private void UpdateLight()

in SamplesCommon/SamplesCommon/LightControl.xaml.cs [206:280]
63 lines of code
7 McCabe index (conditional complexity)

        private void UpdateLight()
        {
            if (LightTypeSelection.SelectedValue != null)
            {
                ComboBoxItem item = LightTypeSelection.SelectedValue as ComboBoxItem;
                LightTypes lightType = (LightTypes)item.Tag;

                if (_light != null)
                {
                    _light.Targets.RemoveAll();
                }

                switch (lightType)
                {
                    case LightTypes.PointLight:
                        {
                            PointLight light = _compositor.CreatePointLight();
                            light.CoordinateSpace = CoordinateSpace;
                            light.Offset = new Vector3((float)XOffset.Value, (float)YOffset.Value, (float)ZOffset.Value);
                            light.ConstantAttenuation = (float)ConstantAttenuation.Value / c_ConstantAttenRange;
                            light.LinearAttenuation = (float)LinearAttenuation.Value / c_LinearAttenRange * .1f;
                            light.QuadraticAttenuation = (float)QuadraticAttenuation.Value / c_QuadraticAttenRange * .01f;
                            light.Color = LightColor.Color;

                            _light = light;
                        }
                        break;

                    case LightTypes.SpotLight:
                        {
                            SpotLight light = _compositor.CreateSpotLight();
                            light.CoordinateSpace = CoordinateSpace;
                            light.Offset = new Vector3((float)XOffset.Value, (float)YOffset.Value, (float)ZOffset.Value);
                            light.ConstantAttenuation = (float)ConstantAttenuation.Value / c_ConstantAttenRange;
                            light.LinearAttenuation = (float)LinearAttenuation.Value / c_LinearAttenRange *.1f;
                            light.QuadraticAttenuation = (float)QuadraticAttenuation.Value / c_QuadraticAttenRange * .01f;
                            light.InnerConeAngleInDegrees = (float)InnerCone.Value;
                            light.InnerConeColor = InnerConeColor.Color;
                            light.OuterConeAngleInDegrees = (float)OuterCone.Value;
                            light.OuterConeColor = OuterConeColor.Color;

                            Vector3 lookAt = new Vector3((float)DirectionX.Value, (float)DirectionY.Value, 0);
                            Vector3 direction = Vector3.Normalize(lookAt - new Vector3(300, 300, 300));
                            light.Direction = direction;
                            
                            _light = light;
                        }
                        break;

                    case LightTypes.DistantLight:
                        {
                            DistantLight light = _compositor.CreateDistantLight();
                            light.CoordinateSpace = CoordinateSpace;
                            light.Color = LightColor.Color;

                            Vector3 lookAt = new Vector3((float)DirectionX.Value, (float)DirectionY.Value, 0);
                            Vector3 offset = new Vector3(300, 300, 100);
                            light.Direction = Vector3.Normalize(lookAt - offset);

                            _light = light;
                        }
                        break;

                    default:
                        Debug.Assert(false, "Unexpected type");
                        break;
                }

                // Add the visual to the light target collection
                foreach (Visual target in _targetVisualList)
                {
                    _light.Targets.Add(target);
                }
            }
        }