bash-easing
Simple exponential easing functions written in bash + bc
Demo
Installation
Manually
git clone https://github.com/ArtBIT/bash-easing.git
source path/to/bash-easing/easing.bash
Using bash-clam
clam install ArtBIT/bash-easing && clam source ArtBIT/bash-easing/easing.bash
Usage
Examples
General usage:
ease METHOD VALUE FROM TO
To linearly ease a value from 100 to 200:
ease linear 0 100 200 - would return the start value 100
ease linear 1 100 200 - would return the end value 200
ease linear 0.5 100 200 - would return a value between the 100 and 200, which is 150
ease quad_in_out 0 100 200 - would return the start value 100
ease quad_in_out 1 100 200 - would return the end value 200
ease quad_in_out 0.1 100 200 - would return 102
ease quad_in_out 0.2 100 200 - would return 108
ease quad_in_out 0.3 100 200 - would return 118
ease quad_in_out 0.5 100 200 - would return 150 (all in_out methods, for VALUE 0.5, return arithmetic mean of FROM,TO - (FROM+TO)/2)Testing
To do a rough plot of a easing method, run the following
ease_debug METHOD
# i.e.
ease_debug quad_in
ease_debug quint_out
# etc.