private void WriteShapeMultiPointRecords(Feature[] vfs)
{
//the fist record offset in 16-bit word
byte[] byteArray;
ShapeMultiPoint mulPoint;
Int32 contentLength;
if (_currentShxRecondPosition != 0)
{
_fsShxFile.Seek(_currentShxRecondPosition, SeekOrigin.Begin);
}
if (_currentShpRecondPosition != 0)
{
_fsMainFile.Seek(_currentShpRecondPosition, SeekOrigin.Begin);
}
for (int i = 0; i < vfs.Length; i++)
{
mulPoint = vfs[i].Geometry as ShapeMultiPoint;
contentLength = (mulPoint.Points.Length * 16 + 48) / 2;
byteArray = BitConverter.GetBytes(_featuresCount + i + 1);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(contentLength);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(_offset);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_offset += contentLength;
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Points.Length);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
foreach (ShapePoint sp in mulPoint.Points)
{
byteArray = BitConverter.GetBytes(sp.X);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(sp.Y);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
_currentShpRecondPosition = _fsMainFile.Position;
_currentShxRecondPosition = _fsShxFile.Position;
}
private void WriteShapePointRecords(Feature[] vfs)
{
//the fist record offset in 16-bit word
Int32 Offset = 50;
byte[] byteArray;
ShapePoint point;
for (int i = 0; i < vfs.Length; i++)
{
point = vfs[i].Geometry as ShapePoint;
byteArray = BitConverter.GetBytes(i + 1);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(14);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(Offset);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
Offset += 14;
////
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(point.X);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(point.Y);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
private void WriteShapeMultiPointRecords(Feature[] vfs)
{
//the fist record offset in 16-bit word
Int32 Offset = 50;
byte[] byteArray;
ShapeMultiPoint mulPoint;
Int32 contentLength;
for (int i = 0; i < vfs.Length; i++)
{
mulPoint = vfs[i].Geometry as ShapeMultiPoint;
contentLength = (mulPoint.Points.Length * 16 + 48) / 2;
byteArray = BitConverter.GetBytes(i + 1);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(contentLength);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(Offset);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
Offset += contentLength;
////
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Envelope.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(mulPoint.Points.Length);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
foreach (ShapePoint sp in mulPoint.Points)
{
byteArray = BitConverter.GetBytes(sp.X);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(sp.Y);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
}
private void WriteShapePointRecords(Feature[] vfs)
{
//the fist record offset in 16-bit word
byte[] byteArray;
ShapePoint point;
if (_currentShxRecondPosition != 0)
{
_fsShxFile.Seek(_currentShxRecondPosition, SeekOrigin.Begin);
}
if (_currentShpRecondPosition != 0)
{
_fsMainFile.Seek(_currentShpRecondPosition, SeekOrigin.Begin);
}
for (int i = 0; i < vfs.Length; i++)
{
point = vfs[i].Geometry as ShapePoint;
byteArray = BitConverter.GetBytes(_featuresCount + i + 1);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(10);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(_offset);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_offset += 14;
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(point.X);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(point.Y);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
_currentShpRecondPosition = _fsMainFile.Position;
_currentShxRecondPosition = _fsShxFile.Position;
}
private void WriteFileHeader(Feature[] features)
{
if (_isFirstWrite)
{
byte[] byteArray;
Envelope env = features[0].Geometry.Envelope;
for (int i = 1; i < features.Length; i++)
{
env.UnionWith(features[i].Geometry.Envelope);
}
_currentEnvelope = env;
byteArray = BitConverter.GetBytes(9994);
int byteArrayValue = ToLocalEndian.ToInt32FromBig(byteArray);
_bwMainFile.Write(byteArrayValue);
_bwShxFile.Write(byteArrayValue);
byteArray = new byte[20];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
//
byteArray = BitConverter.GetBytes(CalculateMainfileLengthInByte(features) / 2);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(CalculateShxfileLenthInByte(features) / 2);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
//
_bwMainFile.Write(1000);
_bwShxFile.Write(1000);
_bwMainFile.Write((int)_shapeType);
_bwShxFile.Write((int)_shapeType);
byteArray = BitConverter.GetBytes(env.MinX);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = BitConverter.GetBytes(env.MinY);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = BitConverter.GetBytes(env.MaxX);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = BitConverter.GetBytes(env.MaxY);
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
byteArray = new byte[32];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
_isFirstWrite = false;
}
else
{
byte[] byteArray;
Envelope env = features[0].Geometry.Envelope;
for (int i = 1; i < features.Length; i++)
{
env.UnionWith(features[i].Geometry.Envelope);
}
if (_currentEnvelope != null)
{
env.UnionWith(_currentEnvelope);
}
_currentEnvelope = env;
_fsMainFile.Seek(24, SeekOrigin.Begin);
_fsShxFile.Seek(24, SeekOrigin.Begin);
byteArray = BitConverter.GetBytes(CalculateMainfileLengthInByte(features) / 2);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(CalculateShxfileLenthInByte(features) / 2);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
_fsMainFile.Seek(8, SeekOrigin.Current);
_fsShxFile.Seek(8, SeekOrigin.Current);
byteArray = BitConverter.GetBytes(env.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
private void WriteShapePolygonRecords(Feature[] vfs)
{
//the fist record offset in 16-bit word
byte[] byteArray;
ShapePolygon polygon;
Int32 contentLength;
Int32 pointsNum = 0;
Int32 index = 0;
if (_currentShxRecondPosition != 0)
{
_fsShxFile.Seek(_currentShxRecondPosition, SeekOrigin.Begin);
}
if (_currentShpRecondPosition != 0)
{
_fsMainFile.Seek(_currentShpRecondPosition, SeekOrigin.Begin);
}
for (int i = 0; i < vfs.Length; i++)
{
polygon = vfs[i].Geometry as ShapePolygon;
pointsNum = 0;
index = 0;
contentLength = (44 + polygon.Rings.Length * 4) / 2;
foreach (ShapeRing part in polygon.Rings)
{
contentLength += part.Points.Length * 8;
pointsNum += part.Points.Length;
}
byteArray = BitConverter.GetBytes(_featuresCount + i + 1);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(_offset);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_offset += contentLength + 4;
byteArray = BitConverter.GetBytes(contentLength);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Rings.Length);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(pointsNum);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
foreach (ShapeRing sr in polygon.Rings)
{
byteArray = BitConverter.GetBytes(index);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
index += sr.Points.Length;
}
foreach (ShapeRing sr in polygon.Rings)
{
foreach (ShapePoint sp in sr.Points)
{
byteArray = BitConverter.GetBytes(sp.X);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(sp.Y);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
}
_currentShpRecondPosition = _fsMainFile.Position;
_currentShxRecondPosition = _fsShxFile.Position;
}
private void WriteVectorDataToFiles(Feature[] features)
{
byte[] byteArray;
Envelope env = new Envelope(double.MaxValue, double.MaxValue, double.MinValue, double.MinValue);
foreach (Feature vf in features)
{
env.UnionWith(vf.Geometry.Envelope);
}
////write main file
//write main file and shx file header
byteArray = BitConverter.GetBytes(9994);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = new byte[20];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
////
byteArray = BitConverter.GetBytes(CalculateMainfileLengthInByte(features) / 2);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
byteArray = BitConverter.GetBytes(CalculateShxfileLenthInByte(features) / 2);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
byteArray = BitConverter.GetBytes(1000);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(env.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
_bwShxFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = new byte[32];
_bwMainFile.Write(byteArray);
_bwShxFile.Write(byteArray);
//write main file and Shx file records
switch (_shapeType)
{
case enumShapeType.Point:
WriteShapePointRecords(features);
break;
case enumShapeType.MultiPoint:
WriteShapeMultiPointRecords(features);
break;
case enumShapeType.Polyline:
WriteShapePolylineRecords(features);
break;
case enumShapeType.Polygon:
WriteShapePolygonRecords(features);
break;
default:
break;
}
////write prj file,leave it now,no spec
CloseVectorDataFiles();
}
private void WriteShapePolygonRecords(Feature[] vfs)
{
//the fist record offset in 16-bit word
Int32 Offset = 50;
byte[] byteArray;
ShapePolygon polygon;
Int32 contentLength;
Int32 pointsNum = 0;
Int32 index = 0;
for (int i = 0; i < vfs.Length; i++)
{
polygon = vfs[i].Geometry as ShapePolygon;
pointsNum = 0;
index = 0;
contentLength = (44 + polygon.Rings.Length * 4) / 2;
foreach (ShapeRing part in polygon.Rings)
{
contentLength += part.Points.Length * 8;
pointsNum += part.Points.Length;
}
byteArray = BitConverter.GetBytes(i + 1);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
byteArray = BitConverter.GetBytes(Offset);
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
Offset += contentLength + 4;
////
byteArray = BitConverter.GetBytes(contentLength);
_bwMainFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
_bwShxFile.Write(ToLocalEndian.ToInt32FromBig(byteArray));
////
byteArray = BitConverter.GetBytes((int)_shapeType);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MinX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MinY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MaxX);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Envelope.MaxY);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(polygon.Rings.Length);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
byteArray = BitConverter.GetBytes(pointsNum);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
foreach (ShapeRing sr in polygon.Rings)
{
byteArray = BitConverter.GetBytes(index);
_bwMainFile.Write(ToLocalEndian.ToInt32FromLittle(byteArray));
index += sr.Points.Length;
}
foreach (ShapeRing sr in polygon.Rings)
{
foreach (ShapePoint sp in sr.Points)
{
byteArray = BitConverter.GetBytes(sp.X);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
byteArray = BitConverter.GetBytes(sp.Y);
_bwMainFile.Write(ToLocalEndian.ToInt64FromLittle(byteArray));
}
}
}
}