Hello, I wrote a C++ library to create tweeners and I'm thinking about porting it to Boost. The purpose of the tweeners is to interpolate the intermediate values between two given values during a time interval. Various easing functions can be applied to control the computation of the intermediate values. The library provides the following functionalities: - Interpolation is done on the value of a given variable or using an user-provided callback function, - The interpolated values are computed using a predefined easing function or any user-provided function respecting the contract, - Several tweeners can easily be executed simultaneously or in a row, The documentation of the library is available at http://libclaw.sourceforge.net/tweeners.html and the source code is available at http://sourceforge.net/projects/libclaw/files/libclaw/1.7.1/ as part of a larger library named Claw (check the claw/tween and claw/code/tween folders) Is there an interest to add this tweener library to Boost and what would be the adaptations to do? Regards, -- Julien Jorge