Code structure cleanup.

Assets/Cryville/Crtr/Event/GroupHandler.cs

@@ -0,0 +1,52 @@
+using Cryville.Common.Math;
+using System;
+using UnityEngine;
+
+namespace Cryville.Crtr.Event {
+	public class GroupHandler : TransformHandler {
+		protected override TransformHandler Parent { get { return _ch; } }
+		public ChartHandler _ch;
+
+		ColumnVector<float> coeffs;
+		SquareMatrix matFrame;
+		ContainerState[] tracks;
+
+		public GroupHandler(Chart.Group tg, ChartHandler ch) : base() {
+			_ch = ch;
+		}
+		
+		public override string TypeName { get { return "group"; } }
+
+		public override void PreInit() {
+			base.PreInit();
+			tracks = cs.TypedChildren[typeof(Chart.Track)].ToArray();
+			int numTracks = tracks.Length;
+			coeffs = new ColumnVector<float>(numTracks);
+			matFrame = SquareMatrix.WithPolynomialCoefficients(numTracks);
+			frame1 = new ColumnVector<Vector3>(numTracks);
+			frame2 = new ColumnVector<Vector3>(numTracks);
+		}
+
+		ColumnVector<Vector3> frame1;
+		ColumnVector<Vector3> frame2;
+		public Vector3 GetCurrentFrame(Func<ContainerState, Vector3> func, float track) {
+			for (int i = 0; i < tracks.Length; i++)
+				frame1[i] = func(tracks[i]);
+			matFrame.Eliminate(frame1, frame2, Vector3Operator.Instance);
+			ColumnVector<float>.FillWithPolynomialCoefficients(coeffs, track);
+			return frame2.Dot(coeffs, Vector3Operator.Instance);
+		}
+	}
+
+	class Vector3Operator : IVectorOperator<Vector3> {
+		public static Vector3Operator Instance = new Vector3Operator();
+
+		public Vector3 Add(Vector3 lhs, Vector3 rhs) {
+			return lhs + rhs;
+		}
+
+		public Vector3 ScalarMultiply(float lhs, Vector3 rhs) {
+			return lhs * rhs;
+		}
+	}
+}