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Diffstat (limited to 'elements/tools.py')
| -rw-r--r-- | elements/tools.py | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/elements/tools.py b/elements/tools.py new file mode 100644 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 +
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