Alien 8: Data at C833

27 routine addresses, indexed by the Z code (0 the candidate above, 1 overlapping, 2 IY above) + the V code (0 the candidate further back, 3 overlapping, 6 IY further back) + the U code (0 IY further back, 9 overlapping, 18 the candidate further back), as SORT_AND_DRAW works them out. "Further back" is smaller U, larger V, lower Z. The table is Knight Lore's and Pentagram's, entry for entry.

Four outcomes. IY_GOES_FIRST when IY is behind or level with the candidate on all three axes and strictly behind on at least one: IY must be drawn first. CANDIDATE_ALREADY_FIRST for the mirror image, where the candidate is behind IY and is being drawn first anyway. ORDER_UNCONSTRAINED where each is in front of the other on some axis, which says nothing about their order. BOXES_INTERSECT, index 13, for boxes that overlap on every axis.

27 routine addresses, indexed by the Z code (0 the candidate above, 1 overlapping, 2 IY above) + the V code (0 the candidate further back, 3 overlapping, 6 IY further back) + the U code (0 IY further back, 9 overlapping, 18 the candidate further back), as SORT_AND_DRAW works them out. "Further back" is smaller U, larger V, lower Z. The table is Knight Lore's and Pentagram's, entry for entry. Four outcomes. IY_GOES_FIRST when IY is behind or level with the candidate on all three axes and strictly behind on at least one: IY must be drawn first. CANDIDATE_ALREADY_FIRST for the mirror image, where the candidate is behind IY and is being drawn first anyway. ORDER_UNCONSTRAINED where each is in front of the other on some axis, which says nothing about their order. BOXES_INTERSECT, index 13, for boxes that overlap on every axis.
DEPTH_ORDER	C833	DEFW ORDER_UNCONSTRAINED	0 (Z0 V0 U0): no constraint; 1 (Z1 V0 U0): no constraint; 2 (Z2 V0 U0): no constraint; 3 (Z0 V3 U0): IY first
	C835	DEFW ORDER_UNCONSTRAINED
	C837	DEFW ORDER_UNCONSTRAINED
	C839	DEFW IY_GOES_FIRST
	C83B	DEFW IY_GOES_FIRST	4 (Z1 V3 U0): IY first; 5 (Z2 V3 U0): no constraint; 6 (Z0 V6 U0): IY first; 7 (Z1 V6 U0): IY first
	C83D	DEFW ORDER_UNCONSTRAINED
	C83F	DEFW IY_GOES_FIRST
	C841	DEFW IY_GOES_FIRST
	C843	DEFW ORDER_UNCONSTRAINED	8 (Z2 V6 U0): no constraint; 9 (Z0 V0 U9): no constraint; 10 (Z1 V0 U9): candidate first; 11 (Z2 V0 U9): candidate first
	C845	DEFW ORDER_UNCONSTRAINED
	C847	DEFW CANDIDATE_ALREADY_FIRST
	C849	DEFW CANDIDATE_ALREADY_FIRST
	C84B	DEFW IY_GOES_FIRST	12 (Z0 V3 U9): IY first; 13 (Z1 V3 U9): the boxes intersect; 14 (Z2 V3 U9): candidate first; 15 (Z0 V6 U9): IY first
	C84D	DEFW BOXES_INTERSECT
	C84F	DEFW CANDIDATE_ALREADY_FIRST
	C851	DEFW IY_GOES_FIRST
	C853	DEFW IY_GOES_FIRST	16 (Z1 V6 U9): IY first; 17 (Z2 V6 U9): no constraint; 18 (Z0 V0 U18): no constraint; 19 (Z1 V0 U18): candidate first
	C855	DEFW ORDER_UNCONSTRAINED
	C857	DEFW ORDER_UNCONSTRAINED
	C859	DEFW CANDIDATE_ALREADY_FIRST
	C85B	DEFW CANDIDATE_ALREADY_FIRST	20 (Z2 V0 U18): candidate first; 21 (Z0 V3 U18): no constraint; 22 (Z1 V3 U18): candidate first; 23 (Z2 V3 U18): candidate first
	C85D	DEFW ORDER_UNCONSTRAINED
	C85F	DEFW CANDIDATE_ALREADY_FIRST
	C861	DEFW CANDIDATE_ALREADY_FIRST
	C863	DEFW ORDER_UNCONSTRAINED	24 (Z0 V6 U18): no constraint; 25 (Z1 V6 U18): no constraint; 26 (Z2 V6 U18): no constraint
	C865	DEFW ORDER_UNCONSTRAINED
	C867	DEFW ORDER_UNCONSTRAINED