📜  PHP | imagickdraw pathCurveToQuadraticBezierSmoothAbsolute()函数

📅  最后修改于: 2022-05-13 01:56:54.043000             🧑  作者: Mango

PHP | imagickdraw pathCurveToQuadraticBezierSmoothAbsolute()函数

ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute()函数是PHP中的一个内置函数,用于绘制作为参数曲线的二次贝塞尔曲线。此函数可以平滑地从二次曲线延续曲线。

句法:

bool ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute( float $x, float $y )

参数:该函数接受上面提到的两个参数,如下所述:

  • $x:指定结束的 x 坐标
  • $y:它指定结束 y 坐标

返回值:此函数在成功时返回 TRUE。

异常:此函数在出错时抛出 ImagickException。

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

方案一:

newImage(800, 250, 'black');
  
// Create a new ImagickDraw object
$draw = new ImagickDraw();
  
$draw->setFillColor('black');
  
// Set the stroke color
$draw->setStrokeColor('red');
  
// Draw curves to Quadratic Bezier Smooth Absolute (without pathClose())
$draw->pathStart();
$draw->pathCurveToQuadraticBezierSmoothAbsolute(3950, 250);
$draw->pathCurveToQuadraticBezierSmoothAbsolute(2950, 250);
$draw->pathCurveToQuadraticBezierSmoothAbsolute(390, 250);
$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:

方案二:

newImage(800, 250, 'black');
  
// Create a new ImagickDraw object
$draw = new ImagickDraw();
  
$draw->setFillColor('black');
  
// Set the stroke color
$draw->setStrokeColor('yellow');
  
// Draw curves to Quadratic Bezier Smooth Absolute (with pathClose())
$draw->pathStart();
$draw->pathCurveToQuadraticBezierSmoothAbsolute(3950, 250);
$draw->pathCurveToQuadraticBezierSmoothAbsolute(950, 250);
$draw->pathCurveToQuadraticBezierSmoothAbsolute(2390, 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();
?>

输出:

参考: https://www. PHP.net/manual/en/imagickdraw.pathcurvetoquadraticbeziersmoothabsolute。 PHP