Viewer draw better performance

Слиты nikitronn запросил слияние github/fork/vicdoval/viewer_draw_better_performance в master

Created by: vicdoval

Performance fixes for the viewer draw One Icosphere with 8 subdivisions before 0.851 s now 0.251 s One Icosphere with 8 subdivisions and 5 matrices before 4.517 s now 3.720 s

  • Ready for merge.