ImagickDraw::line

(PECL imagick 2.0.0)

ImagickDraw::line — Draws a line

说明

bool ImagickDraw::line ( float $sx , float $sy , float $ex , float $ey )

Warning

本函数还未编写文档，仅有参数列表。

Draws a line on the image using the current stroke color, stroke opacity, and stroke width.

参数

sx: starting x coordinate
sy: starting y coordinate
ex: ending x coordinate
ey: ending y coordinate

返回值

没有返回值。

范例

Example #1 ImagickDraw::line()


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

    $draw = new \ImagickDraw();

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

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

    $draw->line(125, 70, 100, 50);
    $draw->line(350, 170, 100, 150);

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

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

?>

User Contributed Notes

GaryM at BinaryFarm dot com 24-Feb-2010 08:48


<?php



// a twist on the above radar screen. 

// This makes random colored spokes from a center point



    $width =  400;

    $height = 400;

   

    $image = new Imagick();

    $image->newImage( $width, $height, new ImagickPixel( 'wheat' ) );

    $draw = new ImagickDraw();

   //$draw->setStrokeColor( new ImagickPixel( 'black' ) );



    $rx = $width / 2;

    $ry = $height / 2;

    $total = 2*M_PI;

    $part = $total / 16;

    while( $total > 0  )

    {

        $ex = $rx +$rx * sin( $total );

        $ey = $ry +$ry * cos( $total );

        $draw->line  ( $rx, $ry, $ex, $ey );

        $total -= $part;



    // We need three HEX numbers to create an RGB color code like '#FF33DD'.



    $draw->setStrokeColor( get_random_color() );

    }

    $image->drawImage( $draw );

    $image->setImageFormat( "png" );

    header( "Content-Type: image/png" );

    echo $image;

    exit;



function get_random_color()        // Thanks to Greg R. for this nice little function.

{

    for ($i = 0; $i<6; $i++)

    {

        $c .=  dechex(rand(0,15));

    }

    return "#$c";

} 

?>