4D Surface Chart

[File: phpdemo/surface4d.php]
<?php
require_once("../lib/phpchartdir.php");

function createChart($viewer, $chartIndex)
{
    # The x and y coordinates of the grid
    $dataX = array(-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
    $dataY = array(-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

    # The values at the grid points. In this example, we will compute the values using the formula z
    # = x * sin(y) + y * sin(x).
    $dataZ = array_fill(0, count($dataX) * count($dataY), 0);
    for($yIndex = 0; $yIndex < count($dataY); ++$yIndex) {
        $y = $dataY[$yIndex];
        for($xIndex = 0; $xIndex < count($dataX); ++$xIndex) {
            $x = $dataX[$xIndex];
            $dataZ[$yIndex * count($dataX) + $xIndex] = $x * sin($y) + $y * sin($x);
        }
    }

    # Create a SurfaceChart object of size 460 x 460 pixels, with white (ffffff) background and grey
    # (888888) border.
    $c = new SurfaceChart(460, 460, 0xffffff, 0x888888);

    # Add a color axis at the top center of the chart, with labels at the bottom side
    $cAxis = $c->setColorAxis($c->getWidth() / 2, 10, Top, 250, Bottom);

    # If the color is based on the z-values, the color axis will synchronize with the z-axis. (The
    # Axis.syncAxis can be used to disable that.) Otherwise, the color axis will auto-scale
    # independently. In the latter case, we set the tick spacing to at least 20 pixels.
    $cAxis->setTickDensity(20);

    # Set flat color axis style
    $cAxis->setAxisBorder(Transparent, 0);

    if ($chartIndex == 0) {
        # The default is to use the Z values to determine the color.
        $cAxis->setTitle("Color based on Z", "Arial Bold", 15);
        $c->setData($dataX, $dataY, $dataZ);
    } else if ($chartIndex == 1) {
        # ChartDirector supports using an extra value (called W value) to determine the color.
        $cAxis->setTitle("Color based on W", "Arial Bold", 15);

        # Use random W values
        $r = new RanSeries(5);
        $dataW = $r->get2DSeries(count($dataX), count($dataY), 0.5, 9.5);
        $c->setData($dataX, $dataY, $dataZ, $dataW);
    } else if ($chartIndex == 2) {
        # We can set the W values to the X coordinates. The color will then be determined by the X
        # coordinates.
        $cAxis->setTitle("Color based on X", "Arial Bold", 15);
        $colorX = array_fill(0, count($dataZ), 0);
        for($yIndex = 0; $yIndex < count($dataY); ++$yIndex) {
            for($xIndex = 0; $xIndex < count($dataX); ++$xIndex) {
                $colorX[$yIndex * count($dataX) + $xIndex] = $dataX[$xIndex];
            }
        }
        $c->setData($dataX, $dataY, $dataZ, $colorX);
    } else {
        # We can set the W values to the Y coordinates. The color will then be determined by the Y
        # coordinates.
        $cAxis->setTitle("Color based on Y", "Arial Bold", 15);
        $colorY = array_fill(0, count($dataZ), 0);
        for($yIndex = 0; $yIndex < count($dataY); ++$yIndex) {
            for($xIndex = 0; $xIndex < count($dataX); ++$xIndex) {
                $colorY[$yIndex * count($dataX) + $xIndex] = $dataY[$yIndex];
            }
        }
        $c->setData($dataX, $dataY, $dataZ, $colorY);
    }

    # Set the center of the plot region at (230, 250), and set width x depth x height to 240 x 240 x
    # 170 pixels
    $c->setPlotRegion(230, 250, 240, 240, 170);

    # Set the plot region wall thichness to 3 pixels
    $c->setWallThickness(3);

    # Set the elevation and rotation angles to 45 degrees
    $c->setViewAngle(45, 45);

    # Set the perspective level to 20
    $c->setPerspective(20);

    # Spline interpolate data to a 50 x 50 grid for a smooth surface
    $c->setInterpolation(50, 50);

    # Add the axis titles
    $c->xAxis->setTitle("X-Axis", "Arial Bold", 10);
    $c->yAxis->setTitle("Y-Axis", "Arial Bold", 10);
    $c->zAxis->setTitle("Z Axis", "Arial Bold", 10);

    # Output the chart
    $viewer->setChart($c, SVG);
}

# This example includes 4 charts
$viewers = array();
for ($i = 0; $i < 4; ++$i) {
    $viewers[$i] = new WebChartViewer("chart$i");
    createChart($viewers[$i], $i);
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>4D Surface Chart</title>
    <!-- Include ChartDirector Javascript Library to support chart interactions -->
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        4D Surface Chart
    </div>
    <hr style="border:solid 1px #000080; background:#000080" />
    <div style="font:10pt verdana; margin-bottom:1.5em">
        <a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a>
    </div>
    <!-- ****** Here are the chart images ****** -->
    <?php
        for ($i = 0; $i < count($viewers); ++$i) {
            echo $viewers[$i]->renderHTML(), " ";
        }
    ?>
</body>
</html>