Difference between revisions of "Raven"

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Raven (Crow?)
+
{{subpage|Sprites}}
 +
 
 +
Sprite {{$|00}} is a shared sprite, sharing the raven and the dacto. Which sprite loads is dependent upon whether it loads in the light world or dark world. Raven is the light world version of the sprite and the dacto is the dark world version.
 +
 
 +
== Raven ==
 +
=== Description ===
 +
Small, relatively harmless bird. Follows the player for a while, then flies away.
 +
 
 +
=== Combat Strategy ===
 +
Slash it once or twice, or run away.
 +
 
 +
== Dacto ==
 +
=== Description ===
 +
Small, relatively harmful bird. Follows the player for a while, then flies away.
 +
 
 +
=== Combat Strategy ===
 +
Slash it once or twice, or run away.
 +
 
 +
== Stats And Properties ==
 +
See [[Sprite Properties]]
 +
 
 +
The raven and dacto use the same property tables to define their default stats and properties, with a few hard-coded differences, as is common among shared sprites.
 +
 
 +
'''{{$|06B080}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7}}
 +
| Harmless
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|6}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|5}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|4-0}}
 +
| OAM Slots
 +
| {{Hex|0001}} ({{$|01}})
 +
|}
 +
 
 +
'''{{$|06B173}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7-0 }}
 +
| HP
 +
| {{Hex|0000 1100}} ({{$|0C}})
 +
|}
 +
This data is unused, instead HP is hard-coded in Sprite_Prep.asm as follows:
 +
*Raven ({{$|030965}}): {{$|04}}
 +
*Dacto ({{$|030966}}): {{$|08}}
 +
 
 +
'''{{$|06B266}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7-4}}
 +
| ?
 +
| {{Hex|1000}} ({{$|80}})
 +
|-
 +
| {{Hex|3-0}}
 +
| [[Damage Types|Damage Type]]
 +
| {{Hex|0011}} ({{$|03}})
 +
|}
 +
This data is unused, instead Damage is hard-coded in Sprite_Prep.asm as follows:
 +
*Raven ({{$|030963}}): {{$|81}}
 +
*Dacto ({{$|030964}}): {{$|88}}
 +
 
 +
'''{{$|06B359}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7}}
 +
| No Death Animation
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|6}}
 +
| Invincible
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|5}}
 +
| Adjust Child coordinates
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|4}}
 +
| Draw Shadow
 +
| {{Hex|1}}
 +
|-
 +
| {{Hex|3-1}}
 +
| Palette
 +
| {{Hex|100}} ({{$|04}})
 +
|-
 +
| {{Hex|0}}
 +
| ?
 +
| {{Hex|1}}
 +
|}
 +
 
 +
'''{{$|06B44C}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7}}
 +
| Ignore Collision Settings
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|6}}
 +
| Statis
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|5}}
 +
| Persist
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|4-0}}
 +
| Hit Box Dimensions
 +
| {{Hex|00000}} ({{$|00}})
 +
|}
 +
 
 +
'''{{$|06B53F}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7-4}}
 +
| Tile Interaction Hit Box
 +
| {{Hex|0000}} ({{$|00}})
 +
|-
 +
| {{Hex|3}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|2}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|1}}
 +
| Dies Like A Boss
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|0}}
 +
| Falls In Holes
 +
| {{Hex|0}}
 +
|}
 +
 
 +
'''{{$|06B632}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7}}
 +
| Disable Tile Interactions
 +
| {{Hex|1}}
 +
|-
 +
| {{Hex|6}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|5}}
 +
| Is shield Blockable
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|4}}
 +
| Alternate Damage Sound
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|3-0}}
 +
| Prize Pack
 +
| {{Hex|0011}} ({{$|03}})
 +
|}
 +
This data is unused, instead it is hard-coded in Sprite_Prep.asm as follows:
 +
*Raven ({{$|030967}}): {{$|06}}
 +
*Dacto ({{$|030968}}): {{$|02}}
 +
 
 +
'''{{$|06B725}}'''
 +
{|{{Prettytable}}
 +
! Bit(s)
 +
! Info
 +
! Value
 +
|-
 +
| {{Hex|7}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|6}}
 +
| ?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|5}}
 +
| Is Interactive
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|4}}
 +
| Deflect Projectiles
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|3}}
 +
| Collide With Less Tiles
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|2}}
 +
| Impervious To Sword/Hammer
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|1}}
 +
| Impervious To Arrows?
 +
| {{Hex|0}}
 +
|-
 +
| {{Hex|0}}
 +
| ?
 +
| {{Hex|0}}
 +
|}
 +
 
 +
== Code ==
 +
<Code>
 +
    ; *$EDD7B-$EDD82 LONG
 +
    Sprite_RavenLong:
 +
    {
 +
        PHB : PHK : PLB
 +
       
 +
        JSR SpritePrep_Raven
 +
       
 +
        PLB
 +
       
 +
        RTL
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; *$EDD83-$EDD84 DATA
 +
    pool Sprite_SetHflip:
 +
    {
 +
   
 +
    .h_flip
 +
        db $00, $40
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; *$EDD85-$EDDAB LOCAL
 +
    Sprite_Raven:
 +
    {
 +
        LDA $0B89, X : ORA.b #$30 : STA $0B89, X
 +
       
 +
        JSL Sprite_PrepAndDrawSingleLargeLong
 +
        JSR Sprite4_CheckIfActive
 +
        JSR Sprite4_CheckIfRecoiling
 +
        JSR Sprite4_CheckDamage
 +
        JSR Sprite4_Move
 +
       
 +
        LDA $0D80, X
 +
       
 +
        JSL UseImplicitRegIndexedLocalJumpTable
 +
       
 +
        dw Raven_InWait
 +
        dw Raven_Ascend
 +
        dw Raven_Attack
 +
        dw Raven_FleePlayer
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; $EDDAC-$EDDAD DATA
 +
    pool Raven_Ascend:
 +
    {
 +
   
 +
    ; \task Name this routine / pool.
 +
    .timers
 +
        db $10, $F8
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; *$EDDAE-$EDDE4 JUMP LOCATION
 +
    Raven_InWait:
 +
    {
 +
        JSR Sprite4_IsToRightOfPlayer
 +
        JSR Raven_SetHflip
 +
       
 +
        REP #$20
 +
       
 +
        LDA $22 : SUB $0FD8 : ADC.w #$0050 : CMP.w #$00A0 : BCS .player_too_far
 +
       
 +
        LDA $20 : SUB $0FDA : ADC.w #$0058 : CMP.w #$00A0 : BCS .player_too_far
 +
       
 +
        SEP #$20
 +
       
 +
        INC $0D80, X
 +
       
 +
        LDA.b #$18 : STA $0DF0, X
 +
       
 +
        LDA.b #$1E : JSL Sound_SetSfx3PanLong
 +
   
 +
    .player_too_far
 +
   
 +
        SEP #$20
 +
       
 +
        RTS
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; *$EDDE5-$EDE08 JUMP LOCATION
 +
    Raven_Ascend:
 +
    {
 +
        LDA $0DF0, X : BNE .delay
 +
       
 +
        INC $0D80, X
 +
       
 +
        LDY $0D90, X
 +
       
 +
        LDA .timers, Y : STA $0DF0, X
 +
       
 +
        LDA.b #$20
 +
       
 +
        JSL Sprite_ApplySpeedTowardsPlayerLong
 +
   
 +
    .delay
 +
   
 +
        INC $0F70, X
 +
       
 +
        LDA $1A : LSR A : AND.b #$01 : INC A : STA $0DC0, X
 +
       
 +
        RTS
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; *$EDE09-$EDE65 JUMP LOCATION
 +
    Raven_Attack:
 +
    {
 +
        LDA $0DF0, X : BNE .delay_fleeing
 +
       
 +
        LDA $0FFF : BEQ .always_flee_in_light_world
 +
       
 +
        ; Afaik, all Dark World 'ravens' are fearless. They look like mini-
 +
        ; pterodactyls.
 +
        LDA $0D90, X : BNE .is_fearless
 +
   
 +
    .always_flee_in_light_world
 +
   
 +
        INC $0D80, X
 +
   
 +
    .is_fearless
 +
    .delay_fleeing
 +
   
 +
        TXA : EOR $1A : LSR A : BCS .delay_speed_analysis
 +
       
 +
        LDA #$20 : JSL Sprite_ProjectSpeedTowardsPlayerLong
 +
   
 +
    ; *$EDE27 ALTERNATE ENTRY POINT
 +
    Raven_AccelerateToTargetSpeed:
 +
   
 +
        LDA $0D40, X : CMP $00 : BEQ .y_speed_at_target
 +
                                BPL .y_speed_above_target
 +
       
 +
        INC $0D40, X
 +
       
 +
        BRA .check_x_speed
 +
   
 +
    .y_speed_above_target
 +
   
 +
        DEC $0D40, X
 +
   
 +
    .y_speed_at_target
 +
    .check_x_speed
 +
   
 +
        LDA $0D50, X : CMP $01 : BEQ .x_speed_at_target
 +
                                BPL .x_speed_above_target
 +
       
 +
        INC $0D50, X
 +
       
 +
        BRA .animate
 +
   
 +
    .x_speed_above_target
 +
   
 +
        DEC $0D50, X
 +
   
 +
    .x_speed_at_target
 +
    .delay_speed_analysis
 +
    .animate
 +
   
 +
    ; *$EDE49 ALTERNATE ENTRY POINT
 +
    shared Raven_Animate:
 +
   
 +
        LDA $1A : LSR A : AND.b #$01 : INC A : STA $0DC0, X
 +
       
 +
        LDA $0D50, X : ASL A : ROL A : AND.b #$01 : TAY
 +
   
 +
    ; *$EDE5A ALTERNATE ENTRY POINT
 +
    shared Raven_SetHflip:
 +
   
 +
        LDA $0F50, X : AND.b #$BF : ORA $DD83, Y : STA $0F50, X
 +
       
 +
        RTS
 +
    }
 +
 
 +
; ==============================================================================
 +
 
 +
    ; *$EDE66-$EDE81 JUMP LOCATION
 +
    Raven_FleePlayer:
 +
    {
 +
        TXA : EOR $1A : LSR A : BCS Raven_Animate
 +
       
 +
        LDA.b #$30 : JSL Sprite_ProjectSpeedTowardsPlayerLong
 +
       
 +
        LDA $00 : EOR.b #$FF : INC A : STA $00
 +
       
 +
        LDA $01 : EOR.b #$FF : INC A : STA $01
 +
       
 +
        BRA Raven_AccelerateToTargetSpeed
 +
    }
 +
</Code>

Latest revision as of 09:55, 19 December 2016

This is a subpage of Sprites

Sprite $00 is a shared sprite, sharing the raven and the dacto. Which sprite loads is dependent upon whether it loads in the light world or dark world. Raven is the light world version of the sprite and the dacto is the dark world version.

Raven

Description

Small, relatively harmless bird. Follows the player for a while, then flies away.

Combat Strategy

Slash it once or twice, or run away.

Dacto

Description

Small, relatively harmful bird. Follows the player for a while, then flies away.

Combat Strategy

Slash it once or twice, or run away.

Stats And Properties

See Sprite Properties

The raven and dacto use the same property tables to define their default stats and properties, with a few hard-coded differences, as is common among shared sprites.

$06B080

Bit(s) Info Value
7 Harmless 0
6  ? 0
5  ? 0
4-0 OAM Slots 0001 ($01)

$06B173

Bit(s) Info Value
7-0 HP 0000 1100 ($0C)

This data is unused, instead HP is hard-coded in Sprite_Prep.asm as follows:

  • Raven ($030965): $04
  • Dacto ($030966): $08

$06B266

Bit(s) Info Value
7-4  ? 1000 ($80)
3-0 Damage Type 0011 ($03)

This data is unused, instead Damage is hard-coded in Sprite_Prep.asm as follows:

  • Raven ($030963): $81
  • Dacto ($030964): $88

$06B359

Bit(s) Info Value
7 No Death Animation 0
6 Invincible 0
5 Adjust Child coordinates 0
4 Draw Shadow 1
3-1 Palette 100 ($04)
0  ? 1

$06B44C

Bit(s) Info Value
7 Ignore Collision Settings 0
6 Statis 0
5 Persist 0
4-0 Hit Box Dimensions 00000 ($00)

$06B53F

Bit(s) Info Value
7-4 Tile Interaction Hit Box 0000 ($00)
3  ? 0
2  ? 0
1 Dies Like A Boss 0
0 Falls In Holes 0

$06B632

Bit(s) Info Value
7 Disable Tile Interactions 1
6  ? 0
5 Is shield Blockable 0
4 Alternate Damage Sound 0
3-0 Prize Pack 0011 ($03)

This data is unused, instead it is hard-coded in Sprite_Prep.asm as follows:

  • Raven ($030967): $06
  • Dacto ($030968): $02

$06B725

Bit(s) Info Value
7  ? 0
6  ? 0
5 Is Interactive 0
4 Deflect Projectiles 0
3 Collide With Less Tiles 0
2 Impervious To Sword/Hammer 0
1 Impervious To Arrows? 0
0  ? 0

Code

   ; *$EDD7B-$EDD82 LONG
   Sprite_RavenLong:
   {
       PHB : PHK : PLB
       
       JSR SpritePrep_Raven
       
       PLB
       
       RTL
   }
==============================================================================
   ; *$EDD83-$EDD84 DATA
   pool Sprite_SetHflip:
   {
   
   .h_flip
       db $00, $40
   }
==============================================================================
   ; *$EDD85-$EDDAB LOCAL
   Sprite_Raven:
   {
       LDA $0B89, X : ORA.b #$30 : STA $0B89, X
       
       JSL Sprite_PrepAndDrawSingleLargeLong
       JSR Sprite4_CheckIfActive
       JSR Sprite4_CheckIfRecoiling
       JSR Sprite4_CheckDamage
       JSR Sprite4_Move
       
       LDA $0D80, X
       
       JSL UseImplicitRegIndexedLocalJumpTable
       
       dw Raven_InWait
       dw Raven_Ascend
       dw Raven_Attack
       dw Raven_FleePlayer
   }
==============================================================================
   ; $EDDAC-$EDDAD DATA
   pool Raven_Ascend:
   {
   
   ; \task Name this routine / pool.
   .timers
       db $10, $F8
   }
==============================================================================
   ; *$EDDAE-$EDDE4 JUMP LOCATION
   Raven_InWait:
   {
       JSR Sprite4_IsToRightOfPlayer
       JSR Raven_SetHflip
       
       REP #$20
       
       LDA $22 : SUB $0FD8 : ADC.w #$0050 : CMP.w #$00A0 : BCS .player_too_far
       
       LDA $20 : SUB $0FDA : ADC.w #$0058 : CMP.w #$00A0 : BCS .player_too_far
       
       SEP #$20
       
       INC $0D80, X
       
       LDA.b #$18 : STA $0DF0, X
       
       LDA.b #$1E : JSL Sound_SetSfx3PanLong
   
   .player_too_far
   
       SEP #$20
       
       RTS
   }
==============================================================================
   ; *$EDDE5-$EDE08 JUMP LOCATION
   Raven_Ascend:
   {
       LDA $0DF0, X : BNE .delay
       
       INC $0D80, X
       
       LDY $0D90, X
       
       LDA .timers, Y : STA $0DF0, X
       
       LDA.b #$20
       
       JSL Sprite_ApplySpeedTowardsPlayerLong
   
   .delay
   
       INC $0F70, X
       
       LDA $1A : LSR A : AND.b #$01 : INC A : STA $0DC0, X
       
       RTS
   }
==============================================================================
   ; *$EDE09-$EDE65 JUMP LOCATION
   Raven_Attack:
   {
       LDA $0DF0, X : BNE .delay_fleeing
       
       LDA $0FFF : BEQ .always_flee_in_light_world
       
       ; Afaik, all Dark World 'ravens' are fearless. They look like mini-
       ; pterodactyls.
       LDA $0D90, X : BNE .is_fearless
   
   .always_flee_in_light_world
   
       INC $0D80, X
   
   .is_fearless
   .delay_fleeing
   
       TXA : EOR $1A : LSR A : BCS .delay_speed_analysis
       
       LDA #$20 : JSL Sprite_ProjectSpeedTowardsPlayerLong
   
   ; *$EDE27 ALTERNATE ENTRY POINT
   Raven_AccelerateToTargetSpeed:
   
       LDA $0D40, X : CMP $00 : BEQ .y_speed_at_target
                                BPL .y_speed_above_target
       
       INC $0D40, X
       
       BRA .check_x_speed
   
   .y_speed_above_target
   
       DEC $0D40, X
   
   .y_speed_at_target
   .check_x_speed
   
       LDA $0D50, X : CMP $01 : BEQ .x_speed_at_target
                                BPL .x_speed_above_target
       
       INC $0D50, X
       
       BRA .animate
   
   .x_speed_above_target
   
       DEC $0D50, X
   
   .x_speed_at_target
   .delay_speed_analysis
   .animate
   
   ; *$EDE49 ALTERNATE ENTRY POINT
   shared Raven_Animate:
   
       LDA $1A : LSR A : AND.b #$01 : INC A : STA $0DC0, X
       
       LDA $0D50, X : ASL A : ROL A : AND.b #$01 : TAY
   
   ; *$EDE5A ALTERNATE ENTRY POINT
   shared Raven_SetHflip:
   
       LDA $0F50, X : AND.b #$BF : ORA $DD83, Y : STA $0F50, X
       
       RTS
   }
==============================================================================
   ; *$EDE66-$EDE81 JUMP LOCATION
   Raven_FleePlayer:
   {
       TXA : EOR $1A : LSR A : BCS Raven_Animate
       
       LDA.b #$30 : JSL Sprite_ProjectSpeedTowardsPlayerLong
       
       LDA $00 : EOR.b #$FF : INC A : STA $00
       
       LDA $01 : EOR.b #$FF : INC A : STA $01
       
       BRA Raven_AccelerateToTargetSpeed
   }

Retrieved from "http://alttp.run/hacking/index.php?title=Raven&oldid=518"