foreach (EffectParameter p in e.Parameters)
                        {
                            if (p != null && p.Semantic != null)
                            {
                                switch (p.Semantic.ToUpper())
                                {
                                    case "WORLD":
                                        p.SetValue(world);
                                        break;
                                    case "VIEW":
                                        p.SetValue(view);
                                        break;
                                    case "PROJECTION":
                                        p.SetValue(projection);
                                        break;
                                    case "VIEWPROJECTION":
                                        p.SetValue(view * projection);
                                        break;
                                    case "WORLDVIEWPROJECTION":
                                        p.SetValue(world * view * projection);
                                        break;
                                    case "WORLDINVERSE":
                                        p.SetValue(Matrix.Invert(world));
                                        break;
                                    case "VIEWINVERSE":
                                        p.SetValue(Matrix.Invert(view));
                                        break;
                                    case "PROJECTIONINVERSE":
                                        p.SetValue(Matrix.Invert(projection));
                                        break;
                                    case "TOTALGAMETIME":
                                        p.SetValue((float)totalSeconds);
                                        break;
                                    case "CAMERAUP":
                                        p.SetValue(cameraUp);
                                        break;
                                    case "CAMERATARGET":
                                        p.SetValue(cameraTarget);
                                        break;
                                    case "TEXTURESTAGE0":
                                        p.SetValue(tex0);
                                        break;
                                }
                            }
                        }