Draws an arc

Descrizione

bool imagearc ( resource $image , int $cx , int $cy , int $width , int $height , int $start , int $end , int $color )

imagearc() draws an arc of circle centered at the given coordinates.

Elenco dei parametri

image: Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
cx: x-coordinate of the center.
cy: y-coordinate of the center.
width: The arc width.
height: The arc height.
start: The arc start angle, in degrees.
end: The arc end angle, in degrees. 0° is located at the three-o'clock position, and the arc is drawn clockwise.
color: A color identifier created with imagecolorallocate().

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Esempi

Example #1 Drawing a circle with imagearc()


<?php

// create a 200*200 image
$img = imagecreatetruecolor(200, 200);

// allocate some colors
$white = imagecolorallocate($img, 255, 255, 255);
$red   = imagecolorallocate($img, 255,   0,   0);
$green = imagecolorallocate($img,   0, 255,   0);
$blue  = imagecolorallocate($img,   0,   0, 255);

// draw the head
imagearc($img, 100, 100, 200, 200,  0, 360, $white);
// mouth
imagearc($img, 100, 100, 150, 150, 25, 155, $red);
// left and then the right eye
imagearc($img,  60,  75,  50,  50,  0, 360, $green);
imagearc($img, 140,  75,  50,  50,  0, 360, $blue);

// output image in the browser
header("Content-type: image/png");
imagepng($img);

// free memory
imagedestroy($img);

?>

Il precedente esempio visualizzerà qualcosa simile a:

Output of example : Drawing a circle with imagearc()

Vedere anche:

imagefilledarc() - Draw a partial arc and fill it
imageellipse() - Draw an ellipse
imagefilledellipse() - Draw a filled ellipse