Lenia in Go

An implementation of Lenia, the continuous Game of Life in Go.

Various static patterns or dynamic life-like shapes can emerge, depending on the parameters values.

Description

Learning Go with an implementation and display of Lenia system (based on a similar approach for reaction-diffusion). The interface is made using the fyne package. The parameters can be tweaked with sliders during the simulation.

Run

go run simulation.go
Add -h for help, to see how to change the default parameters values:

-k display the kernel
-b string
    set the beta parameter as a string where the values   
    are separated by a comma (default "1,0.6,0.3")
-r float
    set the kernel radius (default 80)
-m float
    set the growth center (default 0.23)
-s float
    set the growth width (default 0.024)
-t float
    set the timeline (default 40)

Controls

• During the run, the parameters can be tweaked with sliders.
• The colormap can be changed as well.
• Start/stop and restart buttons allow to manage the simulation.
• Press c to close the window, or ctrl+C in terminal.
• Presss to take a screenshot.

Extra parameters such as window size can be changed in the source code.

Note: The FFT is way faster when the window size is $2^n$, default is 512.

Kernel

As specified above, it is possible to display the kernel only with -k, this will be a static image:

The number of rings and values of peaks depend on the beta (-b) parameter. For now, the kernel core function is exponential and can be changed only by adding a new function in the source code. Same for the growth function.