增加2.1.x运行时

SpineRuntimes/SpineRuntime21/Bone.cs

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+/******************************************************************************
+ * Spine Runtimes Software License
+ * Version 2.1
+ * 
+ * Copyright (c) 2013, Esoteric Software
+ * All rights reserved.
+ * 
+ * You are granted a perpetual, non-exclusive, non-sublicensable and
+ * non-transferable license to install, execute and perform the Spine Runtimes
+ * Software (the "Software") solely for internal use. Without the written
+ * permission of Esoteric Software (typically granted by licensing Spine), you
+ * may not (a) modify, translate, adapt or otherwise create derivative works,
+ * improvements of the Software or develop new applications using the Software
+ * or (b) remove, delete, alter or obscure any trademarks or any copyright,
+ * trademark, patent or other intellectual property or proprietary rights
+ * notices on or in the Software, including any copy thereof. Redistributions
+ * in binary or source form must include this license and terms.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL ESOTERIC SOFTARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *****************************************************************************/
+
+using System;
+using System.Collections.Generic;
+
+namespace SpineRuntime21 {
+	public class Bone{
+		static public bool yDown;
+
+		internal BoneData data;
+		internal Skeleton skeleton;
+		internal Bone parent;
+		internal List<Bone> children = new List<Bone>();
+		internal float x, y, rotation, rotationIK, scaleX, scaleY;
+		internal bool flipX, flipY;
+		internal float m00, m01, m10, m11;
+		internal float worldX, worldY, worldRotation, worldScaleX, worldScaleY;
+		internal bool worldFlipX, worldFlipY;
+
+		public BoneData Data { get { return data; } }
+		public Skeleton Skeleton { get { return skeleton; } }
+		public Bone Parent { get { return parent; } }
+		public List<Bone> Children { get { return children; } }
+		public float X { get { return x; } set { x = value; } }
+		public float Y { get { return y; } set { y = value; } }
+		/// <summary>The forward kinetics rotation.</summary>
+		public float Rotation { get { return rotation; } set { rotation = value; } }
+		/// <summary>The inverse kinetics rotation, as calculated by any IK constraints.</summary>
+		public float RotationIK { get { return rotationIK; } set { rotationIK = value; } }
+		public float ScaleX { get { return scaleX; } set { scaleX = value; } }
+		public float ScaleY { get { return scaleY; } set { scaleY = value; } }
+		public bool FlipX { get { return flipX; } set { flipX = value; } }
+		public bool FlipY { get { return flipY; } set { flipY = value; } }
+
+		public float M00 { get { return m00; } }
+		public float M01 { get { return m01; } }
+		public float M10 { get { return m10; } }
+		public float M11 { get { return m11; } }
+		public float WorldX { get { return worldX; } }
+		public float WorldY { get { return worldY; } }
+		public float WorldRotation { get { return worldRotation; } }
+		public float WorldScaleX { get { return worldScaleX; } }
+		public float WorldScaleY { get { return worldScaleY; } }
+		public bool WorldFlipX { get { return worldFlipX; } set { worldFlipX = value; } }
+		public bool WorldFlipY { get { return worldFlipY; } set { worldFlipY = value; } }
+
+		/// <param name="parent">May be null.</param>
+		public Bone (BoneData data, Skeleton skeleton, Bone parent) {
+			if (data == null) throw new ArgumentNullException("data cannot be null.");
+			if (skeleton == null) throw new ArgumentNullException("skeleton cannot be null.");
+			this.data = data;
+			this.skeleton = skeleton;
+			this.parent = parent;
+			SetToSetupPose();
+		}
+
+		/// <summary>Computes the world SRT using the parent bone and the local SRT.</summary>
+		public void UpdateWorldTransform () {
+			Bone parent = this.parent;
+			float x = this.x, y = this.y;
+			if (parent != null) {
+				worldX = x * parent.m00 + y * parent.m01 + parent.worldX;
+				worldY = x * parent.m10 + y * parent.m11 + parent.worldY;
+				if (data.inheritScale) {
+					worldScaleX = parent.worldScaleX * scaleX;
+					worldScaleY = parent.worldScaleY * scaleY;
+				} else {
+					worldScaleX = scaleX;
+					worldScaleY = scaleY;
+				}
+				worldRotation = data.inheritRotation ? parent.worldRotation + rotationIK : rotationIK;
+				worldFlipX = parent.worldFlipX != flipX;
+				worldFlipY = parent.worldFlipY != flipY;
+			} else {
+				Skeleton skeleton = this.skeleton;
+				bool skeletonFlipX = skeleton.flipX, skeletonFlipY = skeleton.flipY;
+				worldX = skeletonFlipX ? -x : x;
+				worldY = skeletonFlipY != yDown ? -y : y;
+				worldScaleX = scaleX;
+				worldScaleY = scaleY;
+				worldRotation = rotationIK;
+				worldFlipX = skeletonFlipX != flipX;
+				worldFlipY = skeletonFlipY != flipY;
+			}
+			float radians = worldRotation * (float)Math.PI / 180;
+			float cos = (float)Math.Cos(radians);
+			float sin = (float)Math.Sin(radians);
+			if (worldFlipX) {
+				m00 = -cos * worldScaleX;
+				m01 = sin * worldScaleY;
+			} else {
+				m00 = cos * worldScaleX;
+				m01 = -sin * worldScaleY;
+			}
+			if (worldFlipY != yDown) {
+				m10 = -sin * worldScaleX;
+				m11 = -cos * worldScaleY;
+			} else {
+				m10 = sin * worldScaleX;
+				m11 = cos * worldScaleY;
+			}
+		}
+
+		public void SetToSetupPose () {
+			BoneData data = this.data;
+			x = data.x;
+			y = data.y;
+			rotation = data.rotation;
+			rotationIK = rotation;
+			scaleX = data.scaleX;
+			scaleY = data.scaleY;
+			flipX = data.flipX;
+			flipY = data.flipY;
+		}
+
+		public void worldToLocal (float worldX, float worldY, out float localX, out float localY) {
+			float dx = worldX - this.worldX, dy = worldY - this.worldY;
+			float m00 = this.m00, m10 = this.m10, m01 = this.m01, m11 = this.m11;
+			if (worldFlipX != (worldFlipY != yDown)) {
+				m00 = -m00;
+				m11 = -m11;
+			}
+			float invDet = 1 / (m00 * m11 - m01 * m10);
+			localX = (dx * m00 * invDet - dy * m01 * invDet);
+			localY = (dy * m11 * invDet - dx * m10 * invDet);
+		}
+
+		public void localToWorld (float localX, float localY, out float worldX, out float worldY) {
+			worldX = localX * m00 + localY * m01 + this.worldX;
+			worldY = localX * m10 + localY * m11 + this.worldY;
+		}
+
+		override public String ToString () {
+			return data.name;
+		}
+	}
+}