Что такое код imagefilledpolygon

Содержание

php — �� ImageFilledPolygon php?

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Imagefilledpolygon

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imagefilledpolygon

(PHP 3, PHP 4, PHP 5)

imagefilledpolygon — Draw a filled polygon

Description

bool imagefilledpolygon ( resource image, array points, int num_points, int color )

imagefilledpolygon() creates a filled polygon in image image .

points is an array containing the x and y co-ordinates of the polygons vertices consecutively.

The parameter num_points is the total number of vertices, which must be larger than 3.

�� 1. imagefilledpolygon() example

// set up array of points for polygon
$values = array (
40 , 50 , // Point 1 (x, y)
20 , 240 , // Point 2 (x, y)
60 , 60 , // Point 3 (x, y)
240 , 20 , // Point 4 (x, y)
50 , 40 , // Point 5 (x, y)
10 , 10 // Point 6 (x, y)
);

// create image
$i mage = imagecreatetruecolor ( 250 , 250 );

// some colors
$bg = imagecolorallocate ( $i mage , 200 , 200 , 200 );
$blue = imagecolorallocate ( $i mage , 0 , 0 , 255 );

// draw a polygon
imagefilledpolygon ( $i mage , $values , 6 , $blue );

// flush image
header ( ‘Content-type: image/png’ );
imagepng ( $i mage );
imagedestroy ( $i mage );
?>

User Contributed Notes

etnekor at tar dot hu
23-Jan-2006 12:18

There is a simple function to draw a filled point with a chosen radius and color.

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PolyLine � PascalABC:

procedure PolyLine(var points: array[1..n] of Point; n: integer);

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PolyLine � PascalABC.Net:

procedure PolyLine(points: array of Point);

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procedure Polygon(var A: array[1..n] of Point; n: integer);

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Polygon � PascalABC.Net:

procedure Polygon(points: array of Point);

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�� imagefilledpolygon

imagefilledpolygon — Draw a filled polygon

Description int imagefilledpolygon ( resource image, array points, int num_points, int color)

imagefilledpolygon() creates a filled polygon in image image . points is a PHP array containing the polygon’s vertices, ie. points[0] = x0, points[1] = y0, points[2] = x1, points[3] = y1, etc. num_points is the total number of vertices.

Example 1. imagefilledpolygon() example

40, // x1 1 => 50, // y1 2 => 20, // x2 3 => 240, // y2 4 => 60, // x3 5 => 60, // y3 6 => 240, // x4 7 => 20, // y4 8 => 50, // x5 9 => 40, // y5 10 => 10, // x6 11 => 10, // y6 ); // create image $im = imagecreate(250, 250); // some colors $bg = imagecolorallocate($im, 255, 255, 255); $blue = imagecolorallocate($im, 0, 0, 255); // draw a polygon imagefilledpolygon($im, $values, 6, $blue ); // flush image header(‘Content-type: image/png’); imagepng($im); imagedestroy($im); ?>

However, ImageFillPolygon supports only polygons with a maximum of 256 points, so be aware of such complicated polygons.

imagefilledpolygon

Draw a filled polygon ( PHP 4, PHP 5 )

Example 1010. imagefilledpolygon() example

// set up array of points for polygon
$values = array(
40 , 50 , // Point 1 (x, y)
20 , 240 , // Point 2 (x, y)
60 , 60 , // Point 3 (x, y)
240 , 20 , // Point 4 (x, y)
50 , 40 , // Point 5 (x, y)
10 , 10 // Point 6 (x, y)
);

// create image
$image = imagecreatetruecolor ( 250 , 250 );

// some colors
$bg = imagecolorallocate ( $image , 200 , 200 , 200 );
$blue = imagecolorallocate ( $image , 0 , 0 , 255 );

// draw a polygon
imagefilledpolygon ( $image , $values , 6 , $blue );

// flush image
header ( ‘Content-type: image/png’ );
imagepng ( $image );
imagedestroy ( $image );
?>

The above example will output something similar to:

php — �� ImageFilledPolygon php?

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imagefilledpolygon

imagefilledpolygon — Draw a filled polygon

Описание

imagefilledpolygon() creates a filled polygon in the given image .

Список параметров

An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().

An array containing the x and y coordinates of the polygons vertices consecutively

Total number of vertices, which must be bigger than 3

A color identifier created with imagecolorallocate()

Возвращаемые значения

Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.

Примеры

Example#1 imagefilledpolygon() example

// create image
$image = imagecreatetruecolor ( 250 , 250 );

// some colors
$bg = imagecolorallocate ( $image , 200 , 200 , 200 );
$blue = imagecolorallocate ( $image , 0 , 0 , 255 );

// draw a polygon
imagefilledpolygon ( $image , $values , 6 , $blue );

// flush image
header ( ‘Content-type: image/png’ );
imagepng ( $image );
imagedestroy ( $image );
?>

� езультатом выполнения данного примера будет что-то подобное:

Draw a star using imagefilledpolygon (with diagram)

Is there a way with PHP GD to draw a star using imagefilledpolygon ?

Where would the points be plotted?

I believe it involves sine and cosine because.

How can I relate those points to the center using sine and cosine in GD?

3 Answers 3

yes. I suggest you read that manual entry you yourself supplied, as it tells you exactly what you need to do. It even gives an example of a 3-point star, and there’s even an example in the user notes of a 5-sided star.

It’s easy to calculate the points you need:

Before drawing shape, add DG Liabrary in php.in file. Here is the code:

Not the answer you’re looking for? Browse other questions tagged php geometry gd or ask your own question.

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Imagefilledpolygon

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imagefilledpolygon

Description

User Contributed Notes

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Description int imagefilledpolygon ( resource image, array points, int num_points, int color)

imagefilledpolygon

Draw a filled polygon ( PHP 4, PHP 5 )

Example 1010. imagefilledpolygon() example

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imagefilledpolygon

Описание

Список параметров

Возвращаемые значения

Примеры

Draw a star using imagefilledpolygon (with diagram)

3 Answers 3

Not the answer you’re looking for? Browse other questions tagged php geometry gd or ask your own question.

Related

Hot Network Questions

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php — �� ImageFilledPolygon php?

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