snake evolution, GP
See this anitmation here:
http://www.youtube.com/watch?v=eEvPD0pPvrk
To fast test the code run
zz_fast.m to make evolution
then run zz_motion_terst_1_snakes.m to see history of this evolution as animation of best individuals.
Snake evolution is made as Genenetic programming. Gene Expression Programming (GEP) was used. GEP is developed by FERREIRA. FERREIRA's articles is incuded in pdf files. It is parameterization of binary tree of sequence of mathematics operations.
Snake shape is represented as function f=f(d,t), where t is time. Snake is links where angles between links is controeld with angles phi=phi(t), angles phi is differences of f function. For example:
phi(1)=f(L,t)-f(0,t)
phi(2)=f(2*L,t)-f(L,t)
phi(3)=f(4*L,t)-f(2*L,t)
ect.
So if phi not too big then shape of snake is f(d,t) function.
It is classic GP with crossover and mutations. Two point crossover was used. Elitism was used. In gene head size is 24, that means that formula can have 24 operations max. + - * / sin cos sign operations was used. phi angle cannot be more then pi/2 at absolute value.
Citar como
Maxim Vedenyov (2024). snake evolution, GP (https://www.mathworks.com/matlabcentral/fileexchange/33608-snake-evolution-gp), MATLAB Central File Exchange. Recuperado .
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