public override void SetTextureAddressingMode( int stage, UVWAddressing uvw )
{
// set the device sampler states accordingly
SetSamplerState( GetSamplerId( stage ), SamplerState.AddressU, (int)D3DHelper.ConvertEnum( uvw.U ) );
SetSamplerState( GetSamplerId( stage ), SamplerState.AddressV, (int)D3DHelper.ConvertEnum( uvw.V ) );
SetSamplerState( GetSamplerId( stage ), SamplerState.AddressW, (int)D3DHelper.ConvertEnum( uvw.W ) );
}