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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" | ||
| "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> | ||
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| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> | ||
| <head> | ||
| <title>Van De Graaf Generator, by Kenneth Ballenegger</title> | ||
| <style type="text/css" media="screen"> | ||
| #container { | ||
| width: 200px; | ||
| height: 200px; | ||
| margin: auto; | ||
| margin-top: 200px; | ||
| } | ||
| </style> | ||
| </head> | ||
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| <body> | ||
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| <div id="container"> | ||
| <?if(!empty($message)):echo $message;endif;?> | ||
| <form action="index.php" method="post" accept-charset="utf-8"> | ||
| <p>Width: <input type="text" name="width" value="0" id="width"></p> | ||
| <p>Height: <input type="text" name="height" value="0" id="height"></p> | ||
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| <p><input type="submit" value="Continue →"></p> | ||
| </form> | ||
| </div> | ||
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| </body> | ||
| </html> |
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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" | ||
| "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> | ||
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| <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> | ||
| <head> | ||
| <title>Van De Graaf Generator, by Kenneth Ballenegger</title> | ||
| <style type="text/css" media="screen"> | ||
| #container { | ||
| width: 200px; | ||
| height: 200px; | ||
| margin: auto; | ||
| margin-top: 200px; | ||
| } | ||
| </style> | ||
| </head> | ||
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| <body> | ||
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| <div id="container"> | ||
| <p>Here's your margins, buddy!</p> | ||
| <p>Top: <?=$top?></p> | ||
| <p>Bottom: <?=$bottom?></p> | ||
| <p>Inside: <?=$inside?></p> | ||
| <p>Outside: <?=$outside?></p> | ||
| </div> | ||
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| </body> | ||
| </html> |
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| <?php | ||
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| // | ||
| // attemplate.inc.php | ||
| // | ||
| // Created by Kenneth Ballenegger on 2009-06-30. | ||
| // Copyright (c) 2009 Arure Talon. All rights reserved. | ||
| // | ||
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| /* | ||
| * | ||
| * ATTemplate | ||
| * | ||
| * A template wrapper, based on the simplicity of using PHP itself for templating. | ||
| * | ||
| */ | ||
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| class ATTemplate | ||
| { | ||
| private $proprieties; | ||
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| // constructor | ||
| // optional $props: initial proprieties array | ||
| function ATTemplate($props=null) | ||
| { | ||
| if(isset($props)) | ||
| if(is_array($props)) | ||
| $this->proprieties = $props; | ||
| else | ||
| $this->proprieties = array(); | ||
| } | ||
|
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| // set $key propriety as $value | ||
| function set($key, $value) | ||
| { | ||
| $this->proprieties[$key] = $value; | ||
| } | ||
|
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| // push array contents into proprieties | ||
| // $props: proprieties array | ||
| function push($props) | ||
| { | ||
| if(is_array($props)) | ||
| foreach($props as $key => $value) | ||
| $this->set($key, $value); | ||
| } | ||
|
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| // parse template $file | ||
| // returns parsed text | ||
| function parse($file) | ||
| { | ||
| $unique_id = uniqid(); | ||
| $file_{$unique_id} = $file; // this is to protect us from the eventuality the user has a propriety named file | ||
| foreach($this->proprieties as $key => $value) | ||
| ${$key} = $value; | ||
| ob_start(); | ||
| require $file_{$unique_id}; | ||
| return ob_get_clean(); | ||
| } | ||
| } | ||
|
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| ?> |
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| @@ -1,83 +1,21 @@ | ||
| <?php | ||
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| function point($x, $y) { | ||
| return array(0=>$x, 1=>$y); | ||
| require_once 'attemplate.inc.php'; | ||
| require_once 'vdg.php'; | ||
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| if (empty($_POST['width']) || empty($_POST['height']) | ||
| || !is_numeric($_POST['width']) || !is_numeric($_POST['height'])) { | ||
| $template = new ATTemplate(array()); | ||
| echo $template->parse('_prompt.tpl'); | ||
| } else { | ||
| $width = $_POST['width']; | ||
| $height = $_POST['height']; | ||
| list($top, $bottom, $inside, $outside) = van_der_graaf($width, $height); | ||
| $template = new ATTemplate(array( | ||
| 'top' => $top, | ||
| 'bottom' => $bottom, | ||
| 'inside' => $inside, | ||
| 'outside' => $outside | ||
| )); | ||
| echo $template->parse('_response.tpl'); | ||
| } | ||
|
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| function intersect($A, $B, $C, $D) { | ||
| $Ax = $A[0]; $Ay = $A[1]; | ||
| $Bx = $B[0]; $By = $B[1]; | ||
| $Cx = $C[0]; $Cy = $C[1]; | ||
| $Dx = $D[0]; $Dy = $D[1]; | ||
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| // Fail if either line is undefined. | ||
| if ($Ax==$Bx && $Ay==$By || $Cx==$Dx && $Cy==$Dy) return NO; | ||
|
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| // (1) Translate the system so that point A is on the origin. | ||
| $Bx-=$Ax; $By-=$Ay; | ||
| $Cx-=$Ax; $Cy-=$Ay; | ||
| $Dx-=$Ax; $Dy-=$Ay; | ||
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| // Discover the length of segment A-B. | ||
| $distAB=sqrt($Bx*$Bx+$By*$By); | ||
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| // (2) Rotate the system so that point B is on the positive X axis. | ||
| $theCos=$Bx/$distAB; | ||
| $theSin=$By/$distAB; | ||
| $newX=$Cx*$theCos+$Cy*$theSin; | ||
| $Cy =$Cy*$theCos-$Cx*$theSin; $Cx=$newX; | ||
| $newX=$Dx*$theCos+$Dy*$theSin; | ||
| $Dy =$Dy*$theCos-$Dx*$theSin; $Dx=$newX; | ||
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| // Fail if the lines are parallel. | ||
| if ($Cy==$Dy) return NO; | ||
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| // (3) Discover the position of the intersection point along line A-B. | ||
| $ABpos=$Dx+($Cx-$Dx)*$Dy/($Dy-$Cy); | ||
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| // (4) Apply the discovered position to line A-B in the original coordinate system. | ||
| $X=$Ax+$ABpos*$theCos; | ||
| $Y=$Ay+$ABpos*$theSin; | ||
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| return(point($X, $Y)); | ||
| } | ||
|
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| // Returns array($top, $bottom, $inside, $outside) | ||
| function van_der_graaf($width, $height) { | ||
| $T = intersect( | ||
| point(0-$width, $height), | ||
| point($width, 0), | ||
| point(0, 0), | ||
| point($width, $height) | ||
| ); | ||
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| $K = intersect( | ||
| point(0, 0), | ||
| point($width, $height), | ||
| point(0-$T[0], $T[1]), | ||
| point($T[0], 0) | ||
| ); | ||
|
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| $O = intersect( | ||
| $K, | ||
| point($width, $K[1]), | ||
| point(0-$width, $height), | ||
| point($width, 0) | ||
| ); | ||
|
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| $B = intersect( | ||
| point(0, 0), | ||
| point($width, $height), | ||
| $O, | ||
| point($O[0], $height) | ||
| ); | ||
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| $top = $K[1]; | ||
| $bottom = $height-$B[1]; | ||
| $inside = $K[0]; | ||
| $outside = $width-$B[0]; | ||
| return array($top, $bottom, $inside, $outside); | ||
| } | ||
|
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| $M = van_der_graaf(7, 10); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| <?php | ||
|
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| function point($x, $y) { | ||
| return array(0=>$x, 1=>$y); | ||
| } | ||
|
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| function intersect($A, $B, $C, $D) { | ||
| $Ax = $A[0]; $Ay = $A[1]; | ||
| $Bx = $B[0]; $By = $B[1]; | ||
| $Cx = $C[0]; $Cy = $C[1]; | ||
| $Dx = $D[0]; $Dy = $D[1]; | ||
|
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| // Fail if either line is undefined. | ||
| if ($Ax==$Bx && $Ay==$By || $Cx==$Dx && $Cy==$Dy) return NO; | ||
|
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| // (1) Translate the system so that point A is on the origin. | ||
| $Bx-=$Ax; $By-=$Ay; | ||
| $Cx-=$Ax; $Cy-=$Ay; | ||
| $Dx-=$Ax; $Dy-=$Ay; | ||
|
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| // Discover the length of segment A-B. | ||
| $distAB=sqrt($Bx*$Bx+$By*$By); | ||
|
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| // (2) Rotate the system so that point B is on the positive X axis. | ||
| $theCos=$Bx/$distAB; | ||
| $theSin=$By/$distAB; | ||
| $newX=$Cx*$theCos+$Cy*$theSin; | ||
| $Cy =$Cy*$theCos-$Cx*$theSin; $Cx=$newX; | ||
| $newX=$Dx*$theCos+$Dy*$theSin; | ||
| $Dy =$Dy*$theCos-$Dx*$theSin; $Dx=$newX; | ||
|
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| // Fail if the lines are parallel. | ||
| if ($Cy==$Dy) return NO; | ||
|
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| // (3) Discover the position of the intersection point along line A-B. | ||
| $ABpos=$Dx+($Cx-$Dx)*$Dy/($Dy-$Cy); | ||
|
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| // (4) Apply the discovered position to line A-B in the original coordinate system. | ||
| $X=$Ax+$ABpos*$theCos; | ||
| $Y=$Ay+$ABpos*$theSin; | ||
|
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| return(point($X, $Y)); | ||
| } | ||
|
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| // Returns array($top, $bottom, $inside, $outside) | ||
| function van_der_graaf($width, $height) { | ||
| $T = intersect( | ||
| point(0-$width, $height), | ||
| point($width, 0), | ||
| point(0, 0), | ||
| point($width, $height) | ||
| ); | ||
|
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| $K = intersect( | ||
| point(0, 0), | ||
| point($width, $height), | ||
| point(0-$T[0], $T[1]), | ||
| point($T[0], 0) | ||
| ); | ||
|
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| $O = intersect( | ||
| $K, | ||
| point($width, $K[1]), | ||
| point(0-$width, $height), | ||
| point($width, 0) | ||
| ); | ||
|
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| $B = intersect( | ||
| point(0, 0), | ||
| point($width, $height), | ||
| $O, | ||
| point($O[0], $height) | ||
| ); | ||
|
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| $top = $K[1]; | ||
| $bottom = $height-$B[1]; | ||
| $inside = $K[0]; | ||
| $outside = $width-$B[0]; | ||
| return array($top, $bottom, $inside, $outside); | ||
| } |