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Old 17 September 2015, 16:01   #3
ReadOnlyCat
Code Kitten

 
Join Date: Aug 2015
Location: Montreal/Canadia
Age: 48
Posts: 1,175
Quote:
Originally Posted by Codetapper View Post
Excellent link!
For those who have difficulties reading Javascript the overarching principle is the following:

1 - divide your screen in rectangular areas
2 - copy each area in a new screen, slightly shifted in a given direction
3 - in the new screen areas where no copied pixels are present, introduce random pixels
4 - display the new screen and swap old/new screen
5 - go to step 1

Code:
     +---------------------+       +----------+----------+
     |                     |       |          |          |
     | CHEEKY      KITTY   |       | CHEEKY   |  KITTY   |
     |                     |       |          |          |
     |                     | +---> +---------------------+ +-+
     |                     |       |          |          |   |
     | WITTY       BUNNY   |       | WITTY    |  BUNNY   |   |
     |                     |       |          |          |   |
     ----------------------+       -----------+----------+   |
                                                             |
+------------------------------------------------------------+ 
|    +----------+
|    |          +-+---------+       +-----------N+---------
|    |    ^     | |         |       | CHEEKY   |O|        |
|    |    |     | |   +->   |       |          |P| KITTY  |
|    +----------+ |         |       +----------+Q|        |
+-> +----------+  +---------+ +---> ABCDEFGHIJKLM+--------- +-+
    |          | +---------+        |         |RVWXYZ012345   |
    |   <-+    | |    |    |        |WITTY    |S|         |   |
    |          | |    v    |        |         |T| BUNNY   |   |
    -----------+-+         |        ----------+U----------+   |
                 ----------+                                  |
                                                              |
+-------------------------------------------------------------+
|    +----------+N---------+
|    | CHEEKY   |O         |
|    |          |P  KITTY  |
|    |          |Q         |
+->  ABCDEFGHIJKLM---------+ +---->    Repeat!  \(^o^)/
     |          RVWXYZ012345
     |WITTY     S          |
     |          T  BUNNY   |
     -----------U----------+
Note that splitting the screen in four will not produce a nice result , you probably need at least 9 areas (3x3) to obtain a pleasing result.

From this simple principle you can then add a lot of variations: copy only one of each pixel every time (alternating which are left/copied every frame), reuse the previous images in a second/third/fourth bitplane, vary the shifting directions over time, copy some bobs in the image from time to time and watch them deform, etc. the possible variations are infinite and I think there are still a lot of nice results yet to be seen.

Last edited by ReadOnlyCat; 17 September 2015 at 16:15. Reason: Cleaned "graphics". :)
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