Nightshade: Data at D0A0

Indexed by SORT_AND_DRAW_THINGS's comparison of the candidate with another thing: the U outcome (0 the candidate wholly at larger U, 1 overlapping, 2 wholly at smaller U), plus three times the V outcome (0 the candidate at larger V, 1 overlapping, 2 at smaller V), plus 9 with the town turned round. In the usual view smaller U and larger V are further back; turned round, larger U and smaller V. DEPTH_KEEP keeps the candidate, DEPTH_SWAP makes the other thing the candidate, and DEPTH_BY_CORNERS settles boxes that overlap on both axes. Where each box is further back along one axis and nearer along the other (0, 8, 9 and 17), the order does not matter, and the candidate stays.

Indexed by SORT_AND_DRAW_THINGS's comparison of the candidate with another thing: the U outcome (0 the candidate wholly at larger U, 1 overlapping, 2 wholly at smaller U), plus three times the V outcome (0 the candidate at larger V, 1 overlapping, 2 at smaller V), plus 9 with the town turned round. In the usual view smaller U and larger V are further back; turned round, larger U and smaller V. DEPTH_KEEP keeps the candidate, DEPTH_SWAP makes the other thing the candidate, and DEPTH_BY_CORNERS settles boxes that overlap on both axes. Where each box is further back along one axis and nearer along the other (0, 8, 9 and 17), the order does not matter, and the candidate stays.
DEPTH_TABLE	D0A0	DEFW DEPTH_KEEP	0: the candidate at larger U and larger V -- no order: it stays
	D0A2	DEFW DEPTH_KEEP	1: the same U, the candidate at larger V, so further back: it stays
	D0A4	DEFW DEPTH_KEEP	2: the candidate at smaller U and larger V, further back on both: it stays
	D0A6	DEFW DEPTH_SWAP	3: the candidate at larger U, the same V: the other is further back
	D0A8	DEFW DEPTH_BY_CORNERS	4: overlapping on both axes: by their nearest corners
	D0AA	DEFW DEPTH_KEEP	5: the candidate at smaller U, the same V: it stays
	D0AC	DEFW DEPTH_SWAP	6: the candidate at larger U and smaller V: the other is further back on both
	D0AE	DEFW DEPTH_SWAP	7: the same U, the candidate at smaller V: the other is further back
	D0B0	DEFW DEPTH_KEEP	8: the candidate at smaller U and smaller V -- no order: it stays
	D0B2	DEFW DEPTH_KEEP	9: turned round, the candidate at larger U and larger V -- no order: it stays
	D0B4	DEFW DEPTH_SWAP	10: turned round, the same U, the candidate at larger V: the other is further back
	D0B6	DEFW DEPTH_SWAP	11: turned round, the candidate at smaller U and larger V: the other is further back on both
	D0B8	DEFW DEPTH_KEEP	12: turned round, the candidate at larger U, the same V: it stays
	D0BA	DEFW DEPTH_BY_CORNERS	13: turned round, overlapping on both axes: by their nearest corners
	D0BC	DEFW DEPTH_SWAP	14: turned round, the candidate at smaller U, the same V: the other is further back
	D0BE	DEFW DEPTH_KEEP	15: turned round, the candidate at larger U and smaller V, further back on both: it stays
	D0C0	DEFW DEPTH_KEEP	16: turned round, the same U, the candidate at smaller V: it stays
	D0C2	DEFW DEPTH_KEEP	17: turned round, the candidate at smaller U and smaller V -- no order: it stays