/// <summary>
/// Serializes a stream with a style index.
/// </summary>
/// <param name="stream"></param>
/// <param name="index"></param>
public void Serialize(Stream stream, RTreeMemoryIndex<Scene2DEntry> index)
{
Scene2DStyledIndex styleIndex = new Scene2DStyledIndex();
Scene2DRTreeSerializer serializer = new Scene2DRTreeSerializer(true, styleIndex);
// serialize the tree and fill the styleindex.
MemoryStream rTreeStream = new MemoryStream();
serializer.Serialize(rTreeStream, index);
// serialize the index.
MemoryStream indexStream = new MemoryStream();
RuntimeTypeModel typeModel = TypeModel.Create();
typeModel.Add(typeof(Scene2DStyledIndex), true);
typeModel.Add(typeof(Icon2DStyle), true);
typeModel.Add(typeof(Image2DStyle), true);
typeModel.Add(typeof(Line2DStyle), true);
typeModel.Add(typeof(Point2DStyle), true);
typeModel.Add(typeof(Polygon2DStyle), true);
typeModel.Add(typeof(Text2DStyle), true);
typeModel.Add(typeof(LineText2DStyle), true);
typeModel.Serialize(indexStream, styleIndex);
// write to the final stream.
byte[] indexSizeBytes = BitConverter.GetBytes((int)indexStream.Length);
stream.Write(indexSizeBytes, 0, indexSizeBytes.Length);
indexStream.Seek(0, SeekOrigin.Begin);
indexStream.WriteTo(stream);
rTreeStream.WriteTo(stream);
indexStream.Dispose();
rTreeStream.Dispose();
}
public void RTreeMemoryIndexAddTests()
{
// build test-data.
var testDataList = new List<KeyValuePair<BoxF2D, DataTestClass>>();
const int count = 10000;
var randomGenerator = new RandomGenerator(66707770); // make this deterministic
for (int idx = 0; idx < count; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
var testData = new DataTestClass();
testData.Data = idx.ToString(System.Globalization.CultureInfo.InvariantCulture);
testDataList.Add(new KeyValuePair<BoxF2D, DataTestClass>(
box, testData));
}
// create the index and reference index.
var index = new RTreeMemoryIndex<DataTestClass>();
var reference = new ReferenceImplementation<DataTestClass>();
// add all the data.
for (int idx = 0; idx < count; idx++)
{
var keyValuePair = testDataList[idx];
index.Add(keyValuePair.Key, keyValuePair.Value);
reference.Add(keyValuePair.Key, keyValuePair.Value);
//Assert.AreEqual(reference.Count(), index.Count());
}
//Assert.AreEqual(count, index.Count());
// generate random boxes and compare results.
for (int idx = 0; idx < 200; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
var resultIndex = new HashSet<DataTestClass>(index.Get(box));
var resultReference = new HashSet<DataTestClass>(reference.Get(box));
foreach (var data in resultIndex)
{
Assert.IsTrue(resultReference.Contains(data));
}
foreach (var data in resultReference)
{
Assert.IsTrue(resultIndex.Contains(data));
}
}
}
/// <summary>
/// Serializes the given scene.
/// </summary>
/// <param name="stream"></param>
/// <param name="scene"></param>
/// <param name="compress"></param>
public static void Serialize(Stream stream, TagsCollectionBase metaTags, Scene2D scene, bool compress)
{
RuntimeTypeModel typeModel = SceneSerializer.BuildRuntimeTypeModel();
// [MetaIndexLenght:4][Metadata][SeneIndexLength:4][SceneIndex][SceneLengths:4*zoomFactors.length][Scenes]
// MetaIndexLenght: int The lenght of the meta index.
// Metadata: a number of serialized tags.
// SceneIndexLength: int The length of the sceneindex in bytes.
// SceneIndex: the serialized scene index.
// SceneLengths: int[] The lengths of the scenes per zoom level as in the zoomfactors array.
// Scenes: The serialized scenes themselves.
// serialize meta tags.
(new TagsCollectionSerializer()).SerializeWithSize(metaTags, stream);
// index index.
SceneIndex sceneIndex = new SceneIndex();
sceneIndex.LineStyles = scene.GetStyleLines();
sceneIndex.PointStyles = scene.GetStylePoints();
sceneIndex.PolygonStyles = scene.GetStylePolygons();
sceneIndex.TextStyles = scene.GetStyleTexts();
sceneIndex.ZoomRanges = scene.GetZoomRanges();
sceneIndex.ZoomFactors = scene.GetZoomFactors();
sceneIndex.IconImage = scene.GetImages();
// write SceneIndex
long positionAfterMeta = stream.Position;
stream.Seek(positionAfterMeta + 4, SeekOrigin.Begin);
long indexStart = stream.Position;
typeModel.Serialize(stream, sceneIndex);
// write SeneIndexLength
int indexSize = (int)(stream.Position - indexStart);
stream.Seek(positionAfterMeta + 0, SeekOrigin.Begin);
stream.Write(BitConverter.GetBytes(indexSize), 0, 4);
// write Scenes.
stream.Seek(positionAfterMeta + 4 + indexSize + 4 * sceneIndex.ZoomFactors.Length, SeekOrigin.Begin);
// index into r-trees and serialize.
int[] lengths = new int[sceneIndex.ZoomFactors.Length];
for (int idx = 0; idx < lengths.Length; idx++)
{
long position = stream.Position;
Dictionary<uint, SceneObject> sceneAtZoom = scene.GetObjectsAt(idx);
RTreeMemoryIndex<SceneObject> memoryIndex = new RTreeMemoryIndex<SceneObject>(50, 100);
float latestProgress = 0;
int sceneObjectIdx = 0;
foreach (KeyValuePair<uint, SceneObject> sceneObjectPair in sceneAtZoom)
{ // loop over all primitives in order.
SceneObject sceneObject = sceneObjectPair.Value;
uint id = sceneObjectPair.Key;
switch (sceneObject.Enum)
{
case SceneObjectType.IconObject:
case SceneObjectType.PointObject:
case SceneObjectType.TextObject:
OsmSharp.UI.Renderer.Scene.Scene2D.ScenePoint geo = scene.GetPoint(sceneObject.GeoId);
PointF2D point = new PointF2D(geo.X, geo.Y);
memoryIndex.Add(new BoxF2D(point), sceneObject);
break;
case SceneObjectType.LineObject:
case SceneObjectType.LineTextObject:
case SceneObjectType.PolygonObject:
OsmSharp.UI.Renderer.Scene.Scene2D.ScenePoints geos = scene.GetPoints(sceneObject.GeoId);
memoryIndex.Add(new BoxF2D(geos.X, geos.Y), sceneObject);
break;
}
float progress = (float)System.Math.Round((((double)sceneObjectIdx / (double)sceneAtZoom.Count) * 100));
if (progress != latestProgress)
{
OsmSharp.Logging.Log.TraceEvent("SceneSerializer", OsmSharp.Logging.TraceEventType.Information,
"Indexing scene objects at zoom {1} ({2}/{3})... {0}%", progress, sceneIndex.ZoomFactors[idx],
sceneObjectIdx, sceneAtZoom.Count);
latestProgress = progress;
}
sceneObjectIdx++;
}
// serialize the r-tree.
OsmSharp.Logging.Log.TraceEvent("SceneSerializer", OsmSharp.Logging.TraceEventType.Information,
"Serializing RTRee...");
SceneObjectRTreeSerializer memoryIndexSerializer = new SceneObjectRTreeSerializer(
scene, compress, idx, SceneSerializer.CalculateScaleFactor(sceneIndex.ZoomFactors[idx]));
memoryIndexSerializer.Serialize(new LimitedStream(stream), memoryIndex);
lengths[idx] = (int)(stream.Position - position);
}
// write SceneLengths
long end = stream.Position;
stream.Seek(positionAfterMeta + 4 + indexSize, SeekOrigin.Begin);
for (int idx = 0; idx < lengths.Length; idx++)
{
stream.Write(BitConverter.GetBytes(lengths[idx]), 0, 4);
}
stream.Seek(end, SeekOrigin.Begin);
}
public void RTreeMemoryIndexSmall1Tests()
{
var rect1 = new BoxF2D(0, 0, 2, 2);
var rect2 = new BoxF2D(4, 0, 6, 2);
var rect3 = new BoxF2D(0, 4, 2, 6);
var rect4 = new BoxF2D(4, 4, 6, 6);
var rect5 = new BoxF2D(1, 1, 3, 3);
// create the index and reference index.
var index = new RTreeMemoryIndex<string>(4, 1);
// add data.
index.Add(rect1, rect1.ToString() + "1");
index.Add(rect1, rect1.ToString() + "2");
index.Add(rect1, rect1.ToString() + "3");
index.Add(rect1, rect1.ToString() + "4");
index.Add(rect2, rect2.ToString() + "1");
index.Add(rect2, rect2.ToString() + "2");
index.Add(rect2, rect2.ToString() + "3");
index.Add(rect2, rect2.ToString() + "4");
index.Add(rect3, rect3.ToString() + "1");
index.Add(rect3, rect3.ToString() + "2");
index.Add(rect3, rect3.ToString() + "3");
index.Add(rect3, rect3.ToString() + "4");
index.Add(rect4, rect4.ToString() + "1");
index.Add(rect4, rect4.ToString() + "2");
index.Add(rect4, rect4.ToString() + "3");
index.Add(rect4, rect4.ToString() + "4");
index.Add(rect5, rect5.ToString());
// some simple queries.
var result = new HashSet<string>(
index.Get(rect4));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect4.ToString() + "1"));
Assert.IsTrue(result.Contains(rect4.ToString() + "2"));
Assert.IsTrue(result.Contains(rect4.ToString() + "3"));
Assert.IsTrue(result.Contains(rect4.ToString() + "4"));
result = new HashSet<string>(
index.Get(rect3));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect3.ToString() + "1"));
Assert.IsTrue(result.Contains(rect3.ToString() + "2"));
Assert.IsTrue(result.Contains(rect3.ToString() + "3"));
Assert.IsTrue(result.Contains(rect3.ToString() + "4"));
result = new HashSet<string>(
index.Get(rect2));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect2.ToString() + "1"));
Assert.IsTrue(result.Contains(rect2.ToString() + "2"));
Assert.IsTrue(result.Contains(rect2.ToString() + "3"));
Assert.IsTrue(result.Contains(rect2.ToString() + "4"));
result = new HashSet<string>(
index.Get(rect1));
Assert.AreEqual(5, result.Count);
Assert.IsTrue(result.Contains(rect1.ToString() + "1"));
Assert.IsTrue(result.Contains(rect1.ToString() + "2"));
Assert.IsTrue(result.Contains(rect1.ToString() + "3"));
Assert.IsTrue(result.Contains(rect1.ToString() + "4"));
Assert.IsTrue(result.Contains(rect5.ToString()));
}
public void RTreeMemoryIndexEnumerationTests()
{
// create the index.
var index = new RTreeMemoryIndex<DataTestClass>();
// build test-data.
var testDataList = new HashSet<DataTestClass>();
const int count = 10000;
var randomGenerator = new RandomGenerator(66707770); // make this deterministic
for (int idx = 0; idx < count; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
var testData = new DataTestClass();
testData.Data = idx.ToString(System.Globalization.CultureInfo.InvariantCulture);
testDataList.Add(testData);
index.Add(box, testData);
}
// compare and check if all data gets enumerated.
HashSet<DataTestClass> reference = new HashSet<DataTestClass>();
foreach (DataTestClass dataTestClass in index)
{
reference.Add(dataTestClass);
Assert.IsTrue(testDataList.Contains(dataTestClass));
}
Assert.AreEqual(testDataList.Count, reference.Count);
Assert.AreEqual(testDataList.Count, index.Count);
}
public void RTreeMemoryIndexAddTests()
{
// build test-data.
var testDataList = new List <KeyValuePair <BoxF2D, DataTestClass> >();
const int count = 1000;
var randomGenerator = new RandomGenerator(66707770); // make this deterministic
for (int idx = 0; idx < count; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
var testData = new DataTestClass();
testData.Data = idx.ToString(System.Globalization.CultureInfo.InvariantCulture);
testDataList.Add(new KeyValuePair <BoxF2D, DataTestClass>(
box, testData));
}
// create the index and reference index.
var index = new RTreeMemoryIndex <DataTestClass>();
var reference = new ReferenceImplementation <DataTestClass>();
// add all the data.
for (int idx = 0; idx < count; idx++)
{
var keyValuePair = testDataList[idx];
index.Add(keyValuePair.Key, keyValuePair.Value);
reference.Add(keyValuePair.Key, keyValuePair.Value);
//Assert.AreEqual(reference.Count(), index.Count());
}
//Assert.AreEqual(count, index.Count());
// generate random boxes and compare results.
for (int idx = 0; idx < 20; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
var resultIndex = new HashSet <DataTestClass>(index.Get(box));
var resultReference = new HashSet <DataTestClass>(reference.Get(box));
foreach (var data in resultIndex)
{
Assert.IsTrue(resultReference.Contains(data));
}
foreach (var data in resultReference)
{
Assert.IsTrue(resultIndex.Contains(data));
}
}
}
public void RTreeMemoryIndexSmall1Tests()
{
var rect1 = new BoxF2D(0, 0, 2, 2);
var rect2 = new BoxF2D(4, 0, 6, 2);
var rect3 = new BoxF2D(0, 4, 2, 6);
var rect4 = new BoxF2D(4, 4, 6, 6);
var rect5 = new BoxF2D(1, 1, 3, 3);
// create the index and reference index.
var index = new RTreeMemoryIndex <string>(4, 1);
// add data.
index.Add(rect1, rect1.ToString() + "1");
index.Add(rect1, rect1.ToString() + "2");
index.Add(rect1, rect1.ToString() + "3");
index.Add(rect1, rect1.ToString() + "4");
index.Add(rect2, rect2.ToString() + "1");
index.Add(rect2, rect2.ToString() + "2");
index.Add(rect2, rect2.ToString() + "3");
index.Add(rect2, rect2.ToString() + "4");
index.Add(rect3, rect3.ToString() + "1");
index.Add(rect3, rect3.ToString() + "2");
index.Add(rect3, rect3.ToString() + "3");
index.Add(rect3, rect3.ToString() + "4");
index.Add(rect4, rect4.ToString() + "1");
index.Add(rect4, rect4.ToString() + "2");
index.Add(rect4, rect4.ToString() + "3");
index.Add(rect4, rect4.ToString() + "4");
index.Add(rect5, rect5.ToString());
// some simple queries.
var result = new HashSet <string>(
index.Get(rect4));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect4.ToString() + "1"));
Assert.IsTrue(result.Contains(rect4.ToString() + "2"));
Assert.IsTrue(result.Contains(rect4.ToString() + "3"));
Assert.IsTrue(result.Contains(rect4.ToString() + "4"));
result = new HashSet <string>(
index.Get(rect3));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect3.ToString() + "1"));
Assert.IsTrue(result.Contains(rect3.ToString() + "2"));
Assert.IsTrue(result.Contains(rect3.ToString() + "3"));
Assert.IsTrue(result.Contains(rect3.ToString() + "4"));
result = new HashSet <string>(
index.Get(rect2));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect2.ToString() + "1"));
Assert.IsTrue(result.Contains(rect2.ToString() + "2"));
Assert.IsTrue(result.Contains(rect2.ToString() + "3"));
Assert.IsTrue(result.Contains(rect2.ToString() + "4"));
result = new HashSet <string>(
index.Get(rect1));
Assert.AreEqual(5, result.Count);
Assert.IsTrue(result.Contains(rect1.ToString() + "1"));
Assert.IsTrue(result.Contains(rect1.ToString() + "2"));
Assert.IsTrue(result.Contains(rect1.ToString() + "3"));
Assert.IsTrue(result.Contains(rect1.ToString() + "4"));
Assert.IsTrue(result.Contains(rect5.ToString()));
}
public void RTreeStreamSerializeIndexAddTests()
{
// build test-data.
var testDataList = new List <KeyValuePair <BoxF2D, string> >();
const int count = 10000;
var randomGenerator = new RandomGenerator(66707770); // make this deterministic
for (int idx = 0; idx < count; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
testDataList.Add(new KeyValuePair <BoxF2D, string>(
box, idx.ToString(System.Globalization.CultureInfo.InvariantCulture)));
}
// create the index and reference index.
var index = new RTreeMemoryIndex <string>();
var reference = new ReferenceImplementation <string>();
// add all the data.
for (int idx = 0; idx < count; idx++)
{
var keyValuePair = testDataList[idx];
index.Add(keyValuePair.Key, keyValuePair.Value);
reference.Add(keyValuePair.Key, keyValuePair.Value);
//Assert.AreEqual(reference.Count(), index.Count());
}
//Assert.AreEqual(count, index.Count());
var stream = new MemoryStream();
var serializer = new DataTestClassSerializer();
serializer.Serialize(stream, index);
ISpatialIndexReadonly <string> deserialized =
serializer.Deserialize(stream, true);
// query all.
var totalBox = new BoxF2D(0, 0, 1, 1);
var resultIndex = new HashSet <string>(deserialized.Get(totalBox));
var resultReference = new HashSet <string>(reference.Get(totalBox));
foreach (var data in resultIndex)
{
Assert.IsTrue(resultReference.Contains(data));
}
foreach (var data in resultReference)
{
Assert.IsTrue(resultIndex.Contains(data));
}
// generate random boxes and compare results.
for (int idx = 0; idx < 200; idx++)
{
double x1 = randomGenerator.Generate(1.0);
double x2 = randomGenerator.Generate(1.0);
double y1 = randomGenerator.Generate(1.0);
double y2 = randomGenerator.Generate(1.0);
var box = new BoxF2D(new PointF2D(x1, y1), new PointF2D(x2, y2));
resultIndex = new HashSet <string>(deserialized.Get(box));
resultReference = new HashSet <string>(reference.Get(box));
foreach (var data in resultIndex)
{
Assert.IsTrue(resultReference.Contains(data));
}
foreach (var data in resultReference)
{
Assert.IsTrue(resultIndex.Contains(data));
}
}
}
public void RTreeStreamSerializeSmallTest()
{
var rect1 = new BoxF2D(0, 0, 2, 2);
var rect2 = new BoxF2D(4, 0, 6, 2);
var rect3 = new BoxF2D(0, 4, 2, 6);
var rect4 = new BoxF2D(4, 4, 6, 6);
// create the index and reference index.
var index = new RTreeMemoryIndex <string>();
// add data.
index.Add(rect1, rect1.ToString() + "1");
index.Add(rect1, rect1.ToString() + "2");
index.Add(rect1, rect1.ToString() + "3");
index.Add(rect1, rect1.ToString() + "4");
index.Add(rect2, rect2.ToString() + "1");
index.Add(rect2, rect2.ToString() + "2");
index.Add(rect2, rect2.ToString() + "3");
index.Add(rect2, rect2.ToString() + "4");
index.Add(rect3, rect3.ToString() + "1");
index.Add(rect3, rect3.ToString() + "2");
index.Add(rect3, rect3.ToString() + "3");
index.Add(rect3, rect3.ToString() + "4");
index.Add(rect4, rect4.ToString() + "1");
index.Add(rect4, rect4.ToString() + "2");
index.Add(rect4, rect4.ToString() + "3");
index.Add(rect4, rect4.ToString() + "4");
var stream = new MemoryStream();
var serializer = new DataTestClassSerializer();
serializer.Serialize(stream, index);
ISpatialIndexReadonly <string> deserialized =
serializer.Deserialize(stream, true);
// some simple queries.
var result = new HashSet <string>(
deserialized.Get(rect4));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect4.ToString() + "1"));
Assert.IsTrue(result.Contains(rect4.ToString() + "2"));
Assert.IsTrue(result.Contains(rect4.ToString() + "3"));
Assert.IsTrue(result.Contains(rect4.ToString() + "4"));
result = new HashSet <string>(
deserialized.Get(rect3));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect3.ToString() + "1"));
Assert.IsTrue(result.Contains(rect3.ToString() + "2"));
Assert.IsTrue(result.Contains(rect3.ToString() + "3"));
Assert.IsTrue(result.Contains(rect3.ToString() + "4"));
result = new HashSet <string>(
deserialized.Get(rect2));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect2.ToString() + "1"));
Assert.IsTrue(result.Contains(rect2.ToString() + "2"));
Assert.IsTrue(result.Contains(rect2.ToString() + "3"));
Assert.IsTrue(result.Contains(rect2.ToString() + "4"));
result = new HashSet <string>(
deserialized.Get(rect1));
Assert.AreEqual(4, result.Count);
Assert.IsTrue(result.Contains(rect1.ToString() + "1"));
Assert.IsTrue(result.Contains(rect1.ToString() + "2"));
Assert.IsTrue(result.Contains(rect1.ToString() + "3"));
Assert.IsTrue(result.Contains(rect1.ToString() + "4"));
}
/// <summary>
/// Serializes all children of the given node.
/// </summary>
/// <param name="typeModel"></param>
/// <param name="nodeBase"></param>
/// <returns></returns>
private Stream Serialize(RuntimeTypeModel typeModel, RTreeMemoryIndex <T> .Node nodeBase)
{
var stream = _streamCache.CreateNew();
if (nodeBase.Children is List <RTreeMemoryIndex <T> .Node> )
{ // the node is not a leaf.
long position = 0;
var node = (nodeBase as RTreeMemoryIndex <T> .Node);
var childrenIndex = new ChildrenIndex();
childrenIndex.IsLeaf = new bool[nodeBase.Children.Count];
childrenIndex.MinX = new float[nodeBase.Children.Count];
childrenIndex.MinY = new float[nodeBase.Children.Count];
childrenIndex.MaxX = new float[nodeBase.Children.Count];
childrenIndex.MaxY = new float[nodeBase.Children.Count];
childrenIndex.Starts = new int[nodeBase.Children.Count];
var serializedChildren = new List <Stream>();
for (int idx = 0; idx < nodeBase.Children.Count; idx++)
{
var child = (node.Children[idx] as RTreeMemoryIndex <T> .Node);
BoxF2D box = node.Boxes[idx];
childrenIndex.MinX[idx] = (float)box.Min[0];
childrenIndex.MinY[idx] = (float)box.Min[1];
childrenIndex.MaxX[idx] = (float)box.Max[0];
childrenIndex.MaxY[idx] = (float)box.Max[1];
childrenIndex.IsLeaf[idx] = (
child.Children is List <T>);
Stream childSerialized = this.Serialize(typeModel, child);
serializedChildren.Add(childSerialized);
childrenIndex.Starts[idx] = (int)position;
position = position + childSerialized.Length;
}
childrenIndex.End = (int)position;
// serialize this index object.
var indexStream = new MemoryStream();
typeModel.Serialize(indexStream, childrenIndex);
byte[] indexBytes = indexStream.ToArray();
// START WRITING THE DATA TO THE TARGET STREAM HERE!
// 1: write the type of data.
byte[] leafFlag = new[] { (byte)0 };
stream.Write(leafFlag, 0, 1);
// 2: Write the length of the meta data.
byte[] indexLength = BitConverter.GetBytes(indexBytes.Length);
stream.Write(indexLength, 0, indexLength.Length);
// 3: write the meta data or the node-index.
stream.Write(indexBytes, 0, indexBytes.Length);
// 4: write the actual children.
for (int idx = 0; idx < serializedChildren.Count; idx++)
{
serializedChildren[idx].Seek(0, SeekOrigin.Begin);
serializedChildren[idx].CopyTo(stream);
_streamCache.Dispose(serializedChildren[idx]);
serializedChildren[idx] = null;
}
}
else if (nodeBase.Children is List <T> )
{ // the node is a leaf node.
// START WRITING THE DATA TO THE TARGET STREAM HERE!
// 1: write the type of data.
byte[] leafFlag = new[] { (byte)1 };
stream.Write(leafFlag, 0, 1);
// 2: write the leaf data.
byte[] data = this.Serialize(typeModel,
nodeBase.Children as List <T>,
nodeBase.Boxes);
stream.Write(data, 0, data.Length);
}
else
{
throw new Exception("Unknown node type!");
}
return(stream);
}
/// <summary>
/// Serializes this scene2D to the given stream.
/// </summary>
/// <param name="stream"></param>
/// <param name="compress"></param>
public void SerializeStyled(Stream stream, bool compress)
{
// build the index.
var index = new RTreeMemoryIndex<Scene2DEntry>();
foreach (var primitiveLayer in _primitives)
{
foreach (var primitive in primitiveLayer.Value)
{
index.Add(primitive.GetBox(), new Scene2DEntry()
{
Layer = primitiveLayer.Key,
Id = 0,
Scene2DPrimitive = primitive
});
}
}
// create the serializer.
var serializer = new OsmSharp.UI.Renderer.Scene.Storage.Styled.Scene2DStyledSerializer();
serializer.Serialize(stream, index);
}
/// <summary>
/// Serializes this scene2D to the given stream.
/// </summary>
/// <param name="stream"></param>
/// <param name="compress"></param>
public override void Serialize(Stream stream, bool compress)
{
// build the index.
var index = new RTreeMemoryIndex<Scene2DEntry>();
foreach (var primitiveLayer in _primitives)
{
foreach (var primitive in primitiveLayer.Value)
{
index.Add(primitive.GetBox(), new Scene2DEntry()
{
Layer = primitiveLayer.Key,
Id = 0,
Scene2DPrimitive = primitive
});
}
}
// create the serializer.
var serializer = new Scene2DRTreeSerializer(compress);
serializer.Serialize(stream, index);
}
/// <summary> /// Serializes the given index to the given stream. /// </summary> /// <param name="stream"></param> /// <param name="index"></param> protected abstract void DoSerialize(SpatialIndexSerializerStream stream, RTreeMemoryIndex <T> index);
private Stream Serialize(RuntimeTypeModel typeModel, RTreeMemoryIndex <T> .Node nodeBase)
{
Stream destination = this._streamCache.CreateNew();
if (nodeBase.Children is List <RTreeMemoryIndex <T> .Node> )
{
long num = 0;
RTreeMemoryIndex <T> .Node node = nodeBase;
ChildrenIndex childrenIndex = new ChildrenIndex();
childrenIndex.IsLeaf = new bool[nodeBase.Children.Count];
childrenIndex.MinX = new float[nodeBase.Children.Count];
childrenIndex.MinY = new float[nodeBase.Children.Count];
childrenIndex.MaxX = new float[nodeBase.Children.Count];
childrenIndex.MaxY = new float[nodeBase.Children.Count];
childrenIndex.Starts = new int[nodeBase.Children.Count];
List <Stream> streamList = new List <Stream>();
for (int index = 0; index < nodeBase.Children.Count; ++index)
{
RTreeMemoryIndex <T> .Node child = node.Children[index] as RTreeMemoryIndex <T> .Node;
BoxF2D box = node.Boxes[index];
childrenIndex.MinX[index] = (float)box.Min[0];
childrenIndex.MinY[index] = (float)box.Min[1];
childrenIndex.MaxX[index] = (float)box.Max[0];
childrenIndex.MaxY[index] = (float)box.Max[1];
childrenIndex.IsLeaf[index] = child.Children is List <T>;
Stream stream = this.Serialize(typeModel, child);
streamList.Add(stream);
childrenIndex.Starts[index] = (int)num;
num += stream.Length;
}
childrenIndex.End = (int)num;
MemoryStream memoryStream = new MemoryStream();
((TypeModel)typeModel).Serialize((Stream)memoryStream, (object)childrenIndex);
byte[] array = memoryStream.ToArray();
byte[] buffer = new byte[1];
destination.Write(buffer, 0, 1);
byte[] bytes = BitConverter.GetBytes(array.Length);
destination.Write(bytes, 0, bytes.Length);
destination.Write(array, 0, array.Length);
for (int index = 0; index < streamList.Count; ++index)
{
streamList[index].Seek(0L, SeekOrigin.Begin);
streamList[index].CopyTo(destination);
this._streamCache.Dispose(streamList[index]);
streamList[index] = (Stream)null;
}
}
else
{
if (!(nodeBase.Children is List <T>))
{
throw new Exception("Unknown node type!");
}
byte[] buffer1 = new byte[1] {
(byte)1
};
destination.Write(buffer1, 0, 1);
byte[] buffer2 = this.Serialize(typeModel, nodeBase.Children as List <T>, nodeBase.Boxes);
destination.Write(buffer2, 0, buffer2.Length);
}
return(destination);
}
