Undo/redo fully working

Normand Briere

2019-06-11 1d909ffa0c2beb51d453b53b845c4f3a749ca5f0

 Bone.java
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@@ -26,7 +26,7 @@
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  */
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 import javax.media.j3d.*;
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-import javax.vecmath.*;
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+//import javax.vecmath.*;
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 import java.util.*;
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