deadvey
07932e2ce0
I forgot to commit for a while and I haven't done much, but got the very basics of the game pong working. Signed-off-by: deadvey <deadvey@deadvey.com>
87 lines
1.4 KiB
NASM
87 lines
1.4 KiB
NASM
game_pong:
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pusha
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call os_set_graphics_mode
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jmp .draw_player_1
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jmp .draw_player_2
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jmp .detect_inputi
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.draw_player_1:
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; X coords
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mov ax, [p1_x]
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mov [x_start], ax
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mov [x_end], ax
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; Y coords
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mov bx, [p1_y]
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mov [y_start], bx
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add bx, [bat_height] ; Add the bat height to the y coord
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mov [y_end], b
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call os_draw_graphical_rectangle
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ret
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.draw_player_2:
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; X coords
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mov ax, [p2_x]
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mov [x_start], ax
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mov [x_end], ax
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; Y coords
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mov bx, [p2_y]
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mov [y_start], bx
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add bx, [bat_height] ; Add the bat height to the y coord
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mov [y_end], bx
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call os_draw_graphical_rectangle
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ret
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.detect_input:
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call os_read_input
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; Exit if backspace is pressed
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cmp al, 08h
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je .finish
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; Go up when you press 'w'
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cmp al, 77h
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je .p1_up
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; Go up when you press 's'
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cmp al, 73h
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je .p1_down
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; Loop back
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jmp .detect_input
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.p1_down:
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; X coords
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mov ax, [p1_x]
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mov [x_start], ax
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mov [x_end], ax
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; Y coords
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mov bx, [p1_y]
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add bx, 5 ; Move the bat down 5
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mov [y_start], bx
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add bx, [bat_height] ; Add the bat height to the y coord
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mov [y_end], bx
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call os_draw_graphical_rectangle
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ret
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.p1_up:
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mov ax, [move_distance]
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sub ax, [p1_y]
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call os_draw_graphical_rectangle
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ret
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.finish:
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call os_set_text_mode
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popa
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ret
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section .data
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x_start dw 0
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y_start dw 0
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x_end dw 0
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y_end dw 0
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p1_y dw 5
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p2_y dw 0
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p1_x dw 5
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p2_x dw 30
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bat_height dw 20
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move_distance dw 5
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colour db 1111b
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