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ReC98/th05/bullet.asm

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[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
.386
locals
include libs/master.lib/macros.inc
include th04/math/motion.inc
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
include th05/main/bullet/types.inc
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
include th04/main/bullet/bullet.inc
MAIN_03 group MAIN_031_TEXT
extrn _bullet_template:bullet_template_t
extrn _playperf:byte
; ----------------------------------------------------------------------------
MAIN_031_TEXT segment word public 'CODE' use16
assume cs:MAIN_03
tune proc
public TUNE_FOR_EASY
public TUNE_FOR_HARD
public TUNE_FOR_LUNATIC
; Local variable registers
; ------------------------
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
@@group_reg equ <bx>
@@group equ <bl>
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
@@group_table equ <cx>
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
@@spread_reg equ <ax>
@@spread equ <al>
@@spread_angle_delta equ <ah>
@@stack_reg equ <dx>
@@stack equ <dl>
@@stack_speed_delta equ <dh>
; ------------------------
TUNE_FOR_EASY label near
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
movzx @@group_reg, _bullet_template.BT_group
cmp @@group, BG_SPREAD
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
jb short @@easy_ret
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
cmp @@group, BG_RANDOM_ANGLE_AND_SPEED
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
ja short @@easy_ret
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
sub @@group, BG_SPREAD
[Decompilation] [th04/th05] Applying VRAM scrolling to Y coordinates (segment 3) … Wait, we *can* decompile functions with both parameters, no stack frame, and a Pascal calling convention?! Good that I already forgot how impossible it was to decompile the first function I looked at that fell into this category! Part of P0148, funded by [Anonymous].
2021-07-15 17:20:11 +00:00
mov @@group_table, offset MAIN_03:@@easy_group_table
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
jmp short @@set_vars_and_dispatch
; ---------------------------------------------------------------------------
@@easy_spread:
@@easy_spread_stack:
cmp @@spread, 3
jb short @@easy_ret
sub _bullet_template.spread, 2
retn
; ---------------------------------------------------------------------------
@@easy_stack:
shr @@stack_speed_delta, 2
sub _bullet_template.stack_speed_delta, @@stack_speed_delta
; Since unused fields of the bullet template aren't typically reset, this
; translates to "delta of the last spread that was fired" - whenever that
; was. uth05win thought this is a bug and changed it to @@stack.
cmp @@spread_angle_delta, 2
jb short @@easy_ret
dec _bullet_template.BT_stack
retn
; ---------------------------------------------------------------------------
@@easy_ring:
@@easy_ring_stack:
@@easy_random:
shr _bullet_template.spread, 1
@@easy_ret:
retn
; ---------------------------------------------------------------------------
even
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
@@easy_group_table label word
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
dw offset @@easy_spread
dw offset @@easy_ring
dw offset @@easy_stack
dw offset @@easy_spread_stack
dw offset @@easy_ring_stack
dw offset @@easy_random
; ---------------------------------------------------------------------------
; ---------------------------------------------------------------------------
TUNE_FOR_HARD label near
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
movzx @@group_reg, _bullet_template.BT_group
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
; "Well, I'd like to tune single bullets on Hard, but not spreads… so
; let's just handle single bullets outside the table dispatch! :zunpet:"
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
cmp @@group, BG_SINGLE_AIMED
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
jbe short @@hard_single
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
cmp @@group, BG_RING
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
jb short @@hard_ret
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
cmp @@group, BG_RANDOM_ANGLE_AND_SPEED
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
ja short @@hard_ret
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
sub @@group, BG_RING
[Decompilation] [th04/th05] Applying VRAM scrolling to Y coordinates (segment 3) … Wait, we *can* decompile functions with both parameters, no stack frame, and a Pascal calling convention?! Good that I already forgot how impossible it was to decompile the first function I looked at that fell into this category! Part of P0148, funded by [Anonymous].
2021-07-15 17:20:11 +00:00
mov @@group_table, offset MAIN_03:@@hard_group_table
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
@@set_vars_and_dispatch:
mov @@spread_reg, word ptr _bullet_template.spread
mov @@stack_reg, word ptr _bullet_template.BT_stack
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
and @@group, (not BGC0_AIMED)
add @@group_reg, @@group_table
jmp word ptr cs:[@@group_reg]
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
; ---------------------------------------------------------------------------
@@hard_single:
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
add _bullet_template.BT_group, BGCS_STACK
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
mov word ptr _bullet_template.BT_stack, (6 shl 8) or 2
retn
; ---------------------------------------------------------------------------
@@hard_stack:
@@hard_spread_stack:
shr @@stack_speed_delta, 1
add _bullet_template.stack_speed_delta, @@stack_speed_delta
retn
; ---------------------------------------------------------------------------
@@hard_ring:
@@hard_ring_stack:
shr @@spread, 2
cmp @@spread, 6
jbe short @@hard_add_to_spread
mov @@spread, 6
@@hard_add_to_spread:
add _bullet_template.spread, @@spread
@@hard_ret:
retn
; ---------------------------------------------------------------------------
@@hard_random:
shr @@spread, 1
jmp short @@hard_add_to_spread
even
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
@@hard_group_table label word
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
dw offset @@hard_ring
dw offset @@hard_stack
dw offset @@hard_spread_stack
dw offset @@hard_ring_stack
dw offset @@hard_random
; ---------------------------------------------------------------------------
; ---------------------------------------------------------------------------
TUNE_FOR_LUNATIC label near
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
movzx @@group_reg, _bullet_template.BT_group
cmp @@group, BG_RANDOM_ANGLE_AND_SPEED
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
ja short @@lunatic_ret
[Decompilation] [th04/th05] Applying VRAM scrolling to Y coordinates (segment 3) … Wait, we *can* decompile functions with both parameters, no stack frame, and a Pascal calling convention?! Good that I already forgot how impossible it was to decompile the first function I looked at that fell into this category! Part of P0148, funded by [Anonymous].
2021-07-15 17:20:11 +00:00
mov @@group_table, offset MAIN_03:@@lunatic_group_table
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
jmp short @@set_vars_and_dispatch
; ---------------------------------------------------------------------------
@@lunatic_single:
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
add _bullet_template.BT_group, BGCC_SPREAD
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
mov word ptr _bullet_template.spread, (6 shl 8) or 3
retn
; ---------------------------------------------------------------------------
@@lunatic_stack:
shr @@stack_speed_delta, 1
add _bullet_template.stack_speed_delta, @@stack_speed_delta
inc _bullet_template.BT_stack
retn
; ---------------------------------------------------------------------------
@@lunatic_spread:
@@lunatic_spread_stack:
add _bullet_template.spread, 2
retn
; ---------------------------------------------------------------------------
@@lunatic_ring:
@@lunatic_ring_stack:
; mov al, @@spread
xor ah, ah
mov dl, 3
div dl ; @@spread /= 3
cmp @@spread, 12
jbe short @@lunatic_add_to_spread
mov @@spread, 12
@@lunatic_add_to_spread:
@@lunatic_random:
add _bullet_template.spread, @@spread
@@lunatic_ret:
retn
even
[Maintenance] Rename pellet/bullet "patterns" to "groups" We're going to need some name for the longer, boss-specific danmaku animations. Turns out that these are exactly called "patterns" in Sparen's glossary: https://sparen.github.io/ph3tutorials/ddsg0.html#sub4 So what we called a "pattern" is actually called a "group". Whoops! Part of P0142, funded by Yanga.
2021-05-25 16:22:48 +00:00
@@lunatic_group_table label word
[Reverse-engineering] [th05] Difficulty- and rank-based bullet pattern tuning If C allowed labels of other functions as `goto` targets, this *might* have been decompilable into something useful to modders. But like this, there's no point in even trying. Yeah, you *really* don't want to base your fangame mod on TH05. Part of P0109, funded by [Anonymous] and Blue Bolt.
2020-08-15 12:54:42 +00:00
dw offset @@lunatic_single
dw offset @@lunatic_spread
dw offset @@lunatic_ring
dw offset @@lunatic_stack
dw offset @@lunatic_spread_stack
dw offset @@lunatic_ring_stack
dw offset @@lunatic_random
tune endp
MAIN_031_TEXT ends
end