mirror of https://github.com/nmlgc/ReC98.git
114 lines
2.6 KiB
NASM
114 lines
2.6 KiB
NASM
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; void explosions_big_update_and_render(void);
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public explosions_big_update_and_render
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explosions_big_update_and_render proc near
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@@angle = byte ptr -5
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@@draw_y = word ptr -4
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@@i = word ptr -2
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enter 6, 0
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push si
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push di
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mov si, offset _explosions_big
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cmp [si+explosion_t.flag], 0
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jz @@reset_frame
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mov [bp+@@i], 0
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mov [bp+@@angle], 0
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jmp short @@more_sprites?
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; ---------------------------------------------------------------------------
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@@sprite_loop:
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push [si+explosion_t.center.x]
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push [si+explosion_t.EXPLOSION_radius_cur.x]
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mov al, [bp+@@angle]
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mov ah, 0
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add ax, ax
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mov bx, ax
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push _CosTable8[bx]
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call vector1_at
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mov di, ax
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sar ax, 4
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mov di, ax
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push [si+explosion_t.center.y]
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push [si+explosion_t.EXPLOSION_radius_cur.y]
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mov al, [si+explosion_t.angle_offset]
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add al, [bp+@@angle]
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mov ah, 0
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add ax, ax
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mov bx, ax
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push _SinTable8[bx]
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call vector1_at
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mov [bp+@@draw_y], ax
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sar ax, 4
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; Yes, these are not clipped exactly to the playfield boundaries?
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add ax, -16
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mov [bp+@@draw_y], ax
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or di, di
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jl short @@next_sprite
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cmp di, 384
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jg short @@next_sprite
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cmp [bp+@@draw_y], 0
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jl short @@next_sprite
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cmp [bp+@@draw_y], 336
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jg short @@next_sprite
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call super_put pascal, di, ax, 3
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@@next_sprite:
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inc [bp+@@i]
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mov al, [bp+@@angle]
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add al, (256 / EXPLOSION_BIG_SPRITES)
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mov [bp+@@angle], al
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@@more_sprites?:
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cmp [bp+@@i], EXPLOSION_BIG_SPRITES
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jl short @@sprite_loop
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mov ax, [si+explosion_t.EXPLOSION_radius_delta.x]
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add [si+explosion_t.EXPLOSION_radius_cur.x], ax
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mov ax, [si+explosion_t.EXPLOSION_radius_delta.y]
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add [si+explosion_t.EXPLOSION_radius_cur.y], ax
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inc [si+explosion_t.age]
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cmp [si+explosion_t.age], EXPLOSION_AGE_MAX
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jb short @@tone_update
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mov [si+explosion_t.flag], 0
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@@tone_update:
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inc _explosion_big_frame
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cmp _explosion_big_frame, 8
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jge short @@tone_flash?
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test byte ptr _explosion_big_frame, 1
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jz short @@tone_flash?
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mov PaletteTone, 150
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jmp short @@ret_palette_changed
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; ---------------------------------------------------------------------------
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@@tone_flash?:
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cmp _explosion_big_frame, 8
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jl short @@tone_regular
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cmp _explosion_big_frame, 16
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jge short @@tone_regular
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mov ax, _explosion_big_frame
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imul ax, 6
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mov dx, 196
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sub dx, ax
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mov PaletteTone, dx
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@@ret_palette_changed:
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mov _palette_changed, 1
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jmp short @@ret
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; ---------------------------------------------------------------------------
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@@tone_regular:
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mov PaletteTone, 100
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jmp short @@ret_palette_changed
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; ---------------------------------------------------------------------------
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@@reset_frame:
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mov _explosion_big_frame, 0
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@@ret:
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pop di
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pop si
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leave
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retn
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explosions_big_update_and_render endp
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