Minor fix
Minor fix
Refactoring
Refactoring
Small optimization
Minor optimization
Minor fix
Draft version of Surface Area Heuristic for boosting kd-tree performance
Refactoring + comments
Link to topic on Stackoverflow about SAH
Merge pull request #12 from lagodiuk/boost_kd_tree_SAH

Boost kd-tree by using Surface Area Heuristic
Merge branch 'yura'
Very small optimization - taking int account fog density to reduce number of recursive rays
Minor refactoring
Added sphere
Merge branch 'yura'