note 104593 added to function.imagickdraw-arc

<?php // You can do a pie chart with a combination of arc and polygon functions (there really ought to be a built-in command for this) // create a new canvas object and a white image $canvas = new Imagick(); $canvas->newImage(600, 600, 'grey'); image_pie($canvas, 300, 300, 200, 0, 45, 'red'); image_pie($canvas, 300, 300, 200, 45, 125, 'green'); image_pie($canvas, 300, 300, 200, 125, 225, 'blue'); image_pie($canvas, 300, 300, 200, 225, 300, 'cyan'); image_pie($canvas, 300, 300, 200, 300, 360, 'orange'); // output the image $canvas->setImageFormat('png'); header("Content-Type: image/png"); echo $canvas; exit; // FUNCTIONS function image_arc( &$canvas, $sx, $sy, $ex, $ey, $sd, $ed, $color = 'black' ) { // draw arc on canvas // $sx, $sy, $ex, $ey specify a bounding rectangle of a circle with the origin in the middle // $sd, and $ed specify start and end angles in degrees $draw = new ImagickDraw(); $draw->setFillColor($color); $draw->setStrokeColor($color); $draw->setStrokeWidth(1); $draw->arc($sx, $sy, $ex, $ey, $sd, $ed); $canvas->drawImage($draw); } function image_pie( &$canvas, $ox, $oy, $radius, $sd, $ed, $color = 'black' ) { // draw pie segment // $ox, $oy specify the circle origin // $sd, and $ed specify start and end angles in degrees // degrees start from 0 = East, and go clockwise // position 1 - convert degrees to radians and get first point on perimeter of circle $x1 = $radius * cos($sd / 180 * 3.1416); $y1 = $radius * sin($sd / 180 * 3.1416); // position 2 - convert degrees to radians and get second point on perimeter of circle $x2 = $radius * cos($ed / 180 * 3.1416); $y2 = $radius * sin($ed / 180 * 3.1416); // draw segment triangle - specify the 3 points and draw a polygon $points = array(array('x' => $ox, 'y' => $oy), array('x' => $ox + $x1, 'y' => $ox + $y1), array('x' => $ox + $x2, 'y' => $ox + $y2)); image_polygon($canvas, $points, $color); // draw corrsesponding arc to complete the "pie" segment image_arc($canvas, $ox - $radius, $oy - $radius, $ox + $radius, $oy + $radius, $sd, $ed, $color); } function image_polygon( &$canvas, $points, $color = 'black' ) { // draw a polygon on canvas $draw = new ImagickDraw(); $draw->setFillColor($color); $draw->setStrokeColor($color); $draw->setStrokeWidth(1); $draw->polygon($points); $canvas->drawImage($draw); } ?> ---- Server IP: 92.48.74.199 Probable Submitter: 83.100.207.226 ---- Manual Page -- http://www.php.net/manual/en/function.imagickdraw-arc.php Edit -- https://master.php.net/note/edit/104593 Del: integrated -- https://master.php.net/note/delete/104593/integrated Del: useless -- https://master.php.net/note/delete/104593/useless Del: bad code -- https://master.php.net/note/delete/104593/bad+code Del: spam -- https://master.php.net/note/delete/104593/spam Del: non-english -- https://master.php.net/note/delete/104593/non-english Del: in docs -- https://master.php.net/note/delete/104593/in+docs Del: other reasons-- https://master.php.net/note/delete/104593 Reject -- https://master.php.net/note/reject/104593 Search -- https://master.php.net/manage/user-notes.php