I'm working on some animations and want to create a single image with 
the moving objects in their various positions, so I can easily debug my 
movement parameters without generating lots of images.

So, I've had the idea of using the 'transmit' value to make earlier 
instances appear as "echoes" so that it's obvious which are the older 
and which are newer. Attached is a scene which gives a very simple 
example of what I mean by the "echoes".

But my question is this -- if I have a complex object composed of the 
union of dozens (or hundreds!) of pieces, with a range of distinct 
textures, can this be done?   I was hoping something like:

    object { MyComplexMacro(.....) translate a1 transmit 0.0 }
    object { MyComplexMacro(.....) translate a2 transmit 0.6 }
    object { MyComplexMacro(.....) translate a3 transmit 0.2 }

Which of course is nowhere near correct, but is it possible to apply a 
'transmit' value (or another feature) to a complex object to make an 
"echo" like in this manner?

Thanks
------------------------
#include "colors.inc"

camera {
     location <15.0, 50.0, -10.0>
     look_at <15.0, 0.0, -10.00>
     direction z*1.3 up y right x*1.33
}

light_source { <-50.00, 60.00, -10.00> color White }
light_source { < 50.00, 60.00, -50.00> color White }

#macro mySphere(num)
   #local xmit = sqrt(num);
   sphere{ <30,0,-10>, 2 pigment {color rgb<1,0,1> transmit xmit } 
rotate num*y*75 translate <0,0,10> }
#end
 

#declare num = 8; 

#declare nn = 0; #while (nn<num)
         mySphere(nn/num)
         #declare nn = nn+1;
#end

plane { -y, 2 texture { pigment {color rgb<0.0,0.7,0.5> }}}

Post a reply to this message