Misc/abrash-black-book
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Convert figure images to markdown

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James Gregory 2013-12-31 07:56:10 +11:00
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54-03.md
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@ -90,11 +90,9 @@ have that, we can easily calculate the red diffuse shading from a
directed light source as min(ID~red~xR~red~x(L'• N), 1) and likewise for
the green and blue color components.
![](images/54-01.jpg)\
**Figure 54.1**  *Illumination by a directed light source*
![**Figure 54.1**  *Illumination by a directed light source*](images/54-01.jpg)
![](images/54-02.jpg)\
**Figure 54.2**  *The dot product of two vectors.*
![**Figure 54.2**  *The dot product of two vectors.*](images/54-02.jpg)
The overall red shading for each polygon can be calculated by summing
the ambient-shading red component with the diffuse-shading component