From: curt <curt>
Date: Tue, 26 Nov 2002 02:29:03 +0000 (+0000)
Subject: Having the runway lights "pop" in at a specific range is not 100% realistic.
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=98dca167941d4fb16f77ba6ded3c9c2a40efacbe;p=flightgear.git

Having the runway lights "pop" in at a specific range is not 100% realistic.
I have updated the lighting code to use fog to try to fade the runway lights
in smoothly, but still keep them from being visible until you are about 7-10
miles out, and then only have them be very faint at first.  I think what I
have is a bit nicer than before since it completely avoids the "popping" effect,
but I've very open to tweaking the actual ranges based on people's real
world experiences.
---

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index efde56729..ca3e7f413 100644
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -467,8 +467,13 @@ void fgRenderFrame() {
 
         fog_exp_density = m_log01 / actual_visibility;
         fog_exp2_density = sqrt_m_log01 / actual_visibility;
-        rwy_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 2.5 );
-        taxi_exp2_punch_through = sqrt_m_log01 / ( actual_visibility * 1.5 );
+        if ( actual_visibility < 8000 ) {
+            rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
+            taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
+        } else {
+            rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
+            taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
+        }
     }
 
     // double angle;
diff --git a/src/Objects/pt_lights.cxx b/src/Objects/pt_lights.cxx
index c37e17330..d12a8733e 100644
--- a/src/Objects/pt_lights.cxx
+++ b/src/Objects/pt_lights.cxx
@@ -246,7 +246,7 @@ ssgTransform *gen_dir_light_group( const point_list &nodes,
     // put an LOD on each lighting component
     ssgRangeSelector *lod = new ssgRangeSelector;
     lod->setRange( 0, SG_ZERO );
-    lod->setRange( 1, 12000 );
+    lod->setRange( 1, 20000 );
     lod->addKid( leaf );
 
     // create the transformation.