Circles and ellipses

Add-On Circles and ellipses

Informations

Author:Olivier
License: FPDF

Description

This script allows to draw circles and ellipses.

Circle(float x, float y, float r [, string style])

x: abscissa of center.
y: ordinate of center.
r: radius.
style: style of rendering, like for Rect (D, F or FD). Default value: D.

Ellipse(float x, float y, float rx, float ry [, string style])

x: abscissa of center.
y: ordinate of center.
rx: horizontal radius.
ry: vertical radius.
style: style of rendering, like for Rect (D, F or FD). Default value: D.

Source

<?php
require('fpdf.php');

class PDF_Ellipse extends FPDF
{
function Circle($x, $y, $r, $style='D')
{
    $this->Ellipse($x, $y, $r, $r, $style);
}

function Ellipse($x, $y, $rx, $ry, $style='D')
{
    if($style=='F')
        $op='f';
    elseif($style=='FD' || $style=='DF')
        $op='B';
    else
        $op='S';
    $lx=4/3*(M_SQRT2-1)*$rx;
    $ly=4/3*(M_SQRT2-1)*$ry;
    $k=$this->k;
    $h=$this->h;
    $this->_out(sprintf('%.2F %.2F m %.2F %.2F %.2F %.2F %.2F %.2F c', 
        ($x+$rx)*$k, ($h-$y)*$k, 
        ($x+$rx)*$k, ($h-($y-$ly))*$k, 
        ($x+$lx)*$k, ($h-($y-$ry))*$k, 
        $x*$k, ($h-($y-$ry))*$k));
    $this->_out(sprintf('%.2F %.2F %.2F %.2F %.2F %.2F c', 
        ($x-$lx)*$k, ($h-($y-$ry))*$k, 
        ($x-$rx)*$k, ($h-($y-$ly))*$k, 
        ($x-$rx)*$k, ($h-$y)*$k));
    $this->_out(sprintf('%.2F %.2F %.2F %.2F %.2F %.2F c', 
        ($x-$rx)*$k, ($h-($y+$ly))*$k, 
        ($x-$lx)*$k, ($h-($y+$ry))*$k, 
        $x*$k, ($h-($y+$ry))*$k));
    $this->_out(sprintf('%.2F %.2F %.2F %.2F %.2F %.2F c %s', 
        ($x+$lx)*$k, ($h-($y+$ry))*$k, 
        ($x+$rx)*$k, ($h-($y+$ly))*$k, 
        ($x+$rx)*$k, ($h-$y)*$k, 
        $op));
}
}
?>

Example

This example prints a yellow disc inside an ellipse:

<?php
require('ellipse.php');

$pdf=new PDF_Ellipse();
$pdf->AddPage();
$pdf->Ellipse(100, 50, 30, 20);
$pdf->SetFillColor(255, 255, 0);
$pdf->Circle(110, 47, 7, 'F');
$pdf->Output();
?>

View the result here.

Download

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