo(1.762548, 0.607135);
com.epl.geometry.Geometry result = buffer.Execute(inputGeom, sr, 0.005, null);
NUnit.Framework.Assert.IsTrue(simplify.IsSimpleAsFeature(result, sr, null));
}
}
