changelog
    
    
    - Sun, 17 Jun 2018 13:57:00 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 17 Jun 2018 13:57:00 +0300] rev 1404
 
    - replaced GLRotationMatrix with QMatrix4x4
 
    - Sun, 17 Jun 2018 13:53:33 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 17 Jun 2018 13:53:33 +0300] rev 1403
 
    - replaced the Matrix class with QMatrix4x4
 
    - Sun, 10 Jun 2018 23:25:08 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 10 Jun 2018 23:25:08 +0300] rev 1402
 
    - some rework in description
 
    - Sun, 10 Jun 2018 23:07:24 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 10 Jun 2018 23:07:24 +0300] rev 1401
 
    - fixed bugs regarding circular primitives
 
    - Sun, 10 Jun 2018 21:48:58 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 10 Jun 2018 21:48:58 +0300] rev 1400
 
    - refactored LDPolygon
 
    - Sun, 10 Jun 2018 17:17:42 +0300
 
    - by Teemu Piippo <teemu@hecknology.net> [Sun, 10 Jun 2018 17:17:42 +0300] rev 1399
 
    - added the disc and disc negative to the circular primitive type