Lessen the sky color glitch when quickly turning to look up after looking at ground...

diff --git a/src/sky.cpp b/src/sky.cpp
index 22b12ca1ba6c687c57dc4a3e1c3870dd5f0a4918..e55dd1eb22300eef6cd322afb7b420dbf1cd97b9 100644 (file)
--- a/src/sky.cpp
+++ b/src/sky.cpp
@@ -433,9 +433,14 @@ void Sky::update(float time_of_day, float time_brightness,
        //video::SColorf cloudcolor_bright_dawn_f(1.0, 0.65, 0.44);
        video::SColorf cloudcolor_bright_dawn_f(1.0, 0.7, 0.5);
 
+       float cloud_color_change_fraction = 0.95;
        if(sunlight_seen){
-               //m_brightness = m_brightness * 0.95 + direct_brightness * 0.05;
-               m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
+               if(fabs(time_brightness - m_brightness) < 0.2){
+                       m_brightness = m_brightness * 0.95 + time_brightness * 0.05;
+               } else {
+                       m_brightness = m_brightness * 0.80 + time_brightness * 0.20;
+                       cloud_color_change_fraction = 0.0;
+               }
        }
        else{
                if(direct_brightness < m_brightness)
@@ -493,8 +498,8 @@ void Sky::update(float time_of_day, float time_brightness,
        } else {
                cloud_direct_brightness = direct_brightness;
        }
-       m_cloud_brightness = m_cloud_brightness * 0.95 +
-                       cloud_direct_brightness * (1.0 - 0.95);
+       m_cloud_brightness = m_cloud_brightness * cloud_color_change_fraction +
+                       cloud_direct_brightness * (1.0 - cloud_color_change_fraction);
        m_cloudcolor_f = video::SColorf(
                        m_cloudcolor_bright_f.getRed() * m_cloud_brightness,
                        m_cloudcolor_bright_f.getGreen() * m_cloud_brightness,