From 2ea42d4caeefc2afce1eb31781f7a8677a692c97 Mon Sep 17 00:00:00 2001
From: NathanSweet <nathan.sweet@gmail.com>
Date: Fri, 23 Sep 2016 10:58:15 +0200
Subject: [PATCH] noRotation transformMode experimentation.

---
 .../src/com/esotericsoftware/spine/Bone.java  | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java
index 20ed4dc58..aa5f16e46 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/Bone.java
@@ -155,6 +155,35 @@ public class Bone implements Updatable {
 		}
 		case noRotation: {
 			if (false) {
+				// Simple loop.
+				// 1) Inherits scale in the wrong direction.
+				// 2) Doesn't flip.
+				float rotationY = rotation + 90 + shearY;
+				float la = cosDeg(rotation + shearX) * scaleX;
+				float lb = cosDeg(rotationY) * scaleY;
+				float lc = sinDeg(rotation + shearX) * scaleX;
+				float ld = sinDeg(rotationY) * scaleY;
+				Bone current = parent;
+				while (current != null) {
+					float ca = Math.abs(current.ascaleX);
+					float cb = 0;
+					float cc = 0;
+					float cd = Math.abs(current.ascaleY);
+					float za = ca * la + cb * lc;
+					float zb = ca * lb + cb * ld;
+					float zc = cc * la + cd * lc;
+					float zd = cc * lb + cd * ld;
+					la = za;
+					lb = zb;
+					lc = zc;
+					ld = zd;
+					current = current.parent;
+				}
+				a = la;
+				b = lb;
+				c = lc;
+				d = ld;
+			} else if (false) {
 				// Summing parent rotations.
 				// 1) Negative parent scale causes bone to rotate.
 				float sum = 0;