Re: texture matrix

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Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Sat, 2 Mar 1996 14:59:04 +0100

Bummer! (I should have known better)

Here are some draw callbacks which worked with performer 1.2, I haven't
tried it with 2.0 but it should work. I think this is pretty much what you
described you were doing though.

static float ident_matrix[4][4] = {
    1.0, 0.0, 0.0, 0.0,
    0.0, 1.0, 0.0, 0.0,
    0.0, 0.0, 1.0, 0.0,
    0.0, 0.0, 0.0, 1.0
};

static long Pre_texture_transform(pfTraverser *trav, void *data)
{
  short MAT_mode;
  MAT_mode = getmmode();
  mmode(MTEXTURE);
  loadmatrix(texture_matrix); /* do what you like here */
  mmode(MAT_mode);
}

static long Post_texture_transform(pfTraverser *trav, void *data)
{
  short MAT_mode;
  MAT_mode = getmmode();
  mmode(MTEXTURE);
  loadmatrix(ident_matrix);
  mmode(MAT_mode);
}

Rgds,
Angus.

On Mar 1, 9:22am, AnitaKishore wrote:
>
> "pushmatrix operates on the single transformation stack when mmode is
> MSINGLE, and on the ModelView matrix stack when mmode is MVIEWING. It
> should not be called when mmode is MPROJECTION or MTEXTURE."

>-- End of excerpt from AnitaKishore

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