mirror of https://git.sr.ht/~rabbits/uxn
93 lines
2.4 KiB
Plaintext
93 lines
2.4 KiB
Plaintext
( draw routines )
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%RTN { JMP2r }
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%++ { #0001 ADD2 }
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%-- { #0001 SUB2 }
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%8+ { #0008 ADD2 }
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%ABS2 { DUP2 #000f SFT2 #ffff SWP2 SWP POP MUL2? }
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;color { byte 1 }
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;pointer { x 2 y 2 }
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;circle { xc 2 yc 2 x 2 y 2 r 2 d 2 }
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|0110 ;Screen { width 2 height 2 pad 4 x 2 y 2 color 1 }
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|0120 ;Sprite { pad 8 x 2 y 2 addr 2 color 1 }
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|0150 ;Mouse { x 2 y 2 state 1 chord 1 }
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|01F0 .RESET .FRAME .ERROR ( vectors )
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|01F8 [ 13fd 1ef3 1bf2 ] ( palette )
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|0200 @RESET
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BRK
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@FRAME
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( clear )
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~circle.xc ~circle.yc ~circle.r #00 ,draw-circle JSR2
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,draw-cursor JSR2
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~Mouse.state #00 EQU ^$no-touch JNZ
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~Mouse.x =circle.xc
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~Mouse.y =circle.yc
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#0000 =circle.r
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$no-touch
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( draw )
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~circle.xc ~circle.yc ~circle.r #0001 ADD2 #03 ,draw-circle JSR2
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BRK
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@draw-cursor
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( clear last cursor )
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,clear_icn =Sprite.addr
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~pointer.x =Sprite.x
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~pointer.y =Sprite.y
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#10 =Sprite.color
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( record pointer positions )
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~Mouse.x =pointer.x ~Mouse.y =pointer.y
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( draw new cursor )
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,cursor_icn =Sprite.addr
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~pointer.x =Sprite.x
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~pointer.y =Sprite.y
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#11 ~Mouse.state #00 NEQ ADD =Sprite.color
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RTN
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@draw-circle ( xc yc r color )
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( load ) =color =circle.r =circle.yc =circle.xc
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#0000 =circle.x ~circle.r =circle.y
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~circle.r #0002 MUL2 #0003 SUB2 =circle.d
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( draw ) ,$seg JSR2
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$loop
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( incr ) ~circle.x ++ =circle.x
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~circle.d #0000 #0001 ADD2 LTS2 ^$else JNZ
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( decr ) ~circle.y -- =circle.y
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~circle.x ~circle.y SUB2 #0004 MUL2 ~circle.d ADD2 #000a ADD2 =circle.d
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,$end JMP2
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$else
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~circle.x #0004 MUL2 ~circle.d ADD2 #0006 ADD2 =circle.d
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$end
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( draw ) ,$seg JSR2
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~circle.y ~circle.x #0001 SUB2 GTS2 ^$loop JNZ
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RTN
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$seg
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~circle.xc ~circle.x ADD2 =Screen.x ~circle.yc ~circle.y ADD2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.x SUB2 =Screen.x ~circle.yc ~circle.y ADD2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.x ADD2 =Screen.x ~circle.yc ~circle.y SUB2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.x SUB2 =Screen.x ~circle.yc ~circle.y SUB2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.y ADD2 =Screen.x ~circle.yc ~circle.x ADD2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.y SUB2 =Screen.x ~circle.yc ~circle.x ADD2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.y ADD2 =Screen.x ~circle.yc ~circle.x SUB2 =Screen.y ~color =Screen.color
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~circle.xc ~circle.y SUB2 =Screen.x ~circle.yc ~circle.x SUB2 =Screen.y ~color =Screen.color
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RTN
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@ERROR BRK
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@clear_icn [ 0000 0000 0000 0000 ]
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@cursor_icn [ 80c0 e0f0 f8e0 1000 ] |