Brace yourself for a fun challenge: build a photorealistic 3D
renderer from scratch! It's easier than you think. In just a couple
of weeks, build a ray-tracer that renders beautiful scenes with
shadows, reflections, brilliant refraction effects, and subjects
composed of various graphics primitives: spheres, cubes, cylinders,
triangles, and more. With each chapter, implement another piece of
the puzzle and move the renderer that much further forward. Do all
of this in whichever language and environment you prefer, and do it
entirely test-first, so you know it's correct. Recharge yourself
with this project's immense potential for personal exploration,
experimentation, and discovery. The renderer is a ray tracer, which
means it simulates the physics of light by tracing the path of
light rays around your scene. Each exciting chapter presents a
bite-sized piece of the puzzle, building on earlier chapters and
setting the stage for later ones. Requirements are given in plain
English, which you translate into tests and code. When the project
is complete, look back and realize you've built an entire system
test-first! There's no research necessary -- all the necessary
formulas and algorithms are presented and illustrated right here.
Dive into intriguing topics from fundamental concepts such as
vectors and matrices; to the algorithms that simulate the
intersection of light rays with spheres, planes, cubes, cylinders,
and triangles; to geometric patterns such as checkers and rings.
Lighting and shading effects, such as shadows and reflections, make
your scenes come to life, and constructive solid geometry (CSG)
enables you to combine your graphics primitives in simple ways to
produce complex shapes. Play and experiment as you discover the fun
of writing a ray tracer. Accept the challenge today! What You Need:
Aside from a computer, operating system, and programming
environment, you'll need a way to display PPM image files. On
Windows, programs like Photoshop will work, or free programs like
IrfanView. On Mac, no special software is needed, as Preview can
open PPM files
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