May 2014
Intermediate to advanced
306 pages
8h 8m
English
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Creating surfaces – depth, non-smooth, natural, and realistic with normal maps
Few things in life are smooth and reflect light predictably, such as plastic—a modern invention—and a glass-smooth lake. We know how to render such smooth meshes based on the angle between the light source at that pixel and the normal using the dot product. The dot product is calculated by multiplying the two normalized vectors (each having a length of 1 unit), Nx * Lx + Ny * Ly + Nz * Lz, where N is the vertex normal (Nx, Ny, Nz) and L is the light direction (Lx, Ly, Lz).
However, most objects in nature have a bumpy, irregular surface, for example, oranges, tree bark, or a choppy lake. Man-made objects also have rough surfaces, for example, fabric or brick walls. Early ...
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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.