Larry Evans wrote:
On 03/08/2005 06:26 AM, Tobias Schwinger wrote: [snip]
I use 'apply', 'apply_one' and 'apply_but' functions that allow me to apply functors to all elements, one element and all but one elements, respectively (I use different versions for both static and dynamic indices and both static and dynamic functors):
What does "static" and "dynamic" mean here? Does static mean "evaluable at compile time" and "dynamic" means otherwise?
Yes. A curious question: what else could it possibly mean in this context ?
[snip]
- Do you know the Boost.Assign technique ? I use a similar approach to have a nice syntax for initialization and inlining that works within expressions:
my_quaternion = n_x * sin_half_a , n_y * sin_half_a , n_z * sin_half_a , cos_half_a;
and
vector_slice<0,3> (my_quaternion) = (vec_inl| n_x,n_y,0.0) * sin_half_a;
Never seen this (vec_inl| n_x,n_y,0.0). Looks like a set expression or lambda expression. Could you provide a reference. I searched:
http://www.boost.org/libs/assign/doc/index.html#reference
for the character '|' but got no results.
This is _not_ Boost.Assign! As stated above it's part of my private library but it has some similarities to Boost.Assign. I use this to allow per-element data to be inlined in expressions. 'operator|' is overloaded for a tag type (vec_inl is a global of that type) and scalar types, creates an expression object for which an overloaded 'operator,' exists to append elements.
( The 'my_quaternion' variable from the examples is a four-dimensional vector, _not_ a boost::quaternion. )
Does "four-dimensional" mean "length is four" or "accessing a scalar requires four indices passed to the operator()", e.g.
Is this really that ambiguous ? AFAIK it's a proper mathematical term... Besides quaternions consist of four scalars (so I might as well omitted 'four-dimensional'). I found it necessary to disclaim it's not a boost::quaternion, though... Regards, Tobias