private function init(S2CellId $id)
{
$this->cellId = $id;
$ij = array(0, 0);
$mOrientation = 0;
// echo " $mOrientation\n";
$this->face = $id->toFaceIJOrientation($ij[0], $ij[1], $mOrientation);
// echo ">> $mOrientation\n";
$this->orientation = $mOrientation;
$this->level = $id->level();
$cellSize = 1 << S2CellId::MAX_LEVEL - $this->level;
for ($d = 0; $d < 2; ++$d) {
// Compute the cell bounds in scaled (i,j) coordinates.
$sijLo = ($ij[$d] & -$cellSize) * 2 - self::MAX_CELL_SIZE;
$sijHi = $sijLo + $cellSize * 2;
$this->uv[$d][0] = S2Projections::stToUV(1.0 / self::MAX_CELL_SIZE * $sijLo);
$this->uv[$d][1] = S2Projections::stToUV(1.0 / self::MAX_CELL_SIZE * $sijHi);
}
}
