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From: "Luke Guest" <lguest@nospambubball.com>
Newsgroups: comp.lang.ada
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Subject: Re: Access type conversions, how?
Date: Tue, 13 Apr 2004 17:01:35 +0100
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"chris" <spamoff.danx@ntlworld.com> wrote in message
news:LnTec.5$094.0@newsfe1-win...
> Luke A. Guest wrote:
> > Well, I know that! But, I don't want to have different Matrix types
> > for different platforms, and that's essentially what that will mean.
>
> Why not use this?
>
> type GLMatrix is array (1 .. 15) of GLFloat;
> pragma Convention(C, GLMatrix);

No.

> What do you want to do?  Pass an array to a C function or an array of
> arrays?

Like I said, we have a GL package which is the OpenGL bindings (yeah, all
the functions).

I want to have an abstraction layer so I can *hide* the details of the 3D
API (or whatever
I'm using on a particular platform), above my layer, I don't want any other
code to know
about the lower levels, i.e. it should not reply on GL.GLfloat, simple as
that.

But as GL bindings use the GL types, I cannot get a pointer to convert to
another pointer with
the same base types.

Luke.