Logo Search packages:      
Sourcecode: nmap version File versions  Download package

Interpolation.py

# vim: set fileencoding=utf-8 :

# ***********************IMPORTANT NMAP LICENSE TERMS************************
# *                                                                         *
# * The Nmap Security Scanner is (C) 1996-2009 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       *
# * license Nmap technology such as host discovery, port scanning, OS       *
# * detection, and version detection.                                       *
# *                                                                         *
# * Note that the GPL places important restrictions on "derived works", yet *
# * it does not provide a detailed definition of that term.  To avoid       *
# * misunderstandings, we consider an application to constitute a           *
# * "derivative work" for the purpose of this license if it does any of the *
# * following:                                                              *
# * o Integrates source code from Nmap                                      *
# * o Reads or includes Nmap copyrighted data files, such as                *
# *   nmap-os-db or nmap-service-probes.                                    *
# * o Executes Nmap and parses the results (as opposed to typical shell or  *
# *   execution-menu apps, which simply display raw Nmap output and so are  *
# *   not derivative works.)                                                * 
# * o Integrates/includes/aggregates Nmap into a proprietary executable     *
# *   installer, such as those produced by InstallShield.                   *
# * o Links to a library or executes a program that does any of the above   *
# *                                                                         *
# * The term "Nmap" should be taken to also include any portions or derived *
# * works of Nmap.  This list is not exclusive, but is meant to clarify our *
# * interpretation of derived works with some common examples.  Our         *
# * interpretation applies only to Nmap--we don't speak for other people's  *
# * GPL works.                                                              *
# *                                                                         *
# * If you have any questions about the GPL licensing restrictions on using *
# * Nmap in non-GPL works, we would be happy to help.  As mentioned above,  *
# * we also offer alternative license to integrate Nmap into proprietary    *
# * applications and appliances.  These contracts have been sold to dozens  *
# * of software vendors, and generally include a perpetual license as well  *
# * as providing for priority support and updates as well as helping to     *
# * fund the continued development of Nmap technology.  Please email        *
# * sales@insecure.com for further information.                             *
# *                                                                         *
# * As a special exception to the GPL terms, Insecure.Com LLC grants        *
# * permission to link the code of this program with any version of the     *
# * OpenSSL library which is distributed under a license identical to that  *
# * listed in the included COPYING.OpenSSL file, and distribute linked      *
# * combinations including the two. You must obey the GNU GPL in all        *
# * respects for all of the code used other than OpenSSL.  If you modify    *
# * this file, you may extend this exception to your version of the file,   *
# * but you are not obligated to do so.                                     *
# *                                                                         *
# * If you received these files with a written license agreement or         *
# * contract stating terms other than the terms above, then that            *
# * alternative license agreement takes precedence over these comments.     *
# *                                                                         *
# * Source is provided to this software because we believe users have a     *
# * right to know exactly what a program is going to do before they run it. *
# * This also allows you to audit the software for security holes (none     *
# * have been found so far).                                                *
# *                                                                         *
# * Source code also allows you to port Nmap to new platforms, fix bugs,    *
# * and add new features.  You are highly encouraged to send your changes   *
# * to nmap-dev@insecure.org for possible incorporation into the main       *
# * distribution.  By sending these changes to Fyodor or one of the         *
# * Insecure.Org development mailing lists, it is assumed that you are      *
# * offering the Nmap Project (Insecure.Com LLC) the unlimited,             *
# * non-exclusive right to reuse, modify, and relicense the code.  Nmap     *
# * will always be available Open Source, but this is important because the *
# * inability to relicense code has caused devastating problems for other   *
# * Free Software projects (such as KDE and NASM).  We also occasionally    *
# * relicense the code to third parties as discussed above.  If you wish to *
# * specify special license conditions of your contributions, just say so   *
# * when you send them.                                                     *
# *                                                                         *
# * 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 v2.0 for more details at                         *
# * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file       *
# * included with Nmap.                                                     *
# *                                                                         *
# ***************************************************************************/


00089 class Linear2DInterpolator:
    """
    Implements a bidimesional linear interpolator.
    """

00094     def __init__(self):
        """
        Constructor method of Linear2DInterpolator class
        """
        self.__start_point = (0, 0)
        """Initial point of interpolation"""
        self.__final_point = (0, 0)
        """Final point of interpolation"""
        self.__interpolated_points = []
        """Interpolated points vector"""


00106     def set_start_point(self, a, b):
        """
        Set initial coordinate
        Set final coordinate
        @type  a: number
        @param a: The first component of final point
        @type  b: number
        @param b: The second component of final point
        """
        self.__start_point = (a, b)


00118     def set_final_point(self, a, b):
        """
        Set final coordinate
        @type  a: number
        @param a: The first component of final point
        @type  b: number
        @param b: The second component of final point
        """
        self.__final_point = (a, b)


00129     def get_weighed_points(self, number_of_pass, pass_vector):
        """
        Return the vector of coordinates between the initial and final
        coordinates with the specified size
        @type  number_of_pass: number
        @param number_of_pass: The number of pass of interpolation
        @rtype: list
        @return: A list of tuples with interpolated points
        """
        (ai, bi) = self.__start_point
        (af, bf) = self.__final_point

        a_conversion_factor = float(af - ai) / sum(pass_vector)
        b_conversion_factor = float(bf - bi) / sum(pass_vector)

        a_pass = 0
        b_pass = 0

        self.__interpolated_points = range(number_of_pass)

        for i in range(0, number_of_pass):

            a_pass += pass_vector[i] * a_conversion_factor
            b_pass += pass_vector[i] * b_conversion_factor
            self.__interpolated_points[i] = (ai + a_pass, bi + b_pass)

        return self.__interpolated_points


00158     def get_points(self, number_of_pass):
        """
        Return the vector of coordinates between the initial and final
        coordinates with the specified size
        @type  number_of_pass: number
        @param number_of_pass: The number of pass of interpolation
        @rtype: list
        @return: A list of tuples with interpolated points
        """
        (ai, bi) = self.__start_point
        (af, bf) = self.__final_point

        a_pass = float(af - ai) / number_of_pass
        b_pass = float(bf - bi) / number_of_pass

        self.__interpolated_points = range(number_of_pass)

        for i in range(1, number_of_pass + 1):
            self.__interpolated_points[i - 1] = (ai + a_pass * i,
                                                 bi + b_pass * i)

        return self.__interpolated_points



if __name__ == "__main__":

    # Testing application

    i = Linear2DInterpolator()

    i.set_start_point(0, 0)
    i.set_final_point(1, 1)

    print len(i.get_points(10)), i.get_points(10)


Generated by  Doxygen 1.6.0   Back to index