Surface Perspective

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

function createChart($viewer, $chartIndex)
{
    # The x and y coordinates of the grid
    $dataX = array(0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0);
    $dataY = array(0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0);

    # The values at the grid points. In this example, we will compute the values using the formula z
    # = sin((x - 0.5) * 2 * pi) * sin((y - 0.5) * 2 * pi)
    $dataZ = array_fill(0, count($dataX) * count($dataY), 0);
    for($yIndex = 0; $yIndex < count($dataY); ++$yIndex) {
        $y = ($dataY[$yIndex] - 0.5) * 2 * 3.1416;
        for($xIndex = 0; $xIndex < count($dataX); ++$xIndex) {
            $x = ($dataX[$xIndex] - 0.5) * 2 * 3.1416;
            $dataZ[$yIndex * count($dataX) + $xIndex] = sin($x) * sin($y);
        }
    }

    # the perspective level
    $perspective = $chartIndex * 12;

    # Create a SurfaceChart object of size 360 x 360 pixels, with white (ffffff) background and grey
    # (888888) border.
    $c = new SurfaceChart(360, 360, 0xffffff, 0x888888);

    # Set the perspective level
    $c->setPerspective($perspective);
    $c->addTitle("Perspective = " . $perspective);

    # Set the center of the plot region at (195, 165), and set width x depth x height to 200 x 200 x
    # 150 pixels
    $c->setPlotRegion(195, 165, 200, 200, 150);

    # Set the plot region wall thichness to 5 pixels
    $c->setWallThickness(5);

    # Set the elevation and rotation angles to 30 and 30 degrees
    $c->setViewAngle(30, 30);

    # Set the data to use to plot the chart
    $c->setData($dataX, $dataY, $dataZ);

    # Spline interpolate data to a 40 x 40 grid for a smooth surface
    $c->setInterpolation(40, 40);

    # Use smooth gradient coloring.
    $c->colorAxis->setColorGradient();

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

# This example includes 6 charts
$viewers = array();
for ($i = 0; $i < 6; ++$i) {
    $viewers[$i] = new WebChartViewer("chart$i");
    createChart($viewers[$i], $i);
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Surface Perspective</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;">
        Surface Perspective
    </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>