★ wanayoo — archive 1999 http://www.php.net/manual/ja/function.imagearc.php

Nouvelle recherche | Portail wanayoo

PHP Home Page

	グラフィックス
		GetImageSize
		ImageArc
		ImageChar
		ImageCharUp
		ImageColorAllocate
		ImageColorDeAllocate
		ImageColorAt
		ImageColorClosest
		ImageColorExact
		ImageColorResolve
		ImageGammaCorrect
		ImageColorSet
		ImageColorsForIndex
		ImageColorsTotal
		ImageColorTransparent
		ImageCopy
		ImageCopyResized
		ImageCreate
		ImageCreateFromGif
		ImageCreateFromJPEG
		ImageCreateFromPNG
		ImageDashedLine
		ImageDestroy
		ImageFill
		ImageFilledPolygon
		ImageFilledRectangle
		ImageFillToBorder
		ImageFontHeight
		ImageFontWidth
		ImageGif
		ImagePng
		ImageJPEG
		ImageInterlace
		ImageLine
		ImageLoadFont
		ImagePolygon
		ImagePSBBox
		ImagePSEncodeFont
		ImagePSFreeFont
		ImagePSLoadFont
		ImagePsExtendFont
		ImagePsSlantFont
		ImagePSText
		ImageRectangle
		ImageSetPixel
		ImageString
		ImageStringUp
		ImageSX
		ImageSY
		ImageTTFBBox
		ImageTTFText
		ImageTypes
		read_exif_data

Manual: ImageArc

Updated
Sat, 12 Aug 2000

ImageArc

(unknown)

ImageArc -- 部分楕円の描画

説明

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

ImageArc()は、imで示す画像上にcx、 cyを中心(左上が0,0)とする部分楕円を描画します。 wとhはそれぞれ楕円の幅と高さを指定します。一方、始点と終点は引数sと eにより度(deg)で指定します。

User Contributed Notes: ImageArc

andrea@labo.net
22-Dec-1999 09:53

in php 3.05 (debian 2.1r4) drawing a circle is impossible: the function imagearc($im,100,100,30,30,0,360,$black) doesn't draw anything, but imagearc($im,100,100,30,30,0,359,$black) draws a circle (more or less).

travis@duluth.com
22-Dec-1999 06:36

The wierd thing is that the first two integers tell where to place the "circle". So for example I first create the "pallet" to place the circle on. $image = imagecreate(500, 500); (this makes a huge 500x500 gif :) ) $colorBody = imagecolorallocate($image, 0, 0, 0); (make the default color of the "pallet" black $circleColor = imagecolorallocate($image, 255, 0, 255); (going to make the circle an ugly pink color) imagearc($image, 250, 250, 300, 300, 0, 360, $circleColor); Places the image in the center (250,250) and the circle is 300 pixels in diameter. Hope this helps. Travis Kent Beste

light@buypages.com
23-Dec-1999 03:36

<PRE>You should note that: a) the arc is drawn counter-clockwise b) angle=0 is at the three-o'clock position hence, 90 == 6 o'clock, 180=9 'oclock etc. </PRE>

lbattraw@att.com
12-Apr-2000 02:33

Also remember that 0 degrees and 360 degrees are mathematically identical (per note #1); you're essentially specifying the same point if you use 0 and 360 as start and end angles, respectively. It's open to debate whether or not this should be construed as drawing a whole circle or nothing at all...

i_patton@hotmail.com
28-Apr-2000 06:15

I have code that works in creating a picture, and then outputting it to a file (I can tell because the file shows), but none of the commands to draw inside the new gif, including imagearc, work. The picture, no matter what I do, is identical to the original picture. Anybody know why? | Liam |

rolf.winterscheidt@it-mannesmann.de
24-Jul-2000 04:27

How do I get something like ImageFilledArc? I need a partial filled circle, not the whole thing filled. Rolf

rupert@complinet.com
02-Aug-2000 12:15

can anyone think of a way of aliasing the curve? ps; re:filled arc; you're going to have to draw in the radii and then use imagefill()

Updated
Sat, 12 Aug 2000

Located in
United States

Elements of this website are subject to copyright.
Questions about installing or using PHP should be directed to one of the mailing lists.
Only questions about the website should be directed to webmaster@php.net.