From 85fba1325a030903c93d13db6d8b296c5b13f8bb Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Thu, 5 Nov 2009 12:48:16 +0000
Subject: [PATCH] pass the geodetic position and view orientation to the sky
 reposition function

---
 simgear/scene/sky/sky.cxx | 21 ++++++++++++++++-----
 simgear/scene/sky/sky.hxx |  6 ++++--
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/simgear/scene/sky/sky.cxx b/simgear/scene/sky/sky.cxx
index 5367550b..2eec5cc3 100644
--- a/simgear/scene/sky/sky.cxx
+++ b/simgear/scene/sky/sky.cxx
@@ -147,15 +147,27 @@ bool SGSky::reposition( const SGSkyState &st, const SGEphemeris& eph, double dt
     double angle = st.gst * 15;	// degrees
     double angleRad = SGMiscd::deg2rad(angle);
 
-    dome->reposition( st.zero_elev, st.alt, st.lon, st.lat, st.spin );
+    SGVec3f view_pos, zero_elev, view_up;
+    double lon, lat, alt;
+
+    view_pos = toVec3f( SGVec3d::fromGeod(st.pos) );
+    SGGeod geodZeroViewPos = SGGeod::fromGeodM(st.pos, 0);
+    zero_elev = toVec3f( SGVec3d::fromGeod(geodZeroViewPos) );
+
+    view_up = toVec3f( st.ori.backTransform(SGVec3d::e2()) );
+    lon = st.pos.getLongitudeRad();
+    lat = st.pos.getLatitudeRad();
+    alt = st.pos.getElevationM();
+
+    dome->reposition( zero_elev, alt, lon, lat, st.spin );
 
     osg::Matrix m = osg::Matrix::rotate(angleRad, osg::Vec3(0, 0, -1));
-    m.postMultTranslate(toOsg(st.view_pos));
+    m.postMultTranslate(toOsg(view_pos));
     _ephTransform->setMatrix(m);
 
     double sun_ra = eph.getSunRightAscension();
     double sun_dec = eph.getSunDeclination();
-    oursun->reposition( sun_ra, sun_dec, st.sun_dist, st.lat, st.alt, st.sun_angle );
+    oursun->reposition( sun_ra, sun_dec, st.sun_dist, lat, alt, st.sun_angle );
 
     double moon_ra = eph.getMoonRightAscension();
     double moon_dec = eph.getMoonDeclination();
@@ -163,8 +175,7 @@ bool SGSky::reposition( const SGSkyState &st, const SGEphemeris& eph, double dt
 
     for ( unsigned i = 0; i < cloud_layers.size(); ++i ) {
         if ( cloud_layers[i]->getCoverage() != SGCloudLayer::SG_CLOUD_CLEAR ) {
-            cloud_layers[i]->reposition( st.zero_elev, st.view_up,
-                                         st.lon, st.lat, st.alt, dt );
+            cloud_layers[i]->reposition( zero_elev, view_up, lon, lat, alt, dt);
         } else
           cloud_layers[i]->getNode()->setAllChildrenOff();
     }
diff --git a/simgear/scene/sky/sky.hxx b/simgear/scene/sky/sky.hxx
index 6590c03f..1f1190f8 100644
--- a/simgear/scene/sky/sky.hxx
+++ b/simgear/scene/sky/sky.hxx
@@ -45,6 +45,7 @@
 #include <osg/Switch>
 
 #include <simgear/ephemeris/ephemeris.hxx>
+#include <simgear/math/SGMath.hxx>
 
 #include <simgear/scene/sky/cloud.hxx>
 #include <simgear/scene/sky/dome.hxx>
@@ -56,8 +57,9 @@ using std::vector;
 
 
 typedef struct {
-	SGVec3f view_pos, zero_elev, view_up;
-	double lon, lat, alt, spin;
+        SGGeod pos;
+        SGQuatd ori;
+        double spin;
 	double gst;
 	double sun_dist;
 	double moon_dist;
-- 
2.39.5