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diff --git a/Stars45/TrackIR.h b/Stars45/TrackIR.h
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+/*  Starshatter OpenSource Distribution
+    Copyright (c) 1997-2004, Destroyer Studios LLC.
+    All Rights Reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name "Destroyer Studios" nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+
+    SUBSYSTEM:    Stars.exe
+    FILE:         TrackIR.h
+    AUTHOR:       John DiCamillo
+
+
+    OVERVIEW
+    ========
+    TrackIR head tracker interface class
+*/
+
+#ifndef TrackIR_h
+#define TrackIR_h
+
+#include "Types.h"
+
+// +--------------------------------------------------------------------+
+
+class TrackIR
+{
+public:
+    TrackIR();
+    ~TrackIR();
+
+    DWORD    ExecFrame();
+
+    bool     IsRunning()    const { return running; }
+    double   GetAzimuth()   const { return az; }
+    double   GetElevation() const { return el; }
+
+    double   GetX()         const { return x;  }
+    double   GetY()         const { return y;  }
+    double   GetZ()         const { return z;  }
+
+protected:
+
+    bool     running;
+    DWORD    stale_frames;
+    DWORD    frame_signature;
+
+    double   az;
+    double   el;
+
+    double   x; // vrt
+    double   y; // vup
+    double   z; // vpn (i think)
+};
+
+#endif TrackIR_h
+