From 877e705ddb811a03479abdca9fa2f8841844f8fe Mon Sep 17 00:00:00 2001
From: Nathan Sweet <nathan.sweet@gmail.com>
Date: Tue, 6 Aug 2024 19:21:45 -1000
Subject: [PATCH] [libgdx] Fix NaN in IKConstraint due to fp precision.

853b5ee165106a57bc18e1e5543c8e16311af62f
---
 .../src/com/esotericsoftware/spine/IkConstraint.java         | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
index 67f833c96..8e57d91c6 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
@@ -339,8 +339,9 @@ public class IkConstraint implements Updatable {
 				q = -(c1 + q) * 0.5f;
 				float r0 = q / c2, r1 = c / q;
 				float r = Math.abs(r0) < Math.abs(r1) ? r0 : r1;
-				if (r * r <= dd) {
-					y = (float)Math.sqrt(dd - r * r) * bendDir;
+				r0 = dd - r * r;
+				if (r0 >= 0) {
+					y = (float)Math.sqrt(r0) * bendDir;
 					a1 = ta - atan2(y, r);
 					a2 = atan2(y / psy, (r - l1) / psx);
 					break outer;