Re: [Glsdk-devel] [GLM] open questions with the matrix api

[H. H. <hen...@gm...>]

Good.

I will be making the changes in the upcoming commits, and updating the test
cases for them.

I have also added some explaining comments for the matrix layouts in my last
commit:

typedef struct {
  union {
    /* Matrix layout:
       | data[0] data[2] |
       | data[1] data[3] |
    */
    GLfloat data[4];
    struct {
      /* Matrix layout:
         | m00 m01 |
         | m10 m11 |
      */
      GLfloat m00, m10, m01, m11;
    };
  };
} GLMmat2f;

All this will of course need to go to the GLM API documentation also, in
time.


On Sun, Aug 24, 2008 at 10:50 PM, Jason McKesson <ko...@gm...> wrote:

> Henri Häkkinen wrote:
> > Another open issues has came up:
> >
> > Do you think we should allow something like this:
> >
> > glmMatInverse2f (&mat, &mat);
> > glmMatTranspose2f (&mat, &mat);
> > glmVecAdd2f (&vec, &vec, &vec);
> >
> > For some functions, this add some additional processing since it needs
> > to store temporary values of matrix members before performing an
> > operation, such as:
> >
> > ...
> >
> > My proposal is that we allow glmMatInverse2f (&mat, &mat) and live
> > with the additional overhead. -Self funcs may still be included for
> > convenience (at some later GLM versions).
> Agreed. It adheres to the principle of least surprise. The less-careful
> user will expect to be able to pass the same parameter, or outputs as
> inputs, and we should allow it.
>
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-- 
Henri 'henux' Häkkinen