function GetLegendInterval(array &$spec, array &$cfg)
{
$spec['delta_size'] = $this->ComputeDeltaSize($cfg);
$iv = new INTERVAL();
$iv->SetupInterval($spec['xmin'], $spec['xmax']);
$iv->SetupWindow(INTERVAL::WINDOW_NEIGHBOURHOOD, $spec['x'], dsMathPreciseSubstract($spec['xmax'], $spec['xmin']) * $spec['delta_size'] / $this->width);
$iv->EnableFlexibility();
return $iv;
}
function GetNeighbors(MASK $mask = NULL, $x, $amount = false, $flags = 0)
{
if (!$mask) {
$mask = $this->CreateMask();
}
if ($this->base_mask) {
$mask = $this->base_mask->Superpose($mask);
}
$ivl = new INTERVAL();
$ivl->SetupWindow(INTERVAL::WINDOW_LEFT, $x);
$left = array();
$d = new RAWPoint($this, $mask, $ivl, $amount === false ? 1 : $amount);
foreach ($d as $tm => $val) {
$left[$tm] = $val;
}
$ivl->SetupWindow(INTERVAL::WINDOW_RIGHT, $x);
$right = array();
$d = new RAWPoint($this, $mask, $ivl, $amount === false ? 1 : $amount);
foreach ($d as $tm => $val) {
$right[$tm] = $val;
}
return array('left' => &$left, 'right' => &$right);
}