$inc = 50;
}
}
$x = bound(-$zx * $zz, -$drawradius, $drawradius - 25);
$y = bound($zy * $zz, -$drawradius, $drawradius - 10);
for ($v = -$mapradius; $v <= $mapradius; $v += $inc) {
$imagestring($image, 3, $cx + $x + 2, $cy - ($v - $zy) * $zz + 1, $v, $mgrey);
$imagestring($image, 3, $cx + ($v - $zx) * $zz + 2, $cy + $y + 1, $v, $mgrey);
}
}
function draw_grid($image, $mapradius, $drawradius)
{
draw_grid_lines($image, $mapradius, $drawradius);
draw_grid_labels($image, $mapradius, $drawradius);
}
draw_grid($im, 500, 256);
date_default_timezone_set("America/Los_Angeles");
$stamp1 = $words["last update"];
$stamp2 = substr($server_info['updated'], 0, 16);
/*
* Draw the rectangles
*/
$imagerectangle($im, $cx - 256, $cy - 256, $cx + 255, $cy + 255, $black);
$caption_bounds = imagettfbbox(15, 0, "arialuni", $caption);
if ($layout == "spread") {
$imagefilledrectangle($im, 0, 0, 124, 511, $white);
$imagefilledrectangle($im, 643, 0, 767, 511, $white);
$imagerectangle($im, 0, 0, 124, 511, $black);
$imagerectangle($im, 643, 0, 767, 511, $black);
// $imagestring($im, 3, 704-strlen($caption)*3.45, 10, $caption, $black);
// $imagestring($im, 3, 64-strlen($caption)*3.45, 10, $caption, $black);
function draw_data($data)
{
global $im, $cl, $iw, $ih, $xlm, $xrm, $ytm, $ybm;
sort($data);
$x_ticks = count($data);
$y_ticks = 10;
$y_scale = 1;
$prescale = 1;
$unit = 'K';
$offset = 0;
$gr_h = $ih - $ytm - $ybm;
$x_step = ($iw - $xlm - $xrm) / ($x_ticks ?: 1);
$y_step = ($ih - $ytm - $ybm) / $y_ticks;
$bar_w = $x_step / 2;
//
// determine scale
//
$low = 99999999999;
$high = 0;
for ($i = 0; $i < $x_ticks; $i++) {
if ($data[$i]['rx'] < $low) {
$low = $data[$i]['rx'];
}
if ($data[$i]['tx'] < $low) {
$low = $data[$i]['tx'];
}
if ($data[$i]['rx'] > $high) {
$high = $data[$i]['rx'];
}
if ($data[$i]['tx'] > $high) {
$high = $data[$i]['tx'];
}
}
while ($high > $prescale * $y_scale * $y_ticks) {
$y_scale = $y_scale * 2;
if ($y_scale >= 1024) {
$prescale = $prescale * 1024;
$y_scale = $y_scale / 1024;
if ($unit == 'K') {
$unit = 'M';
} else {
if ($unit == 'M') {
$unit = 'G';
} else {
if ($unit == 'G') {
$unit = 'T';
}
}
}
}
}
draw_grid($x_ticks, $y_ticks);
//
// graph scale factor (per pixel)
//
imagesetthickness($im, 1);
$sf = $prescale * $y_scale * $y_ticks / $gr_h;
if (count($data) == 0) {
$text = T('no data available');
$bbox = imagettfbbox(10, 0, GRAPH_FONT, $text);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 10, 0, ($iw - $textwidth) / 2, $ytm + 80, $cl['text'], GRAPH_FONT, $text);
} else {
//
// draw bars
//
for ($i = 0; $i < $x_ticks; $i++) {
$x = $xlm + $i * $x_step;
$y = $ytm + ($ih - $ytm - $ybm) - ($data[$i]['rx'] - $offset) / $sf;
$depth = $x_step / 8;
$space = 0;
$x1 = $x;
$y1 = $y;
$x2 = $x + $bar_w - $space;
$y2 = $ih - $ybm;
imagefilledrectangle($im, $x1, $y1, $x2, $y2, $cl['rx']);
imagerectangle($im, $x1, $y1, $x2, $y2, $cl['rx_border']);
imagefilledrectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['rx']);
imagerectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['rx_border']);
imagefilledpolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['rx']);
imagepolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['rx_border']);
imagefilledpolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['rx']);
imagepolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['rx_border']);
$y1 = $ytm + ($ih - $ytm - $ybm) - ($data[$i]['tx'] - $offset) / $sf;
$x1 = $x1 + $bar_w;
$x2 = $x2 + $bar_w;
imagefilledrectangle($im, $x1, $y1, $x2, $y2, $cl['tx']);
imagerectangle($im, $x1, $y1, $x2, $y2, $cl['tx_border']);
imagefilledrectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['tx']);
imagerectangle($im, $x1 - $depth, $y1 + $depth, $x2 - $depth, $y2 + $depth, $cl['tx_border']);
imagefilledpolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['tx']);
imagepolygon($im, array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth), 4, $cl['tx_border']);
imagefilledpolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['tx']);
imagepolygon($im, array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth), 4, $cl['tx_border']);
}
//
// axis labels
//
for ($i = 0; $i <= $y_ticks; $i++) {
$label = $i * $y_scale . $unit;
$bbox = imagettfbbox(8, 0, GRAPH_FONT, $label);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 8, 0, $xlm - $textwidth - 16, $ih - $ybm - $i * $y_step + 8 + $depth, $cl['text'], GRAPH_FONT, $label);
}
for ($i = 0; $i < $x_ticks; $i++) {
$label = $data[$i]['img_label'];
$bbox = imagettfbbox(9, 0, GRAPH_FONT, $label);
$textwidth = $bbox[2] - $bbox[0];
imagettftext($im, 9, 0, $xlm + $i * $x_step + $x_step / 2 - $textwidth / 2 - $depth - 4, $ih - $ybm + 20 + $depth, $cl['text'], GRAPH_FONT, $label);
}
}
draw_border();
//
// legend
//
imagefilledrectangle($im, $xlm, $ih - $ybm + 39, $xlm + 8, $ih - $ybm + 47, $cl['rx']);
imagerectangle($im, $xlm, $ih - $ybm + 39, $xlm + 8, $ih - $ybm + 47, $cl['text']);
imagettftext($im, 8, 0, $xlm + 14, $ih - $ybm + 48, $cl['text'], GRAPH_FONT, T('bytes in'));
imagefilledrectangle($im, $xlm + 120, $ih - $ybm + 39, $xlm + 128, $ih - $ybm + 47, $cl['tx']);
imagerectangle($im, $xlm + 120, $ih - $ybm + 39, $xlm + 128, $ih - $ybm + 47, $cl['text']);
imagettftext($im, 8, 0, $xlm + 134, $ih - $ybm + 48, $cl['text'], GRAPH_FONT, T('bytes out'));
}
$blue = ImageColorAllocate($im, 0, 0, 255);
$yellow = ImageColorAllocate($im, 255, 255, 0);
$magenta = ImageColorAllocate($im, 255, 0, 255);
$cyan = ImageColorAllocate($im, 0, 255, 255);
$l_grey = ImageColorAllocate($im, 200, 200, 200);
$color = array(-1 => imagecolorallocate($im, 100, 100, 100), 0 => ImageColorAllocate($im, 115, 255, 100), 1 => ImageColorAllocate($im, 255, 0, 0), 2 => ImageColorAllocate($im, 0, 0, 255), 3 => ImageColorAllocate($im, 255, 255, 0), 4 => ImageColorAllocate($im, 255, 0, 255), 5 => ImageColorAllocate($im, 0, 255, 255), 6 => ImageColorAllocate($im, 0, 150, 0), 7 => ImageColorAllocate($im, 120, 0, 0), 8 => ImageColorAllocate($im, 0, 0, 120), 9 => ImageColorAllocate($im, 120, 120, 0), 10 => ImageColorAllocate($im, 120, 0, 120), 11 => ImageColorAllocate($im, 0, 120, 120));
draw_axises($W, $H);
//рисуем оси координат
//вычисляем масштаб преобразования данных в координаты рабочей области
$scaleX = 1;
$scaleY = 1;
//задаем шаг для координатной сетки в пикселах
$xStep = 30;
$yStep = 30;
//рисуем координатную сетку
draw_grid($xStep, $yStep, round($xStep / $scaleX, 1), round($yStep / $scaleY, 1), true);
// ========================================================================================
// заносим данные из сессии в массив
$pointData = $_SESSION['data1'];
$coresData = $_SESSION['cores1'];
define("CORE_WEIGHT", 10);
define("POINT_WEIGHT", 3);
// рисуем все точки
for ($i = 0; $i < count($pointData); $i++) {
$point = $pointData[$i];
draw_data($point['x'], $point['y'], POINT_WEIGHT, $color[$point['class']]);
}
// выделяем ядра
for ($i = 0; $i < count($coresData); $i++) {
$point = $pointData[$coresData[$i]];
draw_data($point['x'], $point['y'], CORE_WEIGHT, $color[$point['class']], true);
function draw_data($data)
{
global $cl, $iw, $ih, $xlm, $xrm, $ytm, $ybm;
sort($data);
$x_ticks = count($data);
$y_ticks = 10;
$y_scale = 1;
$prescale = 1;
$unit = 'K';
$offset = 0;
$gr_h = $ih - $ytm - $ybm;
$x_step = ($iw - $xlm - $xrm) / $x_ticks;
$y_step = ($ih - $ytm - $ybm) / $y_ticks;
$bar_w = $x_step / 2;
//
// determine scale
//
$low = 99999999999;
$high = 0;
for ($i = 0; $i < $x_ticks; $i++) {
if ($data[$i]['rx'] < $low) {
$low = $data[$i]['rx'];
}
if ($data[$i]['tx'] < $low) {
$low = $data[$i]['tx'];
}
if ($data[$i]['rx'] > $high) {
$high = $data[$i]['rx'];
}
if ($data[$i]['tx'] > $high) {
$high = $data[$i]['tx'];
}
}
while ($high > $prescale * $y_scale * $y_ticks) {
$y_scale = $y_scale * 2;
if ($y_scale >= 1024) {
$prescale = $prescale * 1024;
$y_scale = $y_scale / 1024;
if ($unit == 'K') {
$unit = 'M';
} else {
if ($unit == 'M') {
$unit = 'G';
} else {
if ($unit == 'G') {
$unit = 'T';
}
}
}
}
}
draw_grid($x_ticks, $y_ticks);
//
// graph scale factor (per pixel)
//
$sf = $prescale * $y_scale * $y_ticks / $gr_h;
if ($data[0] == 'nodata') {
$text = 'no data available';
svg_text($iw / 2, $ytm + 80, $text, array('stroke' => $cl['text']['rgb'], 'fill' => $cl['text']['rgb'], 'stroke-width' => 0, 'font-family' => SVG_FONT, 'font-size' => '16pt', 'text-anchor' => 'middle'));
} else {
//
// draw bars
//
for ($i = 0; $i < $x_ticks; $i++) {
$x = $xlm + $i * $x_step;
$y = $ytm + ($ih - $ytm - $ybm) - ($data[$i]['rx'] - $offset) / $sf;
$depth = $x_ticks < 20 ? 8 : 6;
$space = 0;
$x1 = (int) $x;
$y1 = (int) $y;
$w = (int) ($bar_w - $space);
$h = (int) ($ih - $ybm - $y);
$x2 = (int) ($x + $bar_w - $space);
$y2 = (int) ($ih - $ybm);
svg_group(array('stroke' => $cl['rx_border']['rgb'], 'stroke-opacity' => $cl['rx_border']['opacity'], 'stroke-width' => 1, 'stroke-linejoin' => 'round', 'fill' => $cl['rx']['rgb'], 'fill-opacity' => $cl['rx']['opacity']));
svg_rect($x1, $y1, $w, $h);
svg_rect($x1 - $depth, $y1 + $depth, $w, $h);
svg_poly(array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth));
svg_poly(array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth));
svg_group_end();
$y1 = (int) ($ytm + ($ih - $ytm - $ybm) - ($data[$i]['tx'] - $offset) / $sf);
$x1 = (int) ($x1 + $bar_w);
$x2 = (int) ($x2 + $bar_w);
$w = (int) ($bar_w - $space);
$h = (int) ($ih - $ybm - $y1 - 1);
svg_group(array('stroke' => $cl['tx_border']['rgb'], 'stroke-opacity' => $cl['tx_border']['opacity'], 'stroke-width' => 1, 'stroke-linejoin' => 'round', 'fill' => $cl['tx']['rgb'], 'fill-opacity' => $cl['tx']['opacity']));
svg_rect($x1, $y1, $w, $h);
svg_rect($x1 - $depth, $y1 + $depth, $w, $h);
svg_poly(array($x1, $y1, $x2, $y1, $x2 - $depth, $y1 + $depth, $x1 - $depth, $y1 + $depth));
svg_poly(array($x2, $y1, $x2, $y2, $x2 - $depth, $y2 + $depth, $x2 - $depth, $y1 + $depth));
svg_group_end();
}
//
// axis labels
//
svg_group(array('fill' => $cl['text']['rgb'], 'fill-opacity' => $cl['text']['opacity'], 'stroke-width' => '0', 'font-family' => SVG_FONT, 'font-size' => '10pt', 'text-anchor' => 'end'));
for ($i = 0; $i <= $y_ticks; $i++) {
$label = $i * $y_scale . $unit;
$tx = $xlm - 16;
$ty = (int) ($ih - $ybm - $i * $y_step + 8 + $depth);
svg_text($tx, $ty, $label);
}
svg_group_end();
svg_group(array('fill' => $cl['text']['rgb'], 'fill-opacity' => $cl['text']['opacity'], 'stroke-width' => '0', 'font-family' => SVG_FONT, 'font-size' => '10pt', 'text-anchor' => 'middle'));
for ($i = 0; $i < $x_ticks; $i++) {
$label = $data[$i]['img_label'];
svg_text($xlm + $i * $x_step + $x_step / 2 - $depth - 4, $ih - $ybm + 20 + $depth, $label);
}
svg_group_end();
}
draw_border();
//
// legend
//
svg_rect($xlm, $ih - $ybm + 39, 8, 8, array('stroke' => $cl['text']['rgb'], 'stroke-width' => 1, 'fill' => $cl['rx']['rgb']));
svg_text($xlm + 14, $ih - $ybm + 48, T('bytes in'), array('fill' => $cl['text']['rgb'], 'stroke-width' => 0, 'font-family' => SVG_FONT, 'font-size' => '8pt'));
svg_rect($xlm + 120, $ih - $ybm + 39, 8, 8, array('stroke' => $cl['text']['rgb'], 'stroke-width' => 1, 'fill' => $cl['tx']['rgb']));
svg_text($xlm + 134, $ih - $ybm + 48, T('bytes out'), array('fill' => $cl['text']['rgb'], 'stroke-width' => 0, 'font-family' => SVG_FONT, 'font-size' => '8pt'));
}
$data_height = 1;
}
$y0 = 13 * (count($graph->stat_list) + 1) / 2 + 7;
$width = $full_width - 50;
$height = $full_height - ($y0 + 20);
$x0 = 10;
//echo $width . " " . $height . "\n";
//echo $data_width . " " . $data_height. "\n";
$im = imagecreate($full_width, $full_height);
$background = imagecolorallocate($im, 0xf8, 0xf8, 0xf0);
imagefilledrectangle($im, 0, 0, $full_width, $full_height, $background);
//$black = imagecolorallocate($im, 0, 0, 0);
$grid_color = imagecolorallocate($im, 0xb0, 0xb0, 0xb0);
$grid_low_color = imagecolorallocate($im, 0xe0, 0xe0, 0xe0);
$label_color = imagecolorallocate($im, 0x60, 0x60, 0x60);
draw_grid($im, $min_x, $min_y, $max_x, $max_y, $x0, $y0, $width, $height, $grid_low_color, $grid_color);
imagerectangle($im, $x0, $y0, $x0 + $width, $y0 + $height, $grid_color);
// x, y labels
$s = date("H:i", $min_x / 1000);
imagestring($im, 2, $x0, $y0 + $height + 2, $s, $label_color);
$s = date("H:i", $max_x / 1000);
imagestring($im, 2, $x0 + $width - 25, $y0 + $height + 2, $s, $label_color);
$s = y_label($min_y);
imagestring($im, 2, $x0 + $width + 2, $y0 + $height - 10, $s, $label_color);
$s = y_label($max_y);
imagestring($im, 2, $x0 + $width + 2, $y0, $s, $label_color);
$colors[] = array(0xff, 0x0, 0x0);
// red
$colors[] = array(0x40, 0x40, 0xff);
// blue
$colors[] = array(0xff, 0xb0, 0x0);
$x[1] = $x[0] - 0.01 * ($maxXVal - $minXVal);
$y[1] = $y[0] - 0.01 * ($maxYVal - $minYVal);
$x[2] = $x[1];
$y[2] = $y[1] + 0.02 * ($maxYVal - $minYVal);
$x[3] = $x[2] + 0.02 * ($maxXVal - $minXVal);
$y[3] = $y[2];
$x[4] = $x[3];
$y[4] = $y[3] - 0.02 * ($maxYVal - $minYVal);
$x[5] = $x[4] - 0.02 * ($maxXVal - $minXVal);
$y[5] = $y[4];
}
for ($i = 0; $i < count($x); $i++) {
$x[$i] -= $minXVal;
$y[$i] -= $minYVal;
}
draw_data($x, $y, count($x), $red);
//рисуем первый график
for ($i = 0; $i < count($x1); $i++) {
$x1[$i] -= $minXVal;
$y1[$i] -= $minYVal;
}
draw_data($x1, $y1, count($x1), $blue);
//рисуем второй график
imagefill($im, $x0 + $x1[500] * $scaleX + 1, $maxY - 1, $l_grey);
//рисуем координатную сетку
draw_grid($xStep, $yStep, round($xStep / $scaleX, 3), round($yStep / $scaleY, 5));
ImagePNG($im);
//выводим рисунок
imagedestroy($im);
//освобождаем занимаемую рисунком память
unset($_SESSION[graph_x], $_SESSION[graph_y], $_SESSION[graph_x1], $_SESSION[graph_y1]);
function graph_draw_impl($stat, $canvas, $c_width, $c_height, $names, $value_set, $start, $end, $step, $start_times)
{
global $g_colors;
global $g_label_width;
$l_margin = 50;
$r_margin = 20;
$width = $c_width - $l_margin - $r_margin;
$col = floor($width / $g_label_width);
if ($col == 0) {
$col = 1;
}
$label_height = 10 * floor((count($value_set) + $col - 1) / $col);
$b_margin = 30 + $label_height;
$t_margin = 10;
$height = $c_height - $b_margin - $t_margin;
foreach ($value_set as $name => $values) {
$bounds = calculate_bounds($bounds, $values);
}
list($x1, $y1, $x2, $y2) = $bounds;
$x1 = $start * 1000;
$x0 = $x1;
$x2 = $end * 1000;
$dx = ($x2 - $x1) / $width;
$dy = ($y2 - $y1) / $height;
if ($dx == 0) {
$dx = 1;
}
if ($dy == 0) {
$dy = 1;
}
echo "<script type='application/x-javascript'>\n";
echo "c = start_bounds('{$canvas}', {$c_width}, {$c_height}, {$l_margin}, {$t_margin});\n";
draw_grid($width, $height, $x1, $y1, $x2, $y2, 0, 0, $dx, $dy, "#c0c0c0", "#c0c0c0");
foreach ($start_times as $time) {
echo "c.save();";
echo "c.strokeStyle = '#60c000';\n";
echo "c.lineWidth = 2;\n";
echo "c.beginPath();\n";
echo "c.moveTo(" . ($time - $x0) / $dx . "," . 0 . ");\n";
echo "c.lineTo(" . ($time - $x0) / $dx . "," . $height . ");\n";
echo "c.stroke();\n";
echo "c.restore();";
}
$i = 0;
foreach ($value_set as $name => $values) {
echo "c.save();";
echo "c.strokeStyle = '" . $g_colors[$i] . "';\n";
echo "c.lineWidth = 1;\n";
echo "c.beginPath();\n";
echo "c.moveTo(" . ($values[0]->time - $x0) / $dx . "," . (($dy - $values[0]->value) / $dy + $height) . ");\n";
foreach ($values as $v) {
printf("rl(c,%.2f,%.2f);\n", ($v->time - $x0) / $dx, ($dy - $v->value) / $dy + $height);
}
$l_margin = 40;
echo "c.translate(" . ($g_label_width * floor($i % $col) - $l_margin) . ", " . ($height + 25 + 10 * floor($i / $col)) . ");";
echo "c.beginPath();";
//echo "c.strokeStyle = '" . $colors[$i] . "';";
echo "c.lineWidth = 2;";
echo "c.moveTo(0, 10);";
echo "c.lineTo(15, 10);";
echo "c.stroke();";
echo "c.beginPath();";
echo "c.font = '10px Times';\n";
echo "c.fillStyle = '#000000';\n";
$name_seg = preg_split('/[|]/', $name);
$server = array_shift($name_seg);
array_shift($name_seg);
array_shift($name_seg);
$name = join('|', $name_seg);
$text = sprintf("%s - %s", $server, $name);
$text = substr($text, 0, 40);
echo "c.fillText('" . $text . "', 20, 13);";
echo "c.restore();";
$i++;
}
echo "c.beginPath();";
echo "c.strokeStyle ='#000000';\n";
echo "c.font = '10px Monotype';\n";
echo "c.fillStyle ='#000000';\n";
echo "c.fillText('" . print_value($y1) . "', -45, " . $height . ");\n";
echo "c.fillText('" . print_value($y2) . "', -45, " . 10 . ");\n";
echo "</script>\n";
}
$im = @ImageCreate($W, $H);
$white = ImageColorAllocate($im, 255, 255, 255);
$black = ImageColorAllocate($im, 0, 0, 0);
$red = ImageColorAllocate($im, 255, 0, 0);
$green = ImageColorAllocate($im, 0, 255, 0);
$blue = ImageColorAllocate($im, 0, 0, 255);
$yellow = ImageColorAllocate($im, 255, 255, 0);
$magenta = ImageColorAllocate($im, 255, 0, 255);
$cyan = ImageColorAllocate($im, 0, 255, 255);
$l_grey = ImageColorAllocate($im, 200, 200, 200);
draw_axises($W, $H);
//рисуем оси координат
//заносим данные из сессии в массив
$tree = $_SESSION['mas'];
if (count($tree) == 0) {
draw_grid(20, 20, 1, 1, true);
ImagePNG($im);
//выводим рисунок
imagedestroy($im);
//освобождаем занимаемую рисунком память
exit;
}
//получаем максимальные значения элементов для каждого массива
$maxXVal = $_SESSION['max'];
$maxYVal = $tree['y'];
$minXVal = 0;
$minYVal = 0;
//вычисляем масштаб преобразования данных в координаты рабочей области
$scaleX = ($maxX - $x0) / ($maxXVal - $minXVal);
$scaleY = ($maxY - $y0) / ($maxYVal - $minYVal);
//задаем шаг для координатной сетки в пикселах