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First stab at sky dome actually starting to look reasonable. :-)

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This commit is contained in:
curt
1997-12-18 23:32:28 +00:00
parent ad2947e407
commit d289222b39
2 changed files with 71 additions and 70 deletions
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11
Scenery/astro.c
View File

@@ -91,7 +91,7 @@ void fgAstroRender() {
xglDisable( GL_FOG );
/* set the sun position */
xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec_inv );
/* xglLightfv( GL_LIGHT0, GL_POSITION, l->sun_vec_inv ); */
xglPushMatrix();
@@ -122,10 +122,13 @@ void fgAstroRender() {
/* $Log$
/* Revision 1.8 1997/12/15 23:54:57 curt
/* Add xgl wrappers for debugging.
/* Generate terrain normals on the fly.
/* Revision 1.9 1997/12/18 23:32:35 curt
/* First stab at sky dome actually starting to look reasonable. :-)
/*
* Revision 1.8 1997/12/15 23:54:57 curt
* Add xgl wrappers for debugging.
* Generate terrain normals on the fly.
*
* Revision 1.7 1997/12/15 20:59:09 curt
* Misc. tweaks.
*

130
Scenery/sky.c
View File

@@ -46,20 +46,20 @@
#include "../Flight/flight.h"
#include "../Include/constants.h"
#include "../Main/views.h"
#include "../Math/fg_random.h"
/*
#include "../Include/general.h"
*/
/* in meters of course */
#define INNER_RADIUS 50000.0
#define INNER_ELEV 8000.0 /* was 20000 */
#define INNER_ELEV 20000.0
#define MIDDLE_RADIUS 70000.0
#define MIDDLE_ELEV 10000.0
#define MIDDLE_ELEV 4000.0
#define OUTER_RADIUS 80000.0
#define OUTER_ELEV 0.0
static GLint sky; /* sky display list */
static float sky_center[12][3];
static float sky_middle[12][3];
static float sky_outer[12][3];
@@ -67,62 +67,32 @@ static float sky_outer[12][3];
/* (Re)generate the display list */
void fgSkyInit() {
struct fgLIGHT *l;
static int dl_exists = 0;
float theta;
int i;
l = &cur_light_params;
if ( dl_exists ) {
xglDeleteLists(sky, 1);
} else {
dl_exists = 1;
printf("Generating the sky dome vertices.\n");
/* first time through, calculate sky vertices */
for ( i = 0; i < 12; i++ ) {
theta = (i * 30.0) * DEG_TO_RAD;
sky_center[i][0] = cos(theta) * INNER_RADIUS;
sky_center[i][1] = sin(theta) * INNER_RADIUS;
sky_center[i][2] = INNER_ELEV;
printf(" %.2f %.2f\n", cos(theta) * INNER_RADIUS,
sin(theta) * INNER_RADIUS);
sky_middle[i][0] = cos((double)theta) * MIDDLE_RADIUS;
sky_middle[i][1] = sin((double)theta) * MIDDLE_RADIUS;
sky_middle[i][2] = MIDDLE_ELEV;
sky_outer[i][0] = cos((double)theta) * OUTER_RADIUS;
sky_outer[i][1] = sin((double)theta) * OUTER_RADIUS;
sky_outer[i][2] = OUTER_ELEV;
}
}
printf("Creating the sky\n");
sky = xglGenLists(1);
xglNewList(sky, GL_COMPILE );
/* xglMaterialfv(GL_FRONT, GL_AMBIENT, l->scene_clear);
xglMaterialfv(GL_FRONT, GL_DIFFUSE, moon_color); */
/* Draw inner section */
xglBegin( GL_TRIANGLE_FAN );
xglColor3f(0.0, 0.0, 1.0);
xglVertex3f(0.0, 0.0, INNER_ELEV);
xglColor3f(0.2, 0.2, 1.0);
for ( i = 0; i < 12; i++ ) {
xglVertex3fv( sky_center[i] );
theta = (i * 30.0) * DEG_TO_RAD;
sky_center[i][0] = cos(theta) * INNER_RADIUS;
sky_center[i][1] = sin(theta) * INNER_RADIUS;
sky_center[i][2] = INNER_ELEV;
printf(" %.2f %.2f\n", cos(theta) * INNER_RADIUS,
sin(theta) * INNER_RADIUS);
sky_middle[i][0] = cos((double)theta) * MIDDLE_RADIUS;
sky_middle[i][1] = sin((double)theta) * MIDDLE_RADIUS;
sky_middle[i][2] = MIDDLE_ELEV;
sky_outer[i][0] = cos((double)theta) * OUTER_RADIUS;
sky_outer[i][1] = sin((double)theta) * OUTER_RADIUS;
sky_outer[i][2] = OUTER_ELEV;
}
xglVertex3fv( sky_center[0] );
xglEnd();
xglEndList();
}
@@ -130,26 +100,16 @@ void fgSkyInit() {
void fgSkyRender() {
struct fgFLIGHT *f;
struct fgVIEW *v;
/*
struct fgLIGHT *l;
struct fgTIME *t;
int i;
*/
f = &current_aircraft.flight;
v = &current_view;
/*
l = &cur_light_params;
t = &cur_time_params;
*/
/* FG_PI_2 + 0.1 is about 6 degrees after sundown and before sunrise */
/* t->sun_angle = 3.0; */ /* to force stars to be drawn (for testing) */
printf("Rendering the sky.\n");
xglDisable( GL_LIGHTING );
xglDisable( GL_CULL_FACE );
xglShadeModel( GL_SMOOTH );
xglPushMatrix();
@@ -158,23 +118,61 @@ void fgSkyRender() {
/* printf(" Translated to %.2f %.2f %.2f\n",
v->cur_zero_elev.x, v->cur_zero_elev.y, v->cur_zero_elev.z ); */
/* Rotate to proper orientation */
printf(" lon = %.2f lat = %.2f\n", FG_Longitude * RAD_TO_DEG,
FG_Latitude * RAD_TO_DEG);
xglRotatef( FG_Longitude * RAD_TO_DEG, 0.0, 0.0, 1.0 );
xglRotatef( 90.0 - FG_Latitude * RAD_TO_DEG, 0.0, 1.0, 0.0 );
xglCallList( sky );
/* xglMaterialfv(GL_FRONT, GL_AMBIENT, l->scene_clear);
xglMaterialfv(GL_FRONT, GL_DIFFUSE, moon_color); */
/* Draw inner/center section of sky*/
xglBegin( GL_TRIANGLE_FAN );
xglColor4f(0.0, 0.0, 1.0, 1.0);
xglVertex3f(0.0, 0.0, INNER_ELEV);
xglColor4f(0.2, 0.2, 0.8, 1.0);
for ( i = 0; i < 12; i++ ) {
xglVertex3fv( sky_center[i] );
}
xglVertex3fv( sky_center[0] );
xglEnd();
/* Draw the middle ring */
xglBegin( GL_TRIANGLE_STRIP );
for ( i = 0; i < 12; i++ ) {
xglVertex3fv( sky_middle[i] );
xglVertex3fv( sky_center[i] );
}
xglVertex3fv( sky_middle[0] );
xglVertex3fv( sky_center[0] );
xglEnd();
/* Draw the outer ring */
xglBegin( GL_TRIANGLE_STRIP );
for ( i = 0; i < 12; i++ ) {
xglVertex3fv( sky_outer[i] );
xglVertex3fv( sky_middle[i] );
}
xglVertex3fv( sky_outer[0] );
xglVertex3fv( sky_middle[0] );
xglEnd();
xglPopMatrix();
xglShadeModel( GL_FLAT );
xglEnable( GL_CULL_FACE );
xglEnable( GL_LIGHTING );
}
/* $Log$
/* Revision 1.2 1997/12/18 04:07:03 curt
/* Worked on properly translating and positioning the sky dome.
/* Revision 1.3 1997/12/18 23:32:36 curt
/* First stab at sky dome actually starting to look reasonable. :-)
/*
* Revision 1.2 1997/12/18 04:07:03 curt
* Worked on properly translating and positioning the sky dome.
*
* Revision 1.1 1997/12/17 23:14:30 curt
* Initial revision.
* Begin work on rendering the sky. (Rather than just using a clear screen.)