From 6b26bca2593f258cadbca656924b4e6b5c40a7c7 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Sun, 25 Sep 2011 00:05:54 -0700
Subject: meh do stuff

---
 css_shadow.php | 151 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 css_shadow.php

(limited to 'css_shadow.php')

diff --git a/css_shadow.php b/css_shadow.php
new file mode 100644
index 0000000..bdd4adb
--- /dev/null
+++ b/css_shadow.php
@@ -0,0 +1,151 @@
+<?php
+class css_shadow {
+	/** Create a point */
+	public static function xy($x, $y) {
+		return array('x'=>$x, 'y'=>$y);
+	}
+	
+	/** Draw a "line" of shadows between two points */
+	public static function draw_line($p1, $p2, $steps, $color) {
+		$x1 = $p1['x'];
+		$y1 = $p1['y'];
+		$x2 = $p2['x'];
+		$y2 = $p2['y'];
+	
+		$xstep = ($x2-$x1)/($steps-1);
+		$ystep = ($y2-$y1)/($steps-1);
+	
+		$x = $x1;
+		$y = $y1;
+		$str = '';
+		for ($i=0; $i<$steps; $i++) {
+			$str.= sprintf ("\t%fem %fem %s,\n", $x, $y, $color);
+			$x+=$xstep;
+			$y+=$ystep;
+		}
+		return $str;
+	}
+
+	/** Connect the dots */
+	public static function draw_multiline($points, $steps, $color) {
+		$str = '';
+		foreach ($points as $point) {
+			if (isset($prev_point)) {
+				$str.= self::draw_line($prev_point, $point, $steps, $color);
+			}
+			$prev_point = $point;
+		}
+		return $str;
+	}
+	
+	public static function points_border($args) {
+		$left = $right = $top = $bottom = $xoffset = $yoffset = 0;
+		if (isset($args['width'])) {
+			$left = $right = $top = $bottom = $args['width'];
+		}
+		if (isset($args['x'])) {
+			$left = $right = $args['x'];
+		}
+		if (isset($args['y'])) {
+			$top = $bottom = $args['y'];
+		}
+		if (isset($args['left'])) {
+			$left = $args['left'];
+		}
+		if (isset($args['right'])) {
+			$right = $args['right'];
+		}
+		if (isset($args['top'])) {
+			$top = $args['top'];
+		}
+		if (isset($args['bottom'])) {
+			$bottom = $args['bottom'];
+		}
+		if (isset($args['xoffset'])) {
+			$xoffset = $args['xoffset'];
+		}
+		if (isset($args['yoffset'])) {
+			$yoffset = $args['yoffset'];
+		}
+		$p = array('tl'=>self::xy($xoffset-$left , $yoffset-$top   ),
+		           'tr'=>self::xy($xoffset+$right, $yoffset-$top   ),
+		           'bl'=>self::xy($xoffset-$left , $yoffset+$bottom),
+		           'br'=>self::xy($xoffset+$right, $yoffset+$bottom));
+		return $p;
+	}
+	public static function points_border_drop($args) {
+		$xoffset = $yoffset = $xdrop = $ydrop = 0;
+		if (isset($args['xoffset'])) {
+			$xoffset = $args['xoffset'];
+		}
+		if (isset($args['yoffset'])) {
+			$yoffset = $args['yoffset'];
+		}
+		if (isset($args['drop'])) {
+			$xdrop = $ydrop = $args['drop'];
+		}
+		if (isset($args['xdrop'])) {
+			$xdrop = $args['xdrop'];
+		}
+		if (isset($args['ydrop'])) {
+			$ydrop = $args['ydrop'];
+		}
+		
+		$base = self::points_border($args);
+		if ($xdrop==$ydrop && $xdrop==0) { return $base; }
+		$args['xoffset'] = $xoffset+$xdrop;
+		$args['yoffset'] = $yoffset+$ydrop;
+		$drop = self::points_border($args);
+
+		$right   = ($xdrop > 0);
+		$bottom  = ($ydrop > 0);
+
+		/* 0|1
+		 * -+-
+		 * 2|3
+		 */
+		$q = 0;
+		if ($right) $q+=1;
+		if ($bottom) $q+=2;
+		
+		switch ($q) {
+		case 0: // top-left (or bottom-right)
+			// clockwise, start in top-left
+			$ret = array($drop['tl'],
+			             $drop['tr'],
+			             $base['tr'],
+			             $base['br'],
+			             $base['bl'],
+			             $drop['bl'],
+			             $drop['tl']);
+			return $ret;
+		case 1: // top-right (or bottom-left)
+			// clockwise, start in top-right
+			$ret = array($drop['tr'],
+			             $drop['br'],
+			             $base['br'],
+			             $base['bl'],
+			             $base['tl'],
+			             $drop['tl'],
+			             $drop['tr']);
+			return $ret;
+		case 2: /* TODO */ break;
+		case 3: // top-left (or bottom-right)
+			// clockwise, start in top-left
+			$ret = array($base['tl'],
+			             $base['tr'],
+			             $drop['tr'],
+			             $drop['br'],
+			             $drop['bl'],
+			             $base['bl'],
+			             $base['tl']);
+			return $ret;
+		}
+	}
+	public static function draw_border($args) {
+		$steps = 0; $color = '#000000';
+		if (isset($args['steps'])) { $steps = $args['steps']; }
+		if (isset($args['color'])) { $color = $args['color']; }
+		return self::draw_multiline(self::points_border_drop($args), $steps, $color);
+	}
+}
-- 
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