public GraphData(string name, List<Point> inputPoints, List<Segment> segments)
{
if (String.IsNullOrEmpty(name) || inputPoints == null || segments == null)
throw new ArgumentNullException();
Name = name;
//InputPoints = new List<Point>();
//InputSegments = new List<Segment>();
VoronoiSolution = new BoostVoronoi();
//Populate the input
foreach (var point in inputPoints)
{
//InputPoints.Add(point);
VoronoiSolution.AddPoint(point.X, point.Y);
}
foreach (var segment in segments)
{
//InputSegments.Add(segment);
VoronoiSolution.AddSegment(segment.Start.X, segment.Start.Y, segment.End.X, segment.End.Y);
}
//Construct
VoronoiSolution.Construct();
//Populate the output
//OutputVertices = VoronoiSolution.Vertices;
//OutputEdges = VoronoiSolution.Edges;
//OutputCells = VoronoiSolution.Cells;
}
static void Main(string[] args)
{
//Define a set of segments and pass them to the voronoi wrapper
List<Segment> input = new List<Segment>();
input.Add(new Segment(0, 0, 0, 10));
input.Add(new Segment(0, 10, 10, 10));
input.Add(new Segment(10, 10, 10, 0));
input.Add(new Segment(10, 0, 0, 0));
//Instanciate the voronoi wrapper
BoostVoronoi bv = new BoostVoronoi();
//Add a point
bv.AddPoint(5, 5);
//Add the segments
foreach (var s in input)
bv.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
//Build the C# Voronoi
bv.Construct();
//Get the voronoi output
List<Cell> cells = bv.Cells;
List<Edge> edges = bv.Edges;
List<Vertex> vertices = bv.Vertices;
foreach (var cell in cells)
{
Console.Out.WriteLine(String.Format("Cell Identifier {0}. Is open = {1}", cell.Index, cell.IsOpen));
foreach (var edgeIndex in cell.EdgesIndex)
{
Edge edge = edges[edgeIndex];
Console.Out.WriteLine(
String.Format(" Edge Index: {0}. Start vertex index: {1}, End vertex index: {2}",
edgeIndex,
edge.Start,
edge.End));
//If the vertex index equals -1, it means the edge is infinite. It is impossible to print the coordinates.
if (edge.IsLinear)
{
Vertex start = vertices[edge.Start];
Vertex end = vertices[edge.End];
Console.Out.WriteLine(
String.Format(" From:{0}, To: {1}",
start.ToString(),
end.ToString()));
}
}
}
Console.In.ReadLine();
}
static void ConstructAndMeasure(ref List<Point> inputPoints, ref List<Segment> inputSegments)
{
Console.WriteLine(String.Format("Testing with {0} points and {1} segments", inputPoints.Count, inputSegments.Count));
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
BoostVoronoi bv = new BoostVoronoi();
foreach (var point in inputPoints)
bv.AddPoint(point.X, point.Y);
foreach (var segment in inputSegments)
bv.AddSegment(segment.Start.X, segment.Start.Y, segment.End.X, segment.End.Y);
bv.Construct();
// Stop timing.
stopwatch.Stop();
Console.WriteLine("Time elapsed: {0:hh\\:mm\\:ss\\:ff}", stopwatch.Elapsed);
}
public void TestSegmentTwin()
{
List<Point> inputPoint = new List<Point>() { new Point(5, 5) };
List<Segment> inputSegment = new List<Segment>();
inputSegment.Add(new Segment(0, 0, 0, 10));
inputSegment.Add(new Segment(0, 10, 10, 10));
inputSegment.Add(new Segment(10, 10, 10, 0));
inputSegment.Add(new Segment(10, 0, 0, 0));
//Build the CLR voronoi
VoronoiWrapper vw = new VoronoiWrapper();
foreach (var p in inputPoint)
vw.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
vw.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
vw.ConstructVoronoi();
List<Tuple<int, int, bool, bool, List<int>, bool, short>> clrCells = vw.GetCells();
//Build the C# Voronoi
BoostVoronoi bv = new BoostVoronoi();
foreach (var p in inputPoint)
bv.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
bv.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
bv.Construct();
List<Edge> sharpEdges = bv.Edges;
//Test twin reciprocity
for (int i = 0; i < sharpEdges.Count; i++)
{
Assert.AreEqual(i, sharpEdges[sharpEdges[i].Twin].Twin);
}
}
public void TestSegmentDicretization()
{
List<Point> inputPoint = new List<Point>() { new Point(5, 5) };
List<Segment> inputSegment = new List<Segment>();
inputSegment.Add(new Segment(0, 0, 0, 10));
inputSegment.Add(new Segment(0, 0, 10, 0));
inputSegment.Add(new Segment(0, 10, 10, 10));
inputSegment.Add(new Segment(10, 0, 10, 10));
//Build the CLR voronoi
VoronoiWrapper vw = new VoronoiWrapper();
foreach (var p in inputPoint)
vw.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
vw.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
vw.ConstructVoronoi();
List<Tuple<int, int, bool, bool, List<int>, bool, short>> clrCells = vw.GetCells();
//Build the C# Voronoi
BoostVoronoi bv = new BoostVoronoi();
foreach (var p in inputPoint)
bv.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
bv.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
bv.Construct();
List<Vertex> vertices = bv.Vertices;
List<Edge> sharpEdges = bv.Edges;
List<Cell> sharpCells = bv.Cells;
int testEdgeIndex = 2;
for (int i = 0; i < sharpEdges.Count; i++)
{
if (sharpCells[sharpEdges[sharpEdges[i].Twin].Cell].SourceCategory == CellSourceCatory.SinglePoint
&&
sharpCells[sharpEdges[i].Cell].Site == 1)
testEdgeIndex = i;
}
Edge testEdge = sharpEdges[testEdgeIndex];
Vertex startVertex = vertices[testEdge.Start];
Vertex endVertex = vertices[testEdge.End];
List<Vertex> dvertices = bv.SampleCurvedEdge(testEdge, Distance.ComputeDistanceBetweenPoints(startVertex, endVertex) / 2);
int lastDicretizedVertexIndex = dvertices.Count - 1;
//Make sure that the end points are consistents
Assert.AreEqual(dvertices[0].X, startVertex.X);
Assert.AreEqual(dvertices[0].Y, startVertex.Y);
Assert.AreEqual(dvertices[lastDicretizedVertexIndex].X, endVertex.X);
Assert.AreEqual(dvertices[lastDicretizedVertexIndex].Y, endVertex.Y);
Assert.AreEqual(dvertices[2].X, 2.5);
Assert.AreEqual(dvertices[2].Y, 5);
}
public void TestPrimaryEdges()
{
List<Point> inputPoint = new List<Point>() { new Point(5, 5) };
List<Segment> inputSegment = new List<Segment>();
inputSegment.Add(new Segment(0, 0, 0, 10));
inputSegment.Add(new Segment(0, 0, 10, 0));
inputSegment.Add(new Segment(0, 10, 10, 10));
inputSegment.Add(new Segment(10, 0, 10, 10));
//Build the CLR voronoi
VoronoiWrapper vw = new VoronoiWrapper();
foreach (var p in inputPoint)
vw.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
vw.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
vw.ConstructVoronoi();
List<Tuple<int, int, bool, bool, List<int>, bool, short>> clrCells = vw.GetCells();
//Build the C# Voronoi
BoostVoronoi bv = new BoostVoronoi();
foreach (var p in inputPoint)
bv.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
bv.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
bv.Construct();
List<Vertex> vertices = bv.Vertices;
List<Edge> sharpEdges = bv.Edges;
int countPrimary = 0;
int countSecondary = 0;
int countFinite = 0;
for (int i = 0; i < sharpEdges.Count; i++)
{
if (sharpEdges[i].IsPrimary)
countPrimary++;
if (sharpEdges[i].IsFinite)
countFinite++;
if (!sharpEdges[i].IsPrimary && sharpEdges[i].IsFinite)
countSecondary++;
}
//8 finites from the center of the square corner + 8 edges arount the center point.
Assert.AreEqual(countFinite, 16);
//Check the number of secondary edge. Because this input is a square with a point in the center, the expected count is 0.
Assert.AreEqual(countSecondary, 0);
Assert.AreEqual(countPrimary, countFinite - countSecondary);
}
public void TestGetCellVertices()
{
List<Point> inputPoint = new List<Point>() { new Point(5, 5) };
List<Segment> inputSegment = new List<Segment>();
inputSegment.Add(new Segment(0, 0, 0, 10));
inputSegment.Add(new Segment(0, 0, 10, 0));
inputSegment.Add(new Segment(0, 10, 10, 10));
inputSegment.Add(new Segment(10, 0, 10, 10));
//Build the C# Voronoi
BoostVoronoi bv = new BoostVoronoi();
foreach (var p in inputPoint)
bv.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
bv.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
bv.Construct();
List<Vertex> vertices = bv.Vertices;
List<Edge> sharpEdges = bv.Edges;
List<Cell> cells = bv.Cells;
for (int i = 0; i < cells.Count; i++)
{
if(!cells[i].IsOpen)
{
List<int> vertexIndexes = cells[i].GetVertices(ref sharpEdges);
Assert.AreEqual(vertexIndexes.Count, 5);
Assert.AreEqual(vertexIndexes[0], vertexIndexes[vertexIndexes.Count - 1]);
}
}
}
public void TestFindInputSegmentSiteException()
{
List<Point> inputPoint = new List<Point>() { new Point(5, 5) };
List<Segment> inputSegment = new List<Segment>();
inputSegment.Add(new Segment(0, 0, 0, 10));
inputSegment.Add(new Segment(0, 0, 10, 0));
inputSegment.Add(new Segment(0, 10, 10, 10));
inputSegment.Add(new Segment(10, 0, 10, 10));
//Build the C# Voronoi
BoostVoronoi bv = new BoostVoronoi();
foreach (var p in inputPoint)
bv.AddPoint(p.X, p.Y);
foreach (var s in inputSegment)
bv.AddSegment(s.Start.X, s.Start.Y, s.End.X, s.End.Y);
bv.Construct();
List<Vertex> vertices = bv.Vertices;
List<Edge> sharpEdges = bv.Edges;
List<Cell> cells = bv.Cells;
for (int i = 0; i < cells.Count; i++)
{
if (cells[i].SourceCategory != CellSourceCatory.InitialSegment
&& cells[i].SourceCategory != CellSourceCatory.ReverseSegment)
{
bv.RetrieveInputSegment(cells[i]);
}
}
}
// Execute: Execute the function given the array of the parameters
public void Execute(IArray paramvalues, ITrackCancel trackcancel, IGPEnvironmentManager envMgr, IGPMessages message)
{
IFeatureClass outputFeatureClass = null;
try
{
// get the input feature class
IGPMultiValue inputFeatureClasses_Parameter = (IGPMultiValue)m_GPUtilities.UnpackGPValue(paramvalues.get_Element(0));
layer[] input_featureClasses = new layer[inputFeatureClasses_Parameter.Count];
for (int i = 0; i < inputFeatureClasses_Parameter.Count; i++)
{
IGPValue inputFeatureClass_Parameter = inputFeatureClasses_Parameter.get_Value(i);
IFeatureClass inputFeatureClass;
IQueryFilter inputQF;
m_GPUtilities.DecodeFeatureLayer(inputFeatureClass_Parameter, out inputFeatureClass, out inputQF);
input_featureClasses[i] = new layer() { featureclass = inputFeatureClass, qFilter = inputQF};
}
if (input_featureClasses.Length == 0 || input_featureClasses.Any(w=> w.featureclass == null))
{
message.AddError(2, "Could not open one or more input dataset.");
return;
}
//IFields additionalFields = new FieldsClass();
//additionalFields.AddField(FEATURE_SOURCE_FIELD_NAME, esriFieldType.esriFieldTypeString);
//additionalFields.AddField(FEATURE_ID_FIELD_NAME, esriFieldType.esriFieldTypeInteger);
//additionalFields.AddField(
// input_featureClasses[0].featureclass.Fields.get_Field(
// input_featureClasses[0].featureclass.Fields.FindField(
// input_featureClasses[0].featureclass.ShapeFieldName)));
// create the output feature class
IGPValue outputFeatureClass_Parameter = m_GPUtilities.UnpackGPValue(paramvalues.get_Element(1));
outputFeatureClass = GPHelperFunctions.CreateFeatureClass(outputFeatureClass_Parameter, envMgr);
if (outputFeatureClass == null)
{
message.AddError(2, "Could not create output dataset.");
return;
}
IGPString curveTypeParameter = (IGPString)m_GPUtilities.UnpackGPValue(paramvalues.get_Element(2));
ArcConstructionMethods method;
if (!Enum.TryParse<ArcConstructionMethods>(curveTypeParameter.Value, true, out method))
{
message.AddError(2, string.Format("The value {0} is not expected. Expected values are: {1}.",
curveTypeParameter.Value,
string.Join(",", Enum.GetNames(typeof(ArcConstructionMethods)))));
return;
}
IStepProgressor stepPro = (IStepProgressor)trackcancel;
GPHelperFunctions.dropSpatialIndex(outputFeatureClass);
BoostVoronoi bv = new BoostVoronoi(100);
double minX = int.MaxValue, minY = int.MaxValue, maxX = int.MinValue, maxY = int.MinValue;
List<site_key> point_sites = new List<site_key>();
List<site_key> segment_sites = new List<site_key>();
for (short i = 0; i < input_featureClasses.Length; i++)
{
layer l = input_featureClasses[i];
int featcount = l.featureclass.FeatureCount(l.qFilter);
stepPro.MinRange = 0;
stepPro.MaxRange = featcount;
stepPro.StepValue = (1);
stepPro.Message = "Reading features";
stepPro.Position = 0;
stepPro.Show();
IFeatureCursor cursor = null;
IFeature row = null;
try
{
cursor = l.featureclass.Search(l.qFilter, false);
while ((row = cursor.NextFeature()) != null)
{
stepPro.Step();
IPoint point = row.Shape as IPoint;
if (point != null)
{
double X = point.X;
double Y = point.Y;
minX = Math.Min(minX, X);
maxX = Math.Max(maxX, X);
minY = Math.Min(minY, Y);
maxY = Math.Max(maxY, Y);
bv.AddPoint(point.X, point.Y);
point_sites.Add(new site_key(i, row.OID));
}
IMultipoint multipoint = row.Shape as IMultipoint;
if (multipoint != null)
{
IPointCollection pointCollection = (IPointCollection)multipoint;
IEnumVertex vertices = pointCollection.EnumVertices;
IPoint vertex = null; int part, index;
vertices.Next(out vertex, out part, out index);
minX = Math.Min(minX, multipoint.Envelope.XMin);
maxX = Math.Max(maxX, multipoint.Envelope.XMax);
minY = Math.Min(minY, multipoint.Envelope.YMin);
maxY = Math.Max(maxY, multipoint.Envelope.YMax);
while (vertex != null)
{
bv.AddPoint(vertex.X, vertex.Y);
point_sites.Add(new site_key(i, row.OID));
vertices.Next(out vertex, out part, out index);
}
}
IPolyline polyline = row.Shape as IPolyline;
if (polyline != null)
{
double fromX = polyline.FromPoint.X;
double fromY = polyline.FromPoint.Y;
double toX = polyline.ToPoint.X;
double toY = polyline.ToPoint.Y;
if (toX < fromX)
{
minX = Math.Min(minX, toX);
maxX = Math.Max(maxX, fromX);
}
else
{
minX = Math.Min(minX, fromX);
maxX = Math.Max(maxX, toX);
}
if (toY < fromY)
{
minY = Math.Min(minY, toY);
maxY = Math.Max(maxY, fromY);
}
else
{
minY = Math.Min(minY, fromY);
maxY = Math.Max(maxY, toY);
}
bv.AddSegment(
polyline.FromPoint.X, polyline.FromPoint.Y,
polyline.ToPoint.X, polyline.ToPoint.Y
);
segment_sites.Add(new site_key(i, row.OID));
}
Marshal.ReleaseComObject(row);
}
}
finally
{
if (row != null) Marshal.ReleaseComObject(row);
if (cursor != null) Marshal.ReleaseComObject(cursor);
stepPro.Hide();
}
}
message.AddMessage(String.Format("{0}, {1} -> {2}, {3}", minX, minY, maxX, maxY));
int width = Math.Max((int)((maxX - minX) * 0.1), 1);
int height = Math.Max((int)((maxY - minY) * 0.1), 1);
maxX = maxX + width;
minX = minX - width;
maxY = maxY + height;
minY = minY - height;
message.AddMessage(String.Format("{0}, {1} -> {2}, {3}", minX, minY, maxX, maxY));
bv.AddSegment(minX, minY, maxX, minY);
segment_sites.Add(new site_key(-1, -1));
bv.AddSegment(maxX, minY, maxX, maxY);
segment_sites.Add(new site_key(-1, -1));
bv.AddSegment(maxX, maxY, minX, maxY);
segment_sites.Add(new site_key(-1, -1));
bv.AddSegment(minX, maxY, minX, minY);
segment_sites.Add(new site_key(-1, -1));
stepPro.Message = "Solve Voronoi";
stepPro.MaxRange = 0;
stepPro.MaxRange = 0;
stepPro.Show();
bv.Construct();
stepPro.Hide();
int featureSourceIndx = outputFeatureClass.Fields.FindField(FEATURE_SOURCE_FIELD_NAME);
int featureIDIndx = outputFeatureClass.Fields.FindField(FEATURE_ID_FIELD_NAME);
IFeatureCursor inserts = null;
IFeatureBuffer buffer = null;
try
{
object missing = Type.Missing;
ISpatialReference spatialReference = ((IGeoDataset)outputFeatureClass).SpatialReference;
inserts = outputFeatureClass.Insert(false);
buffer = outputFeatureClass.CreateFeatureBuffer();
List<Cell> cells = bv.Cells;
message.AddMessage(string.Format("{0} cells calculated", cells.Count));
List<Edge> edges = bv.Edges;
message.AddMessage(string.Format("{0} edges calculated", edges.Count));
List<Vertex> vertices = bv.Vertices;
message.AddMessage(string.Format("{0} vertexes calculated", vertices.Count));
stepPro.Message = "Write cells";
stepPro.MaxRange = 0;
stepPro.MaxRange = cells.Count;
stepPro.Show();
for (int cellIndex = 0; cellIndex < cells.Count; cellIndex++)
{
try
{
if(cellIndex % 5000 == 0) message.AddMessage(String.Format("{0}. {1} cells processed.", DateTime.Now, cellIndex));
Cell cell = cells[cellIndex];
int currentSite = cell.Site;
IGeometryCollection geometryCollection = new GeometryBagClass() { SpatialReference = spatialReference };
//ignores any sliver cells
if (cell.IsOpen || cell.EdgesIndex.Count < 3)
continue;
ISegmentCollection segmentCollection = createSegments(cell, bv, method, spatialReference);
if (((IArea)segmentCollection).Area <= 0)
{
message.AddMessage("A invalid geometry has been detected, try reversing the orientation.");
ISegmentCollection reversed_segmentCollection = new PolygonClass() { SpatialReference = spatialReference };
for (int i = segmentCollection.SegmentCount - 1; i >= 0; i--)
{
ISegment segment = (ISegment)segmentCollection.get_Segment(i);
segment.ReverseOrientation();
reversed_segmentCollection.AddSegment(segment);
}
segmentCollection = reversed_segmentCollection;
}
((IPolygon)segmentCollection).SpatialReference = spatialReference;
if (((IArea)segmentCollection).Area <= 0)
{
message.AddWarning("An empty shell has been created");
for (int i = 0; i < segmentCollection.SegmentCount; i++)
{
ISegment segment = (ISegment)segmentCollection.get_Segment(i);
message.AddMessage(String.Format("From {0}, {1} To {2},{3}",
segment.FromPoint.X, segment.FromPoint.Y,
segment.ToPoint.X, segment.ToPoint.Y));
}
}
//set attributes
site_key sk = (currentSite >= point_sites.Count) ? segment_sites[currentSite - point_sites.Count] : point_sites[currentSite];
if (!sk.isEmpty)
{
buffer.set_Value(featureSourceIndx, input_featureClasses[sk.featureClassIndex].featureclass.AliasName);
buffer.set_Value(featureIDIndx, sk.objectID);
}
else
{
buffer.set_Value(featureSourceIndx, DBNull.Value);
buffer.set_Value(featureIDIndx, DBNull.Value);
}
IPolygon voronoiPolygon = (IPolygon)segmentCollection;
buffer.Shape = (IPolygon)voronoiPolygon;
inserts.InsertFeature(buffer);
}
catch (Exception e)
{
message.AddWarning("Failed to create a cell");
}
}
}
finally
{
if (buffer != null) Marshal.ReleaseComObject(buffer);
if (inserts != null) Marshal.ReleaseComObject(inserts);
}
GPHelperFunctions.createSpatialIndex(outputFeatureClass);
}
catch (Exception exx)
{
message.AddError(2, exx.Message);
message.AddMessage(exx.ToString());
}
finally
{
if (outputFeatureClass != null) Marshal.ReleaseComObject(outputFeatureClass);
((IProgressor)trackcancel).Hide();
}
}