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uxn/examples/drag.usm
2021-02-16 12:19:48 -08:00

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( drag )
:dev/r fff8 ( std read port )
:dev/w fff9 ( std write port )
;drawx 2 ;drawy 2 ;x 2 ;y 2 ;w 2 ;h 2 ;color 1
|0100 @RESET
#05 =dev/r ( set dev/read mouse )
#01 =dev/w ( set dev/write to screen )
BRK
|c000 @FRAME
( get touch )
#04 IOR #01 NEQ ,frame-end ROT JMP? POP2
( clear )
#00 =color
~x ~y #0060 #0040 ,fillrect JSR
( fill rect x y w h )
#01 =color
#00 IOR2 ( get mouse-x ) =x
#02 IOR2 ( get mouse-y ) =y
~x ~y #0060 #0040 ,fillrect JSR
,redraw JSR
@frame-end
BRK
@fillrect
=h =w =y =x ( store values in variables )
~x =drawx ~y =drawy ( store draw pos in variables )
@fillrectrow
~x =drawx
@fillrectcol
( draw ) ~drawx ~drawy IOW2 IOW2 ~color IOW #00 IOW
~drawx #0001 ADD2 =drawx
~drawx ~w ~x ADD2 LTH2 ,fillrectcol ROT JMP? POP2
~drawy #0001 ADD2 =drawy
~drawy ~h ~y ADD2 LTH2 ,fillrectrow ROT JMP? POP2
RTS
@getmouse
#00 IOR2 ( get mouse x )
#02 IOR2 ( get mouse y )
RTS
@redraw
#0000 IOW2
#0000 IOW2
#00 IOW
#01 IOW
RTS
@clear
#0000 IOW2
#0000 IOW2
#00 IOW
#02 IOW
RTS
|d000 @ERROR BRK
|FFFA .RESET .FRAME .ERROR