From 392a0c5a4d19da8f06b3ccab8b9d7fdcd558e64d Mon Sep 17 00:00:00 2001
From: Brian Jordan <brian@laptop.org>
Date: Fri, 27 Jun 2008 18:17:45 +0000
Subject: Initial commit

---
(limited to 'elements/tools.py')

diff --git a/elements/tools.py b/elements/tools.py
new file mode 100755
index 0000000..9851ff8
--- /dev/null
+++ b/elements/tools.py
@@ -0,0 +1,65 @@
+"""
+This file is part of the 'Elements' Project
+Elements is a 2D Physics API for Python (supporting Box2D2)
+
+Copyright (C) 2008, The Elements Team, <elements@linuxuser.at>
+
+Home:  http://elements.linuxuser.at
+IRC:   #elements on irc.freenode.org
+
+Code:  http://www.assembla.com/wiki/show/elements
+       svn co http://svn2.assembla.com/svn/elements                     
+
+License:  GPLv3 | See LICENSE for the full text
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.              
+"""
+# Some Hex Tools
+def hex2dec(hex):
+    """ Convert and hex value in a decimal number
+    """ 
+    return int(hex, 16)
+
+def hex2rgb(hex): 
+    """ Convert a hex color (#123abc) in RGB ((r), (g), (b))
+    """
+    if hex[0:1] == '#': hex = hex[1:]; 
+    return (hex2dec(hex[:2]), hex2dec(hex[2:4]), hex2dec(hex[4:6]))
+
+def rgb2floats(rgb):
+    """Convert a color in the RGB (0..255,0..255,0..255) format to the
+       (0..1, 0..1, 0..1) float format
+    """
+    ret = []
+    for c in rgb:
+        ret.append(float(c) / 255)
+    return ret
+
+def point_in_poly(point, poly):
+    #print ">", point, poly
+    x, y = point
+    n = len(poly)
+    inside = False
+    p1x,p1y = poly[0]
+    for i in range(n+1):
+        p2x,p2y = poly[i % n]
+        if y > min(p1y,p2y):
+            if y <= max(p1y,p2y):
+                if x <= max(p1x,p2x):
+                    if p1y != p2y:
+                        xinters = (y-p1y)*(p2x-p1x)/(p2y-p1y)+p1x
+                    if p1x == p2x or x <= xinters:
+                        inside = not inside
+        p1x,p1y = p2x,p2y
+    return inside
+    
\ No newline at end of file
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