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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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@ -52,9 +52,8 @@ polygons, and that cuts the work involved in sorting, clipping, and
rasterizing edges nearly in half, while also shrinking the world
database quite a bit due to the sharing.
![](images/66-03.jpg)\
**Figure 66.3**  *Activating a polygon when a leading edge is
encountered in the AEL.*
![**Figure 66.3**  *Activating a polygon when a leading edge is
encountered in the AEL.*](images/66-03.jpg)
One final advantage of edge-sorting is that it makes no distinction
between convex and concave polygons. That's not an important
@ -65,9 +64,8 @@ down, and concave polygons help a lot in that regard. While it's
possible to handle concave polygons with span-sorting, that can involve
significant performance penalties.
![](images/66-04.jpg)\
**Figure 66.4**  *Deactivating a polygon when a trailing edge is
encountered in the AEL.*
![**Figure 66.4**  *Deactivating a polygon when a trailing edge is
encountered in the AEL.*](images/66-04.jpg)
Nonetheless, there's no cut-and-dried answer as to which approach is
better. In the end, span-sorting and edge-sorting amount to the same