- Main Page
- Namespaces
- Classes
- Files

- File List

# Randomizer.cpp

    00001
    00002 //
    00003 // SFML - Simple and Fast Multimedia Library
    00004 // Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)
    00005 //
    00006 // This software is provided 'as-is', without any express or implied warranty.
    00007 // In no event will the authors be held liable for any damages arising from the use of this software.
    00008 //
    00009 // Permission is granted to anyone to use this software for any purpose,
    00010 // including commercial applications, and to alter it and redistribute it freely,
    00011 // subject to the following restrictions:
    00012 //
    00013 // 1. The origin of this software must not be misrepresented;
    00014 //    you must not claim that you wrote the original software.
    00015 //    If you use this software in a product, an acknowledgment
    00016 //    in the product documentation would be appreciated but is not required.
    00017 //
    00018 // 2. Altered source versions must be plainly marked as such,
    00019 //    and must not be misrepresented as being the original software.
    00020 //
    00021 // 3. This notice may not be removed or altered from any source distribution.
    00022 //
    00024
    00026 // Headers
    00028 #include <SFML/System/Randomizer.hpp>
    00029 #include <SFML/System/Platform.hpp>
    00030 #include <cstdlib>
    00031
    00032
    00033 namespace
    00034 {
    00035     // Set the random numbers sequence seed with the current system time, so that it is always different
    00036     unsigned int SetRandomSeed()
    00037     {
    00038         unsigned int Seed = static_cast<unsigned int>(sf::priv::Platform::GetSystemTime() * 1000);
    00039         srand(Seed);
    00040         return Seed;
    00041     }
    00042 }
    00043
    00044
    00045 namespace sf
    00046 {
    00048 // Static member variables
    00050 unsigned int Randomizer::ourSeed = SetRandomSeed();
    00051
    00052
    00057 void Randomizer::SetSeed(unsigned int Seed)
    00058 {
    00059     srand(Seed);
    00060     ourSeed = Seed;
    00061 }
    00062
    00063
    00067 unsigned int Randomizer::GetSeed()
    00068 {
    00069     return ourSeed;
    00070 }
    00071
    00072
    00076 float Randomizer::Random(float Begin, float End)
    00077 {
    00078     // This is not the best algorithm, but it is fast and will be enough in most cases
    00079     // (see Google for best approaches)
    00080
    00081     return static_cast<float>(rand()) / RAND_MAX * (End - Begin) + Begin;
    00082 }
    00083
    00084
    00088 int Randomizer::Random(int Begin, int End)
    00089 {
    00090     // This is not the best algorithm, but it is fast and will be enough in most cases
    00091     // (see Google for best approaches)
    00092
    00093     return rand() % (End - Begin + 1) + Begin;
    00094 }
    00095
    00096 } // namespace sf

:: Copyright © 2007-2008 Laurent Gomila, all rights reserved :: Documentation generated by doxygen 1.5.2 ::