mirror of https://git.sr.ht/~rabbits/uxn
70 lines
1.6 KiB
Plaintext
70 lines
1.6 KiB
Plaintext
( Screen )
|
|
|
|
;center { x 2 y 2 }
|
|
;timer { byte 1 }
|
|
|
|
|0100 @RESET
|
|
|
|
( find screen center )
|
|
~Screen.width #0002 DIV2 =center.x
|
|
~Screen.height #0002 DIV2 =center.y
|
|
|
|
( draw hor line )
|
|
#0000 =Screen.x ~center.y =Screen.y
|
|
#0000 ~Screen.width ( from/to )
|
|
$draw-hor NOP
|
|
( draw ) #01 =Screen.color
|
|
( incr ) SWP2 #0002 ADD2 DUP2 =Screen.x SWP2
|
|
OVR2 OVR2 LTH2 ^$draw-hor SWP JMPS? POP
|
|
POP2 POP2
|
|
|
|
( draw ver line )
|
|
~center.x =Screen.x #0000 =Screen.y
|
|
#0000 ~Screen.height ( from/to )
|
|
$draw-ver NOP
|
|
( draw ) #02 =Screen.color
|
|
( incr ) SWP2 #0002 ADD2 DUP2 =Screen.y SWP2
|
|
OVR2 OVR2 LTH2 ^$draw-ver SWP JMPS? POP
|
|
POP2 POP2
|
|
|
|
( draw blending modes )
|
|
#0020 =Sprite.x #0020 =Sprite.y ,icon =Sprite.addr
|
|
#00 #10
|
|
$draw-blends NOP
|
|
( move ) OVR #00 SWP #0008 MUL2 #0020 ADD2 =Sprite.x
|
|
( draw ) OVR =Sprite.color
|
|
( incr ) SWP #01 ADD SWP
|
|
DUP2 LTH ^$draw-blends SWP JMPS? POP
|
|
POP POP
|
|
|
|
BRK
|
|
|
|
@FRAME
|
|
|
|
( update colors every 40 frames )
|
|
~timer #40 NEQ ,skip1 ROT JMP2? POP2
|
|
#0fac #fffa STR2 #f0bb #fffc STR2 #f053 #fff8 STR2
|
|
@skip1
|
|
~timer #80 NEQ ,skip2 ROT JMP2? POP2
|
|
#00fc #fffc STR2 #f0bb #fff8 STR2 #f053 #fffa STR2
|
|
@skip2
|
|
~timer #c0 NEQ ,skip3 ROT JMP2? POP2
|
|
#000f #fff8 STR2 #0f0f #fffa STR2 #ff00 #fffc STR2
|
|
@skip3
|
|
~timer #00 NEQ ,skip4 ROT JMP2? POP2
|
|
#f0ac #fff8 STR2 #f0bb #fffa STR2 #f053 #fffc STR2
|
|
@skip4
|
|
~timer #01 ADD =timer
|
|
|
|
BRK
|
|
|
|
@icon [ 3c7e e7c3 c3e7 7e3c ]
|
|
|
|
|d000 @ERROR BRK
|
|
|
|
|FF10 ;Screen { width 2 height 2 pad 4 x 2 y 2 color 1 }
|
|
|FF20 ;Sprite { pad 8 x 2 y 2 addr 2 color 1 }
|
|
|
|
|FFF0 .RESET .FRAME .ERROR ( vectors )
|
|
|FFF8 [ f0ac f0bb f053 ] ( palette )
|