mirror of https://github.com/nmlgc/ReC98.git
[Reverse-engineering] [th04] Custom entity structure 6: Gengetsu's column lines
Ending on the simplest one. Part of P0241, funded by [Anonymous] and Blue Bolt.
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nmlgc
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@ -2,6 +2,24 @@
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/// ------------------------------
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#include "platform.h"
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#include "pc98.h"
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#include "th01/math/subpixel.hpp"
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#include "th04/main/playfld.hpp"
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#include "th04/main/custom.hpp"
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// Structures
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// ----------
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#define SPAWNCOLUMN_COUNT 16
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struct spawncolumn_t {
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int8_t unused[2];
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PlayfieldPoint pos;
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int8_t padding[20];
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};
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#define spawncolumns (reinterpret_cast<spawncolumn_t *>(custom_entities))
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// ----------
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#define wave_amp gengetsu_wave_amp
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uint8_t wave_amp = 0x00; // Should really have been signed.
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@ -11600,7 +11600,7 @@ loc_12F55:
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public @GENGETSU_FG_RENDER$QV
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@gengetsu_fg_render$qv proc near
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var_2 = word ptr -2
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@@spawncolumn = word ptr -2
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enter 2, 0
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push si
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@ -11757,25 +11757,25 @@ loc_130B6:
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loc_130B8:
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call @grcg_setcolor_direct_raw$qv
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mov [bp+var_2], 0B204h
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mov [bp+@@spawncolumn], offset gengetsu_spawncolumns
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xor si, si
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jmp short loc_130E4
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; ---------------------------------------------------------------------------
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loc_130C4:
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mov bx, [bp+var_2]
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mov ax, [bx+2]
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mov bx, [bp+@@spawncolumn]
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mov ax, [bx+gengetsu_spawncolumn_t.BX2S_pos.x]
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mov bx, 16
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cwd
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idiv bx
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add ax, 32
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add ax, PLAYFIELD_LEFT
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mov di, ax
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call grcg_vline pascal, ax, bx, PLAYFIELD_BOTTOM - 1
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inc si
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add [bp+var_2], 1Ah
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add [bp+@@spawncolumn], size gengetsu_spawncolumn_t
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loc_130E4:
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cmp si, 10h
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cmp si, GENGETSU_SPAWNCOLUMN_COUNT
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jl short loc_130C4
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loc_130E9:
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@ -30289,7 +30289,7 @@ var_1 = byte ptr -1
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push 1
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call randring2_next16_and
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mov [bp+var_1], al
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mov si, 0B204h
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mov si, offset gengetsu_spawncolumns
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xor di, di
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jmp short loc_1FF29
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; ---------------------------------------------------------------------------
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@ -30298,27 +30298,27 @@ loc_1FEFB:
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cmp [bp+var_1], 0
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jnz short loc_1FF0C
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mov ax, di
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imul ax, 180h
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add ax, 0C0h
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imul ax, ((PLAYFIELD_W / GENGETSU_SPAWNCOLUMN_COUNT) shl 4)
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add ax, (12 shl 4)
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jmp short loc_1FF1D
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; ---------------------------------------------------------------------------
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loc_1FF0C:
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push 0C0h
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push (12 shl 4)
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call randring2_next16_mod
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mov dx, di
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imul dx, 180h
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add dx, 60h
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imul dx, ((PLAYFIELD_W / GENGETSU_SPAWNCOLUMN_COUNT) shl 4)
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add dx, (6 shl 4)
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add ax, dx
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loc_1FF1D:
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mov [si+2], ax
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mov word ptr [si+4], 0
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mov [si+gengetsu_spawncolumn_t.BX2S_pos.x], ax
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mov [si+gengetsu_spawncolumn_t.BX2S_pos.y], 0
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inc di
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add si, 1Ah
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add si, size gengetsu_spawncolumn_t
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loc_1FF29:
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cmp di, 10h
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cmp di, GENGETSU_SPAWNCOLUMN_COUNT
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jl short loc_1FEFB
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loc_1FF2E:
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@ -30391,20 +30391,20 @@ loc_1FFF8:
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mov _bullet_template.spawn_type, BST_BULLET16
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mov _bullet_template.BT_origin.y, 0
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mov _bullet_template.BT_group, BG_SINGLE
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mov si, 0B204h
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mov si, offset gengetsu_spawncolumns
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xor di, di
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jmp short loc_2002B
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; ---------------------------------------------------------------------------
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loc_2001E:
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mov ax, [si+2]
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mov ax, [si+gengetsu_spawncolumn_t.BX2S_pos.x]
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mov _bullet_template.BT_origin.x, ax
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call _bullets_add_regular_fixedspeed
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inc di
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add si, 1Ah
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add si, size gengetsu_spawncolumn_t
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loc_2002B:
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cmp di, 10h
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cmp di, GENGETSU_SPAWNCOLUMN_COUNT
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jl short loc_2001E
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call snd_se_play pascal, 3
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jmp short loc_20044
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@ -32171,6 +32171,20 @@ yuuka6_safetycircle_t ends
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yuuka6_safetycircle equ <_custom_entities + ((CUSTOM_COUNT - 1) * size custom_t)>
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; -----------------------------
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; Gengetsu's column bullet spawn lines
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; ------------------------------------
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GENGETSU_SPAWNCOLUMN_COUNT = 16
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gengetsu_spawncolumn_t struc
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db 2 dup(?)
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BX2S_pos Point <?>
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db 20 dup(?)
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gengetsu_spawncolumn_t ends
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gengetsu_spawncolumns equ <_custom_entities>
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; ------------------------------------
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include th04/main/custom[bss].asm
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include th04/main/player/shots[bss].asm
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db 96 dup(?)
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