On 01/06/2012 09:39 PM, Micke wrote:
> Alain<aze### [at] qwertyorg>  wrote:

>>>
>>> I am trying to randomise a texure in a while-loop.Is this possible,and how can I
>>> achive this please.
>>>
>>>
>> First, you initiate a random stream: #declare Rand = seed(0);
>> seed() takes any integer value as it's argument.
>>
>> Then, in your loop, you use that stream to randomly create some pigment
>> or switch between patterns and create random colour_map, also using your
>> random stream.
>>
>> You can create a stream to sellect your pattern and another for the colours.
>> You can create a random pigment like this:
>> pigment{rgb<rand(Rand),rand(Rand),rand(Rand)>}
>> pigment{rgbft<rand(Rand),rand(Rand),rand(Rand),rand(Rand)/2,rand(Rand)/2>}
>> will generate pigments that are transparent to various degrees.
>>
>> You can use the #switch() #case()/#range() #break #end statement to
>> sellect between various patterns. Read the documentation about the
>> #switch() statement. The #break is mandatory.
>>
>>
>> Alain
>
> Thankyou for your reply, but still no success. Here is my code.
>   #declare Rand = seed(1);
>   #declare Count = 0;
>   #while (Count<10)
>   object{My_Column translate-x*12
> //   texture {My_Marble rotate<rand(Rand),rand(Rand),rand(Rand)>}
>    *Count  rotate - 100*y
>       }
>    #declare Count=Count+1;
>
>   #end
> All works untill I add the texture line, then this error:No matching } in
> object',: found instead. What am I doing wrong,please.
>
>
hmmm ... first off the line *Count rotate - 100*y just looked strange 
before I even started. After satisfying My_Column and My_Marble (my own 
simple definition) I get this error:

Parse Error: No matching } in 'object', * found instead

that confirms my suspicion about the *Count line, so perhaps there is 
something in one of those other definitions thats causing the problem 
... since I'm not sure of your intent, that's my best guess.

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