"Slime" <fak### [at] emailaddress> wrote in news:3f5fef88$1@news.povray.org:

>>     scale 10 + z * 30
> 
> This is equivalent to
> 
> scale <10, 10, 10> + <0, 0, 30>
> 
> or
> 
> scale <10, 10, 40>
> 
>>
>> Without testing I would assume the following 2 lines will do the same
>> as above:
>>
>>     scale <10,10,10>
>>     scale < 1, 1,30>
> 
> No, the above is equivalent to
> 
> scale <10, 10, 300>
> 
> You'll get used to these sort of vector additions with a little
> practice, and you'll be able to quickly identify what an expression
> evaluates to. 


I rest my case :)

Well it turns out that

    	scale <10, 10, 40>

is a lot more readable and less open to misinterpretation than is

    	scale 10 + z * 30


There is just the problem, clarity gone out the window.

It's just frustrating that such a simple instruction can be so complex
and hard to read. 

Thanks

Marc

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