8 hours ago, Stephan Houben wrote:
> I have code like this which dispatches on the type of a homogenous
> vector:
>
> (define (gl-vector->type vec)
> (cond
> ((bytes? vec) GL_UNSIGNED_BYTE)
> ((s8vector? vec) GL_BYTE)
> ((u16vector? vec) GL_UNSIGNED_SHORT)
> ((s16vector? vec) GL_SHORT)
> ((u32vector? vec) GL_UNSIGNED_INT)
> ((s32vector? vec) GL_INT)
> ((f32vector? vec) GL_FLOAT)
> ((f64vector? vec) GL_DOUBLE)))
>
> I was wondering if there is a more efficient way to do this, one
> which doesn't involve a linear scan over all possible types. I
> presume that at the C level there is a "type tag" associated with
> any of these types; is it possible to access this from the Racket
> level?
If this is only for such vectors, you might consider using cvectors
instead.
--
((lambda (x) (x x)) (lambda (x) (x x))) Eli Barzilay:
http://barzilay.org/ Maze is Life!
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