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On 30 Aug 1999 11:18:50 -0400, Nieminen Juha wrote:
>: and another that fills the x-y plane with triangle, using six "colours".
>
> This one is not as trivial as the previous one, but I'm sure it's also
>possible with pigment_maps.
Here's one implementation, derived from my previous hexagons-with-mortar
pattern:
#include "colors.inc"
#macro TriTiles( PigArray )
#local hexBlock=pigment { radial pigment_map{
#local i=0; #while (i<6)[i/6 PigArray[i]]
[(i+1)/6 PigArray[i]] #local i=i+1; #end}}
radial pigment_map {#local i=1; #while (i<3)
[i/3 hexBlock translate vrotate(x,(120*i-60)*y)]
[i/3 hexBlock translate vrotate(x,(120*i+60)*y)]
#local i=i+1; #end } warp {repeat x flip x }
warp {repeat sqrt(3)*z} scale .5
#end
#declare MyPigArray=array[6] {
pigment {color Red}
pigment {color Yellow}
pigment {color Green}
pigment {color Cyan}
pigment {color Blue}
pigment {color Magenta}
}
plane { y,0 pigment {TriTiles(MyPigArray)}}
camera { location 12*y sky z look_at 0 }
light_source { 6*y rgb 1}
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