From feabb5024a62f358b1dce1b8697b4afa78c0a60f Mon Sep 17 00:00:00 2001 From: curt Date: Tue, 23 Dec 1997 04:58:38 +0000 Subject: [PATCH] Tweaked the sky coloring a bit to build in structures to allow finer rgb control. --- Scenery/sky.c | 97 +++++++++++++++++++++++++++++--------------------- Time/fg_time.c | 14 +++++--- Time/sunpos.c | 12 ++++--- 3 files changed, 74 insertions(+), 49 deletions(-) diff --git a/Scenery/sky.c b/Scenery/sky.c index 6b2b062d2..bbd8aeab6 100644 --- a/Scenery/sky.c +++ b/Scenery/sky.c @@ -103,8 +103,8 @@ void fgSkyVerticesInit() { void fgSkyColorsInit() { struct fgLIGHT *l; float sun_angle, diff; - float outer_red_param, outer_red_amt, outer_red_diff; - float middle_red_param, middle_red_amt, middle_red_diff; + float outer_param[3], outer_amt[3], outer_diff[3]; + float middle_param[3], middle_amt[3], middle_diff[3]; int i, j; l = &cur_light_params; @@ -117,46 +117,55 @@ void fgSkyColorsInit() { if ( (sun_angle > 80.0) && (sun_angle < 100.0) ) { /* 0.0 - 0.4 */ - outer_red_param = (10.0 - fabs(90.0 - sun_angle)) / 25.0; - outer_red_diff = outer_red_param / 6.0; - } else { - outer_red_param = 0.0; - outer_red_diff = 0.0; - } - printf(" outer_red_param = %.2f outer_red_diff = %.2f\n", - outer_red_param, outer_red_diff); + outer_param[0] = (10.0 - fabs(90.0 - sun_angle)) / 25.0; + outer_param[1] = (10.0 - fabs(90.0 - sun_angle)) / 45.0; + outer_param[2] = 0.0; - if ( (sun_angle > 85.0) && (sun_angle < 95.0) ) { - /* 0.0 - 0.4 */ - middle_red_param = (5.0 - fabs(90.0 - sun_angle)) / 12.5; - middle_red_diff = middle_red_param / 6.0; + middle_param[0] = (10.0 - fabs(90.0 - sun_angle)) / 40.0; + middle_param[1] = (10.0 - fabs(90.0 - sun_angle)) / 60.0; + middle_param[2] = 0.0; + + outer_diff[0] = outer_param[0] / 6.0; + outer_diff[1] = outer_param[1] / 6.0; + outer_diff[2] = outer_param[2] / 6.0; + + middle_diff[0] = middle_param[0] / 6.0; + middle_diff[1] = middle_param[1] / 6.0; + middle_diff[2] = middle_param[2] / 6.0; } else { - middle_red_param = 0.0; - middle_red_diff = 0.0; + outer_param[0] = outer_param[1] = outer_param[2] = 0.0; + middle_param[0] = middle_param[1] = middle_param[2] = 0.0; + + outer_diff[0] = outer_diff[1] = outer_diff[2] = 0.0; + middle_diff[0] = middle_diff[1] = middle_diff[2] = 0.0; } - printf(" middle_red_param = %.2f middle_red_diff = %.2f\n", - middle_red_param, middle_red_diff); + /* printf(" outer_red_param = %.2f outer_red_diff = %.2f\n", + outer_red_param, outer_red_diff); */ /* calculate transition colors between sky and fog */ - outer_red_amt = outer_red_param; - middle_red_amt = middle_red_param; + for ( j = 0; j < 3; j++ ) { + outer_amt[j] = outer_param[j]; + middle_amt[j] = middle_param[j]; + } for ( i = 0; i < 6; i++ ) { for ( j = 0; j < 3; j++ ) { diff = l->sky_color[j] - l->fog_color[j]; + inner_color[i][j] = l->sky_color[j] - diff * 0.3; - middle_color[i][j] = l->sky_color[j] - diff * 0.9; - outer_color[i][j] = l->fog_color[j]; + middle_color[i][j] = l->sky_color[j] - diff * 0.9 + middle_amt[j]; + outer_color[i][j] = l->fog_color[j] + outer_amt[j]; + + if ( middle_color[i][j] > 1.0 ) { middle_color[i][j] = 1.0; } + if ( outer_color[i][j] > 1.0 ) { outer_color[i][j] = 1.0; } } - outer_color[i][0] += outer_red_amt; - middle_color[i][0] += middle_red_amt; - if ( outer_color[i][0] > 1.0 ) { outer_color[i][0] = 1.0; } - if ( middle_color[i][0] > 1.0 ) { middle_color[i][0] = 1.0; } inner_color[i][3] = middle_color[i][3] = outer_color[i][3] = l->sky_color[3]; - outer_red_amt -= outer_red_diff; - middle_red_amt -= middle_red_diff; + for ( j = 0; j < 3; j++ ) { + outer_amt[j] -= outer_diff[j]; + middle_amt[j] -= middle_diff[j]; + } printf("inner_color[%d] = %.2f %.2f %.2f %.2f\n", i, inner_color[i][0], inner_color[i][1], inner_color[i][2], inner_color[i][3]); @@ -168,26 +177,30 @@ void fgSkyColorsInit() { outer_color[i][3]); } - outer_red_amt = 0.0; - middle_red_amt = 0.0; + for ( j = 0; j < 3; j++ ) { + outer_amt[j] = 0.0; + middle_amt[j] = 0.0; + } for ( i = 6; i < 12; i++ ) { for ( j = 0; j < 3; j++ ) { diff = l->sky_color[j] - l->fog_color[j]; + inner_color[i][j] = l->sky_color[j] - diff * 0.3; - middle_color[i][j] = l->sky_color[j] - diff * 0.9; - outer_color[i][j] = l->fog_color[j]; + middle_color[i][j] = l->sky_color[j] - diff * 0.9 + middle_amt[j]; + outer_color[i][j] = l->fog_color[j] + outer_amt[j]; + + if ( middle_color[i][j] > 1.0 ) { middle_color[i][j] = 1.0; } + if ( outer_color[i][j] > 1.0 ) { outer_color[i][j] = 1.0; } } - outer_color[i][0] += outer_red_amt; - middle_color[i][0] += middle_red_amt; - if ( outer_color[i][0] > 1.0 ) { outer_color[i][0] = 1.0; } - if ( middle_color[i][0] > 1.0 ) { middle_color[i][0] = 1.0; } inner_color[i][3] = middle_color[i][3] = outer_color[i][3] = l->sky_color[3]; - outer_red_amt += outer_red_diff; - middle_red_amt += middle_red_diff; + for ( j = 0; j < 3; j++ ) { + outer_amt[j] += outer_diff[j]; + middle_amt[j] += middle_diff[j]; + } printf("inner_color[%d] = %.2f %.2f %.2f %.2f\n", i, inner_color[i][0], inner_color[i][1], inner_color[i][2], inner_color[i][3]); @@ -302,9 +315,13 @@ void fgSkyRender() { /* $Log$ -/* Revision 1.7 1997/12/22 23:45:48 curt -/* First stab at sunset/sunrise sky glow effects. +/* Revision 1.8 1997/12/23 04:58:38 curt +/* Tweaked the sky coloring a bit to build in structures to allow finer rgb +/* control. /* + * Revision 1.7 1997/12/22 23:45:48 curt + * First stab at sunset/sunrise sky glow effects. + * * Revision 1.6 1997/12/22 04:14:34 curt * Aligned sky with sun so dusk/dawn effects can be correct relative to the sun. * diff --git a/Time/fg_time.c b/Time/fg_time.c index 07acaa3d8..03e2e7d6f 100644 --- a/Time/fg_time.c +++ b/Time/fg_time.c @@ -232,8 +232,8 @@ void fgTimeUpdate(struct fgFLIGHT *f, struct fgTIME *t) { /* get current Unix calendar time (in seconds) */ /* warp = 60; */ - warp += 0; - t->cur_time = time(NULL) + (0) * 60 * 60; + warp += 100; + t->cur_time = time(NULL) + (-3.5) * 60 * 60; t->cur_time += warp; printf("Current Unix calendar time = %ld warp = %ld\n", t->cur_time, warp); @@ -285,10 +285,14 @@ void fgTimeUpdate(struct fgFLIGHT *f, struct fgTIME *t) { /* $Log$ -/* Revision 1.20 1997/12/15 23:55:06 curt -/* Add xgl wrappers for debugging. -/* Generate terrain normals on the fly. +/* Revision 1.21 1997/12/23 04:58:39 curt +/* Tweaked the sky coloring a bit to build in structures to allow finer rgb +/* control. /* + * Revision 1.20 1997/12/15 23:55:06 curt + * Add xgl wrappers for debugging. + * Generate terrain normals on the fly. + * * Revision 1.19 1997/12/15 20:59:10 curt * Misc. tweaks. * diff --git a/Time/sunpos.c b/Time/sunpos.c index e1b0e16a6..41fe18543 100644 --- a/Time/sunpos.c +++ b/Time/sunpos.c @@ -301,7 +301,7 @@ void fgUpdateSunPos(struct fgCartesianPoint scenery_center) { l->sun_vec[3] = 0.0; l->sun_vec_inv[3] = 0.0; - /* calculate thesun's relative angle to local up */ + /* calculate the sun's relative angle to local up */ MAT3_COPY_VEC(nup, v->local_up); nsun[0] = l->fg_sunpos.x; nsun[1] = l->fg_sunpos.y; @@ -316,10 +316,14 @@ void fgUpdateSunPos(struct fgCartesianPoint scenery_center) { /* $Log$ -/* Revision 1.17 1997/12/15 23:55:08 curt -/* Add xgl wrappers for debugging. -/* Generate terrain normals on the fly. +/* Revision 1.18 1997/12/23 04:58:40 curt +/* Tweaked the sky coloring a bit to build in structures to allow finer rgb +/* control. /* + * Revision 1.17 1997/12/15 23:55:08 curt + * Add xgl wrappers for debugging. + * Generate terrain normals on the fly. + * * Revision 1.16 1997/12/11 04:43:57 curt * Fixed sun vector and lighting problems. I thing the moon is now lit * correctly. -- 2.39.2