mirror of https://github.com/nmlgc/ReC98.git
61 lines
1.2 KiB
NASM
61 lines
1.2 KiB
NASM
; Creates a hit animation at the position of [shot], invalidating [shot] in
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; the process.
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; void pascal near hitshot_from(shot_t near *shot)
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public HITSHOT_FROM
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hitshot_from proc near
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@@shot = word ptr 4
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push bp
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mov bp, sp
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push si
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push di
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mov di, [bp+@@shot]
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mov ax, _hitshot_next_free_id
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imul ax, size hitshot_t
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add ax, offset _hitshots
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mov si, ax
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cmp _hitshot_next_free_id, HITSHOT_COUNT - 1
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jnb short @@wrap_id
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inc _hitshot_next_free_id
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jmp short @@convert_age
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@@wrap_id:
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mov _hitshot_next_free_id, 0
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@@convert_age:
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mov [di+shot_t.flag], 2
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cmp [si+hitshot_t.HITSHOT_AGE], 0
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jnz short @@ret ; Wat?
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mov [si+hitshot_t.HITSHOT_AGE], 1
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cmp [di+shot_t.patnum_base], 20
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jnz short @@patnum_32
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mov [si+hitshot_t.patnum], 28
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jmp short @@convert_pos_and_brake
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@@patnum_32:
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mov [si+hitshot_t.patnum], 32
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@@convert_pos_and_brake:
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mov eax, dword ptr [di+hitshot_t.pos.cur]
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mov dword ptr [si+hitshot_t.pos.cur], eax
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mov eax, dword ptr [di+shot_t.pos.prev]
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mov dword ptr [si+hitshot_t.pos.prev], eax
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mov ax, [di+shot_t.pos.velocity.x]
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mov bx, 6
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cwd
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idiv bx
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mov [si+hitshot_t.pos.velocity.x], ax
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mov ax, [di+shot_t.pos.velocity.y]
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cwd
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idiv bx
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mov [si+hitshot_t.pos.velocity.y], ax
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@@ret:
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pop di
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pop si
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pop bp
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retn 2
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hitshot_from endp
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