Question

Most of the research into ray tracing has centered on the problem
of reducing the impact of the intersection calculations, either by
reducing ______________________, or
reducing_______________________, or both.

Answer #1

**Answer :**

Most of the research into ray tracing has centered on the
problem of reducing the impact of the intersection calculations,
either by reducing **the number of intersection calculations
by enclosing the groups of adjacent objects into a bounding
volume**, or reducing **the number of intersection
calculations by using space subdivision methods,** or
both.

**Bounding volume method :** It is one of the
simplest ray tracing technique which works by ray tracing a
boundary volume usually a box or a sphere which contains all the
vertices of the grid, it is also the tightest volume surrounding
the grid.

**Space subdivison method :** In this ray-tracing
technique,the space is partitioned in an irregular manner to
accomodate the objects as closely as possible.

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