public IEnumerable <TerrainRow> GetTerrainRows([NotNull] Box box)
{
int startTileIndexX;
int endTileIndexX;
int startTileIndexY;
double terrainTileSize;
double terrainXMin;
double terrainYMin;
int terrainTileCount;
GetTerrainTiling(
box, FirstTerrainBox,
out terrainTileCount,
out startTileIndexX, out endTileIndexX,
out startTileIndexY,
out terrainTileSize, out terrainXMin, out terrainYMin);
for (var terrainTileIndex = 0;
terrainTileIndex < terrainTileCount;
terrainTileIndex++)
{
int iX = terrainTileIndex % (endTileIndexX - startTileIndexX);
int iY = terrainTileIndex / (endTileIndexX - startTileIndexX);
double xMin = terrainXMin + (iX + startTileIndexX) * terrainTileSize;
double yMin = terrainYMin + (iY + startTileIndexY) * terrainTileSize;
double xMax = terrainXMin + (iX + startTileIndexX + 1) * terrainTileSize;
double yMax = terrainYMin + (iY + startTileIndexY + 1) * terrainTileSize;
IEnvelope terrainBox = new EnvelopeClass();
terrainBox.PutCoords(xMin, yMin, xMax, yMax);
terrainBox.SpatialReference = _terrainReference.Dataset.SpatialReference;
var terrainRow = new TerrainRow(terrainBox, _terrainReference,
_resolution, _progress);
yield return(terrainRow);
if (terrainRow.HasLoadedSurface)
{
terrainRow.DisposeSurface();
}
}
}
private TerrainRow ReadTerrainRow(BinaryReader reader)
{
TerrainRow row = new TerrainRow();
row.MiddlePoint = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.RightPoints[0] = row.MiddlePoint;
row.RightPoints[1] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.RightPoints[2] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.RightPoints[3] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.RightPoints[4] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.RightPoints[5] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.LeftPoints[0] = row.MiddlePoint;
row.LeftPoints[1] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.LeftPoints[2] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.LeftPoints[3] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.LeftPoints[4] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.LeftPoints[5] = new Vector3(reader.ReadInt16(), reader.ReadInt16(), -reader.ReadInt16());
row.MiddlePoint *= GameConfig.TerrainScale;
for (int i = 0; i < NbrTerrainPointsPerSide; i++)
{
row.RightPoints[i] *= GameConfig.TerrainScale;
}
for (int i = 0; i < NbrTerrainPointsPerSide; i++)
{
row.LeftPoints[i] *= GameConfig.TerrainScale;
}
// Each point is relative to the previous point
for (int i = 1; i < NbrTerrainPointsPerSide; i++)
{
row.RightPoints[i] += row.RightPoints[i - 1];
}
for (int i = 1; i < NbrTerrainPointsPerSide; i++)
{
row.LeftPoints[i] += row.LeftPoints[i - 1];
}
return(row);
}
