A86: Missle Shooting Problems

A86: Missle Shooting Problems

• To: <assembly-86@lists.ticalc.org>
• Subject: A86: Missle Shooting Problems
• From: "Super Llama" <diddy@apci.net>
• Date: Sun, 6 Sep 1998 15:33:05 -0500
• Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
• Reply-To: assembly-86@lists.ticalc.org

Ok i am trying to make a game that lets you shoot "missles" at a little guy
moving across the screen, and this code will not work no matter what i do,
and I was wondering if anyone could help me.

Attack:
    pop bc
    call ClearSprite ;To get rid off the old missle
    ld a,b
    push bc
    add a,8
    sub 168 ;To see if its all the way to the right
    jp z,TravelAll  ;if it is clear the old one and stop moving it
    jp MissleLaunch ;otherwise move the missle

TravelAll:
    ld ix,0
    ld ix,Missle
    call PutSprite
    jp Move

MissleLaunch:
    ld a,b
    add a,8
    ld b,a
    ld ix,0
    ld ix,Missle
    call PutSprite
    jp Attack

ClearSprite:
    ld ix,0
    ld ix,Missle
    call PutSprite
    ret

This should move the missle from wherever you are on the left side of the
screen all the way to the left, but it doesn't.

I am using the PutSprite routine where "bc = xy" and ix = the current image,
any help would be appreciated thanks.

Thanks,

Super Llama

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