ref: d96f914315c6ab82d30facbc4a5be1710f3c4a33
dir: /engine/overworld/map_object_action.asm/
ObjectActionPairPointers: ; entries correspond to OBJECT_ACTION_* constants dw SetFacingStanding, SetFacingStanding dw SetFacingStandAction, SetFacingCurrent dw SetFacingStepAction, SetFacingCurrent dw SetFacingBumpAction, SetFacingCurrent dw SetFacingCounterclockwiseSpin, SetFacingCurrent dw SetFacingCounterclockwiseSpin2, SetFacingStanding dw SetFacingFish, SetFacingFish dw SetFacingShadow, SetFacingStanding dw SetFacingEmote, SetFacingEmote dw SetFacingBigDollSym, SetFacingBigDollSym dw SetFacingBounce, SetFacingFreezeBounce dw SetFacingWeirdTree, SetFacingCurrent dw SetFacingBigDollAsym, SetFacingBigDollAsym dw SetFacingBigDoll, SetFacingBigDoll dw SetFacingBoulderDust, SetFacingStanding dw SetFacingGrassShake, SetFacingStanding dw SetFacingSkyfall, SetFacingCurrent SetFacingStanding: ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], STANDING ret SetFacingCurrent: call GetSpriteDirection or FACING_STEP_DOWN_0 ; useless ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingStandAction: ld hl, OBJECT_FACING_STEP add hl, bc ld a, [hl] and 1 jr nz, SetFacingStepAction jp SetFacingCurrent SetFacingStepAction: ld hl, OBJECT_FLAGS1 add hl, bc bit SLIDING_F, [hl] jp nz, SetFacingCurrent ld hl, OBJECT_STEP_FRAME add hl, bc ld a, [hl] inc a and %00001111 ld [hl], a rrca rrca maskbits NUM_DIRECTIONS ld d, a call GetSpriteDirection or FACING_STEP_DOWN_0 ; useless or d ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingSkyfall: ld hl, OBJECT_FLAGS1 add hl, bc bit SLIDING_F, [hl] jp nz, SetFacingCurrent ld hl, OBJECT_STEP_FRAME add hl, bc ld a, [hl] add 2 and %00001111 ld [hl], a rrca rrca maskbits NUM_DIRECTIONS ld d, a call GetSpriteDirection or FACING_STEP_DOWN_0 ; useless or d ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingBumpAction: ld hl, OBJECT_FLAGS1 add hl, bc bit SLIDING_F, [hl] jp nz, SetFacingCurrent ld hl, OBJECT_STEP_FRAME add hl, bc inc [hl] ld a, [hl] rrca rrca rrca maskbits NUM_DIRECTIONS ld d, a call GetSpriteDirection or FACING_STEP_DOWN_0 ; useless or d ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingCounterclockwiseSpin: call CounterclockwiseSpinAction ld hl, OBJECT_FACING add hl, bc ld a, [hl] or FACING_STEP_DOWN_0 ; useless ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingCounterclockwiseSpin2: call CounterclockwiseSpinAction jp SetFacingStanding CounterclockwiseSpinAction: ; Here, OBJECT_STEP_FRAME consists of two 2-bit components, ; using only bits 0,1 and 4,5. ; bits 0,1 is a timer (4 overworld frames) ; bits 4,5 determines the facing - the direction is counterclockwise. ld hl, OBJECT_STEP_FRAME add hl, bc ld a, [hl] and %11110000 ld e, a ld a, [hl] inc a and %00001111 ld d, a cp 4 jr c, .ok ld d, 0 ld a, e add $10 and %00110000 ld e, a .ok ld a, d or e ld [hl], a swap e ld d, 0 ld hl, .Directions add hl, de ld a, [hl] ld hl, OBJECT_FACING add hl, bc ld [hl], a ret .Directions: db OW_DOWN, OW_RIGHT, OW_UP, OW_LEFT SetFacingFish: call GetSpriteDirection rrca rrca add FACING_FISH_DOWN ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingShadow: ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], FACING_SHADOW ret SetFacingEmote: ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], FACING_EMOTE ret SetFacingBigDollSym: ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], FACING_BIG_DOLL_SYM ret SetFacingBounce: ld hl, OBJECT_STEP_FRAME add hl, bc ld a, [hl] inc a and %00001111 ld [hl], a and %00001000 jr z, SetFacingFreezeBounce ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], FACING_STEP_UP_0 ret SetFacingFreezeBounce: ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], FACING_STEP_DOWN_0 ret SetFacingWeirdTree: ld hl, OBJECT_STEP_FRAME add hl, bc ld a, [hl] inc a ld [hl], a maskbits NUM_DIRECTIONS, 2 rrca rrca add FACING_WEIRD_TREE_0 ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], a ret SetFacingBigDollAsym: ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], FACING_BIG_DOLL_ASYM ret SetFacingBigDoll: ld a, [wVariableSprites + SPRITE_BIG_DOLL - SPRITE_VARS] ld d, FACING_BIG_DOLL_SYM ; symmetric cp SPRITE_BIG_SNORLAX jr z, .ok cp SPRITE_BIG_LAPRAS jr z, .ok ld d, FACING_BIG_DOLL_ASYM ; asymmetric .ok ld hl, OBJECT_FACING_STEP add hl, bc ld [hl], d ret SetFacingBoulderDust: ld hl, OBJECT_STEP_FRAME add hl, bc inc [hl] ld a, [hl] ld hl, OBJECT_FACING_STEP add hl, bc and 2 ld a, FACING_BOULDER_DUST_1 jr z, .ok inc a ; FACING_BOULDER_DUST_2 .ok ld [hl], a ret SetFacingGrassShake: ld hl, OBJECT_STEP_FRAME add hl, bc inc [hl] ld a, [hl] ld hl, OBJECT_FACING_STEP add hl, bc and 4 ld a, FACING_GRASS_1 jr z, .ok inc a ; FACING_GRASS_2 .ok ld [hl], a ret