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   groff (geoffl@mastodon.me.uk)'s status on Saturday, 24-Feb-2024 22:11:35 JST groff

   • BBC Micro Bot :mastodon:
   • bazzargh

   @bazzargh @bbcmicrobot I ended up with the same kind of stripy dither you got two posts up when I flipped a +z to -

   I'm not smart enough to rewrite your chain routine so I went for a hack-it-till-it-breaks-then-roll-back-and-try-again approach and added an 8x8 bayer dither matrix. I think I've got enough pixels calculated now to avoid any bleed or moire patterns. Starting the pre-calculated angles at 0.5 degrees helped avoid various vertical line issues.

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     BBC Micro Bot :mastodon: (bbcmicrobot@mastodon.me.uk)'s status on Saturday, 24-Feb-2024 22:11:32 JST BBC Micro Bot :mastodon:

     in reply to

     I ran @geoffl's program and got this.
     Source: https://bbcmic.ro/?t=9qQoY #bbcbasic

   • Embed this notice
     groff (geoffl@mastodon.me.uk)'s status on Saturday, 24-Feb-2024 22:11:34 JST groff

     in reply to

     • bazzargh

     @bazzargh #bbcmicrobot 🚀
     MO.0:DIMS(451),D(7,7):F.I=.5TO451:S(I)=SINRADI:N.
     FORI=0TO7:FORJ=0TO7
     D(I,J)=(I DIV4*2+J DIV4*3)MOD4+(I DIV2 MOD 2*2+J DIV2 MOD2*3)MOD4*4+(I MOD2*2+J MOD2*3)MOD4*16
     N.,
     W=48
     F.A=0TO360STEP64
     T=((2+(A DIV64))*80)MOD360
     F.U=0TO360
     F.V=0TO360S.4
     B=W+14*S(1*V)
     X=(A+B*S(U))*2
     Y=INT(B*S(U+90))
     Z=14*S(1*V+90)
     M=Y*S(T+90)+Z*S(T)
     N=Y*S(T)-Z*S(T+90)+42
     IFN*.7>D((512+M)MOD8,ABSX MOD8) G=2*INTX:H=4*INTM:PL.69,G,512+H:PL.69,1280-G,512-H
     N.,,

     Annika Backstrom repeated this.