Что такое код imagefilledarc

��� ����� ��� imagefilledarc

(PHP 4 >= 4.0.6, PHP 5)

imagefilledarc — Draw a partial ellipse and fill it

Description bool imagefilledarc ( resource image, int cx, int cy, int w, int h, int s, int e, int color, int style )

imagefilledarc() draws a partial ellipse centered at cx , cy (top left is 0, 0) in the image represented by image . ���������� TRUE � ������ ��������� ���������� ��� FALSE � ������ ������������� ������. W and h specifies the ellipse’s width and height respectively while the start and end points are specified in degrees indicated by the s and e arguments. style is a bitwise OR of the following possibilities:


IMG_ARC_PIE and IMG_ARC_CHORD are mutually exclusive; IMG_ARC_CHORD just connects the starting and ending angles with a straight line, while IMG_ARC_PIE produces a rounded edge. IMG_ARC_NOFILL indicates that the arc or chord should be outlined, not filled. IMG_ARC_EDGED , used together with IMG_ARC_NOFILL , indicates that the beginning and ending angles should be connected to the center — this is a good way to outline (rather than fill) a ‘pie slice’.

������ 1. Creating a 3D looking pie

// allocate some solors
$white = imagecolorallocate ( $image , 0xFF , 0xFF , 0xFF );
$gray = imagecolorallocate ( $image , 0xC0 , 0xC0 , 0xC0 );
$darkgray = imagecolorallocate ( $image , 0x90 , 0x90 , 0x90 );
$navy = imagecolorallocate ( $image , 0x00 , 0x00 , 0x80 );
$darknavy = imagecolorallocate ( $image , 0x00 , 0x00 , 0x50 );
$red = imagecolorallocate ( $image , 0xFF , 0x00 , 0x00 );
$darkred = imagecolorallocate ( $image , 0x90 , 0x00 , 0x00 );

// make the 3D effect
for ( $i = 60 ; $i > 50 ; $i —) <
imagefilledarc ( $image , 50 , $i , 100 , 50 , 0 , 45 , $darknavy , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , $i , 100 , 50 , 45 , 75 , $darkgray , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , $i , 100 , 50 , 75 , 360 , $darkred , IMG_ARC_PIE );
>

imagefilledarc ( $image , 50 , 50 , 100 , 50 , 0 , 45 , $navy , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 50 , 100 , 50 , 45 , 75 , $gray , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 50 , 100 , 50 , 75 , 360 , $red , IMG_ARC_PIE );

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

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imagefill ������� ���� imagefilledellipse

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31.03.2020, 17:49

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Image Filters

Apply high-performance filters to, and extract statistical and histogram data from images.

  • Metal Performance Shaders

Overview

The MPSUnary Image Kernel and MPSBinary Image Kernel base classes define several properties common to all image kernels:

A clip rectangle is available to all image kernels that write to a destination texture. It describes the sub-rectangle of the destination texture overwritten by the filter. If the clip rectangle is larger than the destination texture, then the intersection between the clip rectangle and the destination texture bounds is used instead. A clip rectangle may be used to avoid doing work to obscured regions of the destination image, or to manage tiling and limit operations to parts of an image�for example, if a user draws a rectangle on the screen and asks your app to just apply the filter there.

An offset is available to all image kernels that use a source texture from which pixel data is read. It describes the positioning of the source image relative to the result texture. An offset of <0, 0, 0>indicates that the top left pixel of the source texture is the center pixel used to create the top left corner of the destination texture clip rectangle (as a further example, an offset of <1, 2, 0>positions the top left corner of the clip rectangle at position x=1 , y=2 , and z=0 of the source image). The offset is the position of the top left corner of the clip rectangle in the source coordinate frame. It can be used for tiling and for translating an image up, down, left, or right by pixel increments. If there is no clip rectangle, then the offset is the top left corner of the region read by the filter. If there are multiple source textures, then the primary offset describes the top left corner of the region read in the primary source texture and the secondary offset describes the top left corner of the region read in the secondary source texture.

An edge mode describes the behavior of texture reads that stray off the edge of the source image. This can happen if the offset is negative, meaning a read off the top or left edge of the image. This can also happen if the sum of the clip rectangle size and the offset is larger than the source image, meaning a read off the bottom or right edge of the image. Furthermore, it is also possible for image filters to have a kernel window that stretches to examine neighboring pixels beyond the image bounds (such as convolution, morphology, and resampling filters). If there are multiple source textures, then the primary edge mode describes the mode to use with the primary source texture and the secondary edge mode describes the mode to use with the secondary source texture.

In-Place Operation

Some kernels can operate in place. This means that the same texture is used to hold both the input image and the result image. Operating in place is a great way to save memory, time, and energy. You can perform an in-place operation by using the encode To Command Buffer: in Place Texture: fallback Copy Allocator: method.

Unfortunately, it is not always possible for kernels to run in place. Whether a particular kernel can operate in place can vary according to the hardware it is running on, the OS version, and the parameters and properties passed to it. You may not assume that because a kernel works in place today on a particular device that it will do so in the future.

To simplify error handling with failed in-place operation, the encode To Command Buffer: in Place Texture: fallback Copy Allocator: method takes an optional MPSCopy Allocator object. It is used to create a new texture when in-place operation is not possible so as to allow the operation to proceed out of place in a reliable fashion instead. When this happens, the input texture is released and replaced with a new texture. To make use of the feature, you will need to write a copy allocator block.

Listing 1 shows a minimal copy allocator implementation. For more information, see the MPSCopy Allocator reference.

Minimal MPSCopyAllocator Implementation

Supported Pixel Formats for Image Kernels

All Metal Performance Shaders image kernels support source and destination textures with the following ordinary and packed pixel formats:

Ordinary formats with one 8-bit normalized unsigned integer component.

Ordinary formats with two 8-bit normalized unsigned integer components.

Ordinary formats with four 8-bit normalized unsigned integer components.

Ordinary format with 16-bit floating-point components.

Ordinary format with 32-bit floating-point components.

Ordinary format with 16-bit normalized unsigned integer components.

Packed 16-bit format with normalized unsigned integer color components.

Packed 32-bit format with normalized unsigned integer color components.

Packed 32-bit format with floating-point color components.

Some compressed pixel formats can be used as source textures. They cannot be used as destination textures because they cannot be written to. Metal Performance Shaders image kernels support the following compression families:

The following Metal Performance Shaders image kernels also support source and destination textures with ordinary signed and unsigned integer pixel formats:

The ordinary signed and unsigned integer pixel formats supported by these image kernels:

Ordinary format with 8-bit signed integer components.

Ordinary format with 8-bit unsigned integer components.

Ordinary format with 16-bit signed integer components.

Ordinary format with 16-bit unsigned integer components.

Ordinary format with 32-bit signed integer components.

Ordinary format four 32-bit unsigned integer components.

For more information on pixel formats, see MTLPixel Format and Pixel Format Capabilities.

ImageFilledArc ������� �� ����� ��� PHP 5.x

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���-����� �� ��������� ���������� �� ���������� �����-���� ����������� ������� � ��������� �������� PHP, � ����� � ������ ��������� � ���� ��������. ���, ������� ������ �������, �������� ����. ���, ������� ��� ��������, — ���, �� ��� ����� ��������������, ������ �������� ��� �����-���� ����������.

��� ����� ��� imagefilledarc

(PHP 4 >= 4.0.6, PHP 5)

imagefilledarc — Draw a partial ellipse and fill it

Description bool imagefilledarc ( resource image, int cx, int cy, int w, int h, int s, int e, int color, int style )

imagefilledarc() draws a partial ellipse centered at cx , cy (top left is 0, 0) in the image represented by image . Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки. W and h specifies the ellipse’s w >s and e arguments. style is a bitwise OR of the following possibilities:


IMG_ARC_PIE and IMG_ARC_CHORD are mutually exclusive; IMG_ARC_CHORD just connects the starting and ending angles with a straight line, while IMG_ARC_PIE produces a rounded edge. IMG_ARC_NOFILL indicates that the arc or chord should be outlined, not filled. IMG_ARC_EDGED , used together with IMG_ARC_NOFILL , indicates that the beginning and ending angles should be connected to the center — this is a good way to outline (rather than fill) a ‘pie slice’.

Пример 1. Creating a 3D looking pie

// this example is provided by poxy at klam dot is

// create image
$image = imagecreate ( 100 , 100 );

// allocate some solors
$white = imagecolorallocate ( $image , 0xFF , 0xFF , 0xFF );
$gray = imagecolorallocate ( $image , 0xC0 , 0xC0 , 0xC0 );
$darkgray = imagecolorallocate ( $image , 0x90 , 0x90 , 0x90 );
$navy = imagecolorallocate ( $image , 0x00 , 0x00 , 0x80 );
$darknavy = imagecolorallocate ( $image , 0x00 , 0x00 , 0x50 );
$red = imagecolorallocate ( $image , 0xFF , 0x00 , 0x00 );
$darkred = imagecolorallocate ( $image , 0x90 , 0x00 , 0x00 );

// make the 3D effect
for ( $i = 60 ; $i > 50 ; $i —) <
imagefilledarc ( $image , 50 , $i , 100 , 50 , 0 , 45 , $darknavy , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , $i , 100 , 50 , 45 , 75 , $darkgray , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , $i , 100 , 50 , 75 , 360 , $darkred , IMG_ARC_PIE );
>

imagefilledarc ( $image , 50 , 50 , 100 , 50 , 0 , 45 , $navy , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 50 , 100 , 50 , 45 , 75 , $gray , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 50 , 100 , 50 , 75 , 360 , $red , IMG_ARC_PIE );

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

Замечание: Эта функция нуждается в GD версии 2.0.1 или выше.

= 300 ;
$height = 200 ;

$dane [] = 1 ;
$dane [] = 2 ;
$dane [] = 3 ;
$dane [] = 4 ;
$dane [] = 5 ;
$dane [] = 6 ;
$dane [] = 7 ;
$dane [] = 8 ;
$dane [] = 9 ;
$dane [] = 10 ;
$dane [] = 11 ;

$image = imageCreate ( $width , $height );
$background = imageColorAllocate ( $image , 205 , 205 , 205 );

$kolor [ 0 ] = imageColorAllocate ( $image , 255 , 203 , 3 );
$kolor [ 1 ] = imageColorAllocate ( $image , 220 , 101 , 29 );
$kolor [ 2 ] = imageColorAllocate ( $image , 189 , 24 , 51 );
$kolor [ 3 ] = imageColorAllocate ( $image , 214 , 0 , 127 );
$kolor [ 4 ] = imageColorAllocate ( $image , 98 , 1 , 96 );
$kolor [ 5 ] = imageColorAllocate ( $image , 0 , 62 , 136 );
$kolor [ 6 ] = imageColorAllocate ( $image , 0 , 102 , 179 );
$kolor [ 7 ] = imageColorAllocate ( $image , 0 , 145 , 195 );
$kolor [ 8 ] = imageColorAllocate ( $image , 0 , 115 , 106 );
$kolor [ 9 ] = imageColorAllocate ( $image , 178 , 210 , 52 );
$kolor [ 10 ] = imageColorAllocate ( $image , 137 , 91 , 74 );
$kolor [ 11 ] = imageColorAllocate ( $image , 82 , 56 , 47 );

$cien [ 0 ] = imagecolorallocate ( $image , 205 , 153 , 0 );
$cien [ 1 ] = imagecolorallocate ( $image , 170 , 51 , 0 );
$cien [ 2 ] = imagecolorallocate ( $image , 139 , 0 , 1 );
$cien [ 3 ] = imagecolorallocate ( $image , 164 , 0 , 77 );
$cien [ 4 ] = imagecolorallocate ( $image , 48 , 0 , 46 );
$cien [ 5 ] = imagecolorallocate ( $image , 0 , 12 , 86 );
$cien [ 6 ] = imagecolorallocate ( $image , 0 , 52 , 129 );
$cien [ 7 ] = imagecolorallocate ( $image , 0 , 95 , 145 );
$cien [ 8 ] = imagecolorallocate ( $image , 0 , 65 , 56 );
$cien [ 9 ] = imagecolorallocate ( $image , 128 , 160 , 2 );
$cien [ 10 ] = imagecolorallocate ( $image , 87 , 41 , 24 );
$cien [ 11 ] = imagecolorallocate ( $image , 32 , 6 , 0 );

$suma = array_sum ( $dane );

$stopnie = 0 ;
for( $i = 0 ; $i count ( $dane ); $i ++) <
$start [ $i ]= $stopnie ;
$stop [ $i ] = $stopnie + round (( $dane [ $i ] / $suma ) * 360 , 0 );
$stopnie = $stop [ $i ];
>

$x = $width / 2 ;
$size = $width / 10 ;
$y = $height / 2 — $size / 2 — 1 ;

// Wyswietlanie
for( $g = $size ; $g > 0 ; $g —) <
for( $n = 0 ; $n count ( $dane ); $n ++) <
imagefilledarc ( $image , $x , $y + $g , $width , $height — $size , $start [ $n ], $stop [ $n ], $cien [ $n ], IMG_ARC_PIE );
>
>

for( $i = 0 ; $i count ( $dane ); $i ++) <
imagefilledarc ( $image , $x , $y , $width , $height — $size , $start [ $i ], $stop [ $i ], $kolor [ $i ], IMG_ARC_PIE );

Илон Маск рекомендует:  Что дальше

header ( «Content-type: image/png» );
imagePNG ( $image );
imageDestroy ( $image );
?>

Note that imageFilledArc() and imageArc() both take ints as degree measurements. This is no problem if you’re *only* using imageArc() and/or imageFilledArc(). However, if you’re using calculated degrees and plan to superimpose other drawing elements (eg., you want to make vertical lines between the shadow 3D effect) you need to floor() your degrees before converting them to radians, otherwise you’ll get precision errors.

A small example illustrating the ‘feature’.

= imageCreate ( 400 , 400 );
$back = imageColorAllocate ( $img , 0 , 0 , 0 );
$front = imageColorAllocate ( $img , 255 , 255 , 255 );

$sd = 45.5 ;
$ed = 130.5 ;

imageFilledArc ( $img , 200 , 200 , 300 , 300 , $sd , $ed ,
$front , IMG_ARC_PIE | IMG_ARC_NOFILL | IMG_ARC_EDGED );
imageArc ( $img , 200 , 230 , 300 , 300 , $sd , $ed , $front );

imageLine ( $img ,
cos ( deg2rad ( $sd ))* 150 + 200 , sin ( deg2rad ( $sd ))* 150 + 200 ,
cos ( deg2rad ( $sd ))* 150 + 200 , sin ( deg2rad ( $sd ))* 150 + 230 ,
$front );
imageLine ( $img ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 200 ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 230 ,
$front );

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

And this is how it should be.

= imageCreate ( 400 , 400 );
$back = imageColorAllocate ( $img , 0 , 0 , 0 );
$front = imageColorAllocate ( $img , 255 , 255 , 255 );

$sd = floor ( 45.5 );
$ed = floor ( 130.5 );

imageFilledArc ( $img , 200 , 200 , 300 , 300 , $sd , $ed ,
$front , IMG_ARC_PIE | IMG_ARC_NOFILL | IMG_ARC_EDGED );
imageArc ( $img , 200 , 230 , 300 , 300 , $sd , $ed , $front );

imageLine ( $img ,
cos ( deg2rad ( $sd ))* 150 + 200 , sin ( deg2rad ( $sd ))* 150 + 200 ,
cos ( deg2rad ( $sd ))* 150 + 200 , sin ( deg2rad ( $sd ))* 150 + 230 ,
$front );
imageLine ( $img ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 200 ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 230 ,
$front );

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

He a�adido un par de cosillas al ejemplo de «hans at lintoo dot dk», sobre todo el grosor (thickness) del efecto 3D.

//Making a image 200 x 200
$im = imagecreate ( 200 , 200 );

//Setting background color
$background = imagecolorallocate ( $im , 226 , 226 , 226 );

//Setting colors of elements
$randcolor [ 0 ] = imagecolorallocate ( $im , 255 , 203 , 3 );
$randcolor [ 1 ] = imagecolorallocate ( $im , 220 , 101 , 29 );
$randcolor [ 2 ] = imagecolorallocate ( $im , 189 , 24 , 51 );
$randcolor [ 3 ] = imagecolorallocate ( $im , 214 , 0 , 127 );
$randcolor [ 4 ] = imagecolorallocate ( $im , 98 , 1 , 96 );
$randcolor [ 5 ] = imagecolorallocate ( $im , 0 , 62 , 136 );
$randcolor [ 6 ] = imagecolorallocate ( $im , 0 , 102 , 179 );
$randcolor [ 7 ] = imagecolorallocate ( $im , 0 , 145 , 195 );
$randcolor [ 8 ] = imagecolorallocate ( $im , 0 , 115 , 106 );
$randcolor [ 9 ] = imagecolorallocate ( $im , 178 , 210 , 52 );
$randcolor [ 10 ] = imagecolorallocate ( $im , 137 , 91 , 74 );
$randcolor [ 11 ] = imagecolorallocate ( $im , 82 , 56 , 47 );

//Setting the darker alt color to the main color
$darkcolor [ 0 ] = imagecolorallocate ( $im , 205 , 153 , 0 );
$darkcolor [ 1 ] = imagecolorallocate ( $im , 170 , 51 , 0 );
$drakcolor [ 2 ] = imagecolorallocate ( $im , 139 , 0 , 1 );
$darkcolor [ 3 ] = imagecolorallocate ( $im , 164 , 0 , 77 );
$darkcolor [ 4 ] = imagecolorallocate ( $im , 48 , 0 , 46 );
$darkcolor [ 5 ] = imagecolorallocate ( $im , 0 , 12 , 86 );
$darkcolor [ 6 ] = imagecolorallocate ( $im , 0 , 52 , 129 );
$darkcolor [ 7 ] = imagecolorallocate ( $im , 0 , 95 , 145 );
$darkcolor [ 8 ] = imagecolorallocate ( $im , 0 , 65 , 56 );
$darkcolor [ 9 ] = imagecolorallocate ( $im , 128 , 160 , 2 );
$darkcolor [ 10 ] = imagecolorallocate ( $im , 87 , 41 , 24 );
$darkcolor [ 11 ] = imagecolorallocate ( $im , 32 , 6 , 0 );

//Getting the data from GET
/*
$i = 0;
while ($i $data = array( 100 , 200 , 50 , 40 ); /* datos a mostrar ( menos de 12 valores ) */
$num_data = count ( $data );

//Getting ready
$datasum = array_sum ( $data );
$anglesum [ 0 ] = 0 ;
$angle [ 0 ] = 0 ;
$i = 0 ;

//Se calcula el comienzo y final de la posici�n de los �ngulos de los elementos
while ( $i $num_data ) <
++ $i ;
$n = $i — 1 ;
$part [ $i ] = $data [ $n ] / $datasum ;
$angle [ $i ] = floor ( $part [ $i ] * 360 );
$anglesum [ $i ] = array_sum ( $angle );
>

/*
//DEBUGGING — only for testing purposes
echo «

// Variables posicion
$cx = 120 ;
$cy = 100 ;
$ancho = 100 ;
$largo = 2 * $ancho ; // relaci�n de aspecto
$grosor = 25 ; // efecto 3D

// make the 3D effect
for ( $g = $grosor ; $g > 0 ; $g —) <
$n = 0 ;
while ( $n $num_data ) <
++ $n ;
$f = $n — 1 ;
if ( $angle [ $n ] != 0 )
imagefilledarc ( $im , $cx , $cy + $g , $largo , $ancho , $anglesum [ $f ], $anglesum [ $n ], $darkcolor [ $f ], IMG_ARC_PIE );
>
>
//make the 2d data that sits above the 3deffect
$i = 0 ;
while ( $i $num_data ) <
++ $i ;
$n = $i — 1 ;
if ( $angle [ $i ] != 0 ) <
imagefilledarc ( $im , $cx , $cy , $largo , $ancho , $anglesum [ $n ], $anglesum [ $i ], $randcolor [ $n ], IMG_ARC_PIE );
>
>

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

Even more efficiency:

The original code snippet and the following suggestions are inefficient in that they rely on the overlying php to fill vertically using loops rather than taking advantage of the underlying drawing routines. Also, this is done by repeatedly drawing filled partial elipses and circular calculations are typically expensive (PHP may use tables, I’m not sure) The original code could be rewritten as

// Add the bottom layer.
imagefilledarc ( $image , 50 , 60 , 100 , 50 , 0 , 45 , $darknavy , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 60 , 100 , 50 , 45 , 75 , $darkgray , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 60 , 100 , 50 , 75 , 360 , $darkred , IMG_ARC_PIE );

//Now do the joining pieces.
//Note: Precompute cosines and sines for efficiency
$c1 = 50 * cos ( 45 / 180 * M_PI );
$s1 = 25 * sin ( 45 / 180 * M_PI );
$c2 = 50 * cos ( 75 / 180 * M_PI );
$s2 = 25 * sin ( 75 / 180 * M_PI );

$area1 =array( 100 , 60 , 100 , 50 , 50 + $c1 , 50 + $s1 , 50 + $c1 , 60 + $s1 );
$area2 =array( 50 + $c1 , 50 + $s1 , 50 + $c1 , 60 + $s1 , 50 + $c2 , 60 + $s2 , 50 + $c2 , 50 + $s2 );
//Note that piece 3 goes round the corner. So we are only interested in the leftmost extent. You would need to do this programatically. Also, you do not need to make vertical parts for any segments completely at the back of the pie (in fact, not filledarcs either)
$area3 =array( 50 + $c2 , 50 + $s2 , 50 + $c2 , 60 + $s2 , 0 , 60 , 0 , 50 );

imagefilledpolygon ( $image , $area1 , 4 , $darknavy );
imagefilledpolygon ( $image , $area2 , 4 , $darkgray );
imagefilledpolygon ( $image , $area3 , 4 , $darkred );

imagefilledarc ( $image , 50 , 50 , 100 , 50 , 0 , 45 , $navy , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 50 , 100 , 50 , 45 , 75 , $gray , IMG_ARC_PIE );
imagefilledarc ( $image , 50 , 50 , 100 , 50 , 75 , 360 , $red , IMG_ARC_PIE );
?>

Note that the polygons are perhaps slightly inefficient. If there was an imagefilledtriangle, this code would be simpler. Given how fundamental triangles are, perhaps for a future version?

for nice colors and adapted shadows from amount of values i try:

function _errechne_gradzahlen ( $werte ) < /* calc degrees */
foreach( $werte as $wert ) < $sum += $wert ; >
foreach( $werte as $wert ) < $gradzahlen [] = 360 * ( $wert / $sum ); >
return $gradzahlen ;
>

function _randomcol ( $im ) <
return imagecolorallocate ( $im , rand ( 100 , 224 ), rand ( 100 , 224 ), rand ( 128 , 224 ) );
>

$values = array( 100 , 200 , 50 , 100 , 43 , 32 ); /* the data to display ( real values ) */
$werte = _errechne_gradzahlen ( $values ); /* degrees-array */
$width = 200 ;
$height = 200 ;
$half_width = floor ( $width / 2 );
$half_height = floor ( $height / 2 );

$im = ImageCreateTrueColor ( $width , $height );

foreach( $werte as $key => $wert ) <
/* get colors and shadows */
$color = _randomcol ( $im );
$shadow = $color — 20000 ; // or brighter shadows take 10000
$colors [] = $color ;
$shadows [] = $shadow ;
/* 3D effekt */
for ( $i = ( $half_height + 10 ); $i > $half_height ; $i —) <
imagefilledarc (
$im ,
$half_width , $i ,
$width , $half_height ,
$offset , ( $offset + $wert ), // from, to (degrees)
$shadows [ $key ], IMG_ARC_NOFILL );
>
$offset = $offset + $wert ;
>
$offset = 0 ;

foreach( $werte as $key => $wert ) < /* an now draw the top */
imagefilledarc (
$im ,
$half_width , $half_width ,
$width , $half_height , // half sized
$offset , ( $offset + $wert ),
$colors [ $key ], IMG_ARC_PIE );
$offset = $offset + $wert ;
>
header ( «Content-type: image/png» );
imagepng ( $im );
imagedestroy ( $im );
?>

sry for my crab english and the disordered code, i cut and ‘translate’ it from a class i wrote before.

The examples given so far for drawing a 3D looking pie chart are extremely inefficient and can give a huge performance hit to scripts that draw a lot of pies and in particular those that do offline processing on disk, rather than send a single pie chart to the browser (either way this modification saves you a lot of CPU cycles).

Modify the portion of the code that creates the 3D effect to only draw the outline (with IMG_ARC_NOFILL) of the pie layers below the top filled pie:

// make the 3D effect (modified for the original example)
for ($i = 60; $i >= 50; $i—) <
imagefilledarc($image, 50, $i, 100, 50, 0, 45, $darknavy, IMG_ARC_NOFILL);
imagefilledarc($image, 50, $i, 100, 50, 45, 75 , $darkgray, IMG_ARC_NOFILL);
imagefilledarc($image, 50, $i, 100, 50, 75, 360 , $darkred, IMG_ARC_NOFILL);
>

Note the >= on the for loop, which fills in a gap that is created without the =

I modificed the code to make a 3d pie from data collected elsewhere. in this case it was for a statistics page.

when testing you can use:

//Making a image 200 x 200
$im = imagecreate ( 200 , 200 );

//Setting background color
$background = imagecolorallocate ( $im , 226 , 226 , 226 );

//Setting colors of elements
$randcolor [ 0 ] = imagecolorallocate ( $im , 255 , 203 , 3 );
$randcolor [ 1 ] = imagecolorallocate ( $im , 220 , 101 , 29 );
$randcolor [ 2 ] = imagecolorallocate ( $im , 189 , 24 , 51 );
$randcolor [ 3 ] = imagecolorallocate ( $im , 214 , 0 , 127 );
$randcolor [ 4 ] = imagecolorallocate ( $im , 98 , 1 , 96 );
$randcolor [ 5 ] = imagecolorallocate ( $im , 0 , 62 , 136 );
$randcolor [ 6 ] = imagecolorallocate ( $im , 0 , 102 , 179 );
$randcolor [ 7 ] = imagecolorallocate ( $im , 0 , 145 , 195 );
$randcolor [ 8 ] = imagecolorallocate ( $im , 0 , 115 , 106 );
$randcolor [ 9 ] = imagecolorallocate ( $im , 178 , 210 , 52 );
$randcolor [ 10 ] = imagecolorallocate ( $im , 137 , 91 , 74 );
$randcolor [ 11 ] = imagecolorallocate ( $im , 82 , 56 , 47 );

//Setting the darker alt color to the main color
$darkcolor [ 0 ] = imagecolorallocate ( $im , 205 , 153 , 0 );
$darkcolor [ 1 ] = imagecolorallocate ( $im , 170 , 51 , 0 );
$drakcolor [ 2 ] = imagecolorallocate ( $im , 139 , 0 , 1 );
$darkcolor [ 3 ] = imagecolorallocate ( $im , 164 , 0 , 77 );
$darkcolor [ 4 ] = imagecolorallocate ( $im , 48 , 0 , 46 );
$darkcolor [ 5 ] = imagecolorallocate ( $im , 0 , 12 , 86 );
$darkcolor [ 6 ] = imagecolorallocate ( $im , 0 , 52 , 129 );
$darkcolor [ 7 ] = imagecolorallocate ( $im , 0 , 95 , 145 );
$darkcolor [ 8 ] = imagecolorallocate ( $im , 0 , 65 , 56 );
$darkcolor [ 9 ] = imagecolorallocate ( $im , 128 , 160 , 2 );
$darkcolor [ 10 ] = imagecolorallocate ( $im , 87 , 41 , 24 );
$darkcolor [ 11 ] = imagecolorallocate ( $im , 32 , 6 , 0 );

//Getting the data from GET
$i = 0 ;
while ( $i 11 ) <
$data [ $i ] = $_GET [++ $i ];
>

//Getting ready
$datasum = array_sum ( $data );
$anglesum [ 0 ] = 0 ;
$angle [ 0 ] = 0 ;
$i = 0 ;

//Calc the start and end angle position of the elements
while ( $i 11 ) <
++ $i ;
$n = $i — 1 ;
$part [ $i ] = $data [ $n ] / $datasum ;
$angle [ $i ] = floor ( $part [ $i ] * 360 );
$anglesum [ $i ] = array_sum ( $angle );
>

/*
//DEBUGGING — only for testing purposes
echo «

// make the 3D effect
$n = 0 ; $i = 0 ;
while ( $n 11 ) <
++ $n ;
$f = $n — 1 ;
if ( $angle [ $n ] != 0 ) <
for ( $i = 110 ; $i > 100 ; $i —) <
imagefilledarc ( $im , 100 , $i , 200 , 100 , $anglesum [ $f ], $anglesum [ $n ], $darkcolor [ $f ], IMG_ARC_PIE );
>
>
>

//make the 2d data that sits above the 3deffect
$i = 0 ;
while ( $i 11 ) <
++ $i ;
$n = $i — 1 ;
if ( $angle [ $i ] != 0 ) <
imagefilledarc ( $im , 100 , 100 , 200 , 100 , $anglesum [ $n ], $anglesum [ $i ], $randcolor [ $n ], IMG_ARC_PIE );
>
>

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

if you want to place a text onto the edge of a circle you need to
get a point on the circle:

if you want the point to be in the middle of a pie piece
you need a starting and ending angle

/*
From a set of numbers from a query return and an
array of colors this will generate a pie chart
*/

$a=array();
while($d=mysql_fetch_array($start_angle_query))
<
$a[]=$d[0];
>

/* make two arrays one for start of angle 2nd
for end of angle
*/
$sum=array_sum($a);
$degree_adjuster=360/$sum;
//constant for circle
array_unshift($a,0 );
// add 0 for start angle
$start_angle=array();
// new array to hold values for start vector
$end_angle=array();
//new array to hold values for end vector
array_pop($a);
//trim one array for start so numbers don’t end on 360
while($a) //iterate till array is empty
<
array_push($start_angle,(end($start_angle)+ $a[0]));

/*enter numbers in array $start_angle adding the last number in
array and adding the first number from modified original array*/

array_shift($a);//delete first value of array
>
while($b)
<
array_push($end_angle,(end($end_angle)+$b[0]));
array_shift($b);
>
for($i=0;$i

PHP | imagefilledarc() Function

The imagefilledarc() function is an inbuilt function in PHP which is used to draws a partial arc centered at the specified coordinate in the given image. This function return True on success or False on failure

Syntax:

Parameters: This function accepts nine parameters as mentioned above and described below:

  • $image: It is returned by one of the image creation functions, such as imagecreatetruecolor(). It is used to create size of image..
  • $cx: This parameter is used to set the x-coordinate of the center.
  • $cy: This parameter is used to set the y-coordinate of the center.
  • $width: This parameter is used to set the arc width.
  • $height: This parameter is used to set the arc height.
  • $start: The arc start angle, in degrees.
  • $end: The arc end angle, in degrees. 0� is located at the three-o�clock position, and the arc is drawn clockwise.
  • $color: A color identifier created with imagecolorallocate().
  • $style: Suggest how to fill the image and its values can be any one among the value listed below.
    • IMG_ARC_PIE
    • IMG_ARC_CHORD
    • IMG_ARC_NOFILL
    • IMG_ARC_EDGED

Return Values: This function returns True on success or False on failure.

Below programs illustrate the imagefilledarc() function in PHP:

����� �����

� ����� ����������� ��� ���������� ������ � �������� ������� ��������� ������� �� ����������� ���������� ���� ��� �������� �������, ����������� � ��������� ������ ���������� � ���������� ������������� ��������� � ����� ����������� ����� �������� � ��������� �������.

�� ������� ����� ����������� �������.

��� ����� ��������� �������� ���������� ���������� � �������������� ���������� ����������� ���������������� ������������ ������ �������� Microsoft (Windows 9�, Windows XP, Windows 2000 � Windows Server 2003). �������� �������� ��������� ������� ��������� �������, ������� ���������� �������� ��������, ���������� � ��������, �������������� ����� ����������, ������� ���������������� � �������������. ��������������� �������� �������� ����������, ���������� � ����� Win32, � ����� Win64. �������� ����������� ��� ������� ������� ������������ Windows � �� ������������� ����������. �������� �������� ��������, ��������� ����� � �� Web-����� �����, ����������� �������� �������� ���������.

Илон Маск рекомендует:  Площадь круга

����� ������������� �� ������������� � �������������, ��� ������� ������������, ��� � ����������, � ����� ����� ������� ��� ��������� ��������������� ��������������.

imagefilledarc

imagefilledarc — ������ ����� ������� � ��������� �.

��������

int imagefilledarc (resource image, int cx, int cy, int w, int h, int s, int e, int col, int style)

imagefilledarc() ������ ����� ������� � ������� cx , cy (������� ����� ���� ����� ���������� 0, 0) �� ����������� image . W � h ������������� ������ � ������ �������, � ��������� � �������� ����� ��������������� � �������� ����������� s � e .
style ��� ������� ��� �� ���������� �������������:



IMG_ARC_PIE � IMG_ARC_CHORD ����������������; IMG_ARC_CHORD ������ ��������� ��������� � �������� ���� ������ ������, � IMG_ARC_PIE ��� �������� ����. IMG_ARC_NOFILL ���������, ��� ������ ���� ��������� ���� ��� ����� ��� ����������. IMG_ARC_EDGED , �������������� ������ � IMG_ARC_NOFILL , ���������, ��� ��������� � �������� ���� ������ ���� ��������� � ������� — ��� ������� ������ ��������� (�� �� ���������) ‘pie slice/������ �����’.

����������: ��� ������� ���� ������� � PHP 4.0.6 � ������� GD 2.0.1.

Imagefilledarc

Php �������


Php �������


imagefilledarc

(PHP 4 >= 4.0.6, PHP 5)

imagefilledarc — Draw a partial ellipse and fill it

Description

bool imagefilledarc ( resource image, int cx, int cy, int w, int h, int s, int e, int color, int style )

imagefilledarc() draws a partial ellipse centered at cx , cy (top left is 0, 0) in the image represented by image . ���������� TRUE � ������ ��������� ���������� ��� FALSE � ������ ������������� ������. W and h specifies the ellipse’s w >while the start and end points are specified in degrees indicated by the s and e arguments. style is a bitwise OR of the following possibilities:


IMG_ARC_PIE and IMG_ARC_CHORD are mutually exclusive; IMG_ARC_CHORD just connects the starting and ending angles with a straight line, whileIMG_ARC_PIE produces a rounded edge. IMG_ARC_NOFILL indicates that the arc or chord should be outlined, not filled. IMG_ARC_EDGED, used together with IMG_ARC_NOFILL, indicates that the beginning and ending angles should be connected to the center — this is a good way to outline (rather than fill) a ‘pie slice’.

������ 1. Creating a 3D looking pie

// create image
$i m age = imagecreatetruecolor ( 100 , 100 );

// allocate some solors
$white = imagecolorallocate ( $i m age , 0xFF , 0xFF , 0xFF );
$g ray = imagecolorallocate ( $i m age , 0xC0 , 0xC0 , 0xC0 );
$d arkgray = imagecolorallocate ( $i m age , 0x90 , 0x90 , 0x90 );
$n avy = imagecolorallocate ( $i m age , 0x00 , 0x00 , 0x80 );
$d arknavy = imagecolorallocate ( $i m age , 0x00 , 0x00 , 0x50 );
$r ed = imagecolorallocate ( $i m age , 0xFF , 0x00 , 0x00 );
$d arkred = imagecolorallocate ( $i m age , 0x90 , 0x00 , 0x00 );

// make the 3D effect
for ( $i = 60 ; $i > 50 ; $i —) <
imagefilledarc ( $i m age , 50 , $i , 100 , 50 , 0 , 45 , $d arknavy , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , $i , 100 , 50 , 45 , 75 , $d arkgray , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , $i , 100 , 50 , 75 , 360 , $d arkred , IMG_ARC_PIE );
>

imagefilledarc ( $i m age , 50 , 50 , 100 , 50 , 0 , 45 , $n avy , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , 50 , 100 , 50 , 45 , 75 , $g ray , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , 50 , 100 , 50 , 75 , 360 , $r ed , IMG_ARC_PIE );

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

������� ���
����������

���������: ��� ������� ��������� � GD ������ 2.0.1 ��� ����.

User Contributed Notes

imazir at gmail dot com
31-Jan-2006 01:53

The previous example does not work. Try those modifications and you will have the expected results :

$R andomized = rand ( 1 , 20 );
for ( $i = 0 ; $i $R andomized ; $i ++) < $d ata [ $i ] = rand ( 2 , 20 ); > ; //full array with garbage.
$i m g x = ‘200’ ; $i m g y = ‘200’ ; //Set Image Size. ImageX,ImageY
$cx = ‘100’ ; $cy = ’50’ ; //Set Pie Postition. CenterX,CenterY
$s x = ‘200’ ; $s y = ‘100’ ; $s z = ’20’ ; // Set Size-dimensions. SizeX,SizeY,SizeZ

$d ata _sum = array_sum ( $d ata );
//convert to angles.
for ( $i = 0 ; $i $R andomized ; $i ++) <
$a ngle [ $i ] = (( $d ata [ $i ] / $d ata _sum ) * 360 );
$a ngle _sum [ $i ] = array_sum ( $a ngle );
> ;
$i m = imagecreate ( $i m g x , $i m g y );
$b ack ground = imagecolorallocate ( $i m , 255 , 255 , 255 );
//Random colors.
for ( $i = 0 ; $i $R andomized ; $i ++) <
$r = rand ( 100 , 255 ); $g = rand ( 100 , 255 ); $b = rand ( 100 , 255 );
$color s [ $i ] = imagecolorallocate ( $i m , $r , $g , $b );
$color d [ $i ] = imagecolorallocate ( $i m ,( $r / 2 ),( $g / 2 ),( $b / 2 ));
>
//3D effect.
for ( $z = 1 ; $z $s z ; $z ++) <
for ( $i = 1 ; $i $R andomized ; $i ++) <
imagefilledarc ( $i m , $cx ,( $cy + $s z )- $z , $s x , $s y , $a ngle _sum [ $i — 1 ]
, $a ngle _sum [ $i ] , $color d [ $i ] , IMG_ARC_PIE );
> ;
> ;
//Top pie.
for ( $i = 1 ; $i $R andomized ; $i ++) <
imagefilledarc ( $i m , $cx , $cy , $s x , $s y , $a ngle _sum [ $i — 1 ] , $a ngle _sum [ $i ] , $color s [ $i ] , IMG_ARC_PIE );
> ;
//Output.
header ( ‘Content-type: image/png’ );
imagepng ( $i m );
imagedestroy ( $i m );
?>

Byron at theworks dot net dot nz
11-Oct-2005 10:52

try this,

$R andomized = rand ( 1 , 20 );
for ( $i = 0 ; $i $R andomized ; $i ++) < $d ata [ $i ] = rand ( 2 , 20 ); > ; //full array with garbage.
$i m g x = ‘200’ ; $i m g y = ‘200’ ; //Set Image Size. ImageX,ImageY
$cx = ‘100’ ; $cy = ’50’ ; //Set Pie Postition. CenterX,CenterY
$s x = ‘200’ ; $s y = ‘100’ ; $s z = ’20’ ; // Set Size-dimensions. SizeX,SizeY,SizeZ

$d ata _sum = array_sum ( $d ata );
//convert to angles.
for ( $i = 0 ; $i $R andomized ; $i ++) <
$a ngle [ $i ] = (( $d ata [ $i ] / $d ata _sum ) * 360 );
$a ngle _sum [ $i ] = array_sum ( $a ngle );
> ;
$i m = imagecreate ( $i m g x , $i m g y );
$b ack ground = imagecolorallocate ( $i m , 255 , 255 , 255 );
//Random colors.
for ( $i = 0 ; $i $R andomized ; $i ++) <
$r = rand ( 100 , 255 ); $g = rand ( 100 , 255 ); $b = rand ( 100 , 255 );
$color s [ $i ] = imagecolorallocate ( $i m , $r , $g , $b );
$color d [ $i ] = imagecolorallocate ( $i m ,( $r / 2 ),( $g / 2 ),( $b / 2 ));
>
//3D effect.
for ( $i = 0 ; $z $s z ; $z ++) <
for ( $i = 0 ; $i $R andomized ; $i ++) <
imagefilledarc ( $i m , $cx ,( $cy + $s z )- $z , $s x , $s y , $a ngle _sum [ $i — 1 ]
, $a ngle _sum [ $i ] , $color d [ $i ] , IMG_ARC_PIE );
> ;
> ;
//Top pie.
for ( $i = 0 ; $i $R andomized ; $i ++) <
imagefilledarc ( $i m , $cx , $cy , $s x , $s y , $a ngle _sum [ $i — 1 ] , $a ngle _sum [ $i ] , $color s [ $i ] , IMG_ARC_PIE );
> ;
//Output.
header ( ‘Content-type: image/png’ );
imagepng ( $i m );
imagedestroy ( $i m );
?>

paulcharltonthomson at hotmail dot com
02-Jul-2005 10:00

Here’s a slightly better way to get the colours for the pie chart shaded wall as posted by double-zonk at wp dot pl

$r gb0 = array ( 255 , 153 , 204 );
$r gb1 = array ( 255 , 153 , 0 );
$r gb2 = array ( 153 , 204 , 0 );
$r gb3 = array ( 51 , 153 , 102 );
$r gb4 = array ( 51 , 204 , 204 );
$r gb5 = array ( 51 , 102 , 255 );
$r gb6 = array ( 128 , 0 , 128 );
$r gb7 = array ( 150 , 150 , 150 );

for ( $r = 0 ; $r $r )
<
if ($ < "rgb" . $r >[ 0 ] $s hadow r = 0 ; else $s hadow r = $ < "rgb" . $r >[ 0 ] — 50 ;
if ($ < "rgb" . $r >[ 1 ] $s hadow g = 0 ; else $s hadow g = $ < "rgb" . $r >[ 1 ] — 50 ;
if ($ < "rgb" . $r >[ 2 ] $s hadow b = 0 ; else $s hadow b = $ < "rgb" . $r >[ 2 ] — 50 ;
$ < "wall" . $r >= array ( $s hadow r , $s hadow g , $s hadow b );
>

for ( $s = 0 ; $s $s )
<
$kolor [ $s ] = imagecolorallocate ( $i m age , $ < "rgb" . $s >[ 0 ] , $ < "rgb" . $s >[ 1 ] , $ < "rgb" . $s >[ 2 ] );
$cien [ $s ] = imagecolorallocate ( $i m age , $ < "wall" . $s >[ 0 ] , $ < "wall" . $s >[ 1 ] , $ < "wall" . $s >[ 2 ] );
>

?>

04-Jun-2005 11:25

For 3D-graphs you will want to have a nice shadow. Here is an easy wat to calculate a good matching shadow to a color.
$color is the color for the pie-piece above, $s hadow _color is the shadow under it.

$mask = 0 ; //0 for darker, 255 for brighter
$percent = 0.70 ; //between 0.40 (very different) and 0.99 (almost the same)

$R = rand ( 0 , 124 ); // > between 0,124 if your background color is white
$G = rand ( 0 , 124 ); // > between 124,255 if your background color is black
$B = rand ( 0 , 124 ); // > or play with these values

$R S = round ( $R * $percent ) + round ( $mask * ( 1 — $percent ));
$G S = round ( $G * $percent ) + round ( $mask * ( 1 — $percent ));
$B S = round ( $B * $percent ) + round ( $mask * ( 1 — $percent ));

$color = imagecolorallocate ( $i m , $R , $G , $B );
$s hadow _color = imagecolorallocate ( $i m , $R S , $G S , $B S );

?>

double-zonk at wp dot pl
08-Apr-2005 11:25

$width = 300 ;
$height = 200 ;

$d ane [ ] = 1 ;
$d ane [ ] = 2 ;
$d ane [ ] = 3 ;
$d ane [ ] = 4 ;
$d ane [ ] = 5 ;
$d ane [ ] = 6 ;
$d ane [ ] = 7 ;
$d ane [ ] = 8 ;
$d ane [ ] = 9 ;
$d ane [ ] = 10 ;
$d ane [ ] = 11 ;

$i m age = imageCreate ( $width , $height );
$b ack ground = imageColorAllocate ( $i m age , 205 , 205 , 205 );

$kolor [ 0 ] = imageColorAllocate ( $i m age , 255 , 203 , 3 );
$kolor [ 1 ] = imageColorAllocate ( $i m age , 220 , 101 , 29 );
$kolor [ 2 ] = imageColorAllocate ( $i m age , 189 , 24 , 51 );
$kolor [ 3 ] = imageColorAllocate ( $i m age , 214 , 0 , 127 );
$kolor [ 4 ] = imageColorAllocate ( $i m age , 98 , 1 , 96 );
$kolor [ 5 ] = imageColorAllocate ( $i m age , 0 , 62 , 136 );
$kolor [ 6 ] = imageColorAllocate ( $i m age , 0 , 102 , 179 );
$kolor [ 7 ] = imageColorAllocate ( $i m age , 0 , 145 , 195 );
$kolor [ 8 ] = imageColorAllocate ( $i m age , 0 , 115 , 106 );
$kolor [ 9 ] = imageColorAllocate ( $i m age , 178 , 210 , 52 );
$kolor [ 10 ] = imageColorAllocate ( $i m age , 137 , 91 , 74 );
$kolor [ 11 ] = imageColorAllocate ( $i m age , 82 , 56 , 47 );

$cien [ 0 ] = imagecolorallocate ( $i m age , 205 , 153 , 0 );
$cien [ 1 ] = imagecolorallocate ( $i m age , 170 , 51 , 0 );
$cien [ 2 ] = imagecolorallocate ( $i m age , 139 , 0 , 1 );
$cien [ 3 ] = imagecolorallocate ( $i m age , 164 , 0 , 77 );
$cien [ 4 ] = imagecolorallocate ( $i m age , 48 , 0 , 46 );
$cien [ 5 ] = imagecolorallocate ( $i m age , 0 , 12 , 86 );
$cien [ 6 ] = imagecolorallocate ( $i m age , 0 , 52 , 129 );
$cien [ 7 ] = imagecolorallocate ( $i m age , 0 , 95 , 145 );
$cien [ 8 ] = imagecolorallocate ( $i m age , 0 , 65 , 56 );
$cien [ 9 ] = imagecolorallocate ( $i m age , 128 , 160 , 2 );
$cien [ 10 ] = imagecolorallocate ( $i m age , 87 , 41 , 24 );
$cien [ 11 ] = imagecolorallocate ( $i m age , 32 , 6 , 0 );

$s um a = array_sum ( $d ane );

$s top nie = 0 ;
for ( $i = 0 ; $i count ( $d ane ); $i ++) <
$s tart [ $i ] = $s top nie ;
$s top [ $i ] = $s top nie + round (( $d ane [ $i ] / $s um a ) * 360 , 0 );
$s top nie = $s top [ $i ] ;
>

$x = $width / 2 ;
$s ize = $width / 10 ;
$y = $height / 2 — $s ize / 2 — 1 ;

// Wyswietlanie
for ( $g = $s ize ; $g > 0 ; $g —) <
for ( $n = 0 ; $n count ( $d ane ); $n ++) <
imagefilledarc ( $i m age , $x , $y + $g , $width , $height — $s ize , $s tart [ $n ] , $s top [ $n ] , $cien [ $n ] , IMG_ARC_PIE );
>
>

for ( $i = 0 ; $i count ( $d ane ); $i ++) <
imagefilledarc ( $i m age , $x , $y , $width , $height — $s ize , $s tart [ $i ] , $s top [ $i ] , $kolor [ $i ] , IMG_ARC_PIE );

header ( «Content-type: image/png» );
imagePNG ( $i m age );
imageDestroy ( $i m age );
?>

t_therkelsen at hotmail dot com
08-Mar-2005 12:21

Note that imageFilledArc() and imageArc() both take ints as degree measurements. This is no problem if you’re *only* using imageArc() and/or imageFilledArc(). However, if you’re using calculated degrees and plan to superimpose other drawing elements (eg., you want to make vertical lines between the shadow 3D effect) you need to floor () your degrees before converting them to radians, otherwise you’ll get precision errors.

A small example illustrating the ‘feature’.

$i m g = imageCreate ( 400 , 400 );
$b ack = imageColorAllocate ( $i m g , 0 , 0 , 0 );
$f ront = imageColorAllocate ( $i m g , 255 , 255 , 255 );

$s d = 45.5 ;
$ed = 130.5 ;

imageFilledArc ( $i m g , 200 , 200 , 300 , 300 , $s d , $ed ,
$f ront , IMG_ARC_PIE | IMG_ARC_NOFILL | IMG_ARC_EDGED );
imageArc ( $i m g , 200 , 230 , 300 , 300 , $s d , $ed , $f ront );

imageLine ( $i m g ,
cos ( deg2rad ( $s d ))* 150 + 200 , sin ( deg2rad ( $s d ))* 150 + 200 ,
cos ( deg2rad ( $s d ))* 150 + 200 , sin ( deg2rad ( $s d ))* 150 + 230 ,
$f ront );
imageLine ( $i m g ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 200 ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 230 ,
$f ront );

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

And this is how it should be.

$i m g = imageCreate ( 400 , 400 );
$b ack = imageColorAllocate ( $i m g , 0 , 0 , 0 );
$f ront = imageColorAllocate ( $i m g , 255 , 255 , 255 );

$s d = floor ( 45.5 );
$ed = floor ( 130.5 );

imageFilledArc ( $i m g , 200 , 200 , 300 , 300 , $s d , $ed ,
$f ront , IMG_ARC_PIE | IMG_ARC_NOFILL | IMG_ARC_EDGED );
imageArc ( $i m g , 200 , 230 , 300 , 300 , $s d , $ed , $f ront );

imageLine ( $i m g ,
cos ( deg2rad ( $s d ))* 150 + 200 , sin ( deg2rad ( $s d ))* 150 + 200 ,
cos ( deg2rad ( $s d ))* 150 + 200 , sin ( deg2rad ( $s d ))* 150 + 230 ,
$f ront );
imageLine ( $i m g ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 200 ,
cos ( deg2rad ( $ed ))* 150 + 200 , sin ( deg2rad ( $ed ))* 150 + 230 ,
$f ront );

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

braulio at example dot com
03-Mar-2005 07:54

He a�adido un par de cosillas al ejemplo de «hans at lintoo dot dk», sobre todo el grosor (thickness) del efecto 3D.

//Making a image 200 x 200
$i m = imagecreate ( 200 , 200 );

//Setting background color
$b ack ground = imagecolorallocate ( $i m , 226 , 226 , 226 );

//Setting colors of elements
$r andcolor [ 0 ] = imagecolorallocate ( $i m , 255 , 203 , 3 );
$r andcolor [ 1 ] = imagecolorallocate ( $i m , 220 , 101 , 29 );
$r andcolor [ 2 ] = imagecolorallocate ( $i m , 189 , 24 , 51 );
$r andcolor [ 3 ] = imagecolorallocate ( $i m , 214 , 0 , 127 );
$r andcolor [ 4 ] = imagecolorallocate ( $i m , 98 , 1 , 96 );
$r andcolor [ 5 ] = imagecolorallocate ( $i m , 0 , 62 , 136 );
$r andcolor [ 6 ] = imagecolorallocate ( $i m , 0 , 102 , 179 );
$r andcolor [ 7 ] = imagecolorallocate ( $i m , 0 , 145 , 195 );
$r andcolor [ 8 ] = imagecolorallocate ( $i m , 0 , 115 , 106 );
$r andcolor [ 9 ] = imagecolorallocate ( $i m , 178 , 210 , 52 );
$r andcolor [ 10 ] = imagecolorallocate ( $i m , 137 , 91 , 74 );
$r andcolor [ 11 ] = imagecolorallocate ( $i m , 82 , 56 , 47 );

//Setting the darker alt color to the main color
$d arkcolor [ 0 ] = imagecolorallocate ( $i m , 205 , 153 , 0 );
$d arkcolor [ 1 ] = imagecolorallocate ( $i m , 170 , 51 , 0 );
$d rakcolor [ 2 ] = imagecolorallocate ( $i m , 139 , 0 , 1 );
$d arkcolor [ 3 ] = imagecolorallocate ( $i m , 164 , 0 , 77 );
$d arkcolor [ 4 ] = imagecolorallocate ( $i m , 48 , 0 , 46 );
$d arkcolor [ 5 ] = imagecolorallocate ( $i m , 0 , 12 , 86 );
$d arkcolor [ 6 ] = imagecolorallocate ( $i m , 0 , 52 , 129 );
$d arkcolor [ 7 ] = imagecolorallocate ( $i m , 0 , 95 , 145 );
$d arkcolor [ 8 ] = imagecolorallocate ( $i m , 0 , 65 , 56 );
$d arkcolor [ 9 ] = imagecolorallocate ( $i m , 128 , 160 , 2 );
$d arkcolor [ 10 ] = imagecolorallocate ( $i m , 87 , 41 , 24 );
$d arkcolor [ 11 ] = imagecolorallocate ( $i m , 32 , 6 , 0 );

//Getting the data from GET
/*
$i = 0;
while ( $i <
$d ata [ $i ] = $_GET [ ++ $i ] ;
>
*/
$d ata = array ( 100 , 200 , 50 , 40 ); /* datos a mostrar ( menos de 12 valores ) */
$n um_data = count ( $d ata );

//Getting ready
$d ata sum = array_sum ( $d ata );
$a ngle sum [ 0 ] = 0 ;
$a ngle [ 0 ] = 0 ;
$i = 0 ;

//Se calcula el comienzo y final de la posici�n de los �ngulos de los elementos
while ( $i $n um_data ) <
++ $i ;
$n = $i — 1 ;
$part [ $i ] = $d ata [ $n ] / $d ata sum ;
$a ngle [ $i ] = floor ( $part [ $i ] * 360 );
$a ngle sum [ $i ] = array_sum ( $a ngle );
>

/*
//DEBUGGING — only for testing purposes
echo «

«;
print_r ( $part );
print_r ( $a ngle sum );
print_r ( $a ngle );
*/

// Variables posicion
$cx = 120 ;
$cy = 100 ;
$a ncho = 100 ;
$largo = 2 * $a ncho ; // relaci�n de aspecto
$g rosor = 25 ; // efecto 3D

// make the 3D effect
for ( $g = $g rosor ; $g > 0 ; $g —) <
$n = 0 ;
while ( $n $n um_data ) <
++ $n ;
$f = $n — 1 ;
if ( $a ngle [ $n ] != 0 )
imagefilledarc ( $i m , $cx , $cy + $g , $largo , $a ncho , $a ngle sum [ $f ] , $a ngle sum [ $n ] , $d arkcolor [ $f ] , IMG_ARC_PIE );
>
>
//make the 2d data that sits above the 3deffect
$i = 0 ;
while ( $i $n um_data ) <
++ $i ;
$n = $i — 1 ;
if ( $a ngle [ $i ] != 0 ) <
imagefilledarc ( $i m , $cx , $cy , $largo , $a ncho , $a ngle sum [ $n ] , $a ngle sum [ $i ] , $r andcolor [ $n ] , IMG_ARC_PIE );
>
>

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

rich at dicksonlife dot com
24-Sep-2004 06:22

Even more efficiency:

The original code snippet and the following suggestions are inefficient in that they rely on the overlying php to fill vertically using loops rather than taking advantage of the underlying drawing routines. Also, this is done by repeatedly drawing filled partial elipses and circular calculations are typically expensive (PHP may use tables, I’m not sure) The original code could be rewritten as

// Add the bottom layer.
imagefilledarc ( $i m age , 50 , 60 , 100 , 50 , 0 , 45 , $d arknavy , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , 60 , 100 , 50 , 45 , 75 , $d arkgray , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , 60 , 100 , 50 , 75 , 360 , $d arkred , IMG_ARC_PIE );

//Now do the joining pieces.
//Note: Precompute cosines and sines for efficiency
$c1 = 50 * cos ( 45 / 180 * M_PI );
$s 1 = 25 * sin ( 45 / 180 * M_PI );
$c2 = 50 * cos ( 75 / 180 * M_PI );
$s 2 = 25 * sin ( 75 / 180 * M_PI );

$a rea1 = array ( 100 , 60 , 100 , 50 , 50 + $c1 , 50 + $s 1 , 50 + $c1 , 60 + $s 1 );
$a rea2 = array ( 50 + $c1 , 50 + $s 1 , 50 + $c1 , 60 + $s 1 , 50 + $c2 , 60 + $s 2 , 50 + $c2 , 50 + $s 2 );
//Note that piece 3 goes round the corner. So we are only interested in the leftmost extent. You would need to do this programatically. Also, you do not need to make vertical parts for any segments completely at the back of the pie (in fact, not filledarcs either)
$a rea3 = array ( 50 + $c2 , 50 + $s 2 , 50 + $c2 , 60 + $s 2 , 0 , 60 , 0 , 50 );

imagefilledpolygon ( $i m age , $a rea1 , 4 , $d arknavy );
imagefilledpolygon ( $i m age , $a rea2 , 4 , $d arkgray );
imagefilledpolygon ( $i m age , $a rea3 , 4 , $d arkred );

imagefilledarc ( $i m age , 50 , 50 , 100 , 50 , 0 , 45 , $n avy , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , 50 , 100 , 50 , 45 , 75 , $g ray , IMG_ARC_PIE );
imagefilledarc ( $i m age , 50 , 50 , 100 , 50 , 75 , 360 , $r ed , IMG_ARC_PIE );
?>

Note that the polygons are perhaps slightly inefficient. If there was an imagefilledtriangle, this code would be simpler. Given how fundamental triangles are, perhaps for a future version?

Rich
micha _a.t_ psytrance _d.o.t_ info
09-Sep-2004 06:09

for nice colors and adapted shadows from amount of values i try:

function _errechne_gradzahlen ( $wert e ) < /* calc degrees */
foreach ( $wert e as $wert ) < $s um += $wert ; >
foreach ( $wert e as $wert ) < $g radzahlen [ ] = 360 * ( $wert / $s um ); >
return $g radzahlen ;
>

function _randomcol ( $i m ) <
return imagecolorallocate ( $i m , rand ( 100 , 224 ), rand ( 100 , 224 ), rand ( 128 , 224 ) );
>

$values = array ( 100 , 200 , 50 , 100 , 43 , 32 ); /* the data to display ( real values ) */
$wert e = _errechne_gradzahlen ( $values ); /* degrees-array */
$width = 200 ;
$height = 200 ;
$half_width = floor ( $width / 2 );
$half_height = floor ( $height / 2 );

$i m = ImageCreateTrueColor ( $width , $height );

foreach ( $wert e as $key => $wert ) <
/* get colors and shadows */
$color = _randomcol ( $i m );
$s hadow = $color — 20000 ; // or brighter shadows take 10000
$color s [ ] = $color ;
$s hadow s [ ] = $s hadow ;
/* 3D effekt */
for ( $i = ( $half_height + 10 ); $i > $half_height ; $i —) <
imagefilledarc (
$i m ,
$half_width , $i ,
$width , $half_height ,
$offset , ( $offset + $wert ), // from, to (degrees)
$s hadow s [ $key ] , IMG_ARC_NOFILL );
>
$offset = $offset + $wert ;
>
$offset = 0 ;

foreach ( $wert e as $key => $wert ) < /* an now draw the top */
imagefilledarc (
$i m ,
$half_width , $half_width ,
$width , $half_height , // half sized
$offset , ( $offset + $wert ),
$color s [ $key ] , IMG_ARC_PIE );
$offset = $offset + $wert ;
>
header ( «Content-type: image/png» );
imagepng ( $i m );
imagedestroy ( $i m );
?>

sry for my crab english and the disordered code, i cut and ‘translate’ it from a class i wrote before.
poopie
06-Aug-2004 08:08

The examples given so far for drawing a 3D looking pie chart are extremely inefficient and can give a huge performance hit to scripts that draw a lot of pies and in particular those that do offline processing on disk, rather than send a single pie chart to the browser (either way this modification saves you a lot of CPU cycles).

Modify the portion of the code that creates the 3D effect to only draw the outline (with IMG_ARC_NOFILL) of the pie layers below the top filled pie:

// make the 3D effect (modified for the original example)
for ( $i = 60; $i >= 50; $i —) <
imagefilledarc( $i m age , 50, $i , 100, 50, 0, 45, $d arknavy , IMG_ARC_NOFILL);
imagefilledarc( $i m age , 50, $i , 100, 50, 45, 75 , $d arkgray , IMG_ARC_NOFILL);
imagefilledarc( $i m age , 50, $i , 100, 50, 75, 360 , $d arkred , IMG_ARC_NOFILL);
>

Note the >= on the for loop, which fills in a gap that is created without the =
hans at lintoo dot dk
17-Jul-2004 11:14

I found some bugs in my script.. and therefore I am posting the fixes:
Bugs:

$d rakcolor [ 2 ] = imagecolorallocate ( $i m , 139 , 0 , 1 );
//Should be
$d arkcolor [ 2 ] = imagecolorallocate ( $i m , 139 , 0 , 1 );
?>

And then if you modify the code a little and, then make a image 200×125 then you won’t be wasting space.
Changes:

$i m = imagecreate ( 200 , 125 );
// AND
for ( $i = 60 ; $i > 50 ; $i —) <
imagefilledarc ( $i m , 100 , $i , 200 , 100 , $a ngle sum [ $f ] , $a ngle sum [ $n ] , $d arkcolor [ $f ] , IMG_ARC_PIE );
>
// AND
imagefilledarc ( $i m , 100 , 50 , 200 , 100 , $a ngle sum [ $n ] , $a ngle sum [ $i ] , $r andcolor [ $n ] , IMG_ARC_PIE );
?>

you can see a online demo at:
hans at lintoo dot dk
17-Jul-2004 02:27

I modificed the code to make a 3d pie from data collected elsewhere. in this case it was for a statistics page.

when testing you can use:

//Making a image 200 x 200
$i m = imagecreate ( 200 , 200 );

//Setting background color
$b ack ground = imagecolorallocate ( $i m , 226 , 226 , 226 );

//Setting colors of elements
$r andcolor [ 0 ] = imagecolorallocate ( $i m , 255 , 203 , 3 );
$r andcolor [ 1 ] = imagecolorallocate ( $i m , 220 , 101 , 29 );
$r andcolor [ 2 ] = imagecolorallocate ( $i m , 189 , 24 , 51 );
$r andcolor [ 3 ] = imagecolorallocate ( $i m , 214 , 0 , 127 );
$r andcolor [ 4 ] = imagecolorallocate ( $i m , 98 , 1 , 96 );
$r andcolor [ 5 ] = imagecolorallocate ( $i m , 0 , 62 , 136 );
$r andcolor [ 6 ] = imagecolorallocate ( $i m , 0 , 102 , 179 );
$r andcolor [ 7 ] = imagecolorallocate ( $i m , 0 , 145 , 195 );
$r andcolor [ 8 ] = imagecolorallocate ( $i m , 0 , 115 , 106 );
$r andcolor [ 9 ] = imagecolorallocate ( $i m , 178 , 210 , 52 );
$r andcolor [ 10 ] = imagecolorallocate ( $i m , 137 , 91 , 74 );
$r andcolor [ 11 ] = imagecolorallocate ( $i m , 82 , 56 , 47 );

//Setting the darker alt color to the main color
$d arkcolor [ 0 ] = imagecolorallocate ( $i m , 205 , 153 , 0 );
$d arkcolor [ 1 ] = imagecolorallocate ( $i m , 170 , 51 , 0 );
$d rakcolor [ 2 ] = imagecolorallocate ( $i m , 139 , 0 , 1 );
$d arkcolor [ 3 ] = imagecolorallocate ( $i m , 164 , 0 , 77 );
$d arkcolor [ 4 ] = imagecolorallocate ( $i m , 48 , 0 , 46 );
$d arkcolor [ 5 ] = imagecolorallocate ( $i m , 0 , 12 , 86 );
$d arkcolor [ 6 ] = imagecolorallocate ( $i m , 0 , 52 , 129 );
$d arkcolor [ 7 ] = imagecolorallocate ( $i m , 0 , 95 , 145 );
$d arkcolor [ 8 ] = imagecolorallocate ( $i m , 0 , 65 , 56 );
$d arkcolor [ 9 ] = imagecolorallocate ( $i m , 128 , 160 , 2 );
$d arkcolor [ 10 ] = imagecolorallocate ( $i m , 87 , 41 , 24 );
$d arkcolor [ 11 ] = imagecolorallocate ( $i m , 32 , 6 , 0 );

//Getting the data from GET
$i = 0 ;
while ( $i <
$d ata [ $i ] = $_GET [ ++ $i ] ;
>

//Getting ready
$d ata sum = array_sum ( $d ata );
$a ngle sum [ 0 ] = 0 ;
$a ngle [ 0 ] = 0 ;
$i = 0 ;

//Calc the start and end angle position of the elements
while ( $i <
++ $i ;
$n = $i — 1 ;
$part [ $i ] = $d ata [ $n ] / $d ata sum ;
$a ngle [ $i ] = floor ( $part [ $i ] * 360 );
$a ngle sum [ $i ] = array_sum ( $a ngle );
>

/*
//DEBUGGING — only for testing purposes
echo «

«;
print_r ( $part );
print_r ( $a ngle sum );
print_r ( $a ngle );
*/

// make the 3D effect
$n = 0 ; $i = 0 ;
while ( $n <
++ $n ;
$f = $n — 1 ;
if ( $a ngle [ $n ] != 0 ) <
for ( $i = 110 ; $i > 100 ; $i —) <
imagefilledarc ( $i m , 100 , $i , 200 , 100 , $a ngle sum [ $f ] , $a ngle sum [ $n ] , $d arkcolor [ $f ] , IMG_ARC_PIE );
>
>
>

//make the 2d data that sits above the 3deffect
$i = 0 ;
while ( $i <
++ $i ;
$n = $i — 1 ;
if ( $a ngle [ $i ] != 0 ) <
imagefilledarc ( $i m , 100 , 100 , 200 , 100 , $a ngle sum [ $n ] , $a ngle sum [ $i ] , $r andcolor [ $n ] , IMG_ARC_PIE );
>
>

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

caist — www.caist.com
07-Jan-2004 07:11

if you want to place a text onto the edge of a circle you need to
get a point on the circle:

$pos_x = $r adius *sin(deg2rad( $a ngle ));
$pos_y =sqrt( $r adius * $r adius — $pos_x * $pos_x );

if you want the point to be in the middle of a pie piece
you need a starting and ending angle

$pos_x = $r adius *sin(deg2rad( $a ngle _end -( $a ngle _start )/2));
$pos_y =sqrt( $r adius * $r adius — $pos_x * $pos_x );

hope it helps
jphb at scit dot wlv dot ac dot uk
09-Jul-2003 09:19

Note that whereas imagefilledarc() measures angles from
3 o’clock clockwise, imagettftext () measures angles from
3 o’clock anticlockwise so if you’re, for example, trying to
annotate a pie chart it can get a bit confusing.
jcoder at insightbb dot com
05-Oct-2002 06:29

/*
From a set of numbers from a query return and an
array of colors this will generate a pie chart
*/

$a = array ();
while ( $d =mysql_fetch_array( $s tart _angle _query ))
<
$a [ ] = $d [ 0 ] ;
>

/* make two arrays one for start of angle 2nd
for end of angle
*/
$s um =array_sum( $a );
$d egree_adjuster =360/ $s um ;
//constant for circle
array_unshift ( $a ,0 );
// add 0 for start angle
$s tart _angle = array ();
// new array to hold values for start vector
$end_angle = array ();
//new array to hold values for end vector
array_pop ( $a );
//trim one array for start so numbers don’t end on 360
while ( $a ) //iterate till array is empty
<
array_push ( $s tart _angle ,(end( $s tart _angle )+ $a [ 0 ] ));

/*enter numbers in array $s tart _angle adding the last number in
array and adding the first number from modified original array */

array_shift ( $a );//delete first value of array
>
while ( $b )
<
array_push ( $end_angle ,(end( $end_angle )+ $b [ 0 ] ));
array_shift ( $b );
>
for ( $i =0; $i $a ngle _num_rows ; $i ++)
<
imagefilledarc( $pie ,130,149,260,260,
( $s tart _angle [ $i ] * $d egree_adjuster ), $end_angle [ $i ] * $d egree_adjuster ,
$color s [ $i ] ,IMG_ARC_FILL);
>

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��� ����� ��� imagefilledarc

ImageFilledArc — Draw a partial ellipse and fill it

Description

int imagefilledarc (int im, int cx, int cy, int w, int h, int s, int e, int col, int style)

ImageFilledArc() draws a partial ellipse centered at cx , cy (top left is 0, 0) in the image represented by im . W and h specifies the ellipse’s w > s and e arguments. style is a bitwise OR of the following possibilities:


IMG_ARC_PIE and IMG_ARC_CHORD are mutually exclusive; IMG_ARC_CHORD just connects the starting and ending angles with a straight line, while IMG_ARC_PIE produces a rounded edge. IMG_ARC_NOFILL indicates that the arc or chord should be outlined, not filled. IMG_ARC_EDGED , used together with IMG_ARC_NOFILL , indicates that the beginning and ending angles should be connected to the center — this is a good way to outline (rather than fill) a ‘pie slice’.

Note: This function was added in PHP 4.0.6 and requires GD 2.0.1

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