Enumeration BvhSplitStrategy

AVERAGE: Split at arithmetic mean of centers.

• Fast: O(n) iteration to compute mean
• Can create unbalanced splits on skewed distributions

CENTER: Split at midpoint of center bounds.

• Fast: O(n) with simple min/max computation
• Good balance for most geometries

SAH: Surface Area Heuristic with binning.

• Slow: O(n) with high constant factor (binning + cost evaluation)
• Best quality: optimal expected query cost
• Use for static meshes queried many times