# vim: set fileencoding=utf-8 :

# ***********************IMPORTANT NMAP LICENSE TERMS************************
# *                                                                         *
# * The Nmap Security Scanner is (C) 1996-2011 Insecure.Com LLC. Nmap is    *
# * also a registered trademark of Insecure.Com LLC.  This program is free  *
# * software; you may redistribute and/or modify it under the terms of the  *
# * GNU General Public License as published by the Free Software            *
# * Foundation; Version 2 with the clarifications and exceptions described  *
# * below.  This guarantees your right to use, modify, and redistribute     *
# * this software under certain conditions.  If you wish to embed Nmap      *
# * technology into proprietary software, we sell alternative licenses      *
# * (contact sales@insecure.com).  Dozens of software vendors already       *
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# * detection, and version detection.                                       *
# *                                                                         *
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# * o Integrates source code from Nmap                                      *
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# *   nmap-os-db or nmap-service-probes.                                    *
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# *   not derivative works.)                                                *
# * o Integrates/includes/aggregates Nmap into a proprietary executable     *
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# *                                                                         *
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# * GPL works.                                                              *
# *                                                                         *
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# * but you are not obligated to do so.                                     *
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# *                                                                         *
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# * have been found so far).                                                *
# *                                                                         *
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# *                                                                         *
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# * included with Nmap.                                                     *
# *                                                                         *
# ***************************************************************************/

import math


def is_in_square(point, half_side, center=(0, 0)):
    """
    """
    x, y = point
    a, b = center

    if a + half_side >= x >= a - half_side:
        if b + half_side >= y >= b - half_side:
            return True

    return False


def is_in_circle(point, radius=1, center=(0, 0)):
    """
    """
    x, y = point
    a, b = center

    if ((x - a)**2 + (y - b)**2) <= (radius**2):
        return True

    return False


def atan_scale(point, scale_ceil):
    """
    """
    new_point = float(10.0 * point / scale_ceil) - 5
    return math.atan(abs(new_point))


def normalize_angle(angle):
    """
    """
    new_angle = 360.0 * (float(angle / 360) - int(angle / 360))

    if new_angle < 0:
        return 360 + new_angle

    return new_angle


def is_between_angles(a, b, c):
    """
    """
    a = normalize_angle(a)
    b = normalize_angle(b)
    c = normalize_angle(c)

    if a > b:

        if c >= a and c <= 360 or c <= b:
            return True

        return False

    else:

        if c >= a and c <= b:
            return True

        return False


def angle_distance(a, b):
    """
    """
    distance = abs(normalize_angle(a) - normalize_angle(b))

    if distance > 180:
        return 360 - distance

    return distance


def calculate_short_path(iangle, fangle):
    """
    """
    if iangle - fangle > 180:
        fangle += 360

    if iangle - fangle < -180:
        fangle -= 360

    return iangle, fangle


def angle_from_object(distance, size):
    """
    """
    return math.degrees(math.atan2(size / 2.0, distance))