A little snip here, a little snip there

In order to pave the way for the next phase, I have done some trimming of the data structures used within the X-Reyes.

The chief culprit was the use of the svg:metadata element to store additional data (metadata if you like) about the primitives. I had used an:

<xr:bbox top="0" right="16" bottom="16" left="0"/>

element to store the bounding box of each primitive (and micropolygon). This, as I'm sure you can imagine is rather verbose. So I have done away with the svg:metadata element and now use an:

xr:bbox="0 16 16 0"

attribute instead. This has reduced the memory required to process an image by a third.

Sweet!