Example #1
0
            $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, $black);
Example #2
0
function draw_data($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'));
}
Example #3
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);
$color = array(-1 => imagecolorallocate($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);
Example #4
0
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);
Example #6
0
    $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";
}
Example #8
0
$im = @ImageCreate($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