private void ReadPolygonM(Byte[] dataStream, int streamPosition)
{
var pg = new PolygonM();
pg.BoundingBox = new Double[4];
pg.BoundingBox[0] = ReadDoubleLittleEndian(dataStream, streamPosition);
pg.BoundingBox[1] = ReadDoubleLittleEndian(dataStream, streamPosition + 8);
pg.BoundingBox[2] = ReadDoubleLittleEndian(dataStream, streamPosition + 16);
pg.BoundingBox[3] = ReadDoubleLittleEndian(dataStream, streamPosition + 24);
var numberOfParts = ReadIntLittleEndian(dataStream, streamPosition + 32);
var numberOfPoints = ReadIntLittleEndian(dataStream, streamPosition + 36);
pg.Rings = new RingM[numberOfParts];
var parts = new int[numberOfParts];
var pos = streamPosition + 40;
// Convert starting indices to ending indices for the geometry. Skip first record.
for (var i = 1; i < numberOfParts; i++)
{
parts[i - 1] = ReadIntLittleEndian(dataStream, pos + (i * 4)) - 1;
}
// Add the final record as the end of last "part".
parts[numberOfParts - 1] = numberOfPoints - 1;
pos = pos + 4 * numberOfParts;
var z = 0;
int lineEndsAt;
var rng = new RingM();
var pts = new List<PointM>();
for (var i = 0; i < numberOfPoints; i++)
{
lineEndsAt = parts[z];
if (i == lineEndsAt)
{
// End of polygon. Add the last point and wrap up.
var p = new PointM();
p.X = ReadDoubleLittleEndian(dataStream, pos + (i * 16));
p.Y = ReadDoubleLittleEndian(dataStream, pos + (i * 16) + 8);
pts.Add(p);
rng.Points = pts.ToArray();
pts.Clear();
pg.Rings[z] = rng;
rng = new RingM();
if (z < numberOfParts - 1) z++;
}
else
{
var p = new PointM();
p.X = ReadDoubleLittleEndian(dataStream, pos + (i * 16));
p.Y = ReadDoubleLittleEndian(dataStream, pos + (i * 16) + 8);
pts.Add(p);
}
}
pos = pos + numberOfPoints * 16;
pg.MMin = ReadDoubleLittleEndian(dataStream, pos);
pg.MMax = ReadDoubleLittleEndian(dataStream, pos + 8);
var pointIndex = 0;
for (var i = 0; i < pg.Rings.Length; i++)
{
for (var k = 0; k < pg.Rings[i].Points.Length; k++)
{
pg.Rings[i].Points[k].M = ReadDoubleLittleEndian(dataStream, pos + 16 + (pointIndex * 8));
pointIndex++;
}
}
Shapes.Add(pg);
}
private void ReadPolyLineM(Byte[] dataStream, int streamPosition)
{
var pl = new PolyLineM();
pl.BoundingBox = new Double[4];
pl.BoundingBox[0] = ReadDoubleLittleEndian(dataStream, streamPosition);
pl.BoundingBox[1] = ReadDoubleLittleEndian(dataStream, streamPosition + 8);
pl.BoundingBox[2] = ReadDoubleLittleEndian(dataStream, streamPosition + 16);
pl.BoundingBox[3] = ReadDoubleLittleEndian(dataStream, streamPosition + 24);
var numberOfParts = ReadIntLittleEndian(dataStream, streamPosition + 32);
var numberOfPoints = ReadIntLittleEndian(dataStream, streamPosition + 36);
pl.Lines = new LineM[numberOfParts];
var parts = new int[numberOfParts];
var pos = streamPosition + 40;
for (var i = 1; i < numberOfParts; i++)
{
parts[i - 1] = ReadIntLittleEndian(dataStream, pos + (i * 4)) - 1;
}
parts[numberOfParts - 1] = numberOfPoints - 1;
pos = pos + 4 * numberOfParts;
var z = 0;
int lineEndsAt;
var ln = new LineM();
var pts = new List<PointM>();
for (var i = 0; i < numberOfPoints; i++)
{
lineEndsAt = parts[z];
if (i == lineEndsAt)
{
// End of line, add the last point and wrap up
var p = new PointM();
p.X = ReadDoubleLittleEndian(dataStream, pos + (i * 16));
p.Y = ReadDoubleLittleEndian(dataStream, pos + (i * 16) + 8);
pts.Add(p);
ln.Points = pts.ToArray();
pts.Clear();
pl.Lines[z] = ln;
ln = new LineM();
if (z < numberOfParts - 1) z++;
}
else
{
// Keep adding the points
var p = new PointM();
p.X = ReadDoubleLittleEndian(dataStream, pos + (i * 16));
p.Y = ReadDoubleLittleEndian(dataStream, pos + (i * 16) + 8);
pts.Add(p);
}
}
pos = pos + numberOfPoints * 16;
pl.MMin = ReadDoubleLittleEndian(dataStream, pos);
pl.MMax = ReadDoubleLittleEndian(dataStream, pos + 8);
var pointIndex = 0;
for (var i = 0; i < pl.Lines.Length; i++)
{
for (var k = 0; k < pl.Lines[i].Points.Length; k++) {
pl.Lines[i].Points[k].M = ReadDoubleLittleEndian(dataStream, pos + 16 + (pointIndex * 8));
pointIndex++;
}
}
Shapes.Add(pl);
}
private void ReadPointM(Byte[] dataStream, int streamPosition)
{
var p = new PointM();
p.X = ReadDoubleLittleEndian(dataStream, streamPosition);
p.Y = ReadDoubleLittleEndian(dataStream, streamPosition + 8);
p.M = ReadDoubleLittleEndian(dataStream, streamPosition + 16);
Shapes.Add(p);
}
