ImagickDraw::pathCurveToQuadraticBezierSmoothRelative()函數是PHP中的一個內置函數,用於繪製從當前點到(x,y)的二次Bezier曲線(使用相對坐標)。
用法:
bool ImagickDraw::pathCurveToQuadraticBezierSmoothRelative( float $x, float $y )
參數:該函數接受上述和以下描述的兩個參數:
- $x:它指定結束的x坐標。
- $y:它指定結束的y坐標。
返回值:成功時此函數返回TRUE。
異常:該函數在錯誤時引發ImagickException。
下麵給出的程序說明了PHP中的ImagickDraw::pathCurveToQuadraticBezierSmoothRelative()函數:
程序1:
<?php
// Create a new imagick object
$imagick = new Imagick();
// Create a image on imagick object
$imagick->newImage(800, 250, 'black');
// Create a new ImagickDraw object
$draw = new ImagickDraw();
$draw->setFillColor('black');
// Set the stroke color
$draw->setStrokeColor('brown');
// Draw curves to Quadratic Bezier Smooth Relative (without pathClose())
$draw->pathStart();
$draw->pathCurveToQuadraticBezierSmoothRelative(950, 250);
$draw->pathFinish();
// Render the draw commands
$imagick->drawImage($draw);
// Show the output
$imagick->setImageFormat('png');
header("Content-Type:image/png");
echo $imagick->getImageBlob();
?>
輸出:
程序2:
<?php
// Create a new imagick object
$imagick = new Imagick();
// Create a image on imagick object
$imagick->newImage(800, 250, 'black');
// Create a new ImagickDraw object
$draw = new ImagickDraw();
$draw->setFillColor('black');
// Set the stroke color
$draw->setStrokeColor('pink');
// Draw curves to Quadratic Bezier Smooth Relative (with pathClose())
$draw->pathStart();
$draw->pathCurveToQuadraticBezierSmoothRelative(3950, 250);
$draw->pathCurveToQuadraticBezierSmoothRelative(950, 250);
$draw->pathCurveToQuadraticBezierSmoothRelative(-2000, 250);
$draw->pathClose();
$draw->pathFinish();
// Render the draw commands
$imagick->drawImage($draw);
// Show the output
$imagick->setImageFormat('png');
header("Content-Type:image/png");
echo $imagick->getImageBlob();
?>
輸出:
參考: https://www.php.net/manual/en/imagickdraw.pathcurvetoquadraticbeziersmoothrelative.php
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注:本文由純淨天空篩選整理自gurrrung大神的英文原創作品 PHP | ImagickDraw pathCurveToQuadraticBezierSmoothRelative() Function。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。