ImagickDraw::bezier

    (PECL imagick 2, PECL imagick 3)

    ImagickDraw::bezier — 绘制贝塞尔曲线

    描述

    public ImagickDraw::bezier(array $coordinates): bool
    警告

    此函数目前没有文档记录；仅提供其参数列表。

    在图像上的一组点上绘制一条贝塞尔曲线。

    参数

    coordinates

    多维数组，如 array( array( 'x' => 1, 'y' => 2 ), array( 'x' => 3, 'y' => 4 ) )

    返回值

    没有返回值。

    示例

    示例 #1 ImagickDraw::bezier() 示例

    <?php
    function bezier($strokeColor, $fillColor, $backgroundColor) {

    $draw = new \ImagickDraw();

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

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

    $draw->setStrokeWidth(2);

    $smoothPointsSet = [
    [
    [    'x' => 10.0 * 5, 'y' => 10.0 * 5],
    [    'x' => 30.0 * 5, 'y' => 90.0 * 5],
    [    'x' => 25.0 * 5, 'y' => 10.0 * 5],
    [    'x' => 50.0 * 5, 'y' => 50.0 * 5],
    ],
    [
    [    'x' => 50.0 * 5, 'y' => 50.0 * 5],
    [    'x' => 75.0 * 5, 'y' => 90.0 * 5],
    [    'x' => 70.0 * 5, 'y' => 10.0 * 5],
    [    'x' => 90.0 * 5, 'y' => 40.0 * 5],
    ],
    ];

    foreach (    $smoothPointsSet as $points) {
    $draw->bezier($points);
    }

    $disjointPoints = [
    [
    [    'x' => 10 * 5, 'y' => 10 * 5],
    [    'x' => 30 * 5, 'y' => 90 * 5],
    [    'x' => 25 * 5, 'y' => 10 * 5],
    [    'x' => 50 * 5, 'y' => 50 * 5],
    ],
    [
    [    'x' => 50 * 5, 'y' => 50 * 5],
    [    'x' => 80 * 5, 'y' => 50 * 5],
    [    'x' => 70 * 5, 'y' => 10 * 5],
    [    'x' => 90 * 5, 'y' => 40 * 5],
    ]
    ];
    $draw->translate(0, 200);

    foreach (    $disjointPoints as $points) {
    $draw->bezier($points);
    }

    //创建图像对象，以便绘制命令可以渲染到其中
    $imagick = new \Imagick();
    $imagick->newImage(500, 500, $backgroundColor);
    $imagick->setImageFormat("png");

    //将 ImagickDraw 对象中的绘制命令渲染到图像中
    $imagick->drawImage($draw);

    //将图像发送到浏览器
    header("Content-Type: image/png");
    echo     $imagick->getImageBlob();
    }

    ?>

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    用户贡献的备注 2 个备注

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    2
    SkepticaLee
    10 年前
    此函数需要至少 3 个点。当数组中只有两个点时，以下代码将失败

    <?php
    $im     = new Imagick ();
    $points = array (array ('x' => 10, 'y' => 10), array ('x' => 20, 'y' => 10), array ('x' => 30, 'y' => 40), array ('x' => 40, 'y' => 20), array ('x' => 50, 'y' => 60));
    $n = 0;
    while (!empty (    $points))
    {
    $im->newImage (64, 64, "white");
    $draw = new ImagickDraw ();
    $draw->setFillColor ("none");
    $draw->setStrokeWidth (4);
    $draw->setStrokeColor ("black");
    $draw->setStrokeOpacity (0.9);
    $draw->setStrokeAntiAlias (true);
    $draw->bezier ($points);
    $im->drawImage ($draw);
    $im->writeImage ("IMG_$n.png");
    $draw->destroy ();
    $im->destroy ();
    echo     count ($points) . ", $n: <img src=\"IMG_$n.png\"><br>";
    $n++;
    array_shift ($points);
    }
    ?>
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    zombiebovine at gmail dot com
    14 年前
    如何使用

    <?php
    $width     = 200;
    $height = 200;
    $border = 2;

    $img = new Imagick();
    $img->newImage( $width, $height, new ImagickPixel( 'transparent' ) );

    $draw = new ImagickDraw();
    $draw->setStrokeColor( new ImagickPixel( 'black' ) );
    $draw->setStrokeWidth( 2 );
    $draw->setFillColor( new ImagickPixel( 'transparent' ) );

    // 如果输入数据无效，将以模糊的方式失败
    $points = array
    (
    array(     'x' => 0, 'y' => 200 ),
    array(     'x' => 0, 'y' => 0 ),
    array(     'x' => 200, 'y' => 200 ),
    array(     'x' => 200, 'y' => 0 )
    );

    $draw->bezier($points);

    $img->drawImage( $draw );
    $img->setImageFormat( "png" );

    header( "Content-Type: image/png" );
    echo     $img;
    ?>
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