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From: "Luke A. Guest" <laguest@n_o_p_o_r_k_a_n_d_h_a_m.abyss2.demon.co.uk>
Newsgroups: comp.lang.ada
Subject: Access type conversions, how?
Date: Tue, 13 Apr 2004 01:32:34 +0100
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Date: 2004-04-13T01:32:34+01:00
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Hi,

We have the following in our GL package:

package C renames Interfaces.C;
...
type GLfloat      is new C.C_float;
...
type GLfloatPtr   is access all GLfloat;
...
procedure glMultMatrixf(M : in GLfloatPtr);

Now, in my code, I've created a Matrix package which has as it's type:

type Object is array(Integer range 0 .. 15) of aliased Float;

Now, I've made it aliased because I want to pass this to glMultMatrixf,
but for some reason I cannot work out exactly how to do it.

I've tried all sorts, like:

GL.glMultMatrixf(M(M'First)'Unchecked_Access); -- Wrong type

I've tried casting it to GL.GLfloat and GL.GLfloatPtr, but nothing's
working. Can anyone help?

Thanks,
Luke.