Add horizontal scaling to the background rotation
This commit is contained in:
Lucas Scharenbroich
parent
f7eb80f2fe
commit
18da2546bd
|
|
@ -50,6 +50,7 @@ LastHFlip equ 48
|
|||
SpriteFrame equ 50
|
||||
SpriteToggle equ 52
|
||||
SpriteCount equ 54
|
||||
Scale equ 56
|
||||
|
||||
phk
|
||||
plb
|
||||
|
|
@ -72,6 +73,7 @@ SpriteCount equ 54
|
|||
stz LastHFlip
|
||||
stz SpriteCount
|
||||
stz SpriteToggle
|
||||
stz Scale
|
||||
|
||||
; Initialize the graphics screen playfield
|
||||
|
||||
|
|
@ -205,6 +207,17 @@ EvtLoop
|
|||
jsr handle_a
|
||||
pla
|
||||
:no_a
|
||||
bit #PAD_KEY_DOWN
|
||||
beq :reg_key
|
||||
and #$007F
|
||||
cmp #'s'
|
||||
bne :reg_key
|
||||
inc Scale
|
||||
pei Scale
|
||||
_GTESetBG1Scale
|
||||
jmp do_render
|
||||
|
||||
:reg_key
|
||||
and #$007F
|
||||
cmp #LEFT_ARROW
|
||||
bne *+5
|
||||
|
|
|
|||
|
|
@ -120,6 +120,12 @@ _GTESetBG1Displacement MAC
|
|||
_GTESetBG1Rotation MAC
|
||||
UserTool $2900+GTEToolNum
|
||||
<<<
|
||||
_GTEClearBG1Buffer MAC
|
||||
UserTool $2A00+GTEToolNum
|
||||
<<<
|
||||
_GTESetBG1Scale MAC
|
||||
UserTool $2B00+GTEToolNum
|
||||
<<<
|
||||
|
||||
; EngineMode definitions
|
||||
; Script definition
|
||||
|
|
@ -145,6 +151,7 @@ ENGINE_MODE_BNK0_BUFF equ $0004
|
|||
RENDER_ALT_BG1 equ $0001
|
||||
RENDER_BG1_HORZ_OFFSET equ $0002
|
||||
RENDER_BG1_VERT_OFFSET equ $0004
|
||||
RENDER_BG1_ROTATION equ $0008
|
||||
|
||||
; Tile constants
|
||||
; TILE_RESERVED_BIT equ $8000
|
||||
|
|
|
|||
|
|
@ -98,7 +98,7 @@ LastTick equ 118
|
|||
ForceSpriteFlag equ 120
|
||||
SpriteRemovedFlag equ 122 ; Indicate if any sprites were removed this frame
|
||||
RenderFlags equ 124 ; Flags passed to the Render() function
|
||||
|
||||
BG1Scaling equ 126
|
||||
|
||||
activeSpriteList equ 128 ; 32 bytes for the active sprite list (can persist across frames)
|
||||
; tiletmp equ 178 ; 16 bytes of temp storage for the tile renderers
|
||||
|
|
@ -170,6 +170,7 @@ ENGINE_MODE_BNK0_BUFF equ $0004
|
|||
RENDER_ALT_BG1 equ $0001
|
||||
RENDER_BG1_HORZ_OFFSET equ $0002
|
||||
RENDER_BG1_VERT_OFFSET equ $0004
|
||||
RENDER_BG1_ROTATION equ $0008
|
||||
|
||||
; DirtyBits definitions
|
||||
DIRTY_BIT_BG0_X equ $0001
|
||||
|
|
@ -263,6 +264,7 @@ VBuffVertTableSelect EXT
|
|||
VBuffHorzTableSelect EXT
|
||||
Overlays EXT
|
||||
BG1YCache EXT
|
||||
ScalingTables EXT
|
||||
|
||||
; Tool error codes
|
||||
NO_TIMERS_AVAILABLE equ 10
|
||||
|
|
|
|||
16
src/Render.s
16
src/Render.s
|
|
@ -33,10 +33,16 @@ _Render
|
|||
stz SpriteRemovedFlag ; If we remove a sprite, then we need to flag a rebuild for the next frame
|
||||
|
||||
jsr _ApplyBG0YPos ; Set stack addresses for the virtual lines to the physical screen
|
||||
; jsr _ApplyBG1YPos
|
||||
|
||||
lda #RENDER_BG1_ROTATION
|
||||
bit RenderFlags
|
||||
bne :skip_bg1_y
|
||||
jsr _ApplyBG1YPos ; Set the y-register values of the blitter
|
||||
:skip_bg1_y
|
||||
|
||||
; _ApplyBG0Xpos need to be split because we have to set the offsets, then draw in any updated tiles, and
|
||||
; finally patch out the code field. Right now, the BRA operand is getting overwritten by tile data.
|
||||
|
||||
jsr _ApplyBG0XPosPre
|
||||
jsr _ApplyBG1XPosPre
|
||||
|
||||
|
|
@ -47,8 +53,12 @@ _Render
|
|||
|
||||
jsr _ApplyTiles ; This function actually draws the new tiles into the code field
|
||||
|
||||
jsr _ApplyBG0XPos ; Patch the code field instructions with exit BRA opcode
|
||||
; jsr _ApplyBG1XPos ; Update the direct page value based on the horizontal position
|
||||
jsr _ApplyBG0XPos ; Patch the code field instructions with exit BRA opcode
|
||||
lda #RENDER_BG1_ROTATION
|
||||
bit RenderFlags
|
||||
bne :skip_bg1_x
|
||||
jsr _ApplyBG1XPos ; Update the direct page value based on the horizontal position
|
||||
:skip_bg1_x
|
||||
|
||||
; The code fields are locked in now and ready to be rendered. See if there is an overlay or any
|
||||
; other reason to render with shadowing off. Otherwise, just do things quickly.
|
||||
|
|
|
|||
17
src/Tool.s
17
src/Tool.s
|
|
@ -93,6 +93,9 @@ _CallTable
|
|||
adrl _TSRenderDirty-1
|
||||
adrl _TSSetBG1Displacement-1
|
||||
adrl _TSSetBG1Rotation-1
|
||||
|
||||
adrl _TSClearBG1Buffer-1
|
||||
adrl _TSSetBG1Scale-1
|
||||
_CTEnd
|
||||
_GTEAddSprite MAC
|
||||
UserTool $1000+GTEToolNum
|
||||
|
|
@ -775,6 +778,20 @@ y_angles EXT
|
|||
|
||||
_TSExit #0;#2
|
||||
|
||||
_TSClearBG1Buffer
|
||||
:value equ FirstParam+0
|
||||
_TSEntry
|
||||
lda :value,s
|
||||
jsr _ClearBG1Buffer
|
||||
_TSExit #0;#2
|
||||
|
||||
_TSSetBG1Scale
|
||||
:sIndex equ FirstParam+0
|
||||
_TSEntry
|
||||
lda :value,s
|
||||
sta BG1Scaling
|
||||
_TSExit #0;#2
|
||||
|
||||
; Insert the GTE code
|
||||
|
||||
put Math.s
|
||||
|
|
|
|||
|
|
@ -11,20 +11,29 @@
|
|||
|
||||
ANGLEBNK EXT
|
||||
_ApplyBG1XPosAngle
|
||||
:ptr equ $FC
|
||||
:stbl equ $FA
|
||||
phd ; save the direct page because we are going to switch to the
|
||||
lda BlitterDP ; blitter direct page space and fill in the addresses
|
||||
tcd
|
||||
pei BlitterDP ; blitter direct page space and fill in the addresses
|
||||
lda BG1Scaling
|
||||
pld
|
||||
|
||||
and #$000F
|
||||
asl
|
||||
tax
|
||||
lda ScalingTables,x
|
||||
sta :stbl
|
||||
|
||||
lda #^ANGLEBNK
|
||||
sta $fe
|
||||
sty $fc ; Store in the new direct page
|
||||
ldy #162
|
||||
tyx
|
||||
sta :ptr+2
|
||||
sty :ptr ; Store in the new direct page
|
||||
ldx #162
|
||||
:loop
|
||||
lda [$fc],y
|
||||
sta 00,x ; store the value
|
||||
dey
|
||||
dey
|
||||
txy
|
||||
lda (:stbl),y ; Map the through the scaling factor
|
||||
tay
|
||||
lda [:ptr],y ; Load the underlying value
|
||||
sta 00,x ; store the value
|
||||
dex
|
||||
dex
|
||||
bpl :loop
|
||||
|
|
@ -37,9 +46,17 @@ _ApplyBG1YPosAngle
|
|||
:draw_count equ tmp2
|
||||
:ytbl_idx equ tmp3
|
||||
:angle_tbl equ tmp4
|
||||
:scale_ptr equ tmp5
|
||||
|
||||
sty :angle_tbl
|
||||
|
||||
lda BG1Scaling ; Set the scaling table
|
||||
and #$0007
|
||||
asl
|
||||
tax
|
||||
lda ScalingTables,x
|
||||
sta :scale_ptr
|
||||
|
||||
lda BG1StartYMod208
|
||||
sta :ytbl_idx ; Start copying from the first entry in the table
|
||||
|
||||
|
|
@ -49,6 +66,10 @@ _ApplyBG1YPosAngle
|
|||
lda ScreenHeight
|
||||
sta :lines_left
|
||||
|
||||
; Copy out the y-values from the rotation table into a temporary buffer
|
||||
|
||||
; Copy the rotation values into the code fields
|
||||
|
||||
phb
|
||||
:loop
|
||||
lda :virt_line
|
||||
|
|
@ -111,13 +132,23 @@ _ApplyBG1YPosAngle
|
|||
; Y = starting line * $1000
|
||||
; X = number of lines (x2)
|
||||
CopyAngleYTableToBG1Addr
|
||||
|
||||
:ptr equ $FC
|
||||
:stbl equ $FA
|
||||
; tax
|
||||
; ldal ANGLEBNK+XX,x
|
||||
; sta BG1_ADDR+$F000,y
|
||||
phy ; save y; used when writing
|
||||
phx
|
||||
|
||||
; Scale the mapping
|
||||
tay
|
||||
|
||||
|
||||
|
||||
|
||||
jsr SaveBG1AngleValues
|
||||
plx ; x is used directly in this routine
|
||||
ply
|
||||
jmp ApplyBG1OffsetValues
|
||||
|
||||
SaveBG1AngleValues
|
||||
|
|
|
|||
|
|
@ -375,9 +375,6 @@ BG1YTable ENT
|
|||
]step = ]step+256
|
||||
--^
|
||||
|
||||
BG1YCache ENT
|
||||
ds 32
|
||||
|
||||
; Repeat
|
||||
BG1YOffsetTable ENT
|
||||
lup 2
|
||||
|
|
@ -512,5 +509,30 @@ _stamp_step ENT
|
|||
|
||||
BG1YCache ENT
|
||||
ds 32
|
||||
|
||||
; Scaling tables for the BG1 rotation tables.
|
||||
ScalingTables ENT
|
||||
dw Scale0,Scale1,Scale2,Scale3
|
||||
dw Scale4,Scale5,Scale6,Scale7
|
||||
dw Scale8,Scale9,Scale10,Scale11
|
||||
dw Scale12,Scale13,Scale14,Scale15
|
||||
|
||||
Scale0 dw $0050,$0054,$0058,$005C,$0060,$0064,$0068,$006C,$0070,$0074,$0078,$007C,$0080,$0084,$0088,$008C,$0090,$0094,$0098,$009C,$00A0,$0002,$0006,$000A,$000E,$0012,$0016,$001A,$001E,$0022,$0026,$002A,$002E,$0032,$0036,$003A,$003E,$0042,$0046,$004A,$004E,$0052,$0056,$005A,$005E,$0062,$0066,$006A,$006E,$0072,$0076,$007A,$007E,$0082,$0086,$008A,$008E,$0092,$0096,$009A,$009E,$00A2,$0004,$0008,$000C,$0010,$0014,$0018,$001C,$0020,$0024,$0028,$002C,$0030,$0034,$0038,$003C,$0040,$0044,$0048,$004C,$0050
|
||||
Scale1 dw $0072,$0074,$0078,$007A,$007E,$0082,$0084,$0088,$008A,$008E,$0092,$0094,$0098,$009A,$009E,$0000,$0002,$0006,$0008,$000C,$000E,$0012,$0016,$0018,$001C,$001E,$0022,$0026,$0028,$002C,$002E,$0032,$0036,$0038,$003C,$003E,$0042,$0044,$0048,$004C,$004E,$0052,$0054,$0058,$005C,$005E,$0062,$0064,$0068,$006A,$006E,$0072,$0074,$0078,$007A,$007E,$0082,$0084,$0088,$008A,$008E,$0092,$0094,$0098,$009A,$009E,$00A0,$0002,$0006,$0008,$000C,$000E,$0012,$0016,$0018,$001C,$001E,$0022,$0026,$0028,$002C,$002E
|
||||
Scale2 dw $0086,$0088,$008C,$008E,$0090,$0094,$0096,$0098,$009C,$009E,$00A0,$0002,$0004,$0006,$000A,$000C,$000E,$0012,$0014,$0016,$001A,$001C,$001E,$0022,$0024,$0026,$002A,$002C,$002E,$0032,$0034,$0036,$003A,$003C,$003E,$0042,$0044,$0046,$004A,$004C,$004E,$0052,$0054,$0056,$005A,$005C,$005E,$0062,$0064,$0066,$006A,$006C,$006E,$0072,$0074,$0076,$007A,$007C,$007E,$0082,$0084,$0086,$008A,$008C,$008E,$0092,$0094,$0096,$009A,$009C,$009E,$00A2,$0002,$0004,$0008,$000A,$000C,$0010,$0012,$0014,$0018,$001A
|
||||
Scale3 dw $0094,$0098,$009A,$009C,$009E,$00A0,$0000,$0002,$0006,$0008,$000A,$000C,$000E,$0010,$0014,$0016,$0018,$001A,$001C,$001E,$0020,$0024,$0026,$0028,$002A,$002C,$002E,$0030,$0034,$0036,$0038,$003A,$003C,$003E,$0042,$0044,$0046,$0048,$004A,$004C,$004E,$0052,$0054,$0056,$0058,$005A,$005C,$005E,$0062,$0064,$0066,$0068,$006A,$006C,$0070,$0072,$0074,$0076,$0078,$007A,$007C,$0080,$0082,$0084,$0086,$0088,$008A,$008C,$0090,$0092,$0094,$0096,$0098,$009A,$009E,$00A0,$00A2,$0002,$0004,$0006,$0008,$000C
|
||||
Scale4 dw $0000,$0002,$0004,$0006,$0008,$000A,$000C,$000E,$0010,$0012,$0014,$0016,$0018,$001A,$001C,$001E,$0020,$0022,$0024,$0026,$0028,$002A,$002C,$002E,$0030,$0032,$0034,$0036,$0038,$003A,$003C,$003E,$0040,$0042,$0044,$0046,$0048,$004A,$004C,$004E,$0050,$0052,$0054,$0056,$0058,$005A,$005C,$005E,$0060,$0062,$0064,$0066,$0068,$006A,$006C,$006E,$0070,$0072,$0074,$0076,$0078,$007A,$007C,$007E,$0080,$0082,$0084,$0086,$0088,$008A,$008C,$008E,$0090,$0092,$0094,$0096,$0098,$009A,$009C,$009E,$00A0,$00A2
|
||||
Scale5 dw $0008,$000A,$000C,$000E,$0010,$0010,$0012,$0014,$0016,$0018,$001A,$001C,$001E,$0020,$0020,$0022,$0024,$0026,$0028,$002A,$002C,$002E,$0030,$0030,$0032,$0034,$0036,$0038,$003A,$003C,$003E,$0040,$0040,$0042,$0044,$0046,$0048,$004A,$004C,$004E,$0050,$0050,$0052,$0054,$0056,$0058,$005A,$005C,$005E,$0060,$0060,$0062,$0064,$0066,$0068,$006A,$006C,$006E,$0070,$0070,$0072,$0074,$0076,$0078,$007A,$007C,$007E,$0080,$0080,$0082,$0084,$0086,$0088,$008A,$008C,$008E,$0090,$0090,$0092,$0094,$0096,$0098
|
||||
Scale6 dw $0010,$0010,$0012,$0014,$0016,$0018,$0018,$001A,$001C,$001E,$0020,$0020,$0022,$0024,$0026,$0028,$0028,$002A,$002C,$002E,$0030,$0030,$0032,$0034,$0036,$0038,$0038,$003A,$003C,$003E,$0040,$0040,$0042,$0044,$0046,$0048,$0048,$004A,$004C,$004E,$0050,$0050,$0052,$0054,$0056,$0058,$0058,$005A,$005C,$005E,$0060,$0060,$0062,$0064,$0066,$0068,$0068,$006A,$006C,$006E,$0070,$0070,$0072,$0074,$0076,$0078,$0078,$007A,$007C,$007E,$0080,$0080,$0082,$0084,$0086,$0088,$0088,$008A,$008C,$008E,$0090,$0090
|
||||
Scale7 dw $0016,$0016,$0018,$001A,$001A,$001C,$001E,$0020,$0020,$0022,$0024,$0026,$0026,$0028,$002A,$002A,$002C,$002E,$0030,$0030,$0032,$0034,$0036,$0036,$0038,$003A,$003A,$003C,$003E,$0040,$0040,$0042,$0044,$0046,$0046,$0048,$004A,$004A,$004C,$004E,$0050,$0050,$0052,$0054,$0056,$0056,$0058,$005A,$005A,$005C,$005E,$0060,$0060,$0062,$0064,$0066,$0066,$0068,$006A,$006A,$006C,$006E,$0070,$0070,$0072,$0074,$0076,$0076,$0078,$007A,$007A,$007C,$007E,$0080,$0080,$0082,$0084,$0086,$0086,$0088,$008A,$008A
|
||||
Scale8 dw $001A,$001C,$001C,$001E,$0020,$0020,$0022,$0024,$0024,$0026,$0028,$0028,$002A,$002C,$002C,$002E,$0030,$0030,$0032,$0034,$0034,$0036,$0038,$0038,$003A,$003C,$003C,$003E,$0040,$0040,$0042,$0044,$0044,$0046,$0048,$0048,$004A,$004C,$004C,$004E,$0050,$0050,$0052,$0054,$0054,$0056,$0058,$0058,$005A,$005C,$005C,$005E,$0060,$0060,$0062,$0064,$0064,$0066,$0068,$0068,$006A,$006C,$006C,$006E,$0070,$0070,$0072,$0074,$0074,$0076,$0078,$0078,$007A,$007C,$007C,$007E,$0080,$0080,$0082,$0084,$0084,$0086
|
||||
Scale9 dw $0020,$0020,$0022,$0022,$0024,$0026,$0026,$0028,$0028,$002A,$002C,$002C,$002E,$002E,$0030,$0032,$0032,$0034,$0034,$0036,$0038,$0038,$003A,$003A,$003C,$003E,$003E,$0040,$0040,$0042,$0044,$0044,$0046,$0046,$0048,$004A,$004A,$004C,$004C,$004E,$0050,$0050,$0052,$0054,$0054,$0056,$0056,$0058,$005A,$005A,$005C,$005C,$005E,$0060,$0060,$0062,$0062,$0064,$0066,$0066,$0068,$0068,$006A,$006C,$006C,$006E,$006E,$0070,$0072,$0072,$0074,$0074,$0076,$0078,$0078,$007A,$007A,$007C,$007E,$007E,$0080,$0080
|
||||
Scale10 dw $0024,$0024,$0026,$0028,$0028,$002A,$002A,$002C,$002C,$002E,$002E,$0030,$0030,$0032,$0034,$0034,$0036,$0036,$0038,$0038,$003A,$003A,$003C,$003C,$003E,$0040,$0040,$0042,$0042,$0044,$0044,$0046,$0046,$0048,$0048,$004A,$004C,$004C,$004E,$004E,$0050,$0050,$0052,$0052,$0054,$0054,$0056,$0058,$0058,$005A,$005A,$005C,$005C,$005E,$005E,$0060,$0060,$0062,$0064,$0064,$0066,$0066,$0068,$0068,$006A,$006A,$006C,$006C,$006E,$0070,$0070,$0072,$0072,$0074,$0074,$0076,$0076,$0078,$0078,$007A,$007C,$007C
|
||||
Scale11 dw $0028,$0028,$002A,$002A,$002C,$002C,$002E,$002E,$0030,$0030,$0032,$0032,$0034,$0034,$0036,$0036,$0038,$0038,$003A,$003A,$003C,$003C,$003E,$003E,$0040,$0040,$0042,$0042,$0044,$0044,$0046,$0046,$0048,$0048,$004A,$004A,$004C,$004C,$004E,$004E,$0050,$0050,$0052,$0052,$0054,$0054,$0056,$0056,$0058,$0058,$005A,$005A,$005C,$005C,$005E,$005E,$0060,$0060,$0062,$0062,$0064,$0064,$0066,$0066,$0068,$0068,$006A,$006A,$006C,$006C,$006E,$006E,$0070,$0070,$0072,$0072,$0074,$0074,$0076,$0076,$0078,$0078
|
||||
Scale12 dw $0030,$0030,$0032,$0032,$0032,$0034,$0034,$0036,$0036,$0036,$0038,$0038,$003A,$003A,$003A,$003C,$003C,$003E,$003E,$003E,$0040,$0040,$0042,$0042,$0042,$0044,$0044,$0046,$0046,$0046,$0048,$0048,$004A,$004A,$004A,$004C,$004C,$004E,$004E,$004E,$0050,$0050,$0052,$0052,$0052,$0054,$0054,$0056,$0056,$0056,$0058,$0058,$005A,$005A,$005A,$005C,$005C,$005E,$005E,$005E,$0060,$0060,$0062,$0062,$0062,$0064,$0064,$0066,$0066,$0066,$0068,$0068,$006A,$006A,$006A,$006C,$006C,$006E,$006E,$006E,$0070,$0070
|
||||
Scale13 dw $0036,$0036,$0036,$0038,$0038,$0038,$003A,$003A,$003A,$003C,$003C,$003C,$003E,$003E,$003E,$0040,$0040,$0040,$0042,$0042,$0042,$0044,$0044,$0044,$0046,$0046,$0046,$0048,$0048,$0048,$004A,$004A,$004A,$004C,$004C,$004C,$004E,$004E,$004E,$0050,$0050,$0050,$0052,$0052,$0052,$0054,$0054,$0054,$0056,$0056,$0056,$0058,$0058,$0058,$005A,$005A,$005A,$005C,$005C,$005C,$005E,$005E,$005E,$0060,$0060,$0060,$0062,$0062,$0062,$0064,$0064,$0064,$0066,$0066,$0066,$0068,$0068,$0068,$006A,$006A,$006A,$006C
|
||||
Scale14 dw $0038,$003A,$003A,$003A,$003C,$003C,$003C,$003C,$003E,$003E,$003E,$0040,$0040,$0040,$0040,$0042,$0042,$0042,$0044,$0044,$0044,$0044,$0046,$0046,$0046,$0048,$0048,$0048,$0048,$004A,$004A,$004A,$004C,$004C,$004C,$004C,$004E,$004E,$004E,$0050,$0050,$0050,$0050,$0052,$0052,$0052,$0054,$0054,$0054,$0054,$0056,$0056,$0056,$0058,$0058,$0058,$0058,$005A,$005A,$005A,$005C,$005C,$005C,$005C,$005E,$005E,$005E,$0060,$0060,$0060,$0060,$0062,$0062,$0062,$0064,$0064,$0064,$0064,$0066,$0066,$0066,$0068
|
||||
Scale15 dw $003C,$003C,$003C,$003E,$003E,$003E,$003E,$0040,$0040,$0040,$0040,$0042,$0042,$0042,$0042,$0044,$0044,$0044,$0044,$0046,$0046,$0046,$0046,$0048,$0048,$0048,$0048,$004A,$004A,$004A,$004A,$004C,$004C,$004C,$004C,$004E,$004E,$004E,$004E,$0050,$0050,$0050,$0050,$0052,$0052,$0052,$0052,$0054,$0054,$0054,$0054,$0056,$0056,$0056,$0056,$0058,$0058,$0058,$0058,$005A,$005A,$005A,$005A,$005C,$005C,$005C,$005C,$005E,$005E,$005E,$005E,$0060,$0060,$0060,$0060,$0062,$0062,$0062,$0062,$0064,$0064,$0064
|
||||
|
||||
blt_return
|
||||
stk_save
|
||||
|
|
@ -0,0 +1,50 @@
|
|||
/**
|
||||
* Generated data tables for BG1 scaling
|
||||
*/
|
||||
const RATIOS = [0.5, 0.63, 0.75, 0.87, 1.0, 1.125, 1.25, 1.375, 1.5, 1.66, 1.83, 2.0, 2.5, 3.0, 3.5, 4.0];
|
||||
const NUM_SCALES = RATIOS.length;
|
||||
|
||||
main(process.argv.slice(2)).then(
|
||||
() => process.exit(0),
|
||||
(e) => {
|
||||
console.error(e);
|
||||
process.exit(1);
|
||||
}
|
||||
);
|
||||
|
||||
function toHex(n) {
|
||||
return '$' + n.toString(16).toUpperCase().padStart(4, '0');
|
||||
}
|
||||
|
||||
async function main(argv) {
|
||||
|
||||
const _ = console.log;
|
||||
|
||||
for (let i = 0; i < NUM_SCALES; i += 1) {
|
||||
const arr = gen_scale_table(RATIOS[i]).map(n => toHex(n)).join(',');
|
||||
_(`Scale${i} dw ${arr}`);
|
||||
}
|
||||
}
|
||||
|
||||
function gen_scale_table(ratio) {
|
||||
// Take a bunch of values from 0 to 162 (82 total). Use the middle as a reference
|
||||
// and scale out based on the (inverse) ratio, e.g. a ratio of 2 will double the pixels
|
||||
const ref = Array.from({ length: 82 }, (_, i) => i * 2);
|
||||
const center = 40.5;
|
||||
const factor = 1. / ratio;
|
||||
|
||||
const table = [];
|
||||
for (let i = 0; i < 82; i++) {
|
||||
|
||||
let index = 2 * Math.floor(center + (factor * (i - center)));
|
||||
while (index < 0) {
|
||||
index += 162;
|
||||
}
|
||||
while (index > 162) {
|
||||
index -= 162;
|
||||
}
|
||||
table.push(index);
|
||||
}
|
||||
|
||||
return table;
|
||||
}
|
||||
Loading…
Reference in New Issue