gl.multMatrix error

[orbis]

I seem to have some problems with a function that was/wasn’t ported to JOGL from the native code. The error occurs when I try to call gl.multMatrix( m ). If anyone can point me in the right direction, I would be greatful.

import net.java.games.jogl.*;

public class CCamera
{
    public float MaxPitchRate,
                 PitchDegrees,
                 MaxHeadingRate,
                 HeadingDegrees,
                 MaxRollRate,
                 RollDegrees,
                 MaxVelocity,
                 Velocity;
                 
    public CQuaternion4 Heading = new CQuaternion4(),
                        Pitch   = new CQuaternion4(),
                        Roll    = new CQuaternion4();
    public GLU glu;
    public GL gl;
                        
    public CPoint3 PositionPoint = new CPoint3();
    
    public CVector3 DirectionVector = new CVector3();
    
    public void CCamera()
    {
        MaxPitchRate   = 0.0f;
        PitchDegrees   = 0.0f;
        MaxHeadingRate = 0.0f;
        HeadingDegrees = 0.0f;
        MaxRollRate    = 0.0f;
        RollDegrees    = 0.0f;
        MaxVelocity    = 0.0f;
        Velocity       = 0.0f;
    }
    
    public void SetPerspective()
    {
        CMatrix16 PerspectiveMatrix = new CMatrix16();
        CQuaternion4 PerspectiveQuaternion = new CQuaternion4();
        
        Pitch.CreateFromAxisAngle(0.0f, 0.0f, 0.0f, PitchDegrees);
        Heading.CreateFromAxisAngle(0.0f, 1.0f, 0.0f, HeadingDegrees);        
        
        PerspectiveQuaternion = Pitch.Cross(Heading);
        PerspectiveQuaternion.CreateMatrix(PerspectiveMatrix);
        //////////////////////////////////ERROR HERE
        gl.multMatrix( PerspectiveMatrix.Data );
        ///////////////////////////////////////    
        PerspectiveQuaternion.CreateMatrix(PerspectiveMatrix);
        DirectionVector.y = PerspectiveMatrix.Data[9];
        
        PerspectiveQuaternion = Heading.Cross(Pitch);
        PerspectiveQuaternion.CreateMatrix(PerspectiveMatrix);
        DirectionVector.x = PerspectiveMatrix.Data[8];
        DirectionVector.z = PerspectiveMatrix.Data[10];
        
        DirectionVector = DirectionVector.ScalarMult(Velocity);
        
        PositionPoint.x = PositionPoint.x + DirectionVector.x;
        PositionPoint.y = PositionPoint.y + DirectionVector.y;
        PositionPoint.z = PositionPoint.z + DirectionVector.z;
        
        gl.glTranslatef(-PositionPoint.x, -PositionPoint.y, PositionPoint.z);
    }
}

I actually ported this code from C++ from a tutorial found at GameTutorials.com, but I seem to get stuck here. Thank you in advance. (By the way: the whole class isn’t here, just the first half of it.)

Cheers!

[orbis]

Heh, solved, stupidity at its prime. Since I ported from C++ I forgot the nifty gl.glMultMatrixf( m ).

Works now!