Yes, very easy indeed. My system was designed to be flexible in this regard. The
user (ie me :-) gets given particle position and velocity. It's then up to them
to do what they want with it. I have a few standard display options at the
moment, and just add or modify them as I need.

MJL

Tim Nikias wrote:

> That's not too difficult to implement, as I would guess doing something like
>
> cone{Position,Radius Position+Direction*Velocity,0}
>
> isn't that difficult to smuggle into the code somewhere...
>
> Tim

--
light_source{12*(y-z)rgb 2fade_distance 9fade_power 2area_light x,z,5,5}#macro A
(H,B,R,T)prism{0,1H+4,0u*9,9v*9,0#local I=1;#while(I<H)#local V=asc(substr(B,I,1
))-33;<div(V,10)mod(V,10)>#local I=I+1;#end pigment{red 1}rotate-<90,R>translate
-T}#end A(16"/.@VZno=<PLA89/"0,5*x)A(14",6;MWmhryXN3,"60<15,0,8>)camera{location
25*(y-z)look_at 0}A(8"6hiAG=6"-60,-10*x)box{-99(x+z)*99 pigment{rgb 1}}   // MJL

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