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To version 0.29

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This commit is contained in:
curt
2009-09-15 18:31:28 +02:00
committed by Tim Moore
parent 0e53f221cf
commit cb1bcb398a
8 changed files with 272 additions and 283 deletions
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Astro/moon.c
+54 -147
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@@ -40,113 +40,12 @@ struct CelestialCoord moonPos;
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)
@@ -154,7 +53,6 @@ struct CelestialCoord fgCalculateMoon(struct OrbElements params,
struct CelestialCoord
geocCoord, topocCoord;
double
eccAnom, ecl, lonecl, latecl, actTime,
xv, yv, v, r, xh, yh, zh, xg, yg, zg, xe, ye, ze,
@@ -166,14 +64,16 @@ struct CelestialCoord fgCalculateMoon(struct OrbElements params,
a = &current_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);
@@ -188,39 +88,41 @@ struct CelestialCoord fgCalculateMoon(struct OrbElements params,
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);
@@ -238,10 +140,11 @@ struct CelestialCoord fgCalculateMoon(struct OrbElements params,
/* 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);
@@ -259,22 +162,23 @@ struct CelestialCoord fgCalculateMoon(struct OrbElements params,
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);
@@ -290,7 +194,8 @@ void fgMoonInit( void ) {
/* 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);
@@ -301,15 +206,14 @@ void fgMoonInit( void ) {
/* 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);
@@ -322,10 +226,13 @@ void fgMoonRender( void ) {
/* $Log$
/* 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.