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# Autostereogram
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TODO
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## Random Dots
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TODO
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```
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.:,oX#r-'/=*miQ .:,oX#r-'/=*miQ .:,oX#r-'/=*miQ .:,oX#r-'/=*miQ .:,oX#r-'/=*miQ .:,oX#r-'/=*miQ
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miQ)35;_0p]w@x4EmiQ)35;_0p]w@x4EmiQ)35;_0p]w@x4EmiQ)35;_0p]w@x4EmiQ)35;_0p]w@x4EmiQ)35;_0p]w@x4E
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x4EY!{ .:,oX#r-'x4EY!{ .:,oX#r-'x4EY!{ .:,oX#r-'x4EY!{ .:,oX#r-'x4EY!{ .:,oX#r-'x4EY!{ .:,oX#r-'
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r-'/=*miQ)35;_0pr'/=*miQ)35;_00pr'/=*miQ)35;_00pr'/=*miQ)35;_00pr'/=*miQ)35;_00pr'/=*miQ)35;_00p
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_0p]w@x4EY!{ .:,_0]w@x4EY!{ ..:,_0]w@x4EY!..:,_0]w@x4EY!..:.:,_0]w@x4EY!..:.:,_0]w@x4EY!..:.:,_0
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.:,oX#r-'/=*miQ).:,o#r-'/=**miQ).:,o#r-'/=*iQ).:,o#r-'/=*iQ).).:,o#r-'/=*iQ.).:,o#r-''/=*iQ).).:
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iQ)35;_0p]w@x4EYiQ)3;_0p]w@@x4EYiQ)3;_0p]w@@EYiQ)3;3;_0w@@EYiQiQ)3;3;_0w@EYiQiQ)3;3;_0w@@EYYiQiQ
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4EY!{ .:,oX#r-'/4EY! .:,oX##r-'/4EY! .:,oX##'/4EY! ! .:,##'/4E4EY! ! .,##'/4E44EY! .,##''//4E4E
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-'/=*miQ)35;_0p]-'/=miQ)35;;_0p]-'/=miQ)35;;p]-'/=m=miQ);;p]-'-'/=m=mi);;p]-''-'/=m=i);;p]]]-'-'
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0p]w@x4EY!{ .:,o0p]wx4EY!{ .:,o0p]wx4EY!{ ,o0p]wxwx4!{ ,o0o0p]wxwx4{ ,o0o00p]wxwx4{ ,oo0o0p
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:,oX#r-'/=*miQ)3:,oXr-'/=*mmiQ)3:,oXr-'/=*mm)3:,oXr-'/=*mm)3)3:,oXr-'/=*m)3)3:,oXr-''/=*m)33)3:,
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Q)35;_0p]w@x4EY!Q)35_0p]w@xx4EY!Q)350pp]w@xxY!Q)350pp]w@xxY!Y!Q)350pp]w@xxY!!Q)350pp]w@xxxY!Y!Q)
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EY!{ .:,oX#r-'/=EY!{.:,oX#rr-'/=EY!{:,,oX#rr/=EY!{:{:,,#rr/=E=EY!{:{:,,#rr/=E=EY{:{:,,#rrr/=E=EY
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'/=*miQ)35;_0p]w'/=*iQ)35;__0p]w'/*iQ))35;__]w'/*iQiQ))3__]w'/'/*iQi))3__]ww'/'/*ii))3__]www'/'/
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p]w@x4EY!{ .:,oXp]wx4EY!{ .:,oXp]wx4EYY!{ .:Xpp]x4E4EYY!{:Xpp]]]x4E4YY!{:Xppp]]]x4EYY!{:Xpppp]]]
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,oX#r-'/=*miQ)35,o#r-'/=*miQ)35,o#r-'//=*miQ5,,or-'/'//=*Q5,,oo#r-'/'/=*Q5,,ooo#r-/'/=*Q5,,,,oo#
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)35;_0p]w@x4EY!{)35;_0p]w@x4EY!{)35;_0p]w@xY!{)35;_0p0p]wY!{)3)3_;_0p0]wY!{)3)35;_0p0]wY!!{{)3)3
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Y!{ .:,oX#r-'/=*Y!{ .:,oX#r-'/=*Y!{ .:,oX#r-'/=*Y!{ .:,oX#r-'/=*Y!{ .:,oXr-'/=*Y!{ .:,,oXr--'/=*
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/=*miQ)35;_0p]w@/=*miQ)35;_0p]w@/=*miQ)35;_0p]w@/=*miQ)35;_0p]w@/=*miQ)35;_0p]w@/=*miQ)35;_0p]w@
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]w@x4EY!{ .:,oX#]w@x4EY!{ .:,oX#]w@x4EY!{ .:,oX#]w@x4EY!{ .:,oX#]w@x4EY!{ .:,oX#]w@x4EY!{ .:,oX#
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```
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*If you look at this image the correct way, you'll see a 3D image of big letters spelling out LRS.*
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The following is a [C](c.md) program that generates the above image.
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```
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#include <stdio.h>
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#define PATTERN_SIZE 16
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#define RES_X 75
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#define RES_Y 20
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#define PATTERN_SEED_SIZE 32
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char patternSeed[PATTERN_SEED_SIZE] = " .:,oX#r-'/=*miQ)35;_0p]w@x4EY!{";
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char depth[RES_X * RES_Y + 1] = // must be big and simple to be easily seen
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" "
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" "
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" "
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" 1111111111111 "
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" 11111111111 22222222222222222 "
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" 1111111 222222222222222222 1111111111 "
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" 1111111 2222222 2222222 1111111111111111 "
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" 1111111 2222222 222222 11111111 111111 "
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" 1111111 2222222 222222 1111111 111111 "
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" 1111111 2222222 2222222 11111111 "
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" 1111111 2222222222222222 111111111111 "
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" 1111111 11 2222222222222222 111111111111 "
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" 1111111 11 2222222 222222 111111111 "
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" 1111111 1111 2222222 222222 1111111 11111111 "
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" 1111111111111111111 2222222 222222 1111111 1111111 "
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" 11111111111111111111 22222222 2222222 11111111 11111111 "
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" 2222222222 22222222 1111111111111111111 "
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" 1111111111111 "
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" "
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" ";
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char buffer1[PATTERN_SIZE + 1];
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char buffer2[PATTERN_SIZE + 1];
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int charToDepth(char c)
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{
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return c == ' ' ? 0 : (c - '0');
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}
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int main(void)
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{
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const char *c = depth;
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char *lineCurrent, *linePrev;
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buffer1[PATTERN_SIZE] = 0;
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buffer2[PATTERN_SIZE] = 0;
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for (int j = 0; j < RES_Y; ++j)
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{
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for (int i = 0; i < PATTERN_SIZE; ++i) // initiate first pattern from seed
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buffer1[i] = patternSeed[(i + (j * 13)) % PATTERN_SEED_SIZE];
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lineCurrent = buffer1;
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linePrev = buffer2;
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for (int i = 0; i < RES_X; ++i)
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{
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if (i % PATTERN_SIZE == 0)
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{
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printf("%s",lineCurrent); // print the rendered line
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char *tmp = lineCurrent; // swap previous and current buffer
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lineCurrent = linePrev;
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linePrev = tmp;
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}
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lineCurrent[i % PATTERN_SIZE] = // draw the offset pixel
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linePrev[(PATTERN_SIZE + i + charToDepth(*c)) % PATTERN_SIZE];
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c++;
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}
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printf("%s\n",lineCurrent); // print also the last buffer
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}
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return 0;
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}
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```
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