X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FTime%2Fmoonpos.cxx;h=516048ddb92523e1e18d963089198dbefeb8f540;hb=cc3d0221ea5fb1def56f53305560829fc66c2ab6;hp=ca6c7abfdcf521c1bb2fc63409e9b75833a440f3;hpb=0ffa19cd32c02405d0e740393b37f4009ed5a312;p=flightgear.git

diff --git a/src/Time/moonpos.cxx b/src/Time/moonpos.cxx
index ca6c7abfd..516048ddb 100644
--- a/src/Time/moonpos.cxx
+++ b/src/Time/moonpos.cxx
@@ -1,5 +1,6 @@
-// moonpos.cxx (basically, this is a slightly modified version of the 'sunpos.cxx' file, adapted from XEarth)
-
+// moonpos.cxx (basically, this is a slightly modified version of the
+// 'sunpos.cxx' file, adapted from XEarth)
+//
 // kirk johnson
 // july 1993
 //
@@ -41,7 +42,7 @@
 
 #include <simgear/compiler.h>
 
-#ifdef FG_HAVE_STD_INCLUDES
+#ifdef SG_HAVE_STD_INCLUDES
 #  include <cmath>
 #  include <cstdio>
 #  include <ctime>
@@ -54,20 +55,19 @@
 #include <simgear/constants.h>
 #include <simgear/debug/logstream.hxx>
 #include <simgear/ephemeris/ephemeris.hxx>
-#include <simgear/math/fg_geodesy.hxx>
 #include <simgear/math/point3d.hxx>
 #include <simgear/math/polar3d.hxx>
+#include <simgear/math/sg_geodesy.hxx>
 #include <simgear/math/vector.hxx>
 #include <simgear/timing/sg_time.hxx>
 
-#include <Main/views.hxx>
+#include <Main/globals.hxx>
+#include <Main/viewer.hxx>
 #include <Scenery/scenery.hxx>
+#include <Time/light.hxx>
 
 #include "moonpos.hxx"
 
-// extern SolarSystem *solarSystem;
-extern FGEphemeris *ephem;
-
 #undef E
 
 
@@ -87,10 +87,10 @@ extern FGEphemeris *ephem;
 /*
  * assuming the apparent orbit of the moon about the earth is circular,
  * the rate at which the orbit progresses is given by RadsPerDay --
- * FG_2PI radians per orbit divided by 365.242191 days per year:
+ * SG_2PI radians per orbit divided by 365.242191 days per year:
  */
 
-#define RadsPerDay (FG_2PI/365.242191)
+#define RadsPerDay (SG_2PI/365.242191)
 
 /*
  * details of moon's apparent orbit at epoch 1990.0 (after
@@ -101,8 +101,8 @@ extern FGEphemeris *ephem;
  * Eccentricity (eccentricity of orbit)                0.016713
  */
 
-#define Epsilon_g    (279.403303*(FG_2PI/360))
-#define OmegaBar_g   (282.768422*(FG_2PI/360))
+#define Epsilon_g    (279.403303*(SGD_2PI/360))
+#define OmegaBar_g   (282.768422*(SGD_2PI/360))
 #define Eccentricity (0.016713)
 
 /*
@@ -110,7 +110,7 @@ extern FGEphemeris *ephem;
  * 1990.0 (computed as 23.440592 degrees according to the method given
  * in duffett-smith, section 27)
  */
-#define MeanObliquity (23.440592*(FG_2PI/360))
+#define MeanObliquity (23.440592*(SGD_2PI/360))
 
 /* static double solve_keplers_equation(double); */
 /* static double moon_ecliptic_longitude(time_t); */
@@ -151,11 +151,11 @@ static double moon_ecliptic_longitude(time_t ssue) {
     D = DaysSinceEpoch(ssue);
 
     N = RadsPerDay * D;
-    N = fmod(N, FG_2PI);
-    if (N < 0) N += FG_2PI;
+    N = fmod(N, SG_2PI);
+    if (N < 0) N += SG_2PI;
 
     M_moon = N + Epsilon_g - OmegaBar_g;
-    if (M_moon < 0) M_moon += FG_2PI;
+    if (M_moon < 0) M_moon += SG_2PI;
 
     E = solve_keplers_equation(M_moon);
     v = 2 * atan(sqrt((1+Eccentricity)/(1-Eccentricity)) * tan(E/2));
@@ -202,7 +202,7 @@ static double julian_date(int y, int m, int d) {
 
     /* lazy test to ensure gregorian calendar */
     if (y < 1583) {
-	FG_LOG( FG_EVENT, FG_ALERT, 
+	SG_LOG( SG_EVENT, SG_ALERT, 
 		"WHOOPS! Julian dates only valid for 1582 oct 15 or later" );
     }
 
@@ -283,15 +283,15 @@ void fgMoonPosition(time_t ssue, double *lon, double *lat) {
      * every ten minutes. (Comment added by Durk Talsma).
      ************************************************************************/
 
-    ecliptic_to_equatorial( ephem->get_moon()->getLon(),
+    ecliptic_to_equatorial( globals->get_ephem()->get_moon()->getLon(),
 			    0.0, &alpha, &delta );
-    tmp = alpha - (FG_2PI/24)*GST(ssue);
-    if (tmp < -FG_PI) {
-	do tmp += FG_2PI;
-	while (tmp < -FG_PI);
-    } else if (tmp > FG_PI) {
-	do tmp -= FG_2PI;
-	while (tmp < -FG_PI);
+    tmp = alpha - (SGD_2PI/24)*GST(ssue);
+    if (tmp < -SGD_PI) {
+	do tmp += SGD_2PI;
+	while (tmp < -SGD_PI);
+    } else if (tmp > SGD_PI) {
+	do tmp -= SGD_2PI;
+	while (tmp < -SGD_PI);
     }
 
     *lon = tmp;
@@ -315,18 +315,18 @@ static void fgMoonPositionGST(double gst, double *lon, double *lat) {
     /* lambda = moon_ecliptic_longitude(ssue); */
     /* ecliptic_to_equatorial(lambda, 0.0, &alpha, &delta); */
     //ecliptic_to_equatorial (solarPosition.lonMoon, 0.0, &alpha, &delta);
-    ecliptic_to_equatorial( ephem->get_moon()->getLon(),
-			    ephem->get_moon()->getLat(), 
+    ecliptic_to_equatorial( globals->get_ephem()->get_moon()->getLon(),
+			    globals->get_ephem()->get_moon()->getLat(), 
 			    &alpha,  &delta );
 
-//    tmp = alpha - (FG_2PI/24)*GST(ssue);
-    tmp = alpha - (FG_2PI/24)*gst;	
-    if (tmp < -FG_PI) {
-	do tmp += FG_2PI;
-	while (tmp < -FG_PI);
-    } else if (tmp > FG_PI) {
-	do tmp -= FG_2PI;
-	while (tmp < -FG_PI);
+//    tmp = alpha - (SG_2PI/24)*GST(ssue);
+    tmp = alpha - (SGD_2PI/24)*gst;	
+    if (tmp < -SGD_PI) {
+	do tmp += SGD_2PI;
+	while (tmp < -SGD_PI);
+    } else if (tmp > SGD_PI) {
+	do tmp -= SGD_2PI;
+	while (tmp < -SGD_PI);
     }
 
     *lon = tmp;
@@ -336,49 +336,55 @@ static void fgMoonPositionGST(double gst, double *lon, double *lat) {
 
 // update the cur_time_params structure with the current moon position
 void fgUpdateMoonPos( void ) {
-    fgLIGHT *l;
-    SGTime *t;
-    FGView *v;
-    sgVec3 nup, nmoon, v0, surface_to_moon;
-    Point3D p, rel_moonpos;
+    sgVec3 nup, nmoon;
+    Point3D rel_moonpos;
     double dot, east_dot;
     double moon_gd_lat, sl_radius;
 
-    l = &cur_light_params;
-    t = SGTime::cur_time_params;
-    v = &current_view;
+    // vector in cartesian coordinates from current position to the
+    // postion on the earth's surface the moon is directly over
+    sgVec3 to_moon;
+  
+    // surface direction to go to head towards moon
+    sgVec3 surface_to_moon;
 
-    FG_LOG( FG_EVENT, FG_INFO, "  Updating Moon position" );
+    FGLight *l = (FGLight *)(globals->get_subsystem("lighting"));
+    SGTime *t = globals->get_time_params();
+    FGViewer *v = globals->get_current_view();
 
-    // (not sure why there was two)
-    // fgMoonPosition(t->cur_time, &l->moon_lon, &moon_gd_lat);
-    fgMoonPositionGST(t->getGst(), &l->moon_lon, &moon_gd_lat);
+    SG_LOG( SG_EVENT, SG_INFO, "  Updating Moon position" );
 
-    fgGeodToGeoc(moon_gd_lat, 0.0, &sl_radius, &l->moon_gc_lat);
+    double moon_l;
+    fgMoonPositionGST(t->getGst(), &moon_l, &moon_gd_lat);
+    l->set_moon_lon(moon_l);
 
-    p = Point3D( l->moon_lon, l->moon_gc_lat, sl_radius );
-    l->fg_moonpos = fgPolarToCart3d(p);
+    sgGeodToGeoc(moon_gd_lat, 0.0, &sl_radius, &moon_l);
+    l->set_moon_gc_lat(moon_l);
 
-    FG_LOG( FG_EVENT, FG_INFO, "    t->cur_time = " << t->get_cur_time() );
-    FG_LOG( FG_EVENT, FG_INFO, 
+    Point3D p = Point3D( l->get_moon_lon(), l->get_moon_gc_lat(), sl_radius );
+    l->set_moonpos( sgPolarToCart3d(p) );
+
+    SG_LOG( SG_EVENT, SG_INFO, "    t->cur_time = " << t->get_cur_time() );
+    SG_LOG( SG_EVENT, SG_INFO, 
 	    "    Moon Geodetic lat = " << moon_gd_lat
-	    << " Geocentric lat = " << l->moon_gc_lat );
+	    << " Geocentric lat = " << l->get_moon_gc_lat() );
 
     // update the sun light vector
-    sgSetVec4( l->moon_vec,
-	       l->fg_moonpos.x(), l->fg_moonpos.y(), l->fg_moonpos.z(), 0.0 );
-    sgNormalizeVec4( l->moon_vec );
-    sgCopyVec4( l->moon_vec_inv, l->moon_vec );
-    sgNegateVec4( l->moon_vec_inv );
+    sgSetVec4( l->moon_vec(), l->get_moonpos().x(),
+	       l->get_moonpos().y(), l->get_moonpos().z(), 0.0 );
+    sgNormalizeVec4( l->moon_vec() );
+    sgCopyVec4( l->moon_vec_inv(), l->moon_vec() );
+    sgNegateVec4( l->moon_vec_inv() );
 
     // make sure these are directional light sources only
-    l->moon_vec[3] = l->moon_vec_inv[3] = 0.0;
+    l->moon_vec()[3] = l->moon_vec_inv()[3] = 0.0;
     // cout << "  l->moon_vec = " << l->moon_vec[0] << "," << l->moon_vec[1]
     //      << ","<< l->moon_vec[2] << endl;
 
     // calculate the moon's relative angle to local up
-    sgCopyVec3( nup, v->get_local_up() );
-    sgSetVec3( nmoon, l->fg_moonpos.x(), l->fg_moonpos.y(), l->fg_moonpos.z() );
+    sgCopyVec3( nup, v->get_world_up() );
+    sgSetVec3( nmoon, l->get_moonpos().x(),
+               l->get_moonpos().y(), l->get_moonpos().z() );
     sgNormalizeVec3(nup);
     sgNormalizeVec3(nmoon);
     // cout << "nup = " << nup[0] << "," << nup[1] << "," 
@@ -386,29 +392,26 @@ void fgUpdateMoonPos( void ) {
     // cout << "nmoon = " << nmoon[0] << "," << nmoon[1] << "," 
     //      << nmoon[2] << endl;
 
-    l->moon_angle = acos( sgScalarProductVec3( nup, nmoon ) );
-    cout << "moon angle relative to current location = " 
-	 << l->moon_angle << endl;
+    l->set_moon_angle( acos( sgScalarProductVec3( nup, nmoon ) ) );
+    SG_LOG( SG_EVENT, SG_INFO, "moon angle relative to current location = " 
+	    << l->get_moon_angle() );
     
     // calculate vector to moon's position on the earth's surface
-    rel_moonpos = l->fg_moonpos - (v->get_view_pos() + scenery.center);
-    v->set_to_moon( rel_moonpos.x(), rel_moonpos.y(), rel_moonpos.z() );
+    Point3D vp( v->get_view_pos()[0],
+		v->get_view_pos()[1],
+		v->get_view_pos()[2] );
+    rel_moonpos = l->get_moonpos()-(vp + globals->get_scenery()->get_center());
+    sgSetVec3( to_moon, rel_moonpos.x(), rel_moonpos.y(), rel_moonpos.z() );
     // printf( "Vector to moon = %.2f %.2f %.2f\n",
-    //         v->to_moon[0], v->to_moon[1], v->to_moon[2]);
-
-    // make a vector to the current view position
-    Point3D view_pos = v->get_view_pos();
-    sgSetVec3( v0, view_pos.x(), view_pos.y(), view_pos.z() );
+    //         to_moon[0], to_moon[1], to_moon[2]);
 
     // Given a vector from the view position to the point on the
     // earth's surface the moon is directly over, map into onto the
     // local plane representing "horizontal".
 
-    sgmap_vec_onto_cur_surface_plane( v->get_local_up(), v0, 
-				      v->get_to_moon(), surface_to_moon );
+    sgmap_vec_onto_cur_surface_plane( v->get_world_up(), v->get_view_pos(), 
+				      to_moon, surface_to_moon );
     sgNormalizeVec3(surface_to_moon);
-    v->set_surface_to_moon( surface_to_moon[0], surface_to_moon[1], 
-			    surface_to_moon[2] );
     // cout << "(sg) Surface direction to moon is "
     //   << surface_to_moon[0] << "," 
     //   << surface_to_moon[1] << ","
@@ -420,7 +423,7 @@ void fgUpdateMoonPos( void ) {
     // v->surface_east.  We do this so we can sort out the acos()
     // ambiguity.  I wish I could think of a more efficient way ... :-(
     east_dot = sgScalarProductVec3( surface_to_moon, v->get_surface_east() );
-   // cout << "  East dot product = " << east_dot << endl;
+    // cout << "  East dot product = " << east_dot << endl;
 
     // calculate the angle between v->surface_to_moon and
     // v->surface_south.  this is how much we have to rotate the sky
@@ -429,12 +432,12 @@ void fgUpdateMoonPos( void ) {
     // cout << "  Dot product = " << dot << endl;
 
     if ( east_dot >= 0 ) {
-	l->moon_rotation = acos(dot);
+	l->set_moon_rotation( acos(dot) );
     } else {
-	l->moon_rotation = -acos(dot);
+	l->set_moon_rotation( -acos(dot) );
     }
     // cout << "  Sky needs to rotate = " << angle << " rads = "
-    //      << angle * RAD_TO_DEG << " degrees." << endl;
+    //      << angle * SGD_RADIANS_TO_DEGREES << " degrees." << endl;
 }