PurpleMonkeyDW

Hey! This is my very first post here so here goes. I'm working on a pong game in turbo assembler. I already have the two paddles working and stopping at the top and bottom of the screeen.

The problem I'm having is with a bouncing ball on the screen. Ok here's what I have so far:

main: mov ax, @data ;setting up the registers
mov ds, ax
mov es, ax

Beginning: mov cx, 16h

call IncColIncRow
;compare with bottom -->IncColDecRow
;compare with right -->DecColIncRow
;Compare both -->DecColDecRow


call IncColDecRow
;compare with top -->IncColIncRow
;compare with right -->DecColDecRow
;Compare both -->DecColIncRow

call DecColDecRow
;compare with top -->DecColIncRow
;compare with left -->IncColDecRow
;Compare both -->IncColIncRow

call DecColIncRow
;compare with bottom -->DecColDecRow
;compare with left -->IncColIncRow
;Compare both -->IncColDecRow

So I have 4 proceedures making the ball(a block) go in four diagonal directions, each with necessary delay, blank methods etc.
I just can't get my head around how to check if it's hitting which edge and calling the necessary proceedure without using a confusing amount of jump statements. I tried creating a new proceedure which checks the states of the ball(ie: comparing current column and row) and returning a number between 1 and 4 also but with no luck.

Can anyone suggest any sort of logic to doing this.

tempest

Variables "up" and "down" with values true and false attached to them. When it hits a boundary, the boundary that cant go anymore gets switched. And then you have a set of ifs that know what procedure to call based on these variables.

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