Implement effect.

Assets/Cryville/Crtr/SkinPropertyKey.cs

@@ -98,16 +98,21 @@ namespace Cryville.Crtr {
 		}
 		public class EmitEffect : SkinPropertyKey {
 			public int Name { get; set; }
-			public EmitEffect() { }
+			public EmitEffect() {
+				_op = new PropOp.Float(v => _index = v);
+			}
 			public override string ToString() {
 				return string.Format("@emit {0}", IdentifierManager.SharedInstance.Retrieve(Name));
 			}
 			public override bool IsValueRequired { get { return true; } }
 			public override void ExecuteStatic(ISkinnableGroup group, RuntimeSkinContext ctx, PdtExpression exp) {
-				// TODO
+				throw new InvalidOperationException("Emitting effect in static context is not allowed");
 			}
+			float _index;
+			readonly PropOp _op;
 			public override void ExecuteDynamic(ISkinnableGroup group, RuntimeSkinContext ctx, PdtExpression exp, int dl) {
-				// TODO
+				ChartPlayer.etor.Evaluate(_op, exp);
+				ChartPlayer.effectManager.Emit(Name, _index);
 			}
 		}
 	}