Path: chuka.playstation.co.uk!scea!greg_labrec@interactive.sony.com
From: Brian Bacon <kyberteknik@geocities.com>
Newsgroups: scea.yaroze.programming.3d_graphics
Subject: I need help with ApplyMatrix
Date: Tue, 02 Sep 1997 10:27:17 -0700
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Hello,

  I need help with apply matrix.  I am doing some advanced 3d
programming (hehe.. I'm rotating two cubes and a view)  everything with
the cubes works just fine, but when I rotate the view matrix, then use
Apply Matrix after about the 3rd revolution of the view it will lockup. 
Here is the function I am using:

//****************START*******************
void RotTransPer(SVECTOR *v0, VECTOR_2D *v1, MATRIX *matrix)
{
    VECTOR  vt;
    register unsigned long   h_z;

    ApplyMatrix(matrix, v0, &vt);

    vt.vx += matrix->t[0];
    vt.vy += matrix->t[1];
    vt.vz += matrix->t[2];

    h_z=(1581056/vt.vz);
    v1->x = (short)((vt.vx * h_z)>>12);
    v1->y = (short)((vt.vy * h_z)>>12);
}
//*****************END********************

Is there any kind of limitation to ApplyMatrix that might be locking it
up?  And why would it work just fine when I rotate the cubes but not
when I rotate the view?
			-Brian Bacon