void CMatrix::Update3DSCameraMatrix(Vector3D pos, Vector3D tar, Vector3D up, float grader)
{
	CMatrix r; // roll
	Vector3D x, y, z;
	Vector3D negpos;

	//kamera posisjonen
	negpos=pos;
	negpos.Negate();

	z=pos - tar;
	z.Normalize();

	x=up^z;
	up=z^x;

	x.Normalize();
	y.Normalize();

	Matrix[0]=x.x;	Matrix[4]=x.y;	Matrix[8]=x.z;	Matrix[12]=0;
	Matrix[1]=up.x;	Matrix[5]=up.y;	Matrix[9]=up.z;	Matrix[13]=0;
	Matrix[2]=z.x;	Matrix[6]=z.y;	Matrix[10]=z.z;	Matrix[14]=0;
	Matrix[3]=0;	Matrix[7]=0;	Matrix[11]=0;	Matrix[15]=1;

	r.LoadIdentity();
	r.CreateRotationMatrix(Vector3D(0,0, grader/180.0f*M_PI));
	MultiplyMatrix(r);
	PreTranspose(&negpos);
}