private MH2O.MH2ORenderMask GetRenderMask(MH2O.MH2OHeader header, MH2O.MH2OInformation information)
{
var stream = Chunk.GetStream();
// Read the render mask
stream.Seek(Chunk.Offset + header.ofsRender, SeekOrigin.Begin);
var renderMask = new MH2O.MH2ORenderMask();
renderMask.Read(Chunk.GetReader());
// Render mask
if ((renderMask.Mask.All(b => b == 0) || (information.Width == 8 && information.Height == 8)) && information.ofsMask2 != 0)
{
stream.Seek(Chunk.Offset + information.ofsMask2, SeekOrigin.Begin);
var altMask = new byte[(int)Math.Ceiling(information.Width * information.Height / 8.0f)];
stream.Read(altMask, 0, altMask.Length);
for (int i = 0; i < altMask.Length; i++)
renderMask.Mask[i + information.YOffset] |= altMask[i];
}
return renderMask;
}
public void Read()
{
if (Chunk == null) return;
Vertices = new List<Vector3>();
Indices = new List<Triangle<uint>>();
var stream = Chunk.GetStream();
MH2O = new MH2O();
MH2O.Read(Chunk.GetReader());
HeightMaps = new Chunks.MH2O.MH2OHeightmapData[256];
var tilePos = ADT.TilePosition;
for (int i = 0; i < MH2O.Headers.Length; i++)
{
var header = MH2O.Headers[i];
if (header == null || header.LayerCount == 0) continue;
stream.Seek(Chunk.Offset + header.ofsInformation, SeekOrigin.Begin);
var information = new MH2O.MH2OInformation();
information.Read(Chunk.GetReader());
// Ensure we have heightmap data
if (information.ofsHeightmapData == 0) continue;
// Not an ocean, lets grab the height map and render mask
MH2O.MH2OHeightmapData heightMap;
if (!IsOcean(information.LiquidObjectId, information.LiquidTypeId))
{ // Read the height map
stream.Seek(Chunk.Offset + information.ofsHeightmapData, SeekOrigin.Begin);
heightMap = new MH2O.MH2OHeightmapData();
heightMap.Read(Chunk.GetReader());
heightMap.RenderMask = GetRenderMask(header, information);
}
else
{
heightMap = GetOceanHeightMap(information.MinHeightLevel);
}
HeightMaps[i] = heightMap;
var basePos = new Vector3(tilePos.X - (Constants.ChunkSize * (i % 16)), tilePos.Y - (Constants.ChunkSize * (i / 16)), 0);
for (int y = information.YOffset; y < (information.YOffset + information.Height); y++)
{
for (int x = information.XOffset; x < (information.XOffset + information.Width); x++)
{
if (!heightMap.RenderMask.ShouldRender(x, y))
continue;
var v = new Vector3(basePos.Y - (x * Constants.UnitSize), basePos.X - (y * Constants.UnitSize), heightMap.Heightmap[x, y]);
var vo = (uint)Vertices.Count;
Vertices.Add(v);
Vertices.Add(new Vector3(v.X - Constants.UnitSize, v.Y, v.Z));
Vertices.Add(new Vector3(v.X, v.Y - Constants.UnitSize, v.Z));
Vertices.Add(new Vector3(v.X - Constants.UnitSize, v.Y - Constants.UnitSize, v.Z));
Indices.Add(new Triangle<uint>(TriangleType.Water, vo, vo + 2, vo + 1));
Indices.Add(new Triangle<uint>(TriangleType.Water, vo + 2, vo + 3, vo + 1));
}
}
}
}
