#include <math.h>
#include <GL/glut.h>
-#include "../XGL/xgl.h"
+#include <XGL/xgl.h>
-#include "orbits.h"
-#include "moon.h"
+#include <Astro/orbits.h>
+#include <Astro/moon.h>
-#include "../Aircraft/aircraft.h"
-#include "../Include/constants.h"
-#include "../Include/general.h"
-#include "../Main/views.h"
-#include "../Time/fg_time.h"
+#include <Aircraft/aircraft.h>
+#include <Include/fg_constants.h>
+#include <Include/general.h>
+#include <Main/views.h>
+#include <Time/fg_time.h>
+#include <Main/fg_debug.h>
struct CelestialCoord moonPos;
static float xMoon, yMoon, zMoon;
-static GLint moon;
+static GLint moon = 0;
-/*
-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,
Ls, Lm, D, F, mpar, gclat, rho, HA, g;
- struct fgAIRCRAFT *a;
- struct fgFLIGHT *f;
+ fgAIRCRAFT *a;
+ fgFLIGHT *f;
a = ¤t_aircraft;
- f = &a->flight;
+ 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) - (DEG_TO_RAD * 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);
r = sqrt(xv*xv + yv*yv);
/* estimate the geocentric rectangular coordinates here */
- xh = r * (cos(params.N) * cos(v + params.w) - sin(params.N) * sin(v + params.w) * cos(params.i));
- yh = r * (sin(params.N) * cos(v + params.w) + cos(params.N) * sin(v + params.w) * cos(params.i));
+ xh = r * (cos (params.N) * cos (v + params.w) -
+ sin (params.N) * sin (v + params.w) * cos (params.i));
+ yh = r * (sin (params.N) * cos (v + params.w) +
+ cos (params.N) * sin (v + params.w) * cos (params.i));
zh = r * (sin(v + params.w) * sin(params.i));
/* calculate the ecliptic latitude and longitude here */
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 of these 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);
- topocCoord.RightAscension = geocCoord.RightAscension - mpar * rho * cos(gclat) * sin(HA) / cos(geocCoord.Declination);
- topocCoord.Declination = geocCoord.Declination - mpar * rho * sin(gclat) * sin(g - geocCoord.Declination) / sin(g);
+ topocCoord.RightAscension = geocCoord.RightAscension -
+ mpar * rho * cos (gclat) * sin (HA) / cos (geocCoord.Declination);
+ topocCoord.Declination = geocCoord.Declination -
+ mpar * rho * sin (gclat) * sin (g - geocCoord.Declination) / sin (g);
return topocCoord;
}
void fgMoonInit( void ) {
- struct fgLIGHT *l;
- static int dl_exists = 0;
-
- printf("Initializing the Moon\n");
+ GLfloat moonColor[4] = {0.85, 0.75, 0.35, 1.0};
+ GLfloat black[4] = { 0.0, 0.0, 0.0, 1.0 };
- l = &cur_light_params;
-
- /* position the moon */
+ fgPrintf( FG_ASTRO, FG_INFO, "Initializing the Moon\n");
fgSolarSystemUpdate(&(pltOrbElements[1]), cur_time_params);
moonPos = fgCalculateMoon(pltOrbElements[1], pltOrbElements[0],
cur_time_params);
-#ifdef DEBUG
- printf("Moon found at %f (ra), %f (dec)\n", moonPos.RightAscension,
- moonPos.Declination);
-#endif
+ fgPrintf( FG_ASTRO, FG_DEBUG,
+ "Moon found at %f (ra), %f (dec)\n", moonPos.RightAscension,
+ moonPos.Declination);
xMoon = 60000.0 * cos(moonPos.RightAscension) * cos(moonPos.Declination);
yMoon = 60000.0 * sin(moonPos.RightAscension) * cos(moonPos.Declination);
zMoon = 60000.0 * sin(moonPos.Declination);
- if ( !dl_exists ) {
- dl_exists = 1;
-
- /* printf("First time through, creating moon display list\n"); */
-
- moon = xglGenLists(1);
- xglNewList(moon, GL_COMPILE );
-
- /* xglMaterialfv(GL_FRONT, GL_AMBIENT, l->scene_clear);
- xglMaterialfv(GL_FRONT, GL_DIFFUSE, moon_color); */
-
-
- glutSolidSphere(1.0, 10, 10);
-
- xglEndList();
+ if (moon) {
+ xglDeleteLists (moon, 1);
}
+
+ moon = xglGenLists (1);
+ xglNewList (moon, GL_COMPILE);
+
+ xglMaterialfv (GL_FRONT, GL_AMBIENT, black);
+ xglMaterialfv (GL_FRONT, GL_DIFFUSE, moonColor);
+ xglPushMatrix ();
+ xglTranslatef (xMoon, yMoon, zMoon);
+ xglScalef (1400, 1400, 1400);
+
+ glutSolidSphere (1.0, 10, 10);
+ xglPopMatrix ();
+ xglEndList ();
}
/* Draw the moon */
void fgMoonRender( void ) {
- struct fgLIGHT *l;
- GLfloat white[4] = { 1.0, 1.0, 1.0, 1.0 };
-
- /* printf("Rendering moon\n"); */
-
- l = &cur_light_params;
-
- xglMaterialfv(GL_FRONT, GL_AMBIENT, l->sky_color );
- xglMaterialfv(GL_FRONT, GL_DIFFUSE, white);
-
- xglPushMatrix();
- xglTranslatef(xMoon, yMoon, zMoon);
- xglScalef(1400, 1400, 1400);
-
xglCallList(moon);
-
- xglPopMatrix();
}
/* $Log$
-/* Revision 1.2 1998/01/19 18:40:16 curt
-/* Tons of little changes to clean up the code and to remove fatal errors
-/* when building with the c++ compiler.
+/* Revision 1.7 1998/02/23 19:07:54 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 1998/02/07 15:29:32 curt
+ * Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
+ * <chotchkiss@namg.us.anritsu.com>
+ *
+ * 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.
+ *
+ * Revision 1.2 1998/01/19 18:40:16 curt
+ * Tons of little changes to clean up the code and to remove fatal errors
+ * when building with the c++ compiler.
+ *
* Revision 1.1 1998/01/07 03:16:16 curt
* Moved from .../Src/Scenery/ to .../Src/Astro/
*
projects / simgear.git / blobdiff