public float3x3 MakeRotZ( float _fAngle )
{
MakeIdentity(); float fCosine = (float) System.Math.Cos( _fAngle ); float fSine = (float) System.Math.Sin( _fAngle ); m[0, 0] = +fCosine; m[0, 1] = +fSine; m[1, 0] = -fSine; m[1, 1] = +fCosine; return this;
}