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Updated comments on eat-food and self-eat detection

This commit is contained in:
giomba 2017-12-22 12:14:37 +01:00
parent e479dcb5fe
commit 53b3e700ca
1 changed files with 5 additions and 3 deletions
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8
snake.asm
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@ -310,7 +310,9 @@ overEndCheck:
ldy #0 ldy #0
; Check for food eat / wall hit (actually doing food check only) ; Check for food eat / wall hit / self-eat
; - - - - - - - - - - - - - - - - - - - - - -
; --- Food eat ---
lda snakeX ; calc head location in memory lda snakeX ; calc head location in memory
sta calcTileX sta calcTileX
lda snakeY lda snakeY
@ -318,7 +320,7 @@ overEndCheck:
jsr calcTileMem jsr calcTileMem
lda (tileMem),y ; read content of head memory location lda (tileMem),y ; read content of head memory location
cmp foodTile cmp foodTile
bne checkSelfEat ; if memory does not contain food, then skip to next test... bne checkSelfEat ; if memory does not contain food, then skip to self-eat test...
ldx length ; else, increment snake length, ldx length ; else, increment snake length,
inx inx
stx length stx length
@ -361,11 +363,11 @@ foodNoLow:
jmp checkEndSelfEat jmp checkEndSelfEat
checkEndFood: checkEndFood:
; --- Self eat ---
checkSelfEat: checkSelfEat:
cmp snakeTile cmp snakeTile
bne checkEndSelfEat bne checkEndSelfEat
jmp gameover jmp gameover
checkEndSelfEat: checkEndSelfEat:
; Draw snake head ; Draw snake head