static bool IsChunkOnDisk(ChunkIndex index)
{
return File.Exists(GetChunkFilename(index));
}
static Chunk ObtainChunk(ChunkIndex index, bool setup = false)
{
ChunkIndex? actualIndex = GetArrayIndex(index);
Chunk chunk;
if (actualIndex.HasValue && !setup)
{
chunk = Chunks[actualIndex.Value.X, actualIndex.Value.Y, actualIndex.Value.Z];
}
else
{
chunk = new Chunk(index);
if (IsChunkOnDisk(index))
{
Setup.AddToLoad(chunk);
}
else
{
TerrainGenerator.SetChunkTerrain(chunk);
Console.Write("Chunk terrain generated!");
}
}
return chunk;
}
private static ChunkIndex? GetArrayIndex(ChunkIndex index, ChunkIndex center)
{
if (index.X >= center.X - Constants.World.WorldSize / 2 && index.X <= center.X + Constants.World.WorldSize / 2 &&
index.Y >= center.Y - Constants.World.WorldSize / 2 && index.Y <= center.Y + Constants.World.WorldSize / 2 &&
index.Z >= center.Z - Constants.World.WorldSize / 2 && index.Z <= center.Z + Constants.World.WorldSize / 2)
{
return new ChunkIndex(EuclideanModulo(index.X, Constants.World.WorldSize), EuclideanModulo(index.Y, Constants.World.WorldSize), EuclideanModulo(index.Z, Constants.World.WorldSize));
}
return null;
}
static string GetChunkFilename(ChunkIndex index)
{
return Constants.Content.Data.ChunkFilePath + index.ToString() + Constants.Content.Data.ChunkFileExtension;
}
public static void UpdateCenter(ChunkIndex centerIndex)
{
for (int x = -Constants.World.WorldSize / 2; x <= Constants.World.WorldSize / 2; x++)
{
for (int y = -Constants.World.WorldSize / 2; y <= Constants.World.WorldSize / 2; y++)
{
for (int z = -Constants.World.WorldSize / 2; z <= Constants.World.WorldSize / 2; z++)
{
Chunk chunk = ObtainChunk(centerIndex + new ChunkIndex(x, y, z), true);
ChunkIndex? index = GetArrayIndex(centerIndex + new ChunkIndex(x, y, z), centerIndex);
Chunks[index.Value.X, index.Value.Y, index.Value.Z] = chunk;
ChangeChunk(chunk);
}
}
}
CenterIndex = centerIndex;
}
private static ChunkIndex? GetArrayIndex(ChunkIndex index)
{
return GetArrayIndex(index, CenterIndex);
}
public static Chunk LoadChunk(ChunkIndex index)
{
Chunk returnChunk = new Chunk(index);
return returnChunk;
}
public static void Initialize()
{
InitializeThreads();
Chunks = new Chunk[Constants.World.WorldSize, Constants.World.WorldSize, Constants.World.WorldSize];
CenterIndex = new ChunkIndex(Constants.Engines.Physics.Player.Position);
RenderHelp.CreateBlockData3DArray(out DataID);
for (int x = -Constants.World.WorldSize / 2; x <= Constants.World.WorldSize / 2; x++)
{
for (int y = -Constants.World.WorldSize / 2; y <= Constants.World.WorldSize / 2; y++)
{
for (int z = -Constants.World.WorldSize / 2; z <= Constants.World.WorldSize / 2; z++)
{
Chunk chunk = ObtainChunk(CenterIndex + new ChunkIndex(x, y, z), true);
ChunkIndex? index = GetArrayIndex(CenterIndex + new ChunkIndex(x, y, z));
Chunks[index.Value.X, index.Value.Y, index.Value.Z] = chunk;
TerrainGenerator.SetChunkTerrain(chunk);
ChangeChunk(chunk);
}
}
}
//SetupThread.Start();
}
public static Chunk GetChunk(ChunkIndex index)
{
ChunkIndex? arrayIndex = GetArrayIndex(index);
if (!arrayIndex.HasValue)
{
return null;
}
return Chunks[arrayIndex.Value.X, arrayIndex.Value.Y, arrayIndex.Value.Z];
}
Block[, ,] Data; // Must be in the format Z Y X, or else copying to memory will be in the wrong order
#endregion Fields
#region Constructors
public Chunk(ChunkIndex index)
{
Index = index;
Data = new Block[Constants.World.ChunkSize, Constants.World.ChunkSize, Constants.World.ChunkSize];
}
private static int[,] GetHeightMap(ChunkIndex index)
{
int squareSize = (int)Math.Pow(2, Constants.Landscape.TerrainStretch);
int x = (int)index.Position.X;
int y = (int)index.Position.Z;
int xInSquare = Mathematics.AbsModulo(x, squareSize);
int yInSquare = Mathematics.AbsModulo(y, squareSize);
float[,] dataPoints = new float[4, 4];
dataPoints[0, 0] = NoiseMaps.GetPerlin(x - xInSquare - squareSize, y - yInSquare - squareSize, Seed);
dataPoints[0, 1] = NoiseMaps.GetPerlin(x - xInSquare - squareSize, y - yInSquare, Seed);
dataPoints[0, 2] = NoiseMaps.GetPerlin(x - xInSquare - squareSize, y - yInSquare + squareSize, Seed);
dataPoints[0, 3] = NoiseMaps.GetPerlin(x - xInSquare - squareSize, y - yInSquare + squareSize * 2, Seed);
dataPoints[1, 0] = NoiseMaps.GetPerlin(x - xInSquare, y - yInSquare - squareSize, Seed);
dataPoints[1, 1] = NoiseMaps.GetPerlin(x - xInSquare, y - yInSquare, Seed);
dataPoints[1, 2] = NoiseMaps.GetPerlin(x - xInSquare, y - yInSquare + squareSize, Seed);
dataPoints[1, 3] = NoiseMaps.GetPerlin(x - xInSquare, y + y - yInSquare + squareSize * 2, Seed);
dataPoints[2, 0] = NoiseMaps.GetPerlin(x - xInSquare + squareSize, y - yInSquare - squareSize, Seed);
dataPoints[2, 1] = NoiseMaps.GetPerlin(x - xInSquare + squareSize, y - yInSquare, Seed);
dataPoints[2, 2] = NoiseMaps.GetPerlin(x - xInSquare + squareSize, y - yInSquare + squareSize, Seed);
dataPoints[2, 3] = NoiseMaps.GetPerlin(x - xInSquare + squareSize, y - yInSquare + squareSize * 2, Seed);
dataPoints[3, 0] = NoiseMaps.GetPerlin(x - xInSquare + squareSize * 2, y - yInSquare - squareSize, Seed);
dataPoints[3, 1] = NoiseMaps.GetPerlin(x - xInSquare + squareSize * 2, y - yInSquare, Seed);
dataPoints[3, 2] = NoiseMaps.GetPerlin(x - xInSquare + squareSize * 2, y - yInSquare + squareSize, Seed);
dataPoints[3, 3] = NoiseMaps.GetPerlin(x - xInSquare + squareSize * 2, y - yInSquare + squareSize * 2, Seed);
Interpolation.UpdateBicubicCoefficients(dataPoints);
int[,] data = new int[Constants.World.ChunkSize, Constants.World.ChunkSize];
int xBlockInSquare = 0;
int yBlockInSquare = 0;
for (int blockX = 0; blockX < Constants.World.ChunkSize; blockX++)
{
for (int blockY = 0; blockY < Constants.World.ChunkSize; blockY++)
{
xBlockInSquare = blockX + xInSquare;
yBlockInSquare = blockY + yInSquare;
data[blockX, blockY] = (int)(Interpolation.Linear(
NoiseMaps.GetPerlin(x + blockX, y + blockY, Seed),
Interpolation.Bicubic((float)xBlockInSquare / (float)squareSize, (float)yBlockInSquare / (float)squareSize),
Constants.Landscape.PerlinBicubicWeight
) * Constants.Landscape.WorldHeightAmplitude) + Constants.Landscape.WorldHeightOffset;
}
}
return data;
}