Dynamic BVH

[yockey88]

Scene System (#21)

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Features:

• use existing BVH/Octree implementation and update it to update dynamically
• must be done in a way as to not effect framerate
  • tree building optimizations needed (morton codes?)
  • be able to know if it can skip an updating if no entities have moved
• investigate moving this to the GPU??

Stretch Goal:

• eliminate recursion and use a stack based algorithm to avoid possible stack explosions and simplify thinking about the code, probably not that difficult to do, but would take some thinking about to make the conversion

[yockey88]

current implementation updates dynamically, and only rebuilds if a certain condition is met (based on uncle node surface areas)