From df0f0a531fcc9a2dd157c40f4953700bbfca1268 Mon Sep 17 00:00:00 2001
From: mfranz <mfranz>
Date: Fri, 19 Dec 2008 13:37:54 +0000
Subject: [PATCH] export absolute viewer coordinates

---
 src/Main/viewmgr.cxx | 7 +++++++
 src/Main/viewmgr.hxx | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/src/Main/viewmgr.cxx b/src/Main/viewmgr.cxx
index 806d9451a..75785e1c3 100644
--- a/src/Main/viewmgr.cxx
+++ b/src/Main/viewmgr.cxx
@@ -212,6 +212,9 @@ FGViewMgr::bind ()
 	&FGViewMgr::getNear_m, &FGViewMgr::setNear_m);
   fgSetArchivable("/sim/current-view/ground-level-nearplane-m");
 
+  fgTie("/sim/current-view/viewer-x-m", this, &FGViewMgr::getViewerPositionX_m);
+  fgTie("/sim/current-view/viewer-y-m", this, &FGViewMgr::getViewerPositionY_m);
+  fgTie("/sim/current-view/viewer-z-m", this, &FGViewMgr::getViewerPositionZ_m);
 }
 
 void
@@ -229,6 +232,9 @@ FGViewMgr::unbind ()
   fgUntie("/sim/current-view/axes/long");
   fgUntie("/sim/current-view/axes/lat");
   fgUntie("/sim/current-view/ground-level-nearplane-m");
+  fgUntie("/sim/current-view/viewer-x-m");
+  fgUntie("/sim/current-view/viewer-y-m");
+  fgUntie("/sim/current-view/viewer-z-m");
 }
 
 void
@@ -287,6 +293,7 @@ FGViewMgr::update (double dt)
   // Update the current view
   do_axes();
   view->update(dt);
+  abs_viewer_position = loop_view->getViewPosition();
 }
 
 void
diff --git a/src/Main/viewmgr.hxx b/src/Main/viewmgr.hxx
index f59371568..f3b85136d 100644
--- a/src/Main/viewmgr.hxx
+++ b/src/Main/viewmgr.hxx
@@ -147,11 +147,15 @@ private:
     void setViewAxisLat (double axis);
     int getView () const;
     void setView (int newview);
+    double getViewerPositionX_m () const { return abs_viewer_position[0]; }
+    double getViewerPositionY_m () const { return abs_viewer_position[1]; }
+    double getViewerPositionZ_m () const { return abs_viewer_position[2]; }
 
     SGPropertyNode_ptr view_number;
     vector<SGPropertyNode_ptr> config_list;
     typedef vector<SGSharedPtr<FGViewer> > viewer_list;
     viewer_list views;
+    SGVec3d abs_viewer_position;
 
     int current;