/// <summary>
/// Generates a terrain patch from an array of bytes; returns null if the data is invalid.
/// </summary>
/// <param name="data">The array of bytes to generate the patch from.</param>
/// <returns>See summary.</returns>
public static TerrainPatch FromByteArray(byte[] data)
{
if (data == null)
{
return null;
}
else
{
ReadOnlyCollection<Season> seasons = SeasonExtensions.GetSeasons();
BinaryReader reader = new BinaryReader(new MemoryStream(data));
try
{
// Read the patch ID
int x = reader.ReadInt32();
int y = reader.ReadInt32();
int z = reader.ReadInt32();
// Create a patch object
TerrainPatch patch = new TerrainPatch(new Point3D(x, y, z));
// Read the array of heights
for (int i = 0; i < patch.vertexHeightsArray.Length; i++)
{
patch.vertexHeightsArray[i] = reader.ReadSingle();
}
// Read terrain types for all seasons
for (int j = 0; j < seasons.Count; j++)
{
// Read the array of textures
for (int i = 0; i < patch.vertexTexturesArray[j].Length; i++)
{
patch.vertexTexturesArray[(int)seasons[j]][i] = (TerrainType)reader.ReadInt16();
}
}
// Read the number of fluids
short countFluids = reader.ReadInt16();
// Read all the fluids
for (int i = 0; i < countFluids; i++)
{
// Create a new fluid object to store on the patch
Fluid fluid = new Fluid(patch.PatchId);
// Read fluid properties for all seasons
for (int j = 0; j < seasons.Count; j++)
{
// Read the vertices
Vector3 southWest = new Vector3(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
Vector3 southEast = new Vector3(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
Vector3 northWest = new Vector3(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
Vector3 northEast = new Vector3(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
// Read the fluid type
short fluidType = reader.ReadInt16();
// Read the fluid flow direction
short flowDirection = reader.ReadInt16();
// Read the fluid flow speed
float flowSpeed = reader.ReadSingle();
// Copy the read variables into the properties of the fluid object
fluid.SetPoint(seasons[j], FluidVertex.Southwest, southWest);
fluid.SetPoint(seasons[j], FluidVertex.Southeast, southEast);
fluid.SetPoint(seasons[j], FluidVertex.Northwest, northWest);
fluid.SetPoint(seasons[j], FluidVertex.Northeast, northEast);
fluid.SetFluidType(seasons[j], (FluidType)fluidType);
fluid.SetFlowDirection(seasons[j], (FluidFlowDirection)flowDirection);
fluid.SetFlowSpeed(seasons[j], flowSpeed);
}
// Add the fluid to the patch
patch.Fluids.Add(fluid);
}
return patch;
}
catch (EndOfStreamException)
{
return null;
}
catch (IOException)
{
return null;
}
finally
{
reader.Close();
}
}
}
