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

diff --git a/Scenery/astro.c b/Scenery/astro.c
index 411fd6b1493aef8aa57557446476c9a48e0693a5..4e1558e748eaf5e5eb579e819b2685d1f3b73a41 100644 (file)
--- a/Scenery/astro.c
+++ b/Scenery/astro.c
@@ -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.
  *

diff --git a/Scenery/sky.c b/Scenery/sky.c
index 046d36be069983b9e8b4388702c6892ae28d5677..ef81c8b53e6f5299836314d059eda14aad24dd29 100644 (file)
--- a/Scenery/sky.c
+++ b/Scenery/sky.c
@@ -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;
+    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;
+       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] );
-    }
-    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.)