imageellipse

(PHP 4 >= 4.0.6, PHP 5)

imageellipseDraw an ellipse

Description

bool imageellipse ( resource $image , int $cx , int $cy , int $width , int $height , int $color )

Draws an ellipse centered at the specified coordinates.

Parameters

image

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

cx

x-coordinate of the center.

cy

y-coordinate of the center.

width

The ellipse width.

height

The ellipse height.

color

The color of the ellipse. A color identifier created with imagecolorallocate().

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 imageellipse() example

<?php

// Create a blank image.
$image imagecreatetruecolor(400300);

// Select the background color.
$bg imagecolorallocate($image000);

// Fill the background with the color selected above.
imagefill($image00$bg);

// Choose a color for the ellipse.
$col_ellipse imagecolorallocate($image255255255);

// Draw the ellipse.
imageellipse($image200150300200$col_ellipse);

// Output the image.
header("Content-type: image/png");
imagepng($image);

?>

The above example will output something similar to:

Output of example : imageellipse()

Notes

Note:

This function requires GD 2.0.2 or later.

See Also

Коментарии

When you wana use "ImageEllipse" function 
in under GD 2.0.2 version, you can use "ImageArc" like bellow

----------------------------------------------------
$file_name = "test.png";

$screen_x = 300;
$screen_y = 200;

$x1 = $screen_x / 2;
$y1 = $screen_y / 2;

$radius = 30;

$image = ImageCreate($screen_x, $screen_y);
$black = ImageColorAllocate($image, 0,0,0);

ImageArc($image, $x1, $y1, $radius , $radius , 0, 360, $black);

ImagePng($image, $file_name); 
ImageDestroy($image); 
----------------------------------------------------
2002-12-04 22:56:28
http://php5.kiev.ua/manual/ru/function.imageellipse.html
Автор:
if you want to display an ellipse in the upper left corner of an image, you can easily calculate the corresponding cx and cy values. this example will draw an ellipse having the same width and height as the image.

<?php

$ellipse_width 
100;
$ellipse_height 200;

$ellipse_cx = ($ellipse_width 2);
$ellipse_cy = ($ellipse_height 2);

$img_x $ellipse_width;
$img_y $ellipse_height;

$img imagecreate($img_x$img_y);
$bg imagecolorallocate($img255,255,255);

$ellipse_color imagecolorallocate($img000);

imageellipse($img$ellipse_cx$ellipse_cy$ellipse_width$ellipse_height$ellipse_color);

header("Content-type: image/png");
imagepng($img);
imagedestroy($img);

?>
2005-01-16 08:23:40
http://php5.kiev.ua/manual/ru/function.imageellipse.html
This is an optimised and bug fixed version of nojer at yahoo dot com's rotatedellipse function. I've changed it so that the arguments are compatible with imageellipse. See notes on imagearc for original version.

<?php

function rotatedellipse($im$cx$cy$width$height$rotateangle$colour$filled=false) {
 
// modified here from nojer's version
  // Rotates from the three o-clock position clockwise with increasing angle.
  // Arguments are compatible with imageellipse.

 
$width=$width/2;
 
$height=$height/2;

 
// This affects how coarse the ellipse is drawn.
 
$step=3;

 
$cosangle=cos(deg2rad($rotateangle));
 
$sinangle=sin(deg2rad($rotateangle));

 
// $px and $py are initialised to values corresponding to $angle=0.
 
$px=$width $cosangle;
 
$py=$width $sinangle;
 
  for (
$angle=$step$angle<=(180+$step); $angle+=$step) {
   
   
$ox $width cos(deg2rad($angle));
   
$oy $height sin(deg2rad($angle));
   
   
$x = ($ox $cosangle) - ($oy $sinangle);
   
$y = ($ox $sinangle) + ($oy $cosangle);
 
    if (
$filled) {
     
triangle($im$cx$cy$cx+$px$cy+$py$cx+$x$cy+$y$colour);
     
triangle($im$cx$cy$cx-$px$cy-$py$cx-$x$cy-$y$colour);
    } else {
     
imageline($im$cx+$px$cy+$py$cx+$x$cy+$y$colour);
     
imageline($im$cx-$px$cy-$py$cx-$x$cy-$y$colour);
    }
   
$px=$x;
   
$py=$y;
  }
}

function 
triangle($im$x1,$y1$x2,$y2$x3,$y3$colour) {
   
$coords = array($x1,$y1$x2,$y2$x3,$y3);
   
imagefilledpolygon($im$coords3$colour);
}

?>
2006-06-07 16:36:59
http://php5.kiev.ua/manual/ru/function.imageellipse.html

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