imageopenpolygon

(PHP 7 >= 7.2.0)

imageopenpolygonDraws an open polygon

説明

bool imageopenpolygon ( resource $image , array $points , int $num_points , int $color )

imageopenpolygon() draws an open polygon on the given image. Contrary to imagepolygon(), no line is drawn between the last and the first point.

パラメータ

image

imagecreatetruecolor() のような画像作成関数が返す画像リソース。

points

An array containing the polygon's vertices, e.g.:

points[0] = x0
points[1] = y0
points[2] = x1
points[3] = y1

num_points

Total number of points (vertices).

color

A color identifier created with imagecolorallocate().

返り値

成功した場合に TRUE を、失敗した場合に FALSE を返します。

例1 imageopenpolygon() example

<?php
// Create a blank image
$image imagecreatetruecolor(400300);

// Allocate a color for the polygon
$col_poly imagecolorallocate($image255255255);

// Draw the polygon
imageopenpolygon($image, array(
        
0,   0,
        
100200,
        
300200
    
),
    
3,
    
$col_poly);

// Output the picture to the browser
header('Content-type: image/png');

imagepng($image);
imagedestroy($image);
?>

上の例の出力は、 たとえば以下のようになります。

Output of example : imageopenpolygon()

参考

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