// TODO: let consumers of IChunkMesh set its effect, so consumers can let it be transparent.
public override Buffer <VertexPositionColorTexture> Meshalyze(IEditorGame game, BlockSelection volume)
{
var chunkVerticesList = new List <VertexPositionColorTexture>(13000);
volume.GetChunks(AccessMode.Read, portions =>
{
foreach (var partition in portions)
{
var chunk = partition.Chunk;
var blocks = chunk.Blocks;
for (var y = partition.YMin; y < partition.YMax; y++)
{
for (var x = partition.XMin; x < partition.XMax; x++)
{
for (var z = partition.ZMin; z < partition.ZMax; z++)
{
var block = blocks.GetBlock(x, y, z);
if (block.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
continue;
}
var blockVector = new Vector3(x, y, z);
// block isn't air, assume its solid.
// at this point, texture coordinates should be calculated
// block specific shapes should happen (eg water)
if (x + 1 < blocks.XDim)
{
// face with normal x+
var xPlusBlock = blocks.GetBlock(x + 1, y, z);
if (xPlusBlock.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
AddTriangleQuad(blockVector, GeometricPrimitives.RightQuad, chunkVerticesList,
GetVertexColor(chunk, new LocalBlockPosition(x, y, z),
new LocalBlockPosition(x + 1, y, z)));
}
}
if (y + 1 < blocks.YDim)
{
var yPlusBlock = blocks.GetBlock(x, y + 1, z);
if (yPlusBlock.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
AddTriangleQuad(blockVector, GeometricPrimitives.TopQuad, chunkVerticesList,
GetVertexColor(chunk, new LocalBlockPosition(x, y, z),
new LocalBlockPosition(x, y + 1, z)));
}
}
if (z + 1 < blocks.ZDim)
{
var zPlusBlock = blocks.GetBlock(x, y, z + 1);
if (zPlusBlock.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
AddTriangleQuad(blockVector, GeometricPrimitives.BackwardQuad,
chunkVerticesList,
GetVertexColor(chunk, new LocalBlockPosition(x, y, z),
new LocalBlockPosition(x, y, z + 1)));
}
}
if (x - 1 >= 0)
{
var xMinusBlock = blocks.GetBlock(x - 1, y, z);
if (xMinusBlock.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
AddTriangleQuad(blockVector, GeometricPrimitives.LeftQuad, chunkVerticesList,
GetVertexColor(chunk, new LocalBlockPosition(x, y, z),
new LocalBlockPosition(x - 1, y, z)));
}
}
if (y - 1 >= 0)
{
var yMinusBlock = blocks.GetBlock(x, y - 1, z);
if (yMinusBlock.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
AddTriangleQuad(blockVector, GeometricPrimitives.BottomQuad, chunkVerticesList,
GetVertexColor(chunk, new LocalBlockPosition(x, y, z),
new LocalBlockPosition(x, y - 1, z)));
}
}
if (z - 1 >= 0)
{
var zMinusBlock = blocks.GetBlock(x, y, z - 1);
if (zMinusBlock.Info.State == BlockState.NONSOLID || block.Info.State == BlockState.FLUID)
{
AddTriangleQuad(blockVector, GeometricPrimitives.ForwardQuad, chunkVerticesList,
GetVertexColor(chunk, new LocalBlockPosition(x, y, z),
new LocalBlockPosition(x, y, z - 1)));
}
}
}
}
}
}
});
return(chunkVerticesList.Count == 0
? null
: Buffer.Vertex.New(game.GraphicsDevice, chunkVerticesList.ToArray()));
}