April 2016
Intermediate to advanced
784 pages
18h 25m
English
Content preview from Ray Tracing from the Ground Up
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Chapter 7
Mapping Samples to a Hemisphere
Objectives
By the end of this chapter you should:
- understand how to map sample points from a square to a hemisphere with a cosine power density distribution;
- have the sampling tools available to model a number of direct and indirect illumination effects.
A number of shading applications in later chapters require sample points distributed over the surface of a unit hemisphere. These samples need to have a density that varies as a cosine power of the polar angle measured from the top of the hemisphere. The reason is a cosine factor in the rendering equation (Chapter 13) and because some of the BRDFs ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.