Re:John Carmack's Comment on Hardware Ray Tracing
by krosaen on Thursday January 24, 2013 @11:25AM
(#5110319)
Within his comment is a great example / reminder to consider constant factors when doing your 'big-oh' analysis of different approaches to a problem.
"""
Because ray tracing involves a log2 scale of the number of primitives, while rasterization is linear, it appears that highly complex scenes will render faster with ray tracing, but it turns out that the constant factors are so different that no dataset that fits in memory actually crosses the time order threshold.
"""
""" Because ray tracing involves a log2 scale of the number of primitives, while rasterization is linear, it appears that highly complex scenes will render faster with ray tracing, but it turns out that the constant factors are so different that no dataset that fits in memory actually crosses the time order threshold. """