Apple-2-SW/BuGS
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Use macros to reduce the copy/pasted code for marking tiles as dirty. Rough out the support for body and head segments.

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This commit is contained in:
Jeremy Rand 2020-07-30 23:34:48 -04:00
parent 2b45813cbb
commit 7d7afc908d
10 changed files with 123 additions and 267 deletions
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4
BuGS.xcodeproj/project.pbxproj
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@ -87,6 +87,8 @@
9DB1505124C6875C00558B87 /* gameScorpion.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = gameScorpion.s; sourceTree = "<group>"; };
9DB1505224C7495400558B87 /* globals.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = globals.s; sourceTree = "<group>"; };
9DB1505324C9E54C00558B87 /* gameSpider.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = gameSpider.s; sourceTree = "<group>"; };
9DB1505424D3BF6C00558B87 /* gameSegments.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = gameSegments.s; sourceTree = "<group>"; };
9DB1505524D3BFCE00558B87 /* global.macros */ = {isa = PBXFileReference; lastKnownFileType = text; path = global.macros; sourceTree = "<group>"; };
9DC4D7BD24B7652100BACF4B /* ship.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = ship.s; sourceTree = "<group>"; };
9DC4D7BE24B80C9600BACF4B /* shot.s */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.asm; path = shot.s; sourceTree = "<group>"; };
9DC4D7BF24BE9F7100BACF4B /* tiles.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = tiles.h; sourceTree = "<group>"; };
@ -136,9 +138,11 @@
9DB1505024C3801100558B87 /* gameFlea.s */,
9DB1505124C6875C00558B87 /* gameScorpion.s */,
9DB1505324C9E54C00558B87 /* gameSpider.s */,
9DB1505424D3BF6C00558B87 /* gameSegments.s */,
9D62AF3B249871A300348F45 /* colour.s */,
9D2FF6DA24C4C79A000181E5 /* random.s */,
9DB1505224C7495400558B87 /* globals.s */,
9DB1505524D3BFCE00558B87 /* global.macros */,
9D3396F324AECACC003222B3 /* sprites */,
9D1716912491C49300C83148 /* main.rez */,
9D1716932491C49300C83148 /* Makefile */,

2
BuGS/Makefile
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@ -54,7 +54,7 @@ REZFLAGS+=
MACGENFLAGS+=
# Add any other macro libraries to include in this variable:
MACGENMACROS+=sprites/sprites.macros
MACGENMACROS+=sprites/sprites.macros global.macros
# Add any arguments you want passed to the assembler to this variable:
ASMFLAGS+=

4
BuGS/game.s
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@ -31,9 +31,10 @@ game start
gameLoop anop
jsl drawDirtyGameTiles
jsl drawScorpion
jsl drawSpider
jsl drawScorpion
jsl drawFlea
jsl drawSegments
jsl drawDirtyNonGameTiles
short i,m
@ -45,6 +46,7 @@ gameLoop anop
jsl updateScorpion
jsl updateSpider
jsl updateFlea
jsl updateSegments
jsl checkKeyboard
jsl waitForVbl

50
BuGS/gameFlea.s
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@ -33,53 +33,11 @@ drawFlea entry
ldy numDirtyGameTiles
ldx fleaTileOffsets
lda tiles+TILE_DIRTY_OFFSET,x
bne drawFlea_skipTile1
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
sta dirtyGameTiles,y
iny
iny
_dirtyGameTile fleaTileOffsets
_dirtyGameTile fleaTileOffsets+2
_dirtyGameTile fleaTileOffsets+4
_dirtyGameTile fleaTileOffsets+6
drawFlea_skipTile1 anop
ldx fleaTileOffsets+2
lda tiles+TILE_DIRTY_OFFSET,x
bne drawFlea_skipTile2
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
sta dirtyGameTiles,y
iny
iny
drawFlea_skipTile2 anop
ldx fleaTileOffsets+4
lda tiles+TILE_DIRTY_OFFSET,x
bne drawFlea_skipTile3
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
sta dirtyGameTiles,y
iny
iny
drawFlea_skipTile3 anop
ldx fleaTileOffsets+6
lda tiles+TILE_DIRTY_OFFSET,x
bne drawFlea_skipTile4
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
sta dirtyGameTiles,y
iny
iny
drawFlea_skipTile4 anop
sty numDirtyGameTiles
drawFlea_done anop

74
BuGS/gameScorpion.s
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@ -36,78 +36,10 @@ drawScorpion_cont anop
ldx scorpionSprite
jsl scorpionJump
ldx scorpionTileOffsets
lda tiles+TILE_DIRTY_OFFSET,x
bne drawScorpion_skipTile1
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawScorpion_nonGame1
_dirtyGameOrNonGameTile scorpionTileOffsets
_dirtyGameOrNonGameTile scorpionTileOffsets+2
_dirtyGameOrNonGameTile scorpionTileOffsets+4
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawScorpion_skipTile1
drawScorpion_nonGame1 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawScorpion_skipTile1 anop
ldx scorpionTileOffsets+2
lda tiles+TILE_DIRTY_OFFSET,x
bne drawScorpion_skipTile2
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawScorpion_nonGame2
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawScorpion_skipTile2
drawScorpion_nonGame2 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawScorpion_skipTile2 anop
ldx scorpionTileOffsets+4
lda tiles+TILE_DIRTY_OFFSET,x
bne drawScorpion_done
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawScorpion_nonGame3
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
rtl
drawScorpion_nonGame3 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawScorpion_done anop
rtl

42
BuGS/gameSegments.s Normal file
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@ -0,0 +1,42 @@
;
; gameSegments.s
; BuGS
;
; Created by Jeremy Rand on 2020-07-30.
;Copyright © 2020 Jeremy Rand. All rights reserved.
;
case on
mcopy gameSegments.macros
keep gameSegments
gameSegments start
using globalData
drawSegments entry
; Write this code...
rtl
updateSegments entry
; Write this code...
rtl
addBodySegment entry
; Write this code...
rtl
addHeadSegment entry
; Write this code...
rtl
shootSegment entry
; Write this code...
rtl
end

149
BuGS/gameSpider.s
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@ -71,150 +71,13 @@ drawSpider_cont anop
ldx spiderSprite
jsl spiderJump
ldx spiderTileOffsets
lda tiles+TILE_DIRTY_OFFSET,x
bne drawSpider_skipTile1
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawSpider_nonGame1
_dirtyGameOrNonGameTile spiderTileOffsets
_dirtyGameOrNonGameTile spiderTileOffsets+2
_dirtyGameOrNonGameTile spiderTileOffsets+4
_dirtyGameOrNonGameTile spiderTileOffsets+6
_dirtyGameOrNonGameTile spiderTileOffsets+8
_dirtyGameOrNonGameTile spiderTileOffsets+10
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawSpider_skipTile1
drawSpider_nonGame1 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawSpider_skipTile1 anop
ldx spiderTileOffsets+2
lda tiles+TILE_DIRTY_OFFSET,x
bne drawSpider_skipTile2
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawSpider_nonGame2
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawSpider_skipTile2
drawSpider_nonGame2 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawSpider_skipTile2 anop
ldx spiderTileOffsets+4
lda tiles+TILE_DIRTY_OFFSET,x
bne drawSpider_skipTile3
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawSpider_nonGame3
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawSpider_skipTile3
drawSpider_nonGame3 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawSpider_skipTile3 anop
ldx spiderTileOffsets+6
lda tiles+TILE_DIRTY_OFFSET,x
bne drawSpider_skipTile4
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawSpider_nonGame4
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawSpider_skipTile4
drawSpider_nonGame4 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawSpider_skipTile4 anop
ldx spiderTileOffsets+8
lda tiles+TILE_DIRTY_OFFSET,x
bne drawSpider_skipTile5
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawSpider_nonGame5
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra drawSpider_skipTile5
drawSpider_nonGame5 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawSpider_skipTile5 anop
ldx spiderTileOffsets+10
lda tiles+TILE_DIRTY_OFFSET,x
bne drawSpider_done
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge drawSpider_nonGame6
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
rtl
drawSpider_nonGame6 anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
drawSpider_done anop
rtl
spiderJump entry

56
BuGS/global.macros Normal file
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@ -0,0 +1,56 @@
;
; global.macros
; BuGS
;
; Created by Jeremy Rand on 2020-07-30.
;Copyright © 2020 Jeremy Rand. All rights reserved.
;
; Call this with Y already loaded with the numDirtyGameTiles. Also, the new
; numDirtyGameTiles is left in Y. The caller must store it.
macro
_dirtyGameTile &tileOffset
ldx &tileOffset
lda tiles+TILE_DIRTY_OFFSET,x
bne _dirtyGameTile_skip&SYSCNT
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
sta dirtyGameTiles,y
iny
iny
_dirtyGameTile_skip&SYSCNT anop
mend
macro
_dirtyGameOrNonGameTile &tileOffset
ldx &tileOffset
lda tiles+TILE_DIRTY_OFFSET,x
bne _dirtyGameTile_skip&SYSCNT
lda #TILE_STATE_DIRTY
sta tiles+TILE_DIRTY_OFFSET,x
txa
cmp #RHS_FIRST_TILE_OFFSET
bge _dirtyGameTile_nonGame&SYSCNT
ldy numDirtyGameTiles
sta dirtyGameTiles,y
iny
iny
sty numDirtyGameTiles
bra _dirtyGameTile_skip&SYSCNT
_dirtyGameTile_nonGame&SYSCNT anop
ldy numDirtyNonGameTiles
sta dirtyNonGameTiles,y
iny
iny
sty numDirtyNonGameTiles
_dirtyGameTile_skip&SYSCNT anop
mend

4
BuGS/sprites/sprites.macros
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@ -708,10 +708,10 @@
tax
and &mask
beq ~&SYSCNT
beq _noCollision_&SYSCNT
sta collision
~&SYSCNT anop
_noCollision_&SYSCNT anop
txa
mend

5
BuGS/sprites/sprites.md
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@ -43,10 +43,9 @@ Each colour is 4 bits wide. All zeros is always black in all the different pall
* solid squares (primarily the all black square)
These sprites generally draw first and overwrite what may have been there before. After the background layer is drawn, other things are drawn in this order:
* spiders
* spiders/scores
* scorpions
* fleas
* scores
* centipede segments
* missle
* player
@ -63,4 +62,4 @@ An exception to the "background is drawn first" rule though is the non-playable
We also need to clip a flea which is dropping down from the top. The solution there is that the game allocates memory before the SHR page, enough for an extra unseen tile above the screen. A partially obscured flea is drawn offscreen into that part of memory before the SHR page.
There is a similar problem when the flea reaches the bottom of the screen. I haven't decided how to handle this yet. After the SHR screen are the screen control bytes and the colour palettes so I can't just overwrite that memory with the off-screen flea sprite. I could maybe allow the flea to corrupt this memory and then try to repair it. Or maybe the flea sprite code will need to have special cases for the last few lines of the screen. This problem is still to be solved.
There is a similar problem when the flea reaches the bottom of the screen. I have decided to just not handle it. The flea disappears once it reaches the bottom of the screen. It does not scroll off the bottom.