From a8d8c9d24eac8894d040069735d59c4ee6ad481c Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Mon, 6 Mar 2000 22:27:52 +0000
Subject: [PATCH] Working on ssg-ifying the sky dome.  Added the moon and other
 various tweaks.

---
 simgear/ephemeris/ephemeris.cxx   |   3 +
 simgear/ephemeris/ephemeris.hxx   |   9 ++
 simgear/ephemeris/moon.cxx        |  26 +++++-
 simgear/ephemeris/moon.hxx        |  32 ++++---
 simgear/ephemeris/solarsystem.cxx |   6 +-
 simgear/ephemeris/star.cxx        | 147 +-----------------------------
 simgear/ephemeris/star.hxx        |   6 +-
 7 files changed, 62 insertions(+), 167 deletions(-)

diff --git a/simgear/ephemeris/ephemeris.cxx b/simgear/ephemeris/ephemeris.cxx
index 1469c28f..86a6047e 100644
--- a/simgear/ephemeris/ephemeris.cxx
+++ b/simgear/ephemeris/ephemeris.cxx
@@ -28,12 +28,14 @@
 // Constructor
 FGEphemeris::FGEphemeris( void ) {
     our_sun = new Star;
+    moon = new Moon;
 }
 
 
 // Destructor
 FGEphemeris::~FGEphemeris( void ) {
     delete our_sun;
+    delete moon;
 }
 
 
@@ -41,5 +43,6 @@ FGEphemeris::~FGEphemeris( void ) {
 // time
 void FGEphemeris::update( FGTime *t ) {
     our_sun->updatePosition( t );
+    moon->updatePosition( t, our_sun );
 }
 
diff --git a/simgear/ephemeris/ephemeris.hxx b/simgear/ephemeris/ephemeris.hxx
index c681fcc1..59c876f0 100644
--- a/simgear/ephemeris/ephemeris.hxx
+++ b/simgear/ephemeris/ephemeris.hxx
@@ -29,11 +29,13 @@
 #include <Time/fg_time.hxx>
 
 #include "star.hxx"
+#include "moon.hxx"
 
 
 class FGEphemeris {
 
     Star *our_sun;
+    Moon *moon;
 
 public:
 
@@ -55,6 +57,13 @@ public:
 	return our_sun->getDeclination();
     }
 
+    // moon position
+    inline double getMoonRightAscension() {
+	return moon->getRightAscension();
+    }
+    inline double getMoonDeclination() {
+	return moon->getDeclination();
+    }
 };
 
 
diff --git a/simgear/ephemeris/moon.cxx b/simgear/ephemeris/moon.cxx
index c36b076a..78fbc886 100644
--- a/simgear/ephemeris/moon.cxx
+++ b/simgear/ephemeris/moon.cxx
@@ -40,6 +40,7 @@
 
 #include "moon.hxx"
 
+
 /*************************************************************************
  * Moon::Moon(FGTime *t)
  * Public constructor for class Moon. Initializes the orbital elements and 
@@ -56,6 +57,7 @@ Moon::Moon(FGTime *t) :
 		0.054900,  0.000000,
 		115.3654,  13.0649929509, t)
 {
+#if 0
   int width, height;
   
   FG_LOG( FG_GENERAL, FG_INFO, "Initializing Moon Texture");
@@ -125,16 +127,29 @@ Moon::Moon(FGTime *t) :
 		GL_RGBA, GL_UNSIGNED_BYTE,
 		moon_halotexbuf);
   moonObject = gluNewQuadric();
+#endif
 }
 
+Moon::Moon() :
+  CelestialBody(125.1228, -0.0529538083,
+		5.1454,    0.00000,
+		318.0634,  0.1643573223,
+		60.266600, 0.000000,
+		0.054900,  0.000000,
+		115.3654,  13.0649929509)
+{
+}
+
+
 Moon::~Moon()
 {
-  //delete moonObject;
-  delete moon_texbuf;
-  delete moon_halotexbuf;
+    //delete moonObject;
+    // delete moon_texbuf;
+    // delete moon_halotexbuf;
 }
 
 
+#if 0
 static int texWidth = 256;	/* 64x64 is plenty */
 
 void Moon::setHalo()
@@ -182,6 +197,7 @@ void Moon::setHalo()
   //	    GL_UNSIGNED_BYTE, textureBuf);
   //free(textureBuf);
 }
+#endif
 
 
 /*****************************************************************************
@@ -255,7 +271,7 @@ void Moon::updatePosition(FGTime *t, Star *ourSun)
   r += (-0.58 * cos(M - 2*D)
 	-0.46 * cos(2*D)
 	);
-  FG_LOG(FG_GENERAL, FG_INFO, "Running moon update");
+  // FG_LOG(FG_GENERAL, FG_INFO, "Running moon update");
   xg = r * cos(lonEcl) * cos(latEcl);
   yg = r * sin(lonEcl) * cos(latEcl);
   zg = r *               sin(latEcl);
@@ -308,6 +324,7 @@ void Moon::updatePosition(FGTime *t, Star *ourSun)
 }
 
 
+#if 0
 /************************************************************************
  * void Moon::newImage()
  *
@@ -396,3 +413,4 @@ void Moon::newImage()
     {
     }
 }
+#endif
diff --git a/simgear/ephemeris/moon.hxx b/simgear/ephemeris/moon.hxx
index 619c159f..bb8b083f 100644
--- a/simgear/ephemeris/moon.hxx
+++ b/simgear/ephemeris/moon.hxx
@@ -24,6 +24,7 @@
 #ifndef _MOON_HXX_
 #define _MOON_HXX_
 
+
 #include <simgear/constants.h>
 
 #include <Aircraft/aircraft.hxx>
@@ -35,22 +36,27 @@
 
 class Moon : public CelestialBody
 {
+
 private:
-  void TexInit();  // This should move to the constructor eventually.
-
-  GLUquadricObj *moonObject;
-  GLuint Sphere;
-  GLuint moon_texid;
-  GLuint moon_halotexid;
-  GLubyte *moon_texbuf;
-  GLubyte *moon_halotexbuf;
+
+    // void TexInit();  // This should move to the constructor eventually.
+
+    // GLUquadricObj *moonObject;
+    // GLuint Sphere;
+    // GLuint moon_texid;
+    // GLuint moon_halotexid;
+    // GLubyte *moon_texbuf;
+    // GLubyte *moon_halotexbuf;
   
-  void setHalo();
+    // void setHalo();
+
 public:
-  Moon ( FGTime *t);
-  ~Moon();
-  void updatePosition(FGTime *t, Star *ourSun);
-  void newImage();
+
+    Moon( FGTime *t);
+    Moon();
+    ~Moon();
+    void updatePosition(FGTime *t, Star *ourSun);
+    // void newImage();
 };
 
 
diff --git a/simgear/ephemeris/solarsystem.cxx b/simgear/ephemeris/solarsystem.cxx
index 75c5f007..35692e4c 100644
--- a/simgear/ephemeris/solarsystem.cxx
+++ b/simgear/ephemeris/solarsystem.cxx
@@ -106,7 +106,8 @@ void SolarSystem::rebuild()
   double magnitude;
   //GLfloat ambient;
   //GLfloat amb[4];
-  
+
+#if 0  
   glDisable(GL_LIGHTING);
 
   // Step 1: update all the positions
@@ -155,6 +156,7 @@ void SolarSystem::rebuild()
     xglEnable(GL_LIGHTING);
   }
   xglEndList();
+#endif
 }
 
 /*****************************************************************************
@@ -193,6 +195,7 @@ void SolarSystem::addPlanetToList(double ra, double dec, double magn)
 
   fgLIGHT *l = &cur_light_params;
 
+#if 0
   if ((double) (l->sun_angle - FG_PI_2) > 
       ((magnitude - 1.0) * - 20 * DEG_TO_RAD)) 
     {
@@ -201,6 +204,7 @@ void SolarSystem::addPlanetToList(double ra, double dec, double magn)
 		   50000.0 * sin (ra) * cos (dec),
 		   50000.0 * sin (dec));
     }
+#endif
 }
 
 
diff --git a/simgear/ephemeris/star.cxx b/simgear/ephemeris/star.cxx
index c036521a..5e1a4431 100644
--- a/simgear/ephemeris/star.cxx
+++ b/simgear/ephemeris/star.cxx
@@ -22,6 +22,7 @@
  * $Id$
  **************************************************************************/
 
+
 #ifdef __BORLANDC__
 #  define exception c_exception
 #endif
@@ -35,6 +36,7 @@
 
 #include "star.hxx"
 
+
 /*************************************************************************
  * Star::Star(FGTime *t)
  * Public constructor for class Star
@@ -68,67 +70,11 @@ Star::Star() :
 
 Star::~Star()
 {
-#if 0
-  //delete SunObject;
-  delete [] sun_texbuf;
-#endif
-}
-
-
-
-#if 0
-static int texWidth = 256;	/* 64x64 is plenty */
-
-void Star::setTexture()
-{
-  int texSize;
-  //void *textureBuf;
-  GLubyte *p;
-  int i,j;
-  double radius;
-  
-  texSize = texWidth*texWidth;
-  
-  sun_texbuf = new GLubyte[texSize*4];
-  if (!sun_texbuf) 
-    return;  // Ugly!
-  
-  p = sun_texbuf;
-  
-  radius = (double)(texWidth / 2);
-  
-  for (i=0; i < texWidth; i++) {
-    for (j=0; j < texWidth; j++) {
-      double x, y, d;
-	    
-      *p = 0xff;
-      *(p+1) = 0xff;
-      *(p+2) = 0xff;
-
-      x = fabs((double)(i - (texWidth / 2)));
-      y = fabs((double)(j - (texWidth / 2)));
-
-      d = sqrt((x * x) + (y * y));
-      if (d < radius) {
-	  double t = 1.0 - (d / radius); // t is 1.0 at center, 0.0 at edge */
-	  // inverse square looks nice 
-	  *(p+3) = (int)((double) 0xff * (t*t));
-      } else {
-	  *(p+3) = 0x00;
-      }
-      p += 4;
-    }
-  }
-  //gluBuild2DMipmaps(GL_TEXTURE_2D, 1, texWidth, texWidth, 
-  //	    GL_LUMINANCE,
-  //	    GL_UNSIGNED_BYTE, textureBuf);
-  //free(textureBuf);
 }
-#endif
 
 
 /*************************************************************************
- * void Jupiter::updatePosition(FGTime *t, Star *ourSun)
+ * void Star::updatePosition(FGTime *t, Star *ourSun)
  * 
  * calculates the current position of our sun.
  *************************************************************************/
@@ -169,90 +115,3 @@ void Star::updatePosition(FGTime *t)
   rightAscension = atan2 (ye, xe);
   declination = atan2 (ze, sqrt (xe*xe + ye*ye));
 }
-
-
-#if 0  
-void Star::newImage(void)
-{
-  /*static float stars[3];
-  stars[0] = 0.0;
-  stars[1] = 0.0;
-  stars[2] = 1.0;*/
-
-  fgLIGHT *l = &cur_light_params;
-  float sun_angle = l->sun_angle;
-  
-  if( sun_angle*RAD_TO_DEG < 100 ) { // else no need to draw sun
-    
-    
-    double x_2, x_4, x_8, x_10;
-    GLfloat ambient;
-    GLfloat amb[4];
-    int sun_size = 550;
-    
-    // daily variation sun gets larger near horizon
-    /*if(sun_angle*RAD_TO_DEG > 84.0 && sun_angle*RAD_TO_DEG < 95)
-      {
-      double sun_grow = 9*fabs(94-sun_angle*RAD_TO_DEG);
-      sun_size = (int)(sun_size + sun_size * cos(sun_grow*DEG_TO_RAD));
-      }*/
-    x_2 = sun_angle * sun_angle;
-    x_4 = x_2 * x_2;
-    x_8 = x_4 * x_4;
-    x_10 = x_8 * x_2;
-    ambient = (float)(0.4 * pow (1.1, - x_10 / 30.0));
-    if (ambient < 0.3) ambient = 0.3;
-    if (ambient > 1.0) ambient = 1.0;
-    
-    amb[0] = ((ambient * 6.0)  - 1.0); // minimum value = 0.8
-    amb[1] = ((ambient * 11.0) - 3.0); // minimum value = 0.3
-    amb[2] = ((ambient * 12.0) - 3.6); // minimum value = 0.0
-    amb[3] = 1.00;
-    
-    if (amb[0] > 1.0) amb[0] = 1.0;
-    if (amb[1] > 1.0) amb[1] = 1.0;
-    if (amb[2] > 1.0) amb[2] = 1.0;
-    xglColor3fv(amb);
-    glPushMatrix();
-    {
-      xglRotatef(((RAD_TO_DEG * rightAscension)- 90.0), 0.0, 0.0, 1.0);
-      xglRotatef((RAD_TO_DEG * declination), 1.0, 0.0, 0.0);
-      xglTranslatef(0,60000,0);
-      if (current_options.get_textures())
-	{
-	  glEnable(GL_TEXTURE_2D); // TEXTURE ENABLED
-	  glEnable(GL_BLEND);	// BLEND ENABLED
-	  
-	  // glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
-	  glBlendFunc ( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ) ;
-	  glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);  
-	  glBindTexture(GL_TEXTURE_2D, sun_texid);
-
-	  glBegin(GL_QUADS);
-	  glTexCoord2f(0.0f, 0.0f); glVertex3f(-5000, 0.0, -5000);
-	  glTexCoord2f(1.0f, 0.0f); glVertex3f( 5000, 0.0, -5000);
-	  glTexCoord2f(1.0f, 1.0f); glVertex3f( 5000, 0.0,  5000);
-	  glTexCoord2f(0.0f, 1.0f); glVertex3f(-5000, 0.0,  5000);
-	  glEnd();
-	}
-      xglDisable(GL_TEXTURE_2D); // TEXTURE DISABLED
-      xglDisable(GL_BLEND);	// BLEND DISABLED
-    }
-
-    glPopMatrix();
-    glDisable(GL_LIGHTING);	// LIGHTING DISABLED
-    glDisable(GL_BLEND);	// BLEND DISABLED
-    glPushMatrix();
-    {     
-      xglRotatef(((RAD_TO_DEG * rightAscension)- 90.0), 0.0, 0.0, 1.0);
-      xglRotatef((RAD_TO_DEG * declination), 1.0, 0.0, 0.0);
-      xglColor4fv(amb);
-      xglTranslatef(0,60000,0);
-      gluSphere( SunObject,  sun_size, 10, 10 );
-      }
-    glPopMatrix();
-    glDisable(GL_TEXTURE_2D);	// TEXTURE DISABLED
-    glDisable(GL_BLEND);	// BLEND DISABLED  
-  }
-}
-#endif
diff --git a/simgear/ephemeris/star.hxx b/simgear/ephemeris/star.hxx
index 1a46c650..38786541 100644
--- a/simgear/ephemeris/star.hxx
+++ b/simgear/ephemeris/star.hxx
@@ -24,6 +24,7 @@
 #ifndef _STAR_HXX_
 #define _STAR_HXX_
 
+
 #include <Time/fg_time.hxx>
 #include "celestialBody.hxx"
 
@@ -35,10 +36,6 @@ private:
 
     double xs, ys;     // the sun's rectangular geocentric coordinates
     double distance;   // the sun's distance to the earth
-    // GLUquadricObj *SunObject;
-    // GLuint sun_texid;
-    // GLubyte *sun_texbuf;
-    // void setTexture();
 
 public:
 
@@ -52,7 +49,6 @@ public:
     double getxs();
     double getys();
     double getDistance();
-    // void newImage();
 };
 
 
-- 
2.39.5