Apple-2-SW/lawless-legends
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Fix edge detection in II raycaster.

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This commit is contained in:
Martin Haye 2014-05-30 09:10:20 -07:00
parent c8d8c22478
commit bbac1ea183
2 changed files with 22 additions and 9 deletions
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4
Platform/Apple/tools/PackPartitions/src/org/demo/PackPartitions.groovy
View File

@ -440,7 +440,7 @@ class PackPartitions
buf.put((byte)0)
// Sentinel row of $FF at start of map
(0..width).each { buf.put((byte)0xFF) }
(0..<width).each { buf.put((byte)0xFF) }
// After the header comes the raw data
rows.each { row ->
@ -451,7 +451,7 @@ class PackPartitions
}
// Sentinel row of $FF at end of map
(0..width).each { buf.put((byte)0xFF) }
(0..<width).each { buf.put((byte)0xFF) }
if (javascriptOut)
dumpJsMap(rows, texMap)

27
Platform/Apple/virtual/src/raycast/render.s
View File

@ -405,6 +405,8 @@ castRay: !zone
!if DEBUG >= 2 { jsr .debugFinal }
rts
.hitSprite:
cmp #$FF ; check for special mark at edges of map
beq .hitEdge
; We found a sprite cell on the map. We only want to process this sprite once,
; so check if we've already done it.
and #$40
@ -446,6 +448,16 @@ castRay: !zone
.spriteDone:
jmp .DDA_step ; trace this ray some more
; special case: hit edge of map
.hitEdge:
ldy #0 ; height
lda #1 ; depth
sty txNum ; texture number
jsr saveLink ; allocate a link and save those
lda #0 ; column number
sta txColBuf,x ; save that too
rts ; all done
; wall calculation: X=dir1, Y=dir2, A=dir2step
.wallCalc:
pha ; save step
@ -1161,16 +1173,17 @@ nextLine: !zone
.done: stx pLine+1
rts
; Draw a ray that was traversed by calcRay
; Draw a ray that was traversed by castRay
drawRay: !zone
ldy screenCol
ldx firstLink,y
.lup: lda txNumBuf,x
.lup: lda heightBuf,x
beq .skip
sta lineCt
lda txNumBuf,x
sta txNum
lda txColBuf,x
sta txColumn
lda heightBuf,x
sta lineCt
lda linkBuf,x ; get link to next stacked data to draw
pha ; save link for later
; Make a pointer to the selected texture
@ -1191,7 +1204,7 @@ drawRay: !zone
pla ; retrieve link to next in stack
tax ; put in X for indexing
bne .lup ; if non-zero, we have more to draw
rts ; next link was zero - we're done with this ray
.skip rts ; next link was zero - we're done with this ray
; Template for blitting code [ref BigBlue3_70]
blitTemplate: !zone ; comments show byte offset
@ -1574,8 +1587,8 @@ setPlayerPos: !zone
sta playerX+1
lda #$80
sta playerX
; Y=2.5
lda #2
; Y=3.5
lda #3
sta playerY+1
lda #$80
sta playerY