ImagickDraw::bezier

(PECL imagick 2, PECL imagick 3)

ImagickDraw::bezier — 繪製貝茲曲線

說明

public ImagickDraw::bezier(陣列 $coordinates): 布林值

警告

此函式目前沒有說明文件；僅提供其參數列表。

通過影像上的一組點繪製貝茲曲線。

參數

coordinates: 多維陣列，例如 array( array( 'x' => 1, 'y' => 2 ), array( 'x' => 3, 'y' => 4 ) )

傳回值

不傳回任何值。

範例

範例 #1 ImagickDraw::bezier() 範例

<?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);
 }

 //Create an image object which the draw commands can be rendered into
 $imagick = new \Imagick();
 $imagick->newImage(500, 500, $backgroundColor);
 $imagick->setImageFormat("png");

 //Render the draw commands in the ImagickDraw object 
 //into the image.
 $imagick->drawImage($draw);

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

?>

發現問題了嗎？

學習如何改進此頁面 • 提交拉取請求 • 回報錯誤

＋新增筆記

使用者貢獻的筆記 2 則筆記

往上

往下

SkepticaLee ¶

10 年前

此函式需要至少 3 個點。當陣列中只剩下兩個點時，以下程式碼將會失敗

<?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);
}
?>

往上

往下

zombiebovine at gmail dot com ¶

15 年前

使用方法

<?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' ) );

 // 如果輸入資料無效，將會以不明顯的方式失敗
 $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;
?>

＋新增筆記