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6.6 KiB
Level Trap Table (Class 12)
L22 is a table describing trap items and general marker.
Level Trap Entry (28 bytes)
0000 [6]byte Level object prefix
0006 [22]byte Trap data
Infrastructure 12/0/x
Critter AI Hints 12/0/7
Critter AI Hint Data (22 byte)
0000 [6]byte Unused; A few have the first byte 0x06
0006 int16 Next object index
0008 [10]byte Unused
0012 int16 Trigger object flag -- 0: off, 1: on
0014 int16 Trigger object index
AI hint marker are arranged to form a loop with their next object index fields. They describe a patrolling path for critters.
If the trigger object flag is set to 0x01, the object identified by trigger object index will be triggered approximately 1.5 seconds after a critter entered the tile this marker is in.
These patrolling paths appear to work only under special circumstances. They are rarely used in the main game and so far have been found to properly work only on level 9 for a mutated cyborg. The main reason for these hints not properly working is that roaming critters only walk when the hacker is within their vicinity - which often already makes them hostile. The cyborg on level 9 initially is docile, thus not concerned about a (passive) hacker. Its 4 state bytes are
00 00 04 00and requires the second loot object to point to the first hint. Critters take these hints as such - they first walk into their direction, and continue to walk after passing them. Without a new hint, they will wander off in random directions. The cyborg on level 9 properly walks back and forth because its linear back-and-forth path has a hint for ever tile, and the two edges of the path are in coves, within which the cyborg bumps against the walls until properly turned around.
Repulsors 12/0/10
Repulsor Data (22 byte)
0000 [10]byte Unused; A few have the first byte 0x06 without effect
000A int32 Start height
000E int32 End height
0012 int32 Repulsion flags; 0x00000001: disabled (float down); 0x00000008: strong repulsor
The start height and end height values have a unit of 0x00010000 for one tile height. An end height of zero means endless.
Both values are measured from the floor. Repulsion only happens if the hacker is within these limits.
Triggers 12/0/x (with exceptions)
The type of the trigger object determines its cause. The trap data is then that of actions.
Trigger Types:
0: Entry; Hacker enters tile (mid-air or per foot)
1: Null; Must be set off externally. Also used as data storage.
2: Floor; Hacker touches floor of this tile (per foot exclusively)
3: Player Death; Used to resurrect Hacker
4: Death Watch; When certain objects (or types of objects) are destroyed. Common for CPU nodes.
5: Area Enter; Hacker enters (or leaves) a given radius
6: Area Continuous; Hacker enters any tile inside (or outside) a given radius
7: This is not a trigger! See AI hints above.
8: Level Entry; Used for instance to initialize starting health
9: Continuous; Unused
10: This is not a trigger! See repulsors above.
11: Ecology; Certain objects go extinct
12: SHODAN; Triggered when level security changes
Conditions
Nearly all triggers have conditions based on game variables.
The following exceptions exist:
- 4 (Death Watch Trigger): A union of object type and object index conditions
- 5, 6 (Area Trigger): A radius around the trigger. See below.
- 11 (Ecology Trigger): A combination of object type and a limit value. See below.
Area Triggers
These triggers activate when the hacker enters or leaves a circular area around the trigger. The radius of this area is determined by the condition.
Area Trigger Condition (4 bytes)
0000 sint32 Radius (in tiles)
If the radius is between 1 and 4095, the trigger activates when the hacker is within a circular area of that size around the trigger's tile. A negative radius will activate the trigger when the hacker is outside of the circle instead (e.g. if the radius is -5, the trigger activates when the hacker is at least 5 tiles away from the trigger).
Trigger type 5 ("Area Enter") activates once the hacker either enters (positive radius) or leaves (negative radius) the area. Type 6 ("Area Continuous") activates when the hacker enters any tile that is either inside (positive radius) or outside (negative radius) of the area.
Ecology Triggers
These triggers watch a certain type of objects as their condition, together with a limit value. Whenever the current count of these objects is changed to a number below the limit value, the action is executed.
Ecology Trigger Condition (4 bytes)
0000 byte Type
0001 byte Subclass
0002 byte Class
0003 byte Limit
Note: The action is executed more than once. How often the action is executed is dependent on the delta. If the new object count equals to (limit-1), then the action is executed twice. If the new object count is less than that, the action is executed three times.
The layout for the C/S/T is the common one in an int32 value, with the high-byte representing the limit value.
The game watches only critters, typically to spawn new ones. The trigger also works with other classes.
Trip Beams 12/1/x
These are not used in the game.
Map Marker 12/2/x
Only two types are used in the game.
Map Notes 12/2/3
Map Note Marker Data (22 bytes)
0000 [18]byte Unused
0012 int32 Entry offset
The Entry offset points into L46 (map notes) for the text entry. When a map note is removed and the whole table is defragmented, all the entry offsets are changed accordingly.
Music Voodoo Marker 12/2/4
Music Voodoo Marker Data (22 byte)
0000 [6]byte Unused
0006 byte Music flavour
0007 [15]byte Unused
The Music flavour is an index, with a range of 0x00..0x04, referencing patches of "music" resembling industrial noise.
They have a rectangular area of effect which covers 14x14 tiles, centered on the tile of the trap.
The music is only played if the current tile has a music index of zero.
This is used extensively on maintenance level, the 4 flight decks, as well as for the maintenance tunnels on the groves.