(PECL imagick 2, PECL imagick 3)
ImagickDraw::affine — 調整目前的仿射變換矩陣
affine仿射矩陣參數
不傳回任何值。
範例 #1 ImagickDraw::affine() 範例
<?php
function affine($strokeColor, $fillColor, $backgroundColor) {
$draw = new \ImagickDraw();
$draw->setStrokeWidth(1);
$draw->setStrokeOpacity(1);
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(2);
$PI = 3.141592653589794;
$angle = 60 * $PI / 360;
//縮放繪圖座標。
$affineScale = array("sx" => 1.75, "sy" => 1.75, "rx" => 0, "ry" => 0, "tx" => 0, "ty" => 0);
//剪切繪圖座標。
$affineShear = array("sx" => 1, "sy" => 1, "rx" => sin($angle), "ry" => -sin($angle), "tx" => 0, "ty" => 0);
//旋轉繪圖座標。剪切仿射矩陣
//會產生錯誤縮放的繪圖。
$affineRotate = array("sx" => cos($angle), "sy" => cos($angle), "rx" => sin($angle), "ry" => -sin($angle), "tx" => 0, "ty" => 0,);
//平移（偏移）繪圖。
$affineTranslate = array("sx" => 1, "sy" => 1, "rx" => 0, "ry" => 0, "tx" => 30, "ty" => 30);
//單位仿射矩陣。
$affineIdentity = array("sx" => 1, "sy" => 1, "rx" => 0, "ry" => 0, "tx" => 0, "ty" => 0);
$examples = [$affineScale, $affineShear, $affineRotate, $affineTranslate, $affineIdentity,];
$count = 0;
foreach ($examples as $example) {
$draw->push();
$draw->translate(($count % 2) * 250, intval($count / 2) * 250);
$draw->translate(100, 100);
$draw->affine($example);
$draw->rectangle(-50, -50, 50, 50);
$draw->pop();
$count++;
}
//建立一個影像物件，可以將繪圖指令渲染到其中
$image = new \Imagick();
$image->newImage(500, 750, $backgroundColor);
$image->setImageFormat("png");
//將 ImagickDraw 物件中的繪圖指令渲染到影像中。
$image->drawImage($draw);
//將影像傳送到瀏覽器
header("Content-Type: image/png");
echo $image->getImageBlob();
}
?>