From 1a1aa37a0e65621225532c7ffecee3c45ed5fbc5 Mon Sep 17 00:00:00 2001 From: ehofman Date: Fri, 1 Aug 2003 14:20:20 +0000 Subject: [PATCH] Adjust the fog according to visibillity --- simgear/scene/sky/dome.cxx | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/simgear/scene/sky/dome.cxx b/simgear/scene/sky/dome.cxx index 813ef95d..c0fdf65f 100644 --- a/simgear/scene/sky/dome.cxx +++ b/simgear/scene/sky/dome.cxx @@ -332,7 +332,10 @@ bool SGSkyDome::repaint( sgVec4 sky_color, sgVec4 fog_color, double sun_angle, sgVec4 lower_color[12]; sgVec4 bottom_color[12]; - double vis_factor; + double vis_factor, cvf = vis; + + if (cvf > 45000) + cvf = 45000; if ( vis < 3000.0 ) { vis_factor = (vis - 1000.0) / 2000.0; @@ -356,9 +359,11 @@ bool SGSkyDome::repaint( sgVec4 sky_color, sgVec4 fog_color, double sun_angle, // printf("sky = %.2f fog = %.2f diff = %.2f\n", // l->sky_color[j], l->fog_color[j], diff); - upper_color[i][j] = sky_color[j] - diff * ( 1.0 - vis_factor * 0.7); - middle_color[i][j] = sky_color[j] - diff * ( 1.0 - vis_factor * 0.1) - + middle_amt[j]; + upper_color[i][j] = sky_color[j] - diff * + ( 1.0 - vis_factor * (0.7 + 0.3 * cvf/45000) ); + middle_color[i][j] = sky_color[j] - diff * + ( 1.0 - vis_factor * (0.1 + 0.85 * cvf/45000) ) + + middle_amt[j]; lower_color[i][j] = fog_color[j] + outer_amt[j]; if ( upper_color[i][j] > 1.0 ) { upper_color[i][j] = 1.0; } @@ -397,9 +402,11 @@ bool SGSkyDome::repaint( sgVec4 sky_color, sgVec4 fog_color, double sun_angle, // printf("sky = %.2f fog = %.2f diff = %.2f\n", // sky_color[j], fog_color[j], diff); - upper_color[i][j] = sky_color[j] - diff * ( 1.0 - vis_factor * 0.7); - middle_color[i][j] = sky_color[j] - diff * ( 1.0 - vis_factor * 0.1) - + middle_amt[j]; + upper_color[i][j] = sky_color[j] - diff * + ( 1.0 - vis_factor * (0.7 + 0.3 * cvf/45000) ); + middle_color[i][j] = sky_color[j] - diff * + ( 1.0 - vis_factor * (0.1 + 0.85 * cvf/45000) ) + + middle_amt[j]; lower_color[i][j] = fog_color[j] + outer_amt[j]; if ( upper_color[i][j] > 1.0 ) { upper_color[i][j] = 1.0; } -- 2.39.5