I ran @p_malin's program and got this.
Source: https://bbcmic.ro/?t=eN1lD #bbcbasic
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ë1:ï5
ãU=0¸319
ãV=32¸223
x=U/128-1.25:y=V/128-1.1:z=1
x=x+y*.3:y=y-x*.3
X=x:Y=0.4+y:Z=-5+z
C%=-1
h=³(1)
çV<60ƄV>200ƄV-U>65ƄU-V>140ƌC%=9:å230
õ
T=X*X+Y*Y+Z*Z
D=¶T
d=D-1
a=-d/(T*D)
çZ<-3.5:å 180
x=x+X*a:y=y+Y*a:z=z+Z*a:
n=1/¶(x*x+y*y+z*z):x=x*n:y=y*n:z=z*n
B=Y+y*d
ç´Y<>´B ƌt=-Y/y:u=X+x*t:v=Z+z*t:r=u*u+v*v:çr>2.25ƀr<14ƌC%=4-Ɣ(8-r)*.5-h
X=X+x*d:Y=B:Z=Z+z*d
çD>5ƌC%=9Ƌçd<0.1ƌC%=0
ýC%>=0
çC%=9ƌC%=-3*(h>.98)
æ0,C%:ð69,U*4,V*4
í,
õý0
#BBCMicroBot 🚀
I ran @p_malin's program and got this.
Source: https://bbcmic.ro/?t=eN1n7 #bbcbasic
🚀MO.1:F.U=0TO319:MOVEU*4,-4:F.V=0TO255:x=U/128-1.25:y=V/128-1.1:z=1:x=x+y*.3:y=y-x*.3:X=x:Y=.4+y:Z=-5+z:C%=-1:h=RND(1):IFV<60ORV>200ORV-U>65ORU-V>140C%=3A.h>.98:G.60
REP.T=X*X+Y*Y+Z*Z:D=SQRT:d=D-1:a=-d/(T*D):IFZ>=-3.5x=x+X*a:y=y+Y*a:z=z+Z*a:n=1/SQR(x*x+y*y+z*z):x=x*n:y=y*n:z=z*n
B=Y+y*d:IFSGNY<>SGNB t=-Y/y:u=X+x*t:v=Z+z*t:r=u*u+v*v:IFr>2.25IFr<14C%=4-ABS(8-r)*.5-h
X=X+x*d:Y=B:Z=Z+z*d:IFD>5C%=9EL.IFd<.1C%=0
U.C%>=0:IFC%=9C%=3A.h>.98
GC.0,C%:PL.65,0,4:N.,:V.5,1
#bbcmicrobot @p_malin
I ran @rheolism's program and got this.
Source: https://bbcmic.ro/?t=eNLY0 #bbcbasic
@bbcmicrobot @rheolism that's amazing, fwiw technically the disk and arc should be a bit brighter on one side
simulated view:
