renamed variable and used more precise pi/2
Merge branch 'master' of https://github.com/x3dom/apps-modeling
Merge branch 'master' of https://github.com/x3dom/apps-modeling
Merge branch 'master' of https://github.com/x3dom/apps-modeling
Merge branch 'master' of https://github.com/x3dom/apps-modeling
Merge branch 'master' of https://github.com/x3dom/apps-modeling
little cleanup
Merge branch 'master' of https://github.com/x3dom/apps-modeling