void MeshSimpleSide(BlockSide side)
{
ClientSection?neighbor = neighbors[(int)side];
Block? blockToCheck;
Vector3i checkPos = side.Offset(pos);
if (IsPositionOutOfSection(checkPos))
{
checkPos = checkPos.Mod(SectionSize);
bool atVerticalEnd = side is BlockSide.Top or BlockSide.Bottom;
blockToCheck = neighbor?.GetBlock(checkPos) ??
(atVerticalEnd ? Block.Air : null);
}
else
{
blockToCheck = GetBlock(checkPos);
}
if (blockToCheck == null)
{
return;
}
if (!blockToCheck.IsFull ||
!blockToCheck.IsOpaque && (currentBlock.IsOpaque ||
currentBlock.RenderFaceAtNonOpaques ||
blockToCheck.RenderFaceAtNonOpaques))
{
BlockMeshData mesh = currentBlock.GetMesh(
BlockMeshInfo.Simple(side, data, currentLiquid));
side.Corners(out int[] a, out int[] b, out int[] c, out int[] d);
int[][] uvs = BlockModels.GetBlockUVs(mesh.IsTextureRotated);
// int: uv-- ---- ---- -xxx xxyy yyyz zzzz (uv: texture coords; xyz: position)
int upperDataA = (uvs[0][0] << 31) | (uvs[0][1] << 30) | ((a[0] + x) << 10) |
((a[1] + y) << 5) | (a[2] + z);
int upperDataB = (uvs[1][0] << 31) | (uvs[1][1] << 30) | ((b[0] + x) << 10) |
((b[1] + y) << 5) | (b[2] + z);
int upperDataC = (uvs[2][0] << 31) | (uvs[2][1] << 30) | ((c[0] + x) << 10) |
((c[1] + y) << 5) | (c[2] + z);
int upperDataD = (uvs[3][0] << 31) | (uvs[3][1] << 30) | ((d[0] + x) << 10) |
((d[1] + y) << 5) | (d[2] + z);
// int: tttt tttt t--n nn-a ---i iiii iiii iiii (t: tint; n: normal; a: animated; i: texture index)
int lowerData = (mesh.Tint.GetBits(blockTint) << 23) | ((int)side << 18) |
mesh.GetAnimationBit(shift: 16) | mesh.TextureIndex;
blockMeshFaceHolders[(int)side].AddFace(
pos,
lowerData,
(upperDataA, upperDataB, upperDataC, upperDataD),
mesh.IsTextureRotated);
}
}