Gerhard Wesp said: (by the date of Thu, 15 Jun 2006 11:39:15 +0200)
On Thu, Jun 15, 2006 at 02:17:38PM +0700, Oleg Abrosimov wrote:
the problem here is that PQS deals with only dimensions, but physical quantities have not only that, they have rank also.
What is the rank of a physical quantity?
good question indeed. I can grasp the idea of that. In fact above quote written by Oleg was a revelation for me. But how to include the concept or "rank" into the library design? Would it boil down to abstract_quantity_id, but with different name? I'm really not sure if one can hold energy inside a vector (say: vector field of energy), perhaps some physicist here can answer this question. But I'm sure that momentum can be hold as a vector (ie. momentum vector). Could it possibly mean, that some quantities can be represented as vectors, while representing others as vector doesn't make sense - would it be "rank" then? But anyway - even if we find a specification on how to implement it, I'd rather focus on it later. There is already tons of work with this library. -- Janek Kozicki |