ReC98/th04/math/motion.inc

25 lines
652 B
PHP

motion_t struc
cur Point ?
prev Point ?
velocity Point ?
motion_t ends
MOTION_UPDATE_DEF macro instance
public @PlayfieldMotion@update_seg&instance&$qv
@PlayfieldMotion@update_seg&instance&$qv proc near
arg_bx near, @motion:word
mov bx, @motion
mov ax, word ptr [bx+motion_t.cur]
mov word ptr [bx+motion_t.prev], ax
add ax, word ptr [bx+motion_t.velocity]
mov word ptr [bx+motion_t.cur], ax
add bx, Point.y
mov dx, word ptr [bx+motion_t.cur]
mov word ptr [bx+motion_t.prev], dx
add dx, word ptr [bx+motion_t.velocity]
mov word ptr [bx+motion_t.cur], dx
ret_bx
@PlayfieldMotion@update_seg&instance&$qv endp
endm