public static void GenerateChunkVertices(TerrainUpdater updater, TerrainChunk chunk, int x1, int z1, int x2, int z2)
{
if (chunk.ThreadState == TerrainChunkState.InvalidVertices1)
{
Data.Remove(chunk.Coords);
}
Terrain terrain = updater.m_terrain;
TerrainChunk chunkAtCoords = terrain.GetChunkAtCoords(chunk.Coords.X - 1, chunk.Coords.Y - 1);
TerrainChunk chunkAtCoords2 = terrain.GetChunkAtCoords(chunk.Coords.X, chunk.Coords.Y - 1);
TerrainChunk chunkAtCoords3 = terrain.GetChunkAtCoords(chunk.Coords.X + 1, chunk.Coords.Y - 1);
TerrainChunk chunkAtCoords4 = terrain.GetChunkAtCoords(chunk.Coords.X - 1, chunk.Coords.Y);
TerrainChunk chunkAtCoords5 = terrain.GetChunkAtCoords(chunk.Coords.X + 1, chunk.Coords.Y);
TerrainChunk chunkAtCoords6 = terrain.GetChunkAtCoords(chunk.Coords.X - 1, chunk.Coords.Y + 1);
TerrainChunk chunkAtCoords7 = terrain.GetChunkAtCoords(chunk.Coords.X, chunk.Coords.Y + 1);
TerrainChunk chunkAtCoords8 = terrain.GetChunkAtCoords(chunk.Coords.X + 1, chunk.Coords.Y + 1);
if (chunkAtCoords4 == null)
{
x1 = MathUtils.Max(x1, 1);
}
if (chunkAtCoords2 == null)
{
z1 = MathUtils.Max(z1, 1);
}
if (chunkAtCoords5 == null)
{
x2 = MathUtils.Min(x2, 15);
}
if (chunkAtCoords7 == null)
{
z2 = MathUtils.Min(z2, 15);
}
for (int i = x1; i < x2; i++)
{
for (int j = z1; j < z2; j++)
{
switch (i)
{
case 0:
if ((j == 0 && chunkAtCoords == null) || (j == 15 && chunkAtCoords6 == null))
{
continue;
}
break;
case 15:
if ((j == 0 && chunkAtCoords3 == null) || (j == 15 && chunkAtCoords8 == null))
{
continue;
}
break;
}
int num = i + chunk.Origin.X;
int num2 = j + chunk.Origin.Y;
int bottomHeightFast = chunk.GetBottomHeightFast(i, j);
int bottomHeight = terrain.GetBottomHeight(num - 1, num2);
int bottomHeight2 = terrain.GetBottomHeight(num + 1, num2);
int bottomHeight3 = terrain.GetBottomHeight(num, num2 - 1);
int bottomHeight4 = terrain.GetBottomHeight(num, num2 + 1);
int x3 = MathUtils.Min(bottomHeightFast - 1, MathUtils.Min(bottomHeight, bottomHeight2, bottomHeight3, bottomHeight4));
int topHeightFast = chunk.GetTopHeightFast(i, j);
int num3 = MathUtils.Max(x3, 1);
topHeightFast = MathUtils.Min(topHeightFast, 126);
int num4 = TerrainChunk.CalculateCellIndex(i, 0, j);
for (int k = num3; k <= topHeightFast; k++)
{
int cellValueFast = chunk.GetCellValueFast(num4 + k);
int num5 = Terrain.ExtractContents(cellValueFast);
if (num5 != 0)
{
BlocksManager.Blocks[num5].GenerateTerrainVertices(updater.m_subsystemTerrain.BlockGeometryGenerator, chunk.Geometry, cellValueFast, num, k, num2);
chunk.GeometryMinY = MathUtils.Min(chunk.GeometryMinY, k);
chunk.GeometryMaxY = MathUtils.Max(chunk.GeometryMaxY, k);
}
}
}
}
}
