Polar Spline Chart

perldemo\polarspline.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 chart
my $data0 = [5.1, 2.6, 1.5, 2.2, 5.1, 4.3, 4.0, 9.0, 1.7, 8.8, 9.9, 9.5, 9.4, 1.8, 2.1, 2.3, 3.5,
    7.7, 8.8, 6.1, 5.0, 3.1, 6.0, 4.3];
my $angles0 = [0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255,
    270, 285, 300, 315, 330, 345];

my $data1 = [8.1, 2.5, 5, 5.2, 6.5, 8.5, 9, 7.6, 8.7, 6.4, 5.5, 5.4, 3.0, 8.7, 7.1, 8.8, 7.9, 2.2,
    5.0, 4.0, 1.5, 7.5, 8.3, 9.0];
my $angles1 = [0, 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255,
    270, 285, 300, 315, 330, 345];

# Create a PolarChart object of size 460 x 460 pixels
my $c = new PolarChart(460, 460);

# Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
$c->addTitle2($perlchartdir::TopLeft, "<*underline=2*>EM Field Strength", "Arial Bold Italic", 15);

# Set center of plot area at (230, 240) with radius 180 pixels
$c->setPlotArea(230, 240, 180);

# Set the grid style to circular grid
$c->setGridStyle(0);

# Add a legend box at the top right corner of the chart using 9pt Arial Bold font
$c->addLegend(459, 0, 1, "Arial Bold", 9)->setAlignment($perlchartdir::TopRight);

# Set angular axis as 0 - 360, with a spoke every 30 units
$c->angularAxis()->setLinearScale(0, 360, 30);

# Add a red (0xff9999) spline area layer to the chart using (data0, angles0)
$c->addSplineAreaLayer($data0, 0xff9999, "Above 100MHz")->setAngles($angles0);

# Add a blue (0xff) spline line layer to the chart using (data1, angle1)
my $layer1 = $c->addSplineLineLayer($data1, 0x0000ff, "Below 100MHz");
$layer1->setAngles($angles1);

# Set the line width to 3 pixels
$layer1->setLineWidth(3);

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