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"""
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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