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    ImagickDraw::circle

    (PECL imagick 2, PECL imagick 3)

    ImagickDraw::circle — Dessine un cercle

    Description

    public ImagickDraw::circle(
        float $ox,
        float $oy,
        float $px,
        float $py
    ): bool
    Avertissement

    Cette fonction est actuellement non documentée ; seule la liste des arguments est disponible.

    Dessine un cercle.

    Liste de paramètres

    ox

    abscisse de l'origine

    oy

    ordonnée de l'origine

    px

    abscisse du périmètre

    py

    ordonnée du périmètre

    Valeurs de retour

    Aucune valeur n'est retournée.

    Exemples

    Exemple #1 Exemple avec ImagickDraw::circle()

    <?php
    function circle($strokeColor, $fillColor, $backgroundColor, $originX, $originY, $endX, $endY) {

    //Création d'un objet ImagickDraw.
    $draw = new \ImagickDraw();

    $strokeColor = new \ImagickPixel($strokeColor);
    $fillColor = new \ImagickPixel($fillColor);

    $draw->setStrokeOpacity(1);
    $draw->setStrokeColor($strokeColor);
    $draw->setFillColor($fillColor);

    $draw->setStrokeWidth(2);
    $draw->setFontSize(72);

    $draw->circle($originX, $originY, $endX, $endY);

    $imagick = new \Imagick();
    $imagick->newImage(500, 500, $backgroundColor);
    $imagick->setImageFormat("png");
    $imagick->drawImage($draw);

    header("Content-Type: image/png");
    echo     $imagick->getImageBlob();
    }

    ?>

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    User Contributed Notes 1 note

    up
    10
    SkepticaLee
    10 years ago
    The four values required here are a bit confusing. After all, a circle is defined by three values: the x, y coordinates of the centre, and the radius, r.

    The fourth value is redundant, but has to be given, otherwise the function fails. One way of coping with this redundancy is:

    <?php
    $draw     = new ImagickDraw ();
    //given that $x and $y are the coordinates of the centre, and $r the radius:
    $draw->circle ($x, $y, $x + $r, $y);
    ?>

    There are any number of actions which are synonymous with the last, including:
    <?php
    $draw    ->circle ($x, $y, $x, $y + $r);
    $draw->circle ($x, $y, $x - $r, $y);
    $draw->circle ($x, $y, $x, $y - $r);
    // etc, etc.
    ?>

    Hope this helps.
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