Created
July 23, 2022 21:58
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Julia Set Animation. Please resize terminal window accordingly =). Only works on linux system.
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| #include <stdio.h> | |
| #include <sys/ioctl.h> | |
| #include <unistd.h> | |
| #include <math.h> | |
| #include <inttypes.h> | |
| #include <time.h> | |
| #include <stdlib.h> | |
| #define ITERNUM 50 | |
| #define THRESH 10 | |
| #define GRAN 0.015 | |
| /* | |
| ......: :...... | |
| ..... :......... | |
| ........ #........... | |
| .........:- ::................ | |
| ......... ::.......................... | |
| ........::: -: : ............................ | |
| ...... * :.................................................... | |
| ......: :...................:: ........................:=- ... | |
| ........:: =--::............. - + ................... ..... | |
| ..........: :::::...:::...:== :.................. :....... | |
| ...........: +=# -::- -:::-# .........: :::: ....... | |
| ..............::: -- -- ::......: = + +::.......... | |
| ................:: -::::::::::- -::........... | |
| ................::::--= -::- - * -: ........ | |
| ...............: :-::- % +-= .......... | |
| ............. ::- +-= % + *-:::::.. =-... | |
| ...............- + + .... | |
| ..................: *-..... | |
| ....................: .... | |
| ..........................:: .. | |
| ..............................:::- = =.. | |
| .................................::::--=* -: ::: ::..::.::.. | |
| ..... :........................:::: -- :...::- :.......... | |
| ....... = :.......: :..........: % +% *-:::::................ | |
| .......: :::::: :::......:::- -- =::................ | |
| ........:: *- -::::::::- -:::::- -:............. | |
| ........: -:::::::::: % -:::::: .......... | |
| .........:: --::::--::--- @#=---::::....:: - ......... | |
| ........ =-+ +-==+ -::::............: ........ | |
| ......... = + ::....................... | |
| ............: :..................... | |
| .............: %= + :.................... | |
| ................:::- -- ::::................. | |
| ..................:::- # =--:::::.................. | |
| ...................::::::- + :::.................. | |
| ...................* - === %-:::............... | |
| ..................... .............. | |
| ...................... # * =:::.......... | |
| .......::..............:: @ = ==+ :........ | |
| ........: =:..::.......:::::-** +==--- = --- - ....... | |
| ........... :::::::: - - --:::::::::--= :......... | |
| ........... -::::: ::::::::: + ......... | |
| ..............: ----:-= -::::::::+ - = :......... | |
| ................::: * -= :::........:- = :..::- ...... | |
| ......... .......- -- + * -- :.....................: :...... | |
| .......... :..:: --:::::..........................:...... | |
| ..+ :: ::- = -::= ++ ==--::::................................ | |
| ... + #- ::............................. | |
| .. -- - ........................ | |
| .... :................... | |
| .....: :................. | |
| .... - - - *+ .............. | |
| ...........: @==+ --- :::: ............ | |
| ..........- -- #= -::::::............... | |
| .......:: :: =-- ::::--= * = :::................. | |
| ...........:: :::::::::-= + =::............... | |
| ......... - -:= :......:: -: --= #% --: ............. | |
| ....... -::..:=..........: -::::- ::::----+ =........... | |
| ......: :..................: ::...........:::: =::.......... | |
| ..... = - ...................: ::.: ..............: - -....... | |
| ....................................................:= ...... | |
| ..................................................: - ..... | |
| ............................: ::= =:.......... | |
| .....................:: ......... | |
| ............... :......... | |
| .......... - :...... | |
| ........ :.:.... | |
| ^Z | |
| */ | |
| int main() { | |
| //[-2 0.5] | |
| //[-1 1] | |
| float y1 = -1; | |
| float y2 = 1; | |
| float x1 = -2; | |
| float x2 = 2; | |
| char pixelmap[] = {' ',' ',' ',' ',' ', | |
| '.','.','.','.','.', | |
| ':',':',':',':',':', | |
| '-','-','-','-','-', | |
| '=','=','=','=','=', | |
| '+','+','+','+','+', | |
| '*','*','*','*','*', | |
| '#','#','#','#','#', | |
| '%','%','%','%','%', | |
| '@','@','@','@','@'}; | |
| srand(time(NULL)); | |
| float ca,cb; | |
| ca = -0.79; | |
| cb = 0.15; | |
| while (1) { | |
| //Change fractal's shape by randomly changing c. | |
| if (rand()%2) ca += 0.01; | |
| else cb += 0.01; | |
| for (float b = y1; b < y2; b+=GRAN*2) { | |
| for (float a = x1; a < x2; a+=GRAN) { | |
| //z_0 | |
| float za = a; | |
| float zb = b; | |
| //z_(n+1) | |
| float wa,wb; | |
| //Max num of iterations where the result does not tend to infinity. | |
| int max_n = 0; | |
| //As n -> ∞, does z_n tend to infinity? | |
| for (int n = 0; n < ITERNUM; n++) { | |
| //Compute z_(n+1) using the value of z_n and the current point | |
| wa = (za*za - zb*zb) + ca; | |
| wb = 2*za*zb + cb; | |
| if (sqrt(wa*wa + wb*wb) > THRESH) { | |
| //z_n is tending to infinity. C is not in Mandelbrot set. | |
| max_n = n; | |
| break; | |
| } | |
| za = wa; | |
| zb = wb; | |
| } | |
| //Display point according to max_n. | |
| putc(pixelmap[max_n],stdout); | |
| } | |
| putc('\n',stdout); | |
| } | |
| usleep(100000); | |
| system("clear"); | |
| } | |
| return 0; | |
| } |
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