public void UpdateChunkMesh(World world, Chunk chunk, BlockTransparency transparency, IMesh <VertexP3N3T2> mesh)
{
Task.Run(() => {
var vertexes = GetChunkVertexes(world, chunk, transparency);
Client.DeferredTasks.Enqueue(() => { mesh.SetData(vertexes); });
});
}
private BlockType(string name, BlockTextures textures,
BlockTransparency transparency = BlockTransparency.Opaque, bool solid = true)
{
Name = name;
Textures = textures;
Solid = solid;
Transparency = transparency;
}
private VertexP3N3T2[] GetChunkVertexes(World world, Chunk chunk, BlockTransparency transparency)
{
// Non-empty natural generated chunks have an average of 50k vertexes.
// Use the next power of two for the initial capacity to avoid unnecessary allocations.
var vertexes = new List <VertexP3N3T2>(65536);
for (var i = 0; i < Chunk.Length; ++i)
{
for (var j = 0; j < Chunk.Width; ++j)
{
for (var k = 0; k < Chunk.Height; ++k)
{
var block = chunk.Blocks[i, j, k];
if (block.Transparency != transparency)
{
continue;
}
var rearBlock = world.GetBlockAt(chunk.Min + new Vector3(i - 1, j, k));
var rearVisible = !rearBlock.HasValue || rearBlock.Value.Transparency > block.Transparency;
if (rearVisible)
{
var normal = -Vector3.UnitX;
var textureName = block.Textures.Rear;
var textureRegion = blockTextureAtlas.GetRegion(textureName);
var uvZero = textureRegion.UVMin;
var uvOne = textureRegion.UVMax;
var uvUnitX = new Vector2(uvOne.X, uvZero.Y);
var uvUnitY = new Vector2(uvZero.X, uvOne.Y);
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, 1 + k), normal, uvUnitY));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, k), normal, uvUnitX));
}
var frontBlock = world.GetBlockAt(chunk.Min + new Vector3(i + 1, j, k));
var frontVisible = !frontBlock.HasValue || frontBlock.Value.Transparency > block.Transparency;
if (frontVisible)
{
var normal = Vector3.UnitX;
var textureName = block.Textures.Front;
var textureRegion = blockTextureAtlas.GetRegion(textureName);
var uvZero = textureRegion.UVMin;
var uvOne = textureRegion.UVMax;
var uvUnitX = new Vector2(uvOne.X, uvZero.Y);
var uvUnitY = new Vector2(uvZero.X, uvOne.Y);
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, 1 + k), normal, uvUnitY));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, k), normal, uvUnitX));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, 1 + k), normal, uvOne));
}
var leftBlock = world.GetBlockAt(chunk.Min + new Vector3(i, j - 1, k));
var leftVisible = !leftBlock.HasValue || leftBlock.Value.Transparency > block.Transparency;
if (leftVisible)
{
var normal = -Vector3.UnitY;
var textureName = block.Textures.Left;
var textureRegion = blockTextureAtlas.GetRegion(textureName);
var uvZero = textureRegion.UVMin;
var uvOne = textureRegion.UVMax;
var uvUnitX = new Vector2(uvOne.X, uvZero.Y);
var uvUnitY = new Vector2(uvZero.X, uvOne.Y);
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, 1 + k), normal, uvUnitY));
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, k), normal, uvUnitX));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, 1 + k), normal, uvOne));
}
var rightBlock = world.GetBlockAt(chunk.Min + new Vector3(i, j + 1, k));
var rightVisible = !rightBlock.HasValue || rightBlock.Value.Transparency > block.Transparency;
if (rightVisible)
{
var normal = Vector3.UnitY;
var textureName = block.Textures.Right;
var textureRegion = blockTextureAtlas.GetRegion(textureName);
var uvZero = textureRegion.UVMin;
var uvOne = textureRegion.UVMax;
var uvUnitX = new Vector2(uvOne.X, uvZero.Y);
var uvUnitY = new Vector2(uvZero.X, uvOne.Y);
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, 1 + k), normal, uvUnitY));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, k), normal, uvUnitX));
}
var bottomBlock = world.GetBlockAt(chunk.Min + new Vector3(i, j, k - 1));
var bottomVisible =
!bottomBlock.HasValue || bottomBlock.Value.Transparency > block.Transparency;
if (bottomVisible)
{
var normal = -Vector3.UnitZ;
var textureName = block.Textures.Bottom;
var textureRegion = blockTextureAtlas.GetRegion(textureName);
var uvZero = textureRegion.UVMin;
var uvOne = textureRegion.UVMax;
var uvUnitX = new Vector2(uvOne.X, uvZero.Y);
var uvUnitY = new Vector2(uvZero.X, uvOne.Y);
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, k), normal, uvUnitY));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, k), normal, uvUnitX));
}
var topBlock = world.GetBlockAt(chunk.Min + new Vector3(i, j, k + 1));
var topVisible = !topBlock.HasValue || topBlock.Value.Transparency > block.Transparency;
if (topVisible)
{
var normal = Vector3.UnitZ;
var textureName = block.Textures.Top;
var textureRegion = blockTextureAtlas.GetRegion(textureName);
var uvZero = textureRegion.UVMin;
var uvOne = textureRegion.UVMax;
var uvUnitX = new Vector2(uvOne.X, uvZero.Y);
var uvUnitY = new Vector2(uvZero.X, uvOne.Y);
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, 1 + k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, 1 + k), normal, uvOne));
vertexes.Add(new VertexP3N3T2(new Vector3(i, 1 + j, 1 + k), normal, uvUnitY));
vertexes.Add(new VertexP3N3T2(new Vector3(i, j, 1 + k), normal, uvZero));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, j, 1 + k), normal, uvUnitX));
vertexes.Add(new VertexP3N3T2(new Vector3(1 + i, 1 + j, 1 + k), normal, uvOne));
}
}
}
}
return(vertexes.ToArray());
}
public IMesh <VertexP3N3T2> CreateChunkMesh(World world, Chunk chunk, BlockTransparency transparency)
{
var vertexes = GetChunkVertexes(world, chunk, transparency);
return(meshFactory.Create(vertexes));
}
