Code structure cleanup.

Assets/Cryville/Crtr/Skin/Components/SpriteScale3.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Cryville.Crtr.Skin.Components {
+	public class SpriteScale3 : SpritePlane {
+		public SpriteScale3() {
+			SubmitProperty("border", new PropOp.Vector2(v => Border = v));
+		}
+
+		static readonly Dictionary<float, int> uvrefl
+			= new Dictionary<float, int>() {
+			{-0.5f, 0}, {-0.4f, 1}, {0.4f, 2}, {0.5f, 3},
+		};
+		static Vector2[] _origuv;
+		protected static new Vector2[] OriginalUV {
+			get {
+				if (_origuv == null) {
+					var m = BuiltinResources.Meshes["quad_scale3h"];
+					Vector2[] uv = new Vector2[m.vertices.Length];
+					for (int i = 0; i < uv.Length; i++) {
+						uv[i] = new Vector2(
+							uvrefl[m.vertices[i].x],
+							uvrefl[m.vertices[i].z]
+						);
+					}
+					_origuv = uv;
+				}
+				return _origuv;
+			}
+		}
+
+		Vector2 _border = new Vector2(0, 1);
+		public Vector2 Border {
+			get { return _border; }
+			set {
+				_border = value;
+				UpdateScale();
+			}
+		}
+		protected override void UpdateScale() {
+			base.UpdateScale();
+			if (!mesh.Initialized) return;
+			UpdateUV();
+		}
+
+		readonly Vector2[] _uvs = new Vector2[8];
+		readonly Vector3[] _verts = new Vector3[8];
+		protected override void UpdateUV() {
+			var frame = CurrentFrame;
+			if (SpriteInfo.IsNullOrEmpty(frame)) return;
+
+			Vector2[] muv = OriginalUV;
+
+			var or = frame.Ratio;
+			var sr = Scale.x / Scale.y;
+			var rr = or / sr;
+			var b1 = rr * _border.x;
+			var b2 = 1 - rr * (1 - _border.y);
+
+			for (int i = 0; i < muv.Length; i++) {
+				float x; float bx;
+				switch ((int)muv[i].x) {
+					case 0: x = 0; bx = 0; break;
+					case 1: x = _border.x; bx = b1; break;
+					case 2: x = _border.y; bx = b2; break;
+					case 3: x = 1; bx = 1; break;
+					default: throw new NotSupportedException("Built-in resource corrupted");
+				}
+				float y;
+				switch ((int)muv[i].y) {
+					case 0: y = 0; break;
+					case 3: y = 1; break;
+					default: throw new NotSupportedException("Built-in resource corrupted");
+				}
+				_uvs[i] = frame.Frame.GetUV(x, y);
+				bx -= 0.5f; y -= 0.5f;
+				_verts[i] = new Vector3(bx, 0, y);
+			}
+			mesh.Mesh.uv = _uvs;
+			mesh.Mesh.vertices = _verts;
+		}
+		
+		public override void Init() {
+			InternalInit("quad_scale3h");
+			OnFrameUpdate();
+		}
+	}
+}