Re: [Glsdk-devel] Commentary on the math library

[Jason M. <ko...@gm...>]

On Thu, Aug 28, 2008 at 12:35 PM, Andrew Gajda <and...@gm...> wrote:
> Maybe it's been a while since I've done pure C (like with my function
> overloading example) but can someone tell me what the advantage might to
> doing:
> someGLMfunc( GLMvec3f *out, blah, blah )
> {
>    GLMvef3 tmp;
>    ...
>    tmp.x = something;
>    tmp.y = something;
>    tmp.z = something;
>
>    *out = tmp;
>
>    return out;
> }
>
> Why not just assign *out directly?

Because "out" may be equal to "blah":

someFunc(GLMvec3f *out, GLMvec3f *in1, GLMvec3f *in2);

GLMvec3f first, second;
someFunc(&first, &first, &second);