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[Decompilation] [th05] Shinki: Pattern 6/11 

The one where random blue 32×32 bullets rain from near the top of the
playfield, together with aimed spreads from random positions on
Shinki's wings. First white-wing pattern.

Part of P0190, funded by nrook.
This commit is contained in:
nmlgc 2022-04-15 22:05:37 +02:00
parent 37fac9a2a0
commit 4ea60d1155
3 changed files with 43 additions and 64 deletions
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4
th04/main/pattern.hpp
View File

@ -1,3 +1,7 @@
// A danmaku pattern function with no fixed maximum time. Fires projectiles in
// repeating cycles until no longer called.
typedef void (near *near pattern_loop_func_t)(void);
// A danmaku pattern function that runs for a limited amount of time. Should
// return `true` when done.
typedef bool (near *near pattern_oneshot_func_t)(void);

37
th05/main/boss/b6.cpp
View File

@ -19,6 +19,8 @@ extern "C" {
#include "th04/main/bullet/bullet.hpp"
#include "th04/main/gather.hpp"
}
#include "th05/main/custom.h"
#include "th05/main/bullet/b6ball.hpp"
#include "th05/main/bullet/laser.hpp"
#include "th05/main/boss/boss.hpp"
#include "th05/sprites/main_pat.h"
@ -274,3 +276,38 @@ bool near pattern_wing_preparation(void)
#undef wing_frames
#undef tone
}
void near pattern_random_rain_and_spreads_from_wings(void)
{
if(boss.phase_frame <= 128) {
return;
}
if((boss.phase_frame % 8) == 0) {
b6ball_template.origin.x.v = randring2_next16_mod(to_sp(PLAYFIELD_W));
b6ball_template.origin.y.v = randring2_next16_ge_lt_sp(
((2 / 23.0f) * PLAYFIELD_H), ((6 / 23.0f) * PLAYFIELD_H)
);
b6ball_template.angle = 0x40;
b6ball_template.speed.v = randring2_next8_and_ge_lt_sp(3.0f, 5.0f);
b6ball_template.patnum_tiny = PAT_B6BALL_BLUE_1;
b6balls_add();
snd_se_play(3);
}
if((boss.phase_frame % 24) == 0) {
bullet_template.origin.x.v = shinki_wing_random_x();
bullet_template.origin.y.v = (
boss.pos.cur.y.v - randring2_next16_mod(to_sp(BOSS_H))
);
bullet_template.spawn_type = (BST_CLOUD_FORWARDS | BST_NO_SLOWDOWN);
bullet_template.patnum = PAT_BULLET16_N_BLUE;
bullet_template.group = BG_SPREAD_AIMED;
bullet_template.spread = 5;
bullet_template.spread_angle_delta = select_for_rank(
0x10, 0x0C, 0x0A, 0x08
);
bullet_template.angle = 0x00;
bullet_template.speed.set(3.0f);
bullet_template_tune();
bullets_add_regular();
}
}

66
th05_main.asm
View File

@ -19182,73 +19182,11 @@ BOSS_6_TEXT segment byte public 'CODE' use16
@pattern_random_directional_and_k$qv procdesc near
@pattern_dense_blue_stacks$qv procdesc near
@pattern_wing_preparation$qv procdesc near
@pattern_random_rain_and_spreads_$qv procdesc near
BOSS_6_TEXT ends
BOSS_X_TEXT segment byte public 'CODE' use16
; =============== S U B R O U T I N E =======================================
; Attributes: bp-based frame
sub_1DA1C proc near
push bp
mov bp, sp
cmp _boss_phase_frame, 128
jle loc_1DAD0
mov ax, _boss_phase_frame
mov bx, 8
cwd
idiv bx
or dx, dx
jnz short loc_1DA6A
call randring2_next16_mod pascal, (PLAYFIELD_W shl 4)
mov b6ball_template.pos.cur.x, ax
call randring2_next16_mod pascal, (64 shl 4)
add ax, (32 shl 4)
mov b6ball_template.pos.cur.y, ax
mov b6ball_template.B6B_angle, 40h
call randring2_next16_and pascal, 1Fh
add al, (3 shl 4)
mov b6ball_template.B6B_speed, al
mov b6ball_template.B6B_patnum_tiny, PAT_B6BALL_BLUE_1
call @b6balls_add$qv
call snd_se_play pascal, 3
loc_1DA6A:
mov ax, _boss_phase_frame
mov bx, 24
cwd
idiv bx
or dx, dx
jnz short loc_1DAD0
call randring2_next16_mod pascal, (256 shl 4)
add ax, _boss_pos.cur.x
sub ax, (128 shl 4)
mov _bullet_template.BT_origin.x, ax
push (64 shl 4)
call randring2_next16_mod
mov dx, _boss_pos.cur.y
sub dx, ax
mov _bullet_template.BT_origin.y, dx
mov _bullet_template.spawn_type, BST_CLOUD_FORWARDS or BST_NO_SLOWDOWN
mov _bullet_template.patnum, PAT_BULLET16_N_BLUE
mov _bullet_template.BT_group, BG_SPREAD_AIMED
mov _bullet_template.spread, 5
push (16 shl 16) or 12
push (10 shl 16) or 8
call select_for_rank
mov _bullet_template.spread_angle_delta, al
mov _bullet_template.BT_angle, 0
mov _bullet_template.speed, (3 shl 4)
call _bullet_template_tune
call _bullets_add_regular
loc_1DAD0:
pop bp
retn
sub_1DA1C endp
; =============== S U B R O U T I N E =======================================
; Attributes: bp-based frame
@ -20065,7 +20003,7 @@ loc_1E333:
push ((45 shl 4) shl 16) or (50 shl 4)
call @select_for_playchar$qiiii
mov _boss_hitbox_radius.x, ax
mov fp_2CE4A, offset sub_1DA1C
mov fp_2CE4A, offset @pattern_random_rain_and_spreads_$qv
loc_1E36F:
mov _boss_statebyte[10], 0