easing_sine.cpp
Go to the documentation of this file.
/*
CLAW - a C++ Library Absolutely Wonderful
CLAW is a free library without any particular aim but being useful to
anyone.
Copyright (C) 2005-2011 Julien Jorge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
contact: julien.jorge@gamned.org
*/
#include <claw/tween/easing/easing_sine.hpp>
#include <boost/math/constants/constants.hpp>
#include <cmath>
double claw::tween::easing_sine_func( double t )
{
const double pi( boost::math::constants::pi<double>() );
return 1 - std::cos(t * pi / 2);
} // easing_sine_func()
easing_sine.hpp
Easing functions for the tweener.
claw::tween::easing_sine_func
double easing_sine_func(double t)
The default function.
Definition: easing_sine.cpp:39