ChartDirector 7.0 (PHP Edition)

3D Shadow Mode


      

This example demonstrates an alternative 3D drawing method that uses shadows.

The standard way to draw a pie chart in 3D is to view the chart from an inclined angle. Using this method, the surface of a 3D pie will become an ellipse.

ChartDirector supports an alternative way to draw a pie chart in 3D - to draw the 3D portion like a shadow. The 3D pie will remain perfectly circular, and the sector areas will correctly reflect its percentages.

The 3D drawing method is configured using PieChart.set3D.

Source Code Listing

[File: phpdemo/shadowpie.php]
<?php require_once("../lib/phpchartdir.php"); function createChart($viewer, $chartIndex) { # the tilt angle of the pie $angle = $chartIndex * 90 + 45; # The data for the pie chart $data = array(25, 18, 15, 12, 8, 30, 35); # The labels for the pie chart $labels = array("Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities", "Production"); # Create a PieChart object of size 110 x 110 pixels $c = new PieChart(110, 110); # Set the center of the pie at (50, 55) and the radius to 36 pixels $c->setPieSize(55, 55, 36); # Set the depth, tilt angle and 3D mode of the 3D pie (-1 means auto depth, "true" means the 3D # effect is in shadow mode) $c->set3D(-1, $angle, true); # Add a title showing the shadow angle $c->addTitle("Shadow @ " . $angle . " deg", "Arial", 8); # Set the pie data $c->setData($data, $labels); # Disable the sector labels by setting the color to Transparent $c->setLabelStyle("", 8, Transparent); # Output the chart $viewer->setChart($c, SVG); # Include tool tip for the chart $viewer->setImageMap($c->getHTMLImageMap("", "", "title='{label}: US\${value}K ({percent}%)'")); } # This example includes 4 charts $viewers = array(); for ($i = 0; $i < 4; ++$i) { $viewers[$i] = new WebChartViewer("chart$i"); createChart($viewers[$i], $i); } ?> <!DOCTYPE html> <html> <head> <title>3D Shadow Mode</title> <!-- Include ChartDirector Javascript Library to support chart interactions --> <script type="text/javascript" src="cdjcv.js"></script> </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> 3D Shadow Mode </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a> </div> <!-- ****** Here are the chart images ****** --> <?php for ($i = 0; $i < count($viewers); ++$i) { echo $viewers[$i]->renderHTML(), " "; } ?> </body> </html>