**************************************************************************/
+#ifdef WIN32
+# include <windows.h>
+#endif
+
+#include <GL/glut.h>
+#include <XGL/xgl.h>
+
#include <Time/fg_time.h>
#include <Astro/orbits.h>
#include <Astro/planets.h>
#include <Astro/sun.h>
+#include <Include/fg_constants.h>
+#include <Main/fg_debug.h>
+GLint planets = 0;
struct CelestialCoord fgCalculatePlanet(struct OrbElements planet,
struct OrbElements theSun,
struct fgTIME t, int idx)
{
- struct CelestialCoord
- result;
+ struct CelestialCoord result;
- struct SunPos
- SolarPosition;
+ fgSUNPOS SolarPosition;
- double
- eccAnom, r, v, ecl, actTime, R, s, ir, Nr, B, FV, ring_magn,
+ double eccAnom, r, v, ecl, actTime, R, s, ir, Nr, B, FV, ring_magn,
xv, yv, xh, yh, zh, xg, yg, zg, xe, ye, ze;
- actTime = fgCalcActTime(t);
- /* calculate the angle between ecliptic and equatorial coordinate system */
- ecl = fgDegToRad(23.4393 - 3.563E-7 * actTime);
-
+ actTime = fgCalcActTime(t);
+ /*calculate the angle between ecliptic and equatorial coordinate system */
+ ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime);
/* calculate the eccentric anomaly */
- eccAnom = fgCalcEccAnom(planet.M, planet.e);
+ eccAnom = fgCalcEccAnom(planet.M, planet.e);
/* calculate the planets distance (r) and true anomaly (v) */
xv = planet.a * (cos(eccAnom) - planet.e);
yv = planet.a * (sqrt(1.0 - planet.e*planet.e) * sin(eccAnom));
v = atan2(yv, xv);
r = sqrt ( xv*xv + yv*yv);
-
+
/* calculate the planets position in 3-dimensional space */
- xh = r * ( cos(planet.N) * cos(v+planet.w) - sin(planet.N) * sin(v+planet.w) * cos(planet.i));
- yh = r * ( sin(planet.N) * cos(v+planet.w) + cos(planet.N) * sin(v+planet.w) * cos(planet.i));
+ xh = r * (cos (planet.N) * cos (v + planet.w) -
+ sin (planet.N) * sin (v + planet.w) * cos (planet.i));
+ yh = r * (sin (planet.N) * cos (v + planet.w) +
+ cos (planet.N) * sin (v + planet.w) * cos (planet.i));
zh = r * ( sin(v+planet.w) * sin(planet.i));
- /* calculate the ecleptic longitude and latitude */
-
- /*
- lonecl = atan2(yh, xh);
- latecl = atan2(zh, sqrt ( xh*xh + yh*yh));
- */
- /* calculate the solar position */
+ /* calculate the ecliptic longitude and latitude */
- SolarPosition = fgCalcSunPos(theSun);
- xg = xh + SolarPosition.xs;
- yg = yh + SolarPosition.ys;
+ xg = xh + solarPosition.xs;
+ yg = yh + solarPosition.ys;
zg = zh;
xe = xg;
result.RightAscension = atan2(ye,xe);
result.Declination = atan2(ze, sqrt(xe*xe + ye*ye));
-
/* Let's calculate the brightness of the planet */
R = sqrt ( xg*xg + yg*yg + zg*zg);
ir = 0.4897394;
Nr = 2.9585076 + 6.6672E-7*actTime;
- B = asin ( sin (result.Declination) * cos(ir) - cos(result.Declination) * sin (ir) * sin (result.RightAscension - Nr));
- ring_magn = -2.6 * sin (abs(B)) + 1.2 * pow(sin(B),2);
+ B = asin (sin (result.Declination) * cos (ir) -
+ cos (result.Declination) * sin (ir) *
+ sin (result.RightAscension - Nr));
+ ring_magn = -2.6 * sin (fabs(B)) + 1.2 * pow(sin(B),2);
result.magnitude = -9.0 + 5*log10( r*R ) + 0.044 * FV + ring_magn;
break;
case 7: /* Uranus */
result.magnitude = -6.90 + 5*log10 (r*R) + 0.001 *FV;
break;
default:
- printf("index %d out of range !!!!\n", idx);
+ fgPrintf( FG_ASTRO, FG_ALERT, "index %d out of range !!!!\n", idx);
}
- printf(" Planet found at %f (ra), %f (dec)\n",
- result.RightAscension, result.Declination);
- printf(" Geocentric dist %f\n"
- " Heliocentric dist %f\n"
- " Distance to the sun %f\n"
- " Phase angle %f\n"
- " Brightness %f\n", R, r, s, FV, result.magnitude);
+ fgPrintf( FG_ASTRO, FG_DEBUG,
+ " Planet found at %f (ra), %f (dec)\n",
+ result.RightAscension, result.Declination);
+ fgPrintf( FG_ASTRO, FG_DEBUG,
+ " Geocentric dist %f\n"
+ " Heliocentric dist %f\n"
+ " Distance to the sun %f\n"
+ " Phase angle %f\n"
+ " Brightness %f\n", R, r, s, FV, result.magnitude);
return result;
}
+void fgPlanetsInit( void )
+{
+ struct fgLIGHT *l;
+ int i;
+ struct CelestialCoord pltPos;
+ double magnitude;
+
+ l = &cur_light_params;
+ /* if the display list was already built during a previous init,
+ then recycle it */
+
+ if (planets) {
+ xglDeleteLists(planets, 1);
+ }
+
+ planets = xglGenLists(1);
+ xglNewList( planets, GL_COMPILE );
+ xglBegin( GL_POINTS );
+
+
+ /* Add the planets to all four display lists */
+ for ( i = 2; i < 9; i++ ) {
+ fgSolarSystemUpdate(&(pltOrbElements[i]), cur_time_params);
+ pltPos = fgCalculatePlanet(pltOrbElements[i],
+ pltOrbElements[0], cur_time_params, i);
+
+ magnitude = (0.0 - pltPos.magnitude) / 5.0 + 1.0;
+
+ /* scale magnitudes again so they look ok */
+ /* magnitude =
+ magnitude * 0.7 + (((FG_STAR_LEVELS - 1) - i) * 0.1); */
+
+ /* the following statement could be made a little more sopisticated
+ for the moment: Stick to this one */
+ magnitude = magnitude * 0.7 + (3 * 0.1);
+ if ( magnitude > 1.0 ) { magnitude = 1.0; }
+ if ( magnitude < 0.0 ) { magnitude = 0.0; }
+
+ /* Add planets to the display list, based on sun_angle and current
+ magnitude It's pretty experimental... */
+
+ if ((double) (l->sun_angle - FG_PI_2) >
+ ((magnitude - 1.0) * -20 * DEG_TO_RAD))
+ {
+ xglColor3f (magnitude, magnitude, magnitude);
+ printf ("Sun Angle to Horizon (in Rads) = %f\n",
+ (double) (l->sun_angle - FG_PI_2));
+ printf ("Transformed Magnitude is :%f %f\n",
+ magnitude, (magnitude - 1.0) * -20 * DEG_TO_RAD);
+
+ xglVertex3f (50000.0 * cos (pltPos.RightAscension) *
+ cos (pltPos.Declination),
+ 50000.0 * sin (pltPos.RightAscension) *
+ cos (pltPos.Declination),
+ 50000.0 * sin (pltPos.Declination));
+ }
+ }
+ xglEnd();
+ xglEndList();
+
+}
+
+
+void fgPlanetsRender( void ) {
+ xglCallList(planets);
+}
+
/* $Log$
-/* Revision 1.2 1998/01/19 19:26:59 curt
-/* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
-/* This should simplify things tremendously.
+/* Revision 1.7 1998/02/23 19:07:55 curt
+/* Incorporated Durk's Astro/ tweaks. Includes unifying the sun position
+/* calculation code between sun display, and other FG sections that use this
+/* for things like lighting.
/*
+ * Revision 1.6 1998/02/12 21:59:36 curt
+ * Incorporated code changes contributed by Charlie Hotchkiss
+ * <chotchkiss@namg.us.anritsu.com>
+ *
+ * Revision 1.5 1998/02/03 23:20:12 curt
+ * Lots of little tweaks to fix various consistency problems discovered by
+ * Solaris' CC. Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
+ * passed arguments along to the real printf(). Also incorporated HUD changes
+ * by Michele America.
+ *
+ * Revision 1.4 1998/02/02 20:53:23 curt
+ * To version 0.29
+ *
+ * Revision 1.3 1998/01/27 00:47:47 curt
+ * Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
+ * system and commandline/config file processing code.
+ *
+ * Revision 1.2 1998/01/19 19:26:59 curt
+ * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
+ * This should simplify things tremendously.
+ *
* Revision 1.1 1998/01/07 03:16:18 curt
* Moved from .../Src/Scenery/ to .../Src/Astro/
*
projects / simgear.git / blobdiff