Graphics Programming with DirectX 9

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Module III. Workshop I: Lightmapping and Radiosity. by. Gary Simmons/Adam Hoult. (Lesson Plan). Graphics Programming with DirectX 9 …

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Content
Module
III Workshop
I: Lightmapping and Radiosity
by
Gary Simmons/Adam Hoult
(Lesson Plan)
Graphics Programming with DirectX 9Lesson 1: GeometryBased
Lighting
Textbook: Chapter 18 (pgs. 1276)
In this lesson students will review the use of precompiled
lighting in games and implement the first of three lighting
compiler tools that we will be building over the next three lessons (a fourth compiler will follow in Workshop II after
pixel shaders have been introduced). Precompiled
lighting remains a vital technique in commercial titles for
illumination of static environments. Our first compiler will generate lighting at the vertex level for later use in the
runtime component. This will be a command line tool that can be spawned by the GILES. 2.0 process pipeline, thus
allowing us to integrate our illumination model into the art development pipeline.
Our vertex lighting compiler will use the BlinnPhong
illumination model to record vertex colours, much like the
Direct3D fixedfunction
lighting pipeline does. Because we are calculating the vertex colours offline, will also be able
to factor static geometry occlusion into the end result. The input to the compiler will be an unlit level that contains one
or more standard and/or emulated area light sources. The output will be a scene that exhibits smooth shadowing and
filtered lighting and will be…