changelog
    
    
    - Thu, 13 Feb 2020 12:51:27 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 13 Feb 2020 12:51:27 +0200] rev 53
 
    - added grid program
 
    - Sat, 08 Feb 2020 00:08:57 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Sat, 08 Feb 2020 00:08:57 +0200] rev 52
 
    - avoid having the null id in the selection
 
    - Fri, 07 Feb 2020 23:59:06 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 07 Feb 2020 23:59:06 +0200] rev 51
 
    - selection works now
 
    - Fri, 07 Feb 2020 02:02:16 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 07 Feb 2020 02:02:16 +0200] rev 50
 
    - fix some warnings
 
    - Fri, 07 Feb 2020 02:01:21 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 07 Feb 2020 02:01:21 +0200] rev 49
 
    - wrote the id color in terms of the id value in the shader now that I can get the id to the shader properly
 
    - Fri, 07 Feb 2020 01:58:34 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Fri, 07 Feb 2020 01:58:34 +0200] rev 48
 
    - added selection highlighting
 
    - Thu, 06 Feb 2020 23:41:20 +0200
 
    - by Teemu Piippo <teemu@hecknology.net> [Thu, 06 Feb 2020 23:41:20 +0200] rev 47
 
    - picking works now