<?php
require_once("../lib/phpchartdir.php");

# The (x, y) coordinates of the starting point of the vectors
$dataX = array(20, 40, 60, 80, 100, 20, 40, 60, 80, 100, 20, 40, 58, 62, 80, 100, 20,
    40, 60, 80, 100, 20, 40, 60, 80, 100);
$dataY = array(20, 20, 20, 20, 20, 40, 40, 40, 40, 40, 60, 60, 60, 60, 60, 60, 80,
    80, 80, 80, 80, 100, 100, 100, 100, 100);

# The lengths (radii) and directions (angles) of the vectors
$dataR = array(6, 6, 9, 6, 6, 6, 9, 12, 9, 6, 9, 12, 12, 12, 12, 9, 6, 9, 12, 9, 6,
    6, 6, 9, 6, 6);
$dataA = array(-45, -30, 0, 30, 45, -60, -45, 0, 45, 60, -90, -90, -90, 90, 90, 90,
    -120, -135, 180, 135, 120, -135, -150, 180, 150, 135);

# Create a XYChart object of size 450 x 390 pixels
$c = new XYChart(450, 390);

# Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
# (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
# (0xc0c0c0)
$c->setPlotArea(55, 40, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1);

# Add a title to the chart using 18 pts Times Bold Itatic font.
$c->addTitle("Vector Chart Demonstration", "timesbi.ttf", 18);

# Add a title to the y axis using 12 pts Arial Bold Italic font
$c->yAxis->setTitle("Y Axis Title", "arialbi.ttf", 12);

# Add a title to the x axis using 12 pts Arial Bold Italic font
$c->xAxis->setTitle("X Axis Title", "arialbi.ttf", 12);

# Set the axes line width to 3 pixels
$c->xAxis->setWidth(3);
$c->yAxis->setWidth(3);

# Add a vector layer to the chart using blue (0000CC) color, with vector arrow size
# set to 11 pixels
$vectorLayerObj = $c->addVectorLayer($dataX, $dataY, $dataR, $dataA, YAxisScale,
    0x0000cc);
$vectorLayerObj->setArrowHead(11);

# output the chart
header("Content-type: image/png");
print($c->makeChart2(PNG));
?>