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Function6ec1 → CanObjectMoveInDirection

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This commit is contained in:
Rangi 2018-05-24 12:36:35 -04:00
parent a91aa18dae
commit 3927bcdb9d
3 changed files with 6 additions and 6 deletions
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6
docs/bugs_and_glitches.md
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@ -44,7 +44,7 @@ These are known bugs and glitches in the original Pokémon Crystal game: code th
- [Two tiles in the `port` tileset are drawn incorrectly](#two-tiles-in-the-port-tileset-are-drawn-incorrectly)
- [`LoadMetatiles` wraps around past 128 blocks](#loadmetatiles-wraps-around-past-128-blocks)
- [Surfing directly across a map connection does not load the new map](#surfing-directly-across-a-map-connection-does-not-load-the-new-map)
- [`Function6ec1` does not correctly limit object movement](#function6ec1-does-not-correctly-limit-object-movement)
- [Swimming NPCs aren't limited by their movement radius](#swimming-npcs-arent-limited-by-their-movement-radius)
- [`CheckOwnMon` only checks the first five letters of OT names](#checkownmon-only-checks-the-first-five-letters-of-ot-names)
- [Catching a Transformed Pokémon always catches a Ditto](#catching-a-transformed-pokémon-always-catches-a-ditto)
- [Using a Park Ball in normal battles has a corrupt animation](#using-a-park-ball-in-normal-battles-has-a-corrupt-animation)
@ -1185,11 +1185,11 @@ In [home/map.asm](/home/map.asm):
*To do:* Identify specific code causing this bug and fix it.
## `Function6ec1` does not correctly limit object movement
## Swimming NPCs aren't limited by their movement radius
This bug is why the Lapras in [maps/UnionCaveB2F.asm](/maps/UnionCaveB2F.asm), which uses `SPRITEMOVEDATA_SWIM_WANDER`, is not restricted by its `1, 1` movement radius.
In [engine/overworld/npc_movement.asm](/engine/overworld/npc_movement.asm):
This is a bug with `CanObjectMoveInDirection` in [engine/overworld/npc_movement.asm](/engine/overworld/npc_movement.asm):
```asm
ld hl, OBJECT_FLAGS1

4
engine/overworld/map_objects.asm
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@ -696,7 +696,7 @@ MapObjectMovementPattern: ; 47dd
and %00000011
or 0
call InitStep
call Function6ec1
call CanObjectMoveInDirection
jr c, .ok2
ld de, SFX_STRENGTH
call PlaySFX
@ -1049,7 +1049,7 @@ MapObjectMovementPattern: ; 47dd
.RandomWalkContinue:
call InitStep
call Function6ec1 ; check whether the object can move in that direction
call CanObjectMoveInDirection ; check whether the object can move in that direction
jr c, .NewDuration
call UpdateTallGrassFlags
ld hl, OBJECT_ACTION

2
engine/overworld/npc_movement.asm
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@ -1,4 +1,4 @@
Function6ec1: ; 6ec1
CanObjectMoveInDirection: ; 6ec1
ld hl, OBJECT_PALETTE
add hl, bc