Claw
1.7.3
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00001 /* 00002 CLAW - a C++ Library Absolutely Wonderful 00003 00004 CLAW is a free library without any particular aim but being useful to 00005 anyone. 00006 00007 Copyright (C) 2005-2011 Julien Jorge 00008 00009 This library is free software; you can redistribute it and/or 00010 modify it under the terms of the GNU Lesser General Public 00011 License as published by the Free Software Foundation; either 00012 version 2.1 of the License, or (at your option) any later version. 00013 00014 This library is distributed in the hope that it will be useful, 00015 but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00017 Lesser General Public License for more details. 00018 00019 You should have received a copy of the GNU Lesser General Public 00020 License along with this library; if not, write to the Free Software 00021 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 00022 contact: julien.jorge@gamned.org 00023 */ 00030 /*----------------------------------------------------------------------------*/ 00036 template<double (*Function)(double)> 00037 double claw::tween::symmetric_easing<Function>::ease_in( double t ) 00038 { 00039 return Function(t); 00040 } // symmetric_easing::ease_in() 00041 00042 /*----------------------------------------------------------------------------*/ 00048 template<double (*Function)(double)> 00049 double claw::tween::symmetric_easing<Function>::ease_out( double t ) 00050 { 00051 return 1 - ease_in( 1 - t ); 00052 } // symmetric_easing::ease_out() 00053 00054 /*----------------------------------------------------------------------------*/ 00060 template<double (*Function)(double)> 00061 double claw::tween::symmetric_easing<Function>::ease_in_out( double t ) 00062 { 00063 if ( t < 0.5 ) 00064 return ease_in( 2 * t ) / 2; 00065 else 00066 return 0.5 + ease_out( 2 * t - 1 ) / 2; 00067 } // symmetric_easing::ease_in_out()