commit f33d9a194bb5fb4daf28820965270e7adf1e7e24
Author: Leszek Koltunski <leszek@koltunski.pl>
Date:   Fri Jul 30 14:47:25 2021 +0200

    Minor.

diff --git a/src/main/java/org/distorted/objects/TwistyJing.java b/src/main/java/org/distorted/objects/TwistyJing.java
index 6804f3b7..47e7efd8 100644
--- a/src/main/java/org/distorted/objects/TwistyJing.java
+++ b/src/main/java/org/distorted/objects/TwistyJing.java
@@ -40,7 +40,9 @@ import java.util.Random;
 
 public class TwistyJing extends TwistyObject
 {
-  static final float F = 0.24f;
+  static final float F = 0.24f;  // length of the edge of the corner cubit divided by
+                                 // the length of the edge of the whole tetrahedron.
+                                 // keep < 0.25.
 
   static final Static3D[] ROT_AXIS = new Static3D[]
          {