PHP ImagickDraw pathCurveToSmoothRelative()用法及代码示例

ImagickDraw::pathCurveToSmoothRelative()函数是PHP中的一个内置函数，用于使用相对坐标从当前点到(x，y)绘制三次贝塞尔曲线。

用法:

bool ImagickDraw::pathCurveToSmoothRelative( float $x2, float $y2, float $x, float $y )

参数：该函数接受上述和以下所述的四个参数：

$x2:它指定第二个控制点的x坐标。
$y2:它指定第二个控制点的y坐标。
$x:它指定终点的x坐标。
$y:它指定终点的y坐标。

返回值：成功时此函数返回TRUE。

异常：该函数在错误时引发ImagickException。

下面给出的程序说明了PHP中的ImagickDraw::pathCurveToSmoothRelative()函数：

程序1:

<?php 
  
// Create a new imagick object 
$imagick = new Imagick(); 
   
// Create a image on imagick object 
$imagick->newImage(800, 250, 'skyblue'); 
   
// Create a new ImagickDraw object 
$draw = new ImagickDraw(); 
   
// Set the fill color 
$draw->setFillColor('skyblue'); 
  
// Set the stroke color 
$draw->setStrokeColor('black'); 
  
// Set the stroke width 
$draw->setStrokeWidth(5); 
   
// Draw a painting 
$draw->pathStart(); 
$draw->pathMoveToRelative(335, 70); 
$draw->pathCurveToSmoothRelative(50, -50, 60, 20); 
$draw->pathCurveToSmoothRelative(50, -50, 60, 20); 
$draw->pathMoveToRelative(50, 50); 
$draw->pathCurveToSmoothRelative(50, -50, 60, 20); 
$draw->pathCurveToSmoothRelative(50, -50, 60, 20); 
$draw->pathMoveToRelative(-500, 0); 
$draw->pathCurveToSmoothRelative(50, -50, 60, 20); 
$draw->pathCurveToSmoothRelative(50, -50, 60, 20); 
$draw->pathFinish(); 
  
// Set the fill color 
$draw->setFillColor('yellow'); 
  
// Draw a circle 
$draw->circle(20, 20, 100, 20); 
  
// Set the stroke width 
$draw->setStrokeWidth(1); 
  
// Set the fond size 
$draw->setFontSize(40); 
  
// Set the fill color 
$draw->setFillColor('yellow'); 
  
// Annotate the text 
$draw->annotation(500, 40, 'Summer Vibes'); 
  
// Render the draw commands 
$imagick->drawImage($draw); 
   
// Show the output 
$imagick->setImageFormat('png'); 
header("Content-Type:image/png"); 
echo $imagick->getImageBlob(); 
?>

输出：

程序2:

<?php 
// Create a new imagick object 
$imagick = new Imagick(); 
  
// Create a image on imagick object 
$imagick->newImage(800, 250, 'cyan'); 
  
// Create a new ImagickDraw object 
$draw = new ImagickDraw(); 
  
$draw->setFillColor('purple'); 
  
// Set the stroke color 
$draw->setStrokeColor('blue'); 
  
// Set the stroke width 
$draw->setStrokeWidth(15); 
  
// Draw curves to Quadratic Bezier Relative (with pathClose()) 
$draw->pathStart(); 
$draw->pathCurveToSmoothRelative(-200, 250, 1900, 1250); 
$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(); 
?>

输出：

参考： https://www.php.net/manual/en/imagickdraw.pathcurvetosmoothrelative.php

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注：本文由纯净天空筛选整理自gurrrung大神的英文原创作品 PHP | ImagickDraw pathCurveToSmoothRelative() Function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。