PHP | ImagickDraw pathLineToVerticalRelative() Function

The ImagickDraw::pathLineToVerticalRelative() function is an inbuilt function in PHP which is used draw a vertical line path from the current point to the target point using relative coordinates. The target point then becomes the new current point.

Syntax:

bool ImagickDraw::pathLineToVerticalRelative( float $y )

Parameters:This function accepts a single parameter $y which holds the y-coordinate.

Return Value: This function returns TRUE on success.

Exceptions: This function throws ImagickException on error.

Below given programs illustrate the ImagickDraw::pathLineToVerticalRelative() function in PHP:

Program 1:

<?php

// Create a new imagick object
$imagick = new Imagick();

// Create a image on imagick object
$imagick->newImage(800, 250, 'white');

// Create a new ImagickDraw object
$draw = new ImagickDraw();

// Set the stroke color
$draw->setStrokeColor('blue');

// Set the stroke width
$draw->setStrokeWidth(5);

// Draw line using pathLineToVerticalRelative
$draw->pathStart();
$draw->pathMoveToRelative(400, 0);
$draw->pathLineToVerticalRelative(1000);
$draw->pathFinish();

// Render the draw commands
$imagick->drawImage($draw);

// Show the output
$imagick->setImageFormat('png');
header("Content-Type: image/png");
echo $imagick->getImageBlob();
?>

Output:

Program 2:

<?php

// Create a new imagick object
$imagick = new Imagick();

// Create a image on imagick object
$imagick->newImage(800, 250, 'white');

// Create a new ImagickDraw object
$draw = new ImagickDraw();

$color = ['blue', 'red', 'green',
      'yellow', 'orange', 'brown', 'pink'];

// Set the stroke width
$draw->setStrokeWidth(5);

// Draw lines
for ($x = 0; $x < 20; $x++) {
    $draw->setStrokeColor($color[$x % 7]);
    $draw->pathStart();
    $draw->pathMoveToRelative($x * 40, 0);
    $draw->pathLineToVerticalRelative(800);
    $draw->pathFinish();

}

// Render the draw commands
$imagick->drawImage($draw);

// Show the output
$imagick->setImageFormat('png');
header("Content-Type: image/png");
echo $imagick->getImageBlob();
?>

Output:

Reference: https://www.php.net/manual/en/imagickdraw.pathlinetoverticalrelative.php