ImagickDraw::pathCurveToQuadraticBezierAbsolute

(PECL imagick 2, PECL imagick 3)

ImagickDraw::pathCurveToQuadraticBezierAbsolute — 繪製二次貝茲曲線

說明

public ImagickDraw::pathCurveToQuadraticBezierAbsolute(
    float $x1,
    float $y1,
    float $x,
    float $y
): bool

警告

此函式目前沒有說明文件；僅提供其參數列表。

使用絕對座標，以 (x1,y1) 作為控制點，從目前點到 (x,y) 繪製一條二次貝茲曲線。在命令結束時，新的目前點將成為多重貝茲曲線中使用的最後一個 (x,y) 座標對。

參數

x1: 控制點的 x 座標
y1: 控制點的 y 座標
x: 終點的 x 座標
y: 終點的 y 座標

返回值

無返回值。

範例

範例 #1 ImagickDraw::pathCurveToQuadraticBezierAbsolute() 範例

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

 $draw = new \ImagickDraw();

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

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

 $draw->pathStart();
 $draw->pathMoveToAbsolute(50,250);

 // This specifies a quadratic bezier curve with the current position as the start
 // point, the control point is the first two params, and the end point is the last two params.
 $draw->pathCurveToQuadraticBezierAbsolute(
 150,50, 
 250,250
 );

 // This specifies a quadratic bezier curve with the current position as the start
 // point, the control point is mirrored from the previous curves control point
 // and the end point is defined by the x, y values.
 $draw->pathCurveToQuadraticBezierSmoothAbsolute(
 450,250
 );

 // This specifies a quadratic bezier curve with the current position as the start
 // point, the control point is mirrored from the previous curves control point
 // and the end point is defined relative from the current position by the x, y values.
 $draw->pathCurveToQuadraticBezierSmoothRelative(
 200,-100
 );

 $draw->pathFinish();

 $imagick = new \Imagick();
 $imagick->newImage(700, 500, $backgroundColor);
 $imagick->setImageFormat("png");

 $imagick->drawImage($draw);

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

}

?>

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