On Mon, 15 Mar 1999 20:15:38 GMT, nos### [at] despamcom (Jerry Anning)
wrote:

>On Mon, 15 Mar 1999 12:09:06 -0800, Josh English
><eng### [at] spiritonecom> wrote:
>
>>Andrew Cocker wrote:
>>
>>> I hope someone can help get me started with my latest experiment.
>>>
>>> I want to try out arrays. My plan is to create a cube made up of, say, 20x20x20
tiny
>>> spheres. If I pick one of these spheres and designate it to be the centre of the
effect
>>> I'm trying to create, and scale it by a factor of 2, how do I make the surrounding
spheres
>>> get gradually smaller until 5 spheres away they are back to scale 1? I plan to
animate the
>>> effect so that the centre of the effect moves around inside the array of spheres.
>>>
>>> I have heard the term 'fields' used. Is this the method I should use, and if so,
could
>>> anyone suggest either how it is done, or else point me in the direction of where I
can
>>> find more out about it.
>>>
>>> I am not a mathematician or a programmer, but I hand-code only so I should be able
to make
>>> use of any suggestions, as long as you assume large levels of ignorance on my
part.
>>>
>>> Many thanks in anticipation.
>>>
>>> -----------
>>> Andy
>>
>>I started a test file to look at this as follows:
>>
>>#declare MyGrid = array[10][10]
>>
>>// initalize the array
>>#macro InitGrid ()
>>  #declare i = 0;
>>  #declare j = 0;
>>
>>  #while ( i < 10 )
>******Insert #declare j=0; here! *********
>>    #while ( j < 10 )
>>      #declare MyGrid[i][j] = 1;
>>      #declare j = j + 1;
>>    #end
>>    #declare i = i + 1;
>>  #end
>>#end
>>
>>
>>#macro DrawGrid ()
>>  #declare i = 0;
>>  #declare j = 0;
>>
>>  #while (i < 10 )
******** And here! ***********
>>    #while ( j < 10 )
>>      sphere { <i*2,2,j*2> MyGrid[i][j]
>>               pigment { red 1 }
>>               finish { phong 1 } }
>>      #declare j = j + 1;
>>    #end
>>    #declare i = i + 1;
>>  #end
>>#end
>>
>>InitGrid()
>>DrawGrid()
>>
>>And in theory this is place to start, but when I render this code I get 10 spheres
instead of
>>100. It would appear that POV Ray does not like nested loops but there is nothing I
can find
>>to support this theory... has anyone else run into this or am I missing somthing
very obvious
>>in my code?
>>--
>>Josh English
>>eng### [at] spiritonecom
>>www.spiritone.com/~english
>>
>>
>
>Jerry Anning
>clem "at" dhol "dot" com

Jerry Anning
clem "at" dhol "dot" com

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