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Adjust the fog according to visibillity

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This commit is contained in:
ehofman
2003-08-01 14:20:20 +00:00
parent 7d3abdc512
commit 1a1aa37a0e
1 changed files with 14 additions and 7 deletions
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21
simgear/scene/sky/dome.cxx
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@@ -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; }