Menu Variables

MenuExitflag		db	0
numberOfPlayer		db	?
TypeOfMidi		db	0
Instructions		db	0
StartGame		db	0

Game Variables

mainExitFlag		db	0
TileNum			db	?
menu				db	'menu2.pcx', 0	;filename of pcx file

Constants

TileLength		db	16
TileWidth		db	16
MaxDamage		db	5
minDamage		db	0
gunDamage		db	1
GernadeDamage		db	3
hMissileDamage		db	3
PowerDamage		db	5
minHealth		db	0
maxHealth		db	10
worldWidth		db	1400	;the total world width in pixels
worldHeight		db	1000	;the total world height in pixels
ownWorldWidth		db	260	;each players screen width
ownWorldHeight		db	200	;each players screen height

GENERAL FUNCTIONS;******Game Engine**********************
;Written by Jimmy Chen

SHOWPCX PROC NEAR
;displays the pcx file directly on the Screen-videoseg
;input- Dx, offset of the pcx file name
;output-none(variable wise)
;written by Jimmy Chen-copied 99% from lab manuel

MouseMove PROC NEAR
;purpose-checks which menu label was clicked on
;inputs-None
;outpust-MenuStatusFlag
;written by Jimmy Chen


pickMidi PROC NEAR
;written by Jimmy Chen
;Purpose play, stop the midi that you chose
;input-mouse clicks
;outPut-None

KbdInstall PROC NEAR
;written by Jimmy Chen
;input- None
;output-None
;Purpose-telling the interrupt to now call my own keyboard handler rather than the default.



KbdUninstall PROC NEAR
;Purpose-reintall the old keyboardhandler
;input-None
;outPut-None
;Written by Jimmy Chen


KbdHandler PROC far
;purpose-taking control over keypress via scan codes
;Input-dirStatus, TabFlag, fireStatus, shiftWeapon
;Written by Jimmy Chen


ChangeMidi proc near
;Purpose- flip-flop between a set of midis
;input- MidiNumber
;outPut- Midis being played
;Written by Jimmy Chen

; ****InstTimer****
; Saves default interrrupt vector in OLDTimerV.
; Points the timer interrupt to MyTimerHandler.
; Configures timer chip to send a signal 72 times per second
;Written by Jimmy Chen with get help from Mike-TA



; ****deInstTimer*****
; Restores OldTimerV as the default timer routine.
; Reconfigures the timer chip to send a signal 18 times per second.
;Inputs: OldTimerV
; Outputs: none
;Written by Jimmy Chen with great help from mike_TA

MyTimerHandler Proc far
;Written by Jimmy Chen with great help from mike-TA
;Purpose to take control of the timer myself

;inputs: None

;outPut; None

movePlayer proc near
;Purpose- update the position of the player
;input- dirStatus
;outPut- Player1.pos_x, Player.pos_y
;written by Jimmy Chen



moveProjectile Proc near
;purpose-calculate the new projectile's location if a shot was fired
;input-player1.(bullet ptr gun).pos_x, player1.(bullet ptr gun).pos_y, player1.(bullet ptr gun).angle
;outPut- new bullet positions
;Written by Jimmy Chen



moveProjectile2 Proc near

;Purpose-update the projectile location of player2
;input-player2.(bullet ptr gun).pos_x, player2.(bullet ptr gun).pos_y, player2.(bullet ptr gun).angle
;outPut- new bullet positions
;Written by Jimmy Chen


moveProjectile3 Proc near
;Purpose-update the projectiles position of player3
;input-player3.(bullet ptr gun).pos_x, player3.(bullet ptr gun).pos_y, player3.(bullet ptr gun).angle
;outPut- new bullet positions
;Written by Jimmy Chen

checkBulletOFB proc near
;purpose to see if the bullet is out of bound
;input- player1.(bullet ptr gun).pos_x, player1.(bullet ptr gun).pos_y
;output- showWeapon
;Written by Jimmy Chen



CheckPlayerOFB proc near
;purpose check if the palyer is out of bound
;input- player1.pos_x, player1.pos_y, player1.angle
;output- keep current position if out of bound
;Written by Jimmy Chen

CheckPlayerCollision proc near
;purpose- check players collison with other players and obstacles
;input- player1.pos_x, player1.pos_y, all other objects' locations
;output- playerCollisionFlag 1 if player has a collison and 0 otherwise
;uses- worldMap




checkProjectileCollision proc near
;purpose-check if my projectile hit anything
;input- player1.(bullet ptr gun).pos_x, player1.(bullet ptr gun).pos_y, and all other objects's location
;output- projectileHit= 1, 2, 4, 8, 16 corresponding the the player in the array hitted
; 0, if no player was hit and 32 if the projectile hit an obstacle other then players


stall proc near
;Purpose- it will stay in this loop until the right mouse click is pressed
;input-None
;outPut-None
;Written by Jimmy Chen

IntPlayer proc near
;Purpose initilize all variables and players
;Input-None
;outPut-a whole ton
;written by Jimmy Chen

Random PROC NEAR

;purpose-generates a random number

inputs:None

OutPuts:rndm




checkOFB proc near
;Purpose- check to see if the location that you specify is OFB
;input- AX-pos BX-ypos
;Output- isOFB
;written by Jimmy Chen