ImagickDraw::line

(PECL imagick 2, PECL imagick 3)

ImagickDraw::line — Draws a line

说明

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

警告

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

示例 #1 ImagickDraw::line() example


<?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();
}

?>

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User Contributed Notes 1 note

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GaryM at BinaryFarm dot com ¶

12 years ago


<?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";
} 
?>

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