Graphics Multimedia

Digital Modeling of Material Appearance by Julie Dorsey

By Julie Dorsey

Content material:

, Page ix
1 - Introduction

, Pages 1-4
2 - Background

, Pages 5-26
3 - commentary and classification

, Pages 27-46
4 - Mathematical terms

, Pages 47-60
5 - basic fabric models

, Pages 61-121
6 - really expert fabric models

, Pages 123-159
7 - Measurement

, Pages 161-191
8 - getting older and weathering

, Pages 193-225
9 - Specifying and encoding visual appeal descriptions

, Pages 227-242
10 - Rendering appearance

, Pages 243-275

, Pages 277-302

, Pages 303-317

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Extra info for Digital Modeling of Material Appearance

Sample text

Most metals have a high tendency to absorb electromagnetic energy, so transmission of visible light is not observed. For dielectrics, a change in the speed of light in the material causes a change in the direction. 42 for diamond. 3.

The light reflected by the surface in each direction can be described by the radiance in each direction. 6. 1 DISTRIBUTION FUNCTIONS The BRDF is a distribution function, not a reflectance. It describes how the radiance is distributed in different directions, rather than expressing the fraction of energy reflected. For a general surface, some finite amount of incident energy from direction Θi is redirected into the hemisphere of all directions about the surface. If we look at any one reflected direction we are considering only an infinitesimally small solid angle dωr .


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