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Code Releases Activity

No more fg_shift 2

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This commit is contained in:
alpine9000
2016-04-15 10:45:37 +10:00
parent c730d18ccc
commit abd268f18c
3 changed files with 5 additions and 4 deletions
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028.game2/constants.i
+2 -1
View File
@@ -1,7 +1,8 @@
BACKGROUND_UPDATE_COUNT equ $3
FOREGROUND_DELAY_BIT equ 0
FOREGROUND_SCROLL_SHIFT_CONVERT equ 4
FOREGROUND_SCROLL_SHIFT_CONVERT equ 1
FOREGROUND_SCROLL_PIXELS equ 2
SCREEN_WIDTH equ 320
SCREEN_HEIGHT equ 256
028.game2/game1.s
+2 -2
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@@ -41,7 +41,7 @@ Entry:
Reset:
move.l #-1,foregroundScrollX ; x pos (d1)
move.l #-FOREGROUND_SCROLL_PIXELS,foregroundScrollX ; x pos (d1)
move.l #0,fg_tileIndex ; tile index (d3)
move.l #0,backgroundScrollX
move.l #0,bg_shift ; shift counter (d2)
@@ -94,7 +94,7 @@ Update:
bge .skip
add.l #2,fg_tileIndex ; increment foreground tile index
.skip:
add.l #16,foregroundScrollX
add.l #FOREGROUND_SCROLL_PIXELS,foregroundScrollX
.skipForegroundUpdates:
add.l #1,frameCount
028.game2/image.s
+1 -1
View File
@@ -6,7 +6,7 @@ SwitchBuffers:
;; offscreen - bitplane address
move.l foregroundScrollX,d0
lsr.l #4,d0 ; convert to pixels
lsr.l #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
lsr.l #3,d0 ; bytes to scroll
move.l foregroundOffscreen,a0
move.l foregroundOnscreen,foregroundOffscreen