On 01 Jan 09, at 10:56, Adam Foltzer wrote:
Off to do some refactoring of my Swarm class; at the risk of
spawning a
tangent, am I just completely missing a Cocoa data structure that's
suited
to matrices of scalar values? I had a working implementation using
nested
NSMutableArrays, but the code wound up looking disgusting (my fault,
not the
API's ;-), so I rewrote it with good ol' C arrays, malloc, and free.
It has
no leaks now, and is really, really fast, but I feel like I
shouldn't have
to reinvent the wheel in order to do matrix operations.
The Cocoa collection classes are primarily oriented towards dealing
with ObjC objects. If all you're working with is homogeneous arrays of
scalar values (or structures consisting of scalar values), you
probably are best off using C arrays.
That's not to say that Apple has nothing to offer. If you're
performing SIMD-esque operations on large matrices or vectors, the
Accelerate framework might have some tools you'd be interested in.
It's listed under Carbon for some reason, but it's just as applicable
to Cocoa applications.
If that doesn't do it, but you're fine with targeting Intel machines
only, dropping down to the SSE primitives may also be an option to
consider.
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