Pentagram: Templates: what a room can place

The 31 kinds of thing a room record can place -- the templates the builder (BUILD_ROOM) makes object records from, after the scenery. A room gives a group header, bits 3-7 a template number (an index into OBJECT_TABLE) and bits 0-2 how many copies less one, then a position byte for each copy: U = 72 + 16 times bits 0-2, V = 72 + 16 times bits 3-5, and Z the floor plus 12 times bits 6-7, so a room is an 8 by 8 grid of cells, four levels high.

A template is a list of 5-byte parts ended by a zero: the graphic, the half-sizes in U and V, the height (Z is an object's base, not its middle) and the flags, which go to +0 and +4 to +7 of a record, the position to +1 to +3 and the room to +8. The builder would make a record of each part at the same place, but every template in the game has just one. The graphic decides everything else: its update routine and its sprite (see every graphic). The flags set here are bit 4, to be drawn; bit 2, pushable, which the collision code reads when something walks into it (ADJ_DU_FOR_OBJ_INTERSECT); and bit 6, mirrored.

A template number of 31 is not a template: it moves the builder on to a second page of templates, 64 bytes further on, and skips a byte; no room uses it. Templates 9 and 22 share one set of bytes.

Each is drawn here by the game, on its own near the middle of an empty room (cell 3, 3, on the floor), from a one-off room record the game builds and draws its first turn of, in SkoolKit's simulator; a thing that moves has had one turn. Knight Lore's templates are the same idea with a sixth byte, an offset, and several parts to some (see Knight Lore's templates).

0: A stone block -- OBJECT0

Graphic	Half U, V; height	Flags	Update routine
11	8, 8, 12	$10 (to be drawn)	JUMP_L16_D8

114 copies in 30 rooms: 0, 2, 4, 16, 27, 31, 37, 38, 41, 42, 54, 55, 56, 59, 62, 69, 72, 73, 74, 80, 86, 87, 94, 108, 129, 141, 142, 145, 146, 147.

1: A tree stump -- OBJECT1

Graphic	Half U, V; height	Flags	Update routine
10	8, 8, 12	$10 (to be drawn)	JUMP_L16_D8

68 copies in 15 rooms: 5, 11, 18, 26, 44, 46, 70, 73, 74, 99, 112, 117, 120, 123, 130.

2: A ghost -- OBJECT2

Graphic	Half U, V; height	Flags	Update routine
48	5, 5, 5	$10 (to be drawn)	HOMER

No room places it.

3: A bed of spikes -- OBJECT3

Graphic	Half U, V; height	Flags	Update routine
23	7, 7, 10	$10 (to be drawn)	STILL_DEADLY

270 copies in 35 rooms: 0, 7, 12, 13, 15, 16, 18, 31, 34, 37, 38, 41, 44, 47, 51, 53, 54, 55, 56, 59, 67, 71, 80, 83, 87, 92, 93, 94, 96, 100, 108, 141, 146, 147, 149.

4: A tree stump -- OBJECT4

Graphic	Half U, V; height	Flags	Update routine
72	8, 8, 12	$14 (pushable, to be drawn)	PUSHABLE

53 copies in 17 rooms: 3, 5, 9, 11, 13, 18, 22, 29, 70, 71, 73, 74, 107, 120, 126, 130, 133.

5: A toothed trap -- OBJECT5

Graphic	Half U, V; height	Flags	Update routine
30	7, 7, 10	$10 (to be drawn)	STILL_DEADLY

179 copies in 28 rooms: 1, 2, 4, 5, 20, 21, 27, 28, 29, 36, 46, 52, 61, 62, 64, 69, 70, 74, 84, 86, 101, 107, 108, 109, 117, 120, 126, 130.

6: A smooth block -- OBJECT6

Graphic	Half U, V; height	Flags	Update routine
63	8, 8, 12	$14 (pushable, to be drawn)	PUSHABLE

8 copies in 2 rooms: 24, 98.

7: A table -- OBJECT7

Graphic	Half U, V; height	Flags	Update routine
73	8, 14, 12	$14 (pushable, to be drawn)	SLIDING_TABLE, in HEAVY_BLOCK

4 copies in 4 rooms: 16, 19, 41, 73.

8: A tree stump -- OBJECT8

Graphic	Half U, V; height	Flags	Update routine
76	8, 8, 12	$10 (to be drawn)	JUMP_L16_D8

16 copies in 2 rooms: 2, 86.

9: A stone block -- OBJECT9

Graphic	Half U, V; height	Flags	Update routine
91	8, 8, 12	$10 (to be drawn)	HEAVY_BLOCK

The same bytes as template 22.

5 copies in 3 rooms: 91, 142, 146.

10: A stone block -- OBJECT10

Graphic	Half U, V; height	Flags	Update routine
78	8, 8, 12	$10 (to be drawn)	SINKING_BLOCK

6 copies in 6 rooms: 15, 80, 86, 123, 146, 149.

11: A stone block -- OBJECT11

Graphic	Half U, V; height	Flags	Update routine
79	8, 8, 12	$14 (pushable, to be drawn)	PUSHABLE

6 copies in 4 rooms: 42, 55, 56, 69.

12: A stone block -- OBJECT12

Graphic	Half U, V; height	Flags	Update routine
84	8, 8, 12	$10 (to be drawn)	LIFT

7 copies in 7 rooms: 2, 19, 54, 87, 94, 147, 149.

13: A dark patch on the ground -- OBJECT13

Graphic	Half U, V; height	Flags	Update routine
74	12, 12, 1	$10 (to be drawn)	STILL_DEADLY

24 copies in 4 rooms: 78, 112, 123, 134.

14: A bed of spikes -- OBJECT14

Graphic	Half U, V; height	Flags	Update routine
28	7, 7, 11	$14 (pushable, to be drawn)	SPIKES

21 copies in 7 rooms: 8, 14, 19, 41, 76, 103, 111.

15: A horned head -- OBJECT15

Graphic	Half U, V; height	Flags	Update routine
86	8, 8, 12	$10 (to be drawn)	DEADLY_BOBBER

11 copies in 8 rooms: 11, 27, 42, 55, 62, 88, 107, 108.

16: A stone block -- OBJECT16

Graphic	Half U, V; height	Flags	Update routine
87	8, 8, 12	$10 (to be drawn)	PACER_U, in DEADLY_PACER_U

12 copies in 12 rooms: 2, 4, 15, 27, 38, 46, 56, 59, 69, 93, 101, 129.

17: A stone block -- OBJECT17

Graphic	Half U, V; height	Flags	Update routine
88	8, 8, 12	$10 (to be drawn)	PACER_V, in DEADLY_PACER_V

5 copies in 5 rooms: 0, 2, 46, 59, 94.

18: A spider -- OBJECT18

Graphic	Half U, V; height	Flags	Update routine
89	8, 8, 10	$10 (to be drawn)	SPIDER

18 copies in 16 rooms: 3, 9, 13, 14, 15, 24, 26, 53, 69, 98, 106, 109, 111, 133, 142, 145.

19: The well -- OBJECT19

Graphic	Half U, V; height	Flags	Update routine
120	10, 10, 12	$10 (to be drawn)	WELL

3 copies in 3 rooms: 29, 71, 123.

20: A spider -- OBJECT20

Graphic	Half U, V; height	Flags	Update routine
16	8, 8, 10	$10 (to be drawn)	ROAMER

8 copies in 8 rooms: 20, 52, 76, 96, 106, 117, 125, 131.

21: A hand reaching out of a dark patch -- OBJECT21

Graphic	Half U, V; height	Flags	Update routine
75	12, 12, 1	$10 (to be drawn)	STILL_DEADLY

56 copies in 11 rooms: 63, 77, 78, 99, 103, 112, 123, 125, 129, 131, 134.

22: A stone block -- OBJECT9

Graphic	Half U, V; height	Flags	Update routine
91	8, 8, 12	$10 (to be drawn)	HEAVY_BLOCK

The same bytes as template 9.

No room places it.

23: A smooth block -- OBJECT23

Graphic	Half U, V; height	Flags	Update routine
82	8, 8, 12	$10 (to be drawn)	JUMP_L16_D8

9 copies in 2 rooms: 0, 15.

24: A stone block -- OBJECT24

Graphic	Half U, V; height	Flags	Update routine
136	8, 8, 12	$10 (to be drawn)	CRUMBLING_BLOCK

50 copies in 18 rooms: 4, 15, 16, 27, 47, 54, 55, 62, 64, 69, 80, 87, 93, 94, 141, 142, 146, 149.

25: A stone block -- OBJECT25

Graphic	Half U, V; height	Flags	Update routine
140	8, 8, 12	$10 (to be drawn)	CONVEYOR_PLUS_U

4 copies in 2 rooms: 37, 129.

26: A stone block -- OBJECT26

Graphic	Half U, V; height	Flags	Update routine
141	8, 8, 12	$10 (to be drawn)	CONVEYOR_MINUS_U

No room places it.

27: A stone block -- OBJECT27

Graphic	Half U, V; height	Flags	Update routine
142	8, 8, 12	$10 (to be drawn)	CONVEYOR_PLUS_V

8 copies in 3 rooms: 37, 67, 108.

28: A stone block -- OBJECT28

Graphic	Half U, V; height	Flags	Update routine
143	8, 8, 12	$10 (to be drawn)	CONVEYOR_MINUS_V

1 copy in 1 room: 108.

29: A horned head -- OBJECT29

Graphic	Half U, V; height	Flags	Update routine
92	8, 8, 12	$10 (to be drawn)	DEADLY_PACER_U

7 copies in 7 rooms: 29, 34, 47, 83, 99, 120, 130.

30: A horned head -- OBJECT30

Graphic	Half U, V; height	Flags	Update routine
93	8, 8, 12	$50 (to be drawn, mirrored)	DEADLY_PACER_V

7 copies in 5 rooms: 6, 29, 49, 129, 147.