public void FillSpace(
PackedSpace t0Space,
PackedSpace tm1Space,
PackedSpace tm2Space
)
{
var cellSizeBits = packer.cellSizeBits;
var cellsPerPack = packer.cellsPerPack;
var ss = t0Space.spaceSize;
var ps = t0Space.packedSize;
var n = tablePackN;
var tableN = tablePackedNCell;
var nCellShift = n * cellSizeBits;
var np2CellShift = (n + 2) * cellSizeBits;
var np2CellMask = (1 << np2CellShift) - 1;
var indexSize = n + n + 2;
var combinedStateShift = indexSize * cellSizeBits;
var combinedStateMask = ~(-1 << combinedStateShift);
int GetStateNCell(int _pcn, int _n1cnn2)
{
var combinedState =
((_pcn << np2CellShift) | (_n1cnn2 & np2CellMask))
& combinedStateMask;
return(tableN[combinedState]);
}
for (var px = 0; px < ps; px++)
{
var ptm1n1 = (px - 1 >= 0) ? tm1Space.packed[px - 1] : 0;
var ptm1c = tm1Space.packed[px];
var ptm1n2 = (px + 1 < ps) ? tm1Space.packed[px + 1] : 0;
var ptm2c = tm2Space.packed[px];
int pack = 0;
var _ptm1c = packer.AppendToPack(ptm1n1, ptm1c, cellsPerPack - 1);
for (var sx = 0; sx < cellsPerPack - 2; sx += n)
{
var shift = sx * cellSizeBits;
var state = GetStateNCell(ptm2c >> shift, _ptm1c >> shift);
pack |= state << shift;
}
_ptm1c = packer.AppendToPack(ptm1c, ptm1n2, 1);
pack = pack & ~(-1 << ((cellsPerPack - 2) * cellSizeBits));
for (var sx = cellsPerPack - 2; sx < cellsPerPack; sx += n)
{
var shift = sx * cellSizeBits;
var state = GetStateNCell(
ptm2c >> shift, _ptm1c >> (shift - 2 * cellSizeBits));
pack |= state << shift;
}
t0Space.packed[px] = pack;
}
}
