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Convert figure images to markdown

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James Gregory 2013-12-31 07:56:10 +11:00
commit 77a95ec319
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@ -30,11 +30,9 @@ end-points has to be transformed, along with the rest of the vertices,
and that takes time. Still, it's faster than calculating a unit normal
for each polygon from scratch.
![](images/54-03.jpg)\
**Figure 54.3**  *The unit normal in the polygon data structure.*
![**Figure 54.3**  *The unit normal in the polygon data structure.*](images/54-03.jpg)
![](images/54-04.jpg)\
**Figure 54.4**  *The reversed light source vector.*
![**Figure 54.4**  *The reversed light source vector.*](images/54-04.jpg)
We also need a unit vector for each directed light source. The directed
light sources I've implemented in X-Sharp are spotlights; that is,