3D Stacked Area Chart

This example demonstrates creating a stacked area chart with 3D effects.

The key features demonstrated in this example are:

Add a stacked area layer using XYChart.addAreaLayer2 with the Stack predefined constant.
Add multiple data sets to the area layer using Layer.addDataSet.
Add a legend to the chart using BaseChart.addLegend
Add a title to the y-axis using Axis.setTitle, and draw the title upright (instead of rotated 90 degrees) using TextBox.setFontAngle. Note that the title can contain multiple lines using line break characters.

perldemo\threedstackarea.pl

#!/usr/bin/perl

# The ChartDirector for Perl module is assumed to be in "../lib"
use File::Basename;
use lib (dirname($0)."/../lib") =~ /(.*)/;

use perlchartdir;

# The data for the area chart
my $data0 = [42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63, 67,
    75, 64, 51];
my $data1 = [50, 45, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67, 67, 58, 59, 73, 77, 84, 82,
    80, 84, 89];
my $data2 = [61, 79, 85, 66, 53, 39, 24, 21, 37, 56, 37, 22, 21, 33, 13, 17, 4, 23, 16, 25, 9, 10,
    5, 7, 16];
my $labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15",
    "16", "17", "18", "19", "20", "21", "22", "23", "24"];

# Create a XYChart object of size 500 x 300 pixels
my $c = new XYChart(500, 300);

# Set the plotarea at (90, 30) and of size 300 x 240 pixels.
$c->setPlotArea(90, 30, 300, 240);

# Add a legend box at (405, 100)
$c->addLegend(405, 100);

# Add a title to the chart
$c->addTitle("Daily System Load");

# Add a title to the y axis. Draw the title upright (font angle = 0)
$c->yAxis()->setTitle("Database\nQueries\n(per sec)")->setFontAngle(0);

# Set the labels on the x axis.
$c->xAxis()->setLabels($labels);

# Display 1 out of 2 labels on the x-axis. Show minor ticks for remaining labels.
$c->xAxis()->setLabelStep(2, 1);

# Add an area layer
my $layer = $c->addAreaLayer();

# Draw the area layer in 3D
$layer->set3D();

# Add the three data sets to the area layer
$layer->addDataSet($data0, -1, "Server # 1");
$layer->addDataSet($data1, -1, "Server # 2");
$layer->addDataSet($data2, -1, "Server # 3");

# Output the chart
$c->makeChart("threedstackarea.png");