- Use the pre-calculated center/extreme xyz fields for the aabb
- use modelToCanvas and reduce indirection
- Use a specialized union that only does axis-aligned rectangles
instead of the Area class
- Use a specialized intersection that only does convex polygons, again
to avoid Area
To draw the progress bar, XPGlobesOverlay.drawTooltipIfMouseover() uses
Experience.getXPForLevel(), which threw an IllegalArgumentException when
asked about level 1. This change shifts the XP_FOR_LEVEL array over by
one, so that XP_FOR_LEVEL[0] is the XP required to reach level 1 (i.e. 0),
rather than the XP required for level 2.
