imagefilledarc

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. Restituisce TRUE in caso di successo, FALSE in caso di fallimento. 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:

1. IMG_ARC_PIE

2. IMG_ARC_CHORD

3. IMG_ARC_NOFILL

4. IMG_ARC_EDGED

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'.

Esempio 1. Creating a 3D looking pie <?php // create image $image = imagecreatetruecolor(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); ?>