static float xMoon, yMoon, zMoon;
static GLint moon;
-/*
-static GLfloat vdata[12][3] =
-{
- {-X, 0.0, Z }, { X, 0.0, Z }, {-X, 0.0, -Z}, {X, 0.0, -Z },
- { 0.0, Z, X }, { 0.0, Z, -X}, {0.0, -Z, -X}, {0.0, -Z, -X},
- { Z, X, 0.0 }, { -Z, X, 0.0}, {Z, -X, 0.0 }, {-Z, -X, 0.0}
-};
-
-static GLuint tindices[20][3] =
-{
- {0,4,1}, {0,9,4}, {9,5,4}, {4,5,8}, {4,8,1},
- {8,10,1}, {8,3,10}, {5,3,8}, {5,2,3}, {2,7,3},
- {7,10,3}, {7,6,10}, {7,11,6}, {11,0,6}, {0,1,6},
- {6,1,10}, {9,0,11}, {9,11,2}, {9,2,5}, {7,2,11}
-};*/
-
-/* -------------------------------------------------------------
- This section contains the code that generates a yellow
- Icosahedron. It's under development... (of Course)
-______________________________________________________________*/
-/*
-void NormalizeVector(float v[3])
-{
- GLfloat d = sqrt(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]);
- if (d == 0.0)
- {
- printf("zero length vector\n");
- return;
- }
- v[0] /= d;
- v[1] /= d;
- v[2] /= d;
-}
-void drawTriangle(float *v1, float *v2, float *v3)
-{
- xglBegin(GL_POLYGON);
- //xglBegin(GL_POINTS);
- xglNormal3fv(v1);
- xglVertex3fv(v1);
- xglNormal3fv(v2);
- xglVertex3fv(v2);
- xglNormal3fv(v3);
- xglVertex3fv(v3);
- xglEnd();
-}
-
-void subdivide(float *v1, float *v2, float *v3, long depth)
-{
- GLfloat v12[3], v23[3], v31[3];
- GLint i;
-
- if (!depth)
- {
- drawTriangle(v1, v2, v3);
- return;
- }
- for (i = 0; i < 3; i++)
- {
- v12[i] = (v1[i] + v2[i]);
- v23[i] = (v2[i] + v3[i]);
- v31[i] = (v3[i] + v1[i]);
- }
- NormalizeVector(v12);
- NormalizeVector(v23);
- NormalizeVector(v31);
- subdivide(v1, v12, v31, depth - 1);
- subdivide(v2, v23, v12, depth - 1);
- subdivide(v3, v31, v23, depth - 1);
- subdivide(v12, v23, v31,depth - 1);
-
-} */
-/*
-void display(void)
-{
- int i;
- xglClear(GL_COLOR_BUFFER_BIT);
- xglPushMatrix();
- xglRotatef(spin, 0.0, 0.0, 0.0);
- xglColor3f(1.0, 1.0, 0.0);
-// xglBegin(GL_LINE_LOOP);
- for (i = 0; i < 20; i++)
- {
-
- //xglVertex3fv(&vdata[tindices[i][0]][0]);
- //xglVertex3fv(&vdata[tindices[i][1]][0]);
- //xglVertex3fv(&vdata[tindices[i][2]][0]);
-
- subdivide(&vdata[tindices[i][0]][0],
- &vdata[tindices[i][1]][0],
- &vdata[tindices[i][2]][0], 3);
-
-
- }
-// xglEnd();
- // xglFlush();
- xglPopMatrix();
- glutSwapBuffers();
-} */
/* --------------------------------------------------------------
-
This section contains the code that calculates the actual
position of the moon in the night sky.
-
----------------------------------------------------------------*/
-
struct CelestialCoord fgCalculateMoon(struct OrbElements params,
struct OrbElements sunParams,
struct fgTIME t)
struct CelestialCoord
geocCoord, topocCoord;
-
double
eccAnom, ecl, lonecl, latecl, actTime,
xv, yv, v, r, xh, yh, zh, xg, yg, zg, xe, ye, ze,
a = ¤t_aircraft;
f = &a->flight;
-/* calculate the angle between ecliptic and equatorial coordinate system */
+ /* calculate the angle between ecliptic and equatorial coordinate
+ * system, in Radians */
actTime = fgCalcActTime(t);
- ecl = fgDegToRad(23.4393 - 3.563E-7 * actTime); // in radians of course
+ /* ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime);*/
+ ecl = 0.409093 - 6.2186E-9 * actTime;
/* calculate the eccentric anomaly */
eccAnom = fgCalcEccAnom(params.M, params.e);
- /* calculate the moon's distance (d) and true anomaly (v) */
+ /* calculate the moon's distance (r) and true anomaly (v) */
xv = params.a * ( cos(eccAnom) - params.e);
yv = params.a * ( sqrt(1.0 - params.e*params.e) * sin(eccAnom));
v =atan2(yv, xv);
lonecl = atan2( yh, xh);
latecl = atan2( zh, sqrt( xh*xh + yh*yh));
- /* calculate a number of perturbations */
+ /* calculate a number of perturbations, i.e. disturbances caused by
+ * the gravitational influence of the sun and the other mayor
+ * planets, the largest even have their own names */
Ls = sunParams.M + sunParams.w;
Lm = params.M + params.w + params.N;
D = Lm - Ls;
F = Lm - params.N;
- lonecl += fgDegToRad(
- - 1.274 * sin (params.M - 2*D) // the Evection
- + 0.658 * sin (2 * D) // the Variation
- - 0.186 * sin (sunParams.M) // the yearly variation
- - 0.059 * sin (2*params.M - 2*D)
- - 0.057 * sin (params.M - 2*D + sunParams.M)
- + 0.053 * sin (params.M + 2*D)
- + 0.046 * sin (2*D - sunParams.M)
- + 0.041 * sin (params.M - sunParams.M)
- - 0.035 * sin (D) // the Parallactic Equation
- - 0.031 * sin (params.M + sunParams.M)
- - 0.015 * sin (2*F - 2*D)
- + 0.011 * sin (params.M - 4*D)
- ); /* Pheeuuwwww */
- latecl += fgDegToRad(
- - 0.173 * sin (F - 2*D)
- - 0.055 * sin (params.M - F - 2*D)
- - 0.046 * sin (params.M + F - 2*D)
- + 0.033 * sin (F + 2*D)
- + 0.017 * sin (2 * params.M + F)
- ); /* Yep */
-
+ lonecl += DEG_TO_RAD * (
+ - 1.274 * sin (params.M - 2*D) /* the Evection */
+ + 0.658 * sin (2 * D) /* the Variation */
+ - 0.186 * sin (sunParams.M) /* the yearly variation */
+ - 0.059 * sin (2*params.M - 2*D)
+ - 0.057 * sin (params.M - 2*D + sunParams.M)
+ + 0.053 * sin (params.M + 2*D)
+ + 0.046 * sin (2*D - sunParams.M)
+ + 0.041 * sin (params.M - sunParams.M)
+ - 0.035 * sin (D) /* the Parallactic Equation */
+ - 0.031 * sin (params.M + sunParams.M)
+ - 0.015 * sin (2*F - 2*D)
+ + 0.011 * sin (params.M - 4*D)
+ );
+ latecl += DEG_TO_RAD * (
+ - 0.173 * sin (F - 2*D)
+ - 0.055 * sin (params.M - F - 2*D)
+ - 0.046 * sin (params.M + F - 2*D)
+ + 0.033 * sin (F + 2*D)
+ + 0.017 * sin (2 * params.M + F)
+ );
+
r += (
- 0.58 * cos(params.M - 2*D)
- 0.46 * cos(2*D)
- ); /* Ok! */
-
+ );
+
xg = r * cos(lonecl) * cos(latecl);
yg = r * sin(lonecl) * cos(latecl);
zg = r * sin(latecl);
/* New since 25 december 1997 */
/* Calculate the moon's topocentric position instead of it's geocentric! */
- mpar = asin( 1 / r); /* calculate the moon's parrallax, i.e. the apparent size of the
- (equatorial) radius of the Earth, as seen from the moon */
- gclat = FG_Latitude - 0.083358 * sin (2 * fgDegToRad( FG_Latitude));
- rho = 0.99883 + 0.00167 * cos(2 * fgDegToRad(FG_Latitude));
+ /* calculate the moon's parrallax, i.e. the apparent size of the
+ * (equatorial) radius of the Earth, as seen from the moon */
+ mpar = asin( 1 / r);
+ gclat = FG_Latitude - 0.083358 * sin (2 * DEG_TO_RAD * FG_Latitude);
+ rho = 0.99883 + 0.00167 * cos(2 * DEG_TO_RAD * FG_Latitude);
if (geocCoord.RightAscension < 0)
geocCoord.RightAscension += (2*FG_PI);
void fgMoonInit( void ) {
- struct fgLIGHT *l;
+ /* struct fgLIGHT *l; */
static int dl_exists = 0;
+ /* GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 }; */
+ GLfloat moonColor[4] = {0.85, 0.65, 0.05, 1.0};
+ GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
fgPrintf( FG_ASTRO, FG_INFO, "Initializing the Moon\n");
- l = &cur_light_params;
+ /* l = &cur_light_params; */
/* position the moon */
fgSolarSystemUpdate(&(pltOrbElements[1]), cur_time_params);
moonPos = fgCalculateMoon(pltOrbElements[1], pltOrbElements[0],
cur_time_params);
-#ifdef DEBUG
fgPrintf( FG_ASTRO, FG_DEBUG,
"Moon found at %f (ra), %f (dec)\n", moonPos.RightAscension,
moonPos.Declination);
-#endif
xMoon = 60000.0 * cos(moonPos.RightAscension) * cos(moonPos.Declination);
yMoon = 60000.0 * sin(moonPos.RightAscension) * cos(moonPos.Declination);
/* xglMaterialfv(GL_FRONT, GL_AMBIENT, l->scene_clear);
xglMaterialfv(GL_FRONT, GL_DIFFUSE, moon_color); */
-
+ xglMaterialfv(GL_FRONT, GL_AMBIENT, black);
+ xglMaterialfv(GL_FRONT, GL_DIFFUSE, moonColor);
glutSolidSphere(1.0, 10, 10);
/* Draw the moon */
void fgMoonRender( void ) {
- struct fgLIGHT *l;
- GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
+ /* struct fgLIGHT *l; */
/* printf("Rendering moon\n"); */
- l = &cur_light_params;
+ /* l = &cur_light_params; */
- xglMaterialfv(GL_FRONT, GL_AMBIENT, l->sky_color );
- xglMaterialfv(GL_FRONT, GL_DIFFUSE, white);
+ /* xglMaterialfv(GL_FRONT, GL_AMBIENT, l->sky_color ); */
+ /* xglMaterialfv(GL_FRONT, GL_DIFFUSE, white); */
xglPushMatrix();
xglTranslatef(xMoon, yMoon, zMoon);
/* $Log$
-/* Revision 1.4 1998/01/27 00:47:46 curt
-/* Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
-/* system and commandline/config file processing code.
+/* Revision 1.5 1998/02/02 20:53:21 curt
+/* To version 0.29
/*
+ * Revision 1.4 1998/01/27 00:47:46 curt
+ * Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
+ * system and commandline/config file processing code.
+ *
* Revision 1.3 1998/01/19 19:26:57 curt
* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
* This should simplify things tremendously.
#include <Time/fg_time.h>
#include <math.h>
-#define X .525731112119133606
-#define Z .850650808352039932
+/* #define X .525731112119133606 */
+/* #define Z .850650808352039932 */
/* Initialize the Moon Display management Subsystem */
void fgMoonInit( void );
-/* Draw the Stars */
+/* Draw the Moon */
void fgMoonRender( void );
struct CelestialCoord fgCalculateMoon(struct OrbElements Params,
/* $Log$
-/* Revision 1.4 1998/01/22 02:59:27 curt
-/* Changed #ifdef FILE_H to #ifdef _FILE_H
+/* Revision 1.5 1998/02/02 20:53:21 curt
+/* To version 0.29
/*
+ * Revision 1.4 1998/01/22 02:59:27 curt
+ * Changed #ifdef FILE_H to #ifdef _FILE_H
+ *
* Revision 1.3 1998/01/19 19:26:58 curt
* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
* This should simplify things tremendously.
#include <Astro/orbits.h>
+#include <Include/fg_constants.h>
#include <Include/general.h>
#include <Time/fg_time.h>
#include <Main/fg_debug.h>
struct OrbElements pltOrbElements[9];
+//double fgCalcActTime(struct fgTIME t)
+//{
+// double
+// actTime, UT;
+// int year;
+//
+// /* a hack. This one introduces the 2000 problem into the program */
+// year = t.gmt->tm_year + 1900;
+//
+// /* calculate the actual time, remember to add 1 to tm_mon! */
+// actTime = 367 * year - 7 *
+// (year + ((t.gmt->tm_mon+1) + 9) / 12) / 4 + 275 *
+// (t.gmt->tm_mon+1) / 9 + t.gmt->tm_mday - 730530;
+//
+// UT = t.gmt->tm_hour + ((double) t.gmt->tm_min / 60);
+// /*printf("UT = %f\n", UT); */
+// actTime += (UT / 24.0);
+// #define DEBUG 1
+// #ifdef DEBUG
+// /* printf(" Actual Time:\n"); */
+// /* printf(" current day = %f\t", actTime); */
+// /* printf(" GMT = %d, %d, %d, %d, %d, %d\n",
+// year, t.gmt->tm_mon, t.gmt->tm_mday,
+// t.gmt->tm_hour, t.gmt->tm_min, t.gmt->tm_sec); */
+// #endif
+// return actTime;
+//}
+
+
double fgCalcActTime(struct fgTIME t)
{
- double
- actTime, UT;
- int year;
-
- /* a hack. This one introduces the 2000 problem into the program */
- year = t.gmt->tm_year + 1900;
-
- /* calculate the actual time, rember to add 1 to tm_mon! */
- actTime = 367 * year - 7 *
- (year + ((t.gmt->tm_mon+1) + 9) / 12) / 4 + 275 *
- (t.gmt->tm_mon+1) / 9 + t.gmt->tm_mday - 730530;
-
- UT = t.gmt->tm_hour + ((double) t.gmt->tm_min / 60);
- /*printf("UT = %f\n", UT); */
- actTime += (UT / 24.0);
- #define DEBUG 1
- #ifdef DEBUG
- /* printf(" Actual Time:\n"); */
- /* printf(" current day = %f\t", actTime); */
- /* printf(" GMT = %d, %d, %d, %d, %d, %d\n",
- year, t.gmt->tm_mon, t.gmt->tm_mday,
- t.gmt->tm_hour, t.gmt->tm_min, t.gmt->tm_sec); */
- #endif
- return actTime;
+ return (t.mjd - 36523.5);
}
+
/* convert degrees to radians */
+/*
double fgDegToRad(double angle)
{
return (angle * PIOVER180);
}
-
+*/
double fgCalcEccAnom(double M, double e)
{
double
diff = fabs(E0 - E1);
E0 = E1;
}
- while (diff > fgDegToRad(0.001));
+ while (diff > (DEG_TO_RAD * 0.001));
return E0;
}
return eccAnom;
if ( (data = fopen(path, "r")) == NULL )
{
- fgPrintf( FG_ASTRO, FG_ALERT, "Cannot open data file: '%s'\n", path);
+ fgPrintf( FG_ASTRO, FG_ALERT,
+ "Cannot open data file: '%s'\n", path);
return;
}
- #ifdef DEBUG
fgPrintf( FG_ASTRO, FG_INFO, " reading datafile %s\n", path);
- #endif
/* for all the objects... */
for (i = 0; i < 9; i ++)
actTime = fgCalcActTime(t);
/* calculate the actual orbital elements */
- planet->M = fgDegToRad(planet->MFirst + (planet->MSec * actTime)); // angle in radians
- planet->w = fgDegToRad(planet->wFirst + (planet->wSec * actTime)); // angle in radians
- planet->N = fgDegToRad(planet->NFirst + (planet->NSec * actTime)); // angle in radians
- planet->i = fgDegToRad(planet->iFirst + (planet->iSec * actTime)); // angle in radians
+ planet->M = DEG_TO_RAD * (planet->MFirst + (planet->MSec * actTime)); // angle in radians
+ planet->w = DEG_TO_RAD * (planet->wFirst + (planet->wSec * actTime)); // angle in radians
+ planet->N = DEG_TO_RAD * (planet->NFirst + (planet->NSec * actTime)); // angle in radians
+ planet->i = DEG_TO_RAD * (planet->iFirst + (planet->iSec * actTime)); // angle in radians
planet->e = planet->eFirst + (planet->eSec * actTime);
planet->a = planet->aFirst + (planet->aSec * actTime);
}
/* $Log$
-/* Revision 1.4 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 1.5 1998/02/02 20:53:22 curt
+/* To version 0.29
/*
+ * Revision 1.4 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 1.3 1998/01/22 02:59:27 curt
* Changed #ifdef FILE_H to #ifdef _FILE_H
*
};
-double fgDegToRad(double angle);
+/* double fgDegToRad(double angle); */
double fgCalcEccAnom(double M, double e);
double fgCalcActTime(struct fgTIME t);
/* $Log$
-/* Revision 1.3 1998/01/22 02:59:27 curt
-/* Changed #ifdef FILE_H to #ifdef _FILE_H
+/* Revision 1.4 1998/02/02 20:53:22 curt
+/* To version 0.29
/*
+ * Revision 1.3 1998/01/22 02:59:27 curt
+ * Changed #ifdef FILE_H to #ifdef _FILE_H
+ *
* Revision 1.2 1998/01/19 19:26:58 curt
* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
* This should simplify things tremendously.
**************************************************************************/
+#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)
actTime = fgCalcActTime(t);
/* calculate the angle between ecliptic and equatorial coordinate system */
- ecl = fgDegToRad(23.4393 - 3.563E-7 * actTime);
-
+ /* ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime); */
+ ecl = 0.409093 - 6.2186E-9 * actTime;
/* calculate the eccentric anomaly */
eccAnom = fgCalcEccAnom(planet.M, planet.e);
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 */
+ /* calculate the ecliptic longitude and latitude */
/*
lonecl = atan2(yh, xh);
}
+void fgPlanetsInit( void )
+{
+ int i;
+ struct CelestialCoord pltPos;
+ double magnitude;
+
+ /* if the display list was already built during a previous init,
+ 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);
+
+ /* give the planets a temporary color, for testing purposes */
+ /* xglColor3f( 1.0, 0.0, 0.0); */
+ /* scale magnitudes to (0.0 - 1.0) */
+
+ 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; }
+
+
+ xglColor3f(magnitude, magnitude, magnitude);
+ /* xglColor3f(1.0, 1.0,1.0); */
+
+ 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 1.3 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 1.4 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.
struct OrbElements theSun,
struct fgTIME t, int idx);
+
+void fgPlanetsInit();
+void fgPlanetsRender();
+
+
#endif /* PLANETS_H */
/* $Log$
-/* Revision 1.2 1998/01/22 02:59:28 curt
-/* Changed #ifdef FILE_H to #ifdef _FILE_H
+/* Revision 1.3 1998/02/02 20:53:23 curt
+/* To version 0.29
/*
+ * Revision 1.2 1998/01/22 02:59:28 curt
+ * Changed #ifdef FILE_H to #ifdef _FILE_H
+ *
* Revision 1.1 1998/01/07 03:16:18 curt
* Moved from .../Src/Scenery/ to .../Src/Astro/
*
void fgStarsInit( void ) {
FILE *fd;
struct fgGENERAL *g;
- struct CelestialCoord pltPos;
+ /* struct CelestialCoord pltPos; */
char path[1024];
char line[256], name[256];
char *front, *end;
double right_ascension, declination, magnitude;
/* double ra_save, decl_save; */
/* double ra_save1, decl_save1; */
- int count, i, j, max_stars;
+ int count, i, max_stars;
fgPrintf( FG_ASTRO, FG_INFO, "Initializing stars\n");
max_stars = FG_MAX_STARS;
for ( i = 0; i < FG_STAR_LEVELS; i++ ) {
- fgPrintf( FG_ASTRO, FG_INFO, " Loading %d Stars: %s\n", max_stars, path);
+ fgPrintf( FG_ASTRO, FG_INFO,
+ " Loading %d Stars: %s\n", max_stars, path);
if ( (fd = fopen(path, "r")) == NULL ) {
- fgPrintf( FG_ASTRO, FG_ALERT, "Cannot open star file: '%s'\n", path);
+ fgPrintf( FG_ASTRO, FG_ALERT,
+ "Cannot open star file: '%s'\n", path);
return;
}
fclose(fd);
- /* Add the planets to all four display lists */
- for ( j = 2; j < 9; j++ ) {
- pltPos = fgCalculatePlanet(pltOrbElements[j],
- pltOrbElements[0], cur_time_params, j);
- /* give the planets a temporary color, for testing purposes */
- /* xglColor3f( 1.0, 0.0, 0.0); */
-
- /* scale magnitudes to (0.0 - 1.0) */
- magnitude = (0.0 - pltPos.magnitude) / 5.0 + 1.0;
-
- /* scale magnitudes again so they look ok */
- if ( magnitude > 1.0 ) { magnitude = 1.0; }
- if ( magnitude < 0.0 ) { magnitude = 0.0; }
- magnitude =
- magnitude * 0.7 + (((FG_STAR_LEVELS - 1) - i) * 0.1);
-
-
- xglColor3f(magnitude, magnitude, magnitude);
-
- xglVertex3f( 50000.0 * cos(pltPos.RightAscension) *
- cos(pltPos.Declination),
- 50000.0 * sin(pltPos.RightAscension) *
- cos(pltPos.Declination),
- 50000.0 * sin(pltPos.Declination) );
- }
xglEnd();
/*
/* $Log$
-/* Revision 1.5 1998/01/27 18:35:53 curt
-/* Minor tweaks.
+/* Revision 1.6 1998/02/02 20:53:23 curt
+/* To version 0.29
/*
+ * Revision 1.5 1998/01/27 18:35:53 curt
+ * Minor tweaks.
+ *
* Revision 1.4 1998/01/27 00:47:49 curt
* Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
* system and commandline/config file processing code.
#include <Astro/orbits.h>
#include <Astro/sun.h>
#include <Main/fg_debug.h>
+#include <Include/fg_constants.h>
-GLint sun_obj;
+GLint sun_obj = 0;
static struct CelestialCoord sunPos;
/* calculate the angle between ecliptic and equatorial coordinate system */
actTime = fgCalcActTime(t);
- ecl = fgDegToRad(23.4393 - 3.563E-7 * actTime); // Angle now in Rads
+ ecl = DEG_TO_RAD * (23.4393 - 3.563E-7 * actTime); // Angle now in Rads
/* calculate the sun's ecliptic position */
SolarPosition = fgCalcSunPos(params);
/* Initialize the Sun */
void fgSunInit( void ) {
- static int dl_exists = 0;
+ struct fgLIGHT *l;
+ struct fgTIME *t;
+ struct fgVIEW *v;
+
+ /* GLfloat color[4] = { 1.00, 1.00, 1.00, 1.00 }; */
+ double x_2, x_4, x_8, x_10;
+ GLfloat ambient;
+ GLfloat amb[4];
+
+ l = &cur_light_params;
+ t = &cur_time_params;
+ v = ¤t_view;
fgPrintf( FG_ASTRO, FG_INFO, " Initializing the Sun\n");
fgSolarSystemUpdate(&(pltOrbElements[0]), cur_time_params);
sunPos = fgCalculateSun(pltOrbElements[0], cur_time_params);
-#ifdef DEBUG
fgPrintf( FG_ASTRO, FG_INFO,
"Sun found at %f (ra), %f (dec)\n",
sunPos.RightAscension, sunPos.Declination);
-#endif
xSun = 60000.0 * cos(sunPos.RightAscension) * cos(sunPos.Declination);
ySun = 60000.0 * sin(sunPos.RightAscension) * cos(sunPos.Declination);
zSun = 60000.0 * sin(sunPos.Declination);
- if ( !dl_exists ) {
- dl_exists = 1;
-
- /* printf("First time through, creating sun display list\n"); */
-
- sun_obj = xglGenLists(1);
- xglNewList(sun_obj, GL_COMPILE );
-
- glutSolidSphere(1.0, 10, 10);
- xglEndList();
+ if (sun_obj) {
+ xglDeleteLists(sun_obj, 1);
}
-}
+ /* printf("First time through, creating sun display list\n"); */
-/* Draw the Sun */
-void fgSunRender( void ) {
- struct fgVIEW *v;
- struct fgTIME *t;
- struct fgLIGHT *l;
- /* GLfloat color[4] = { 0.85, 0.65, 0.05, 1.0 }; */
- GLfloat color[4] = { 1.00, 1.00, 1.00, 1.00 };
- double x_2, x_4, x_8, x_10;
- GLfloat ambient;
- GLfloat amb[3], diff[3];
+ sun_obj = xglGenLists(1);
+ xglNewList(sun_obj, GL_COMPILE );
t = &cur_time_params;
if ( ambient < 0.3 ) ambient = 0.3;
if ( ambient > 1.0 ) ambient = 1.0;
- amb[0] = 0.50 + ((ambient * 6.66) - 1.6);
- amb[1] = 0.00 + ((ambient * 6.66) - 1.6);
- amb[2] = 0.00 + ((ambient * 6.66) - 1.6);
- amb[3] = 0.00;
-#ifdef DEBUG
- fgPrintf( FG_ASTRO, FG_INFO,
- "Color of the sun: %f, %f, %f\n"
- "Ambient value : %f\n"
- "Sun Angle : %f\n" , amb[0], amb[1], amb[2], ambient, t->sun_angle);
-#endif
- diff[0] = 0.0;
- diff[1] = 0.0;
- diff[2] = 0.0;
- diff[3] = 1.0;
-
+ amb[0] = 0.00 + ((ambient * 6.0) - 1.0); /* minimum val = 0.8 */
+ amb[1] = 0.00 + ((ambient * 11.0) - 3.0); /* minimum val = 0.3 */
+ amb[2] = 0.00 + ((ambient * 12.0) - 3.6); /* minimum val = 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;
+
+ fgPrintf( FG_ASTRO, FG_DEBUG,
+ "Color of the sun: %f, %f, %f\n"
+ "Ambient value : %f\n"
+ "Sun Angle : %f\n" ,
+ amb[0], amb[1], amb[2], ambient, l->sun_angle);
+
/* set lighting parameters */
- xglLightfv(GL_LIGHT0, GL_AMBIENT, color );
- xglLightfv(GL_LIGHT0, GL_DIFFUSE, color );
- xglMaterialfv(GL_FRONT, GL_AMBIENT, amb);
- xglMaterialfv(GL_FRONT, GL_DIFFUSE, diff);
- xglMaterialfv(GL_FRONT, GL_SHININESS, diff);
- xglMaterialfv(GL_FRONT, GL_EMISSION, diff);
- xglMaterialfv(GL_FRONT, GL_SPECULAR, diff);
+ /*xglLightfv(GL_LIGHT0, GL_AMBIENT, color );
+ xglLightfv(GL_LIGHT0, GL_DIFFUSE, color );
+ xglMaterialfv(GL_FRONT, GL_AMBIENT, amb);
+ xglMaterialfv(GL_FRONT, GL_DIFFUSE, diff);
+ xglMaterialfv(GL_FRONT, GL_SHININESS, diff);
+ xglMaterialfv(GL_FRONT, GL_EMISSION, diff);
+ xglMaterialfv(GL_FRONT, GL_SPECULAR, diff); */
/* xglDisable( GL_LIGHTING ); */
xglTranslatef(xSun, ySun, zSun);
xglScalef(1400, 1400, 1400);
- xglColor3f(0.85, 0.65, 0.05);
-
- xglCallList(sun_obj);
+ /*xglColor3f(0.85, 0.65, 0.05);*/
+ xglColor3f(amb[0], amb[1], amb[2]);
+ glutSolidSphere(1.0, 10, 10);
xglPopMatrix();
/* xglEnable( GL_LIGHTING ); */
+
+ xglEndList();
+}
+
+
+/* Draw the Sun */
+void fgSunRender( void ) {
+ xglCallList(sun_obj);
}
/* $Log$
-/* Revision 1.4 1998/01/27 00:47:50 curt
-/* Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
-/* system and commandline/config file processing code.
+/* Revision 1.5 1998/02/02 20:53:24 curt
+/* To version 0.29
/*
+ * Revision 1.4 1998/01/27 00:47:50 curt
+ * Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
+ * system and commandline/config file processing code.
+ *
* Revision 1.3 1998/01/19 19:27:00 curt
* Merged in make system changes from Bob Kuehne <rpk@sgi.com>
* This should simplify things tremendously.
projects / simgear.git / commitdiff