[csharp] Fixed Path/TransformConstraint handling of reflection

spine-csharp/src/PathConstraint.cs

@@ -104,7 +104,14 @@ namespace Spine {
 			float[] positions = ComputeWorldPositions(attachment, spacesCount, tangents,
 				data.positionMode == PositionMode.Percent, spacingMode == SpacingMode.Percent);
 			float boneX = positions[0], boneY = positions[1], offsetRotation = data.offsetRotation;
-			bool tip = rotateMode == RotateMode.Chain && offsetRotation == 0;
+			bool tip;
+			if (offsetRotation == 0) {
+				tip = rotateMode == RotateMode.Chain;
+			} else {
+				tip = false;
+				Bone p = target.bone;
+				offsetRotation *= p.a * p.d - p.b * p.c > 0 ? MathUtils.DegRad : -MathUtils.DegRad;
+			}
 			for (int i = 0, p = 3; i < boneCount; i++, p += 3) {
 				Bone bone = (Bone)bones[i];
 				bone.worldX += (boneX - bone.worldX) * translateMix;
@@ -128,13 +135,15 @@ namespace Spine {
 						r = positions[p + 2];
 					else
 						r = MathUtils.Atan2(dy, dx);
-					r -= MathUtils.Atan2(c, a) - offsetRotation * MathUtils.DegRad;
+					r -= MathUtils.Atan2(c, a);
 					if (tip) {
 						cos = MathUtils.Cos(r);
 						sin = MathUtils.Sin(r);
 						float length = bone.data.length;
 						boneX += (length * (cos * a - sin * c) - dx) * rotateMix;
 						boneY += (length * (sin * a + cos * c) - dy) * rotateMix;
+					} else {
+						r += offsetRotation;
 					}
 					if (r > MathUtils.PI)
 						r -= MathUtils.PI2;

spine-csharp/src/TransformConstraint.cs

@@ -70,6 +70,8 @@ namespace Spine {
 			float rotateMix = this.rotateMix, translateMix = this.translateMix, scaleMix = this.scaleMix, shearMix = this.shearMix;
 			Bone target = this.target;
 			float ta = target.a, tb = target.b, tc = target.c, td = target.d;
+			float degRadReflect = (ta * td - tb * tc > 0) ? MathUtils.DegRad : -MathUtils.DegRad;
+			float offsetRotation = data.offsetRotation * degRadReflect, offsetShearY = data.offsetShearY * degRadReflect;
 			var bones = this.bones;
 			var bonesItems = bones.Items;
 			for (int i = 0, n = bones.Count; i < n; i++) {
@@ -78,7 +80,7 @@ namespace Spine {
 
 				if (rotateMix != 0) {
 					float a = bone.a, b = bone.b, c = bone.c, d = bone.d;
-					float r = MathUtils.Atan2(tc, ta) - MathUtils.Atan2(c, a) + data.offsetRotation * MathUtils.DegRad;
+					float r = MathUtils.Atan2(tc, ta) - MathUtils.Atan2(c, a) + offsetRotation;
 					if (r > MathUtils.PI)
 						r -= MathUtils.PI2;
 					else if (r < -MathUtils.PI) r += MathUtils.PI2;
@@ -120,7 +122,7 @@ namespace Spine {
 					if (r > MathUtils.PI)
 						r -= MathUtils.PI2;
 					else if (r < -MathUtils.PI) r += MathUtils.PI2;
-					r = by + (r + data.offsetShearY * MathUtils.DegRad) * shearMix;
+					r = by + (r + offsetShearY) * shearMix;
 					float s = (float)Math.Sqrt(b * b + d * d);
 					bone.b = MathUtils.Cos(r) * s;
 					bone.d = MathUtils.Sin(r) * s;